JP6346355B2 - Gas circuit breaker - Google Patents

Description

  Embodiments described herein relate generally to a gas circuit breaker.

  2. Description of the Related Art As a protective switch that performs current switching in an electric power system, a gas circuit breaker that fills a sealed container made of a grounded metal or a soot tube with an arc-extinguishing gas and interrupts the current is widely used.

  As an example of a conventional gas circuit breaker, there is a two-point gas circuit breaker having two arc extinguishing chambers as shown in FIG.

  FIG. 11 is a cross-sectional view of a conventional gas circuit breaker as seen from the front.

  A conventional gas circuit breaker includes a container 101, a supporting insulating cylinder 103, an arc extinguishing chamber 104, a blocking portion 105, a first contact portion 106, a second contact portion 107, a first link group 108, an insulating operation rod 109, and a mechanism box 110. , An operation mechanism 111, an actuator 112, an output shaft 113, a second link group 114, a container support 115, and an installation base 116.

  The container 101 is filled with an arc extinguishing gas 102 such as SF6 (sulfur hexafluoride) or CO2 (carbon dioxide). A support insulating cylinder 103 is provided substantially at the center in the axial direction of the container 101 so as to be substantially perpendicular to the axial direction of the container 101 and includes two arc extinguishing chambers 104 (the arc extinguishing chamber on the right side in FIG. 1 is omitted). The blocking part 105 is supported by the support insulating cylinder 103.

  The arc extinguishing chamber 104 has a first contact portion 106 fixed at a fixed position of the container 101 and a second contact portion 107 movable in the axial direction of the container 101, and the first contact portion 106 and the second contact portion. 107 are arranged to face each other.

  An end portion of the second contact portion 107 opposite to the first contact portion 106 side is connected to an insulating operation rod 109 that passes through a substantially central portion of the support insulating cylinder 103 via the first link group 108.

  A mechanism box 110 is attached to the outside of the container 101, and an operation mechanism 111 is accommodated in the mechanism box 110.

  The operation mechanism 111 includes an actuator 112 and a hydraulic mechanism and a spring mechanism (not shown). The actuator 112 converts the energy generated by a hydraulic mechanism or a spring mechanism (not shown) into a driving force necessary for the contact opening / closing operation.

  One end of the insulation operating rod 109 and the output shaft 113 of the actuator 112 are connected via the second link group 114, and the insulation operation rod 109 and the output shaft 113 of the actuator 112 form a positional relationship of approximately 90 degrees.

  The container 101 is installed on the installation base 116 by the container support part 115 arrange | positioned at four corners, for example.

  In the conventional gas circuit breaker configured as described above, the driving force in the direction of arrow G of the actuator 112 is transmitted to the second contact portion 107 via the second link group 114, the insulating operation rod 109 and the first link group 108. Then, the second contact portion 107 is driven in the arrow G direction. That is, the driving force of the actuator 112 in the direction of arrow G is once converted into a force in the direction of arrow H by the second link group 114 and converted again into a force in the direction of arrow G by the first link group 108.

  Then, when the second contact portion 107 is driven in the direction of arrow G, the first contact portion 106 and the second contact portion 107 come in contact with each other, and the circuit is opened and closed.

JP 2009-59581 A

  In the conventional gas circuit breaker as described above, the energy loss until the driving force of the actuator 112 is transmitted to the second contact portion 107 increases through the two link groups 108 and 114.

  Therefore, the problem to be solved by the present invention is to provide a gas circuit breaker that can reduce the energy loss of the driving force from the actuator.

  The gas circuit breaker according to the embodiment includes a sealed container filled with an arc-extinguishing gas, a first contact part disposed in the container, a counter contact with the first contact part, and movable in the container axial direction. A second contact portion that can be brought into and out of contact with the first contact portion, an end portion opposite to the first contact portion side of the second contact portion, and one end thereof via the link to the second contact portion. An insulation operating rod connected to the angle of about 90 degrees with respect to the insulation operation rod, and a drive force for operating the second contact portion is transmitted to the other end of the insulation operation rod. An actuator having an output shaft, an operation mechanism incorporating the actuator on the side opposite to the insulating operation rod side of the output shaft, and a connecting portion between the seal rod and the actuator are located inside Supports the container and the operation mechanism Comprising a mechanism support, the said mechanism support has a cutout large enough to take out the output shaft of the actuator to the operating mechanism side end portion.

Sectional drawing which looked at the gas circuit breaker which concerns on 1st Embodiment from the front. The front view which shows the taking-out direction of the operation mechanism in the gas circuit breaker which concerns on 1st Embodiment. The side view of the gas circuit breaker which concerns on 2nd Embodiment. DD sectional drawing of FIG. The side view of the gas circuit breaker which concerns on 3rd Embodiment. F arrow line view of FIG. The front view of the gas circuit breaker which concerns on 4th Embodiment. The front view of the gas circuit breaker which concerns on 5th Embodiment. The side view of the gas circuit breaker which concerns on 6th Embodiment. The modification of the gas circuit breaker which concerns on 6th Embodiment. Sectional drawing which looked at the conventional gas circuit breaker from the front.

  Hereinafter, embodiments will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a cross-sectional view of the gas circuit breaker according to the first embodiment as viewed from the front.

  The gas circuit breaker of the present embodiment includes a container 1, a support insulating cylinder 3, an arc extinguishing chamber 4, a cutoff part 5, a first contact part 7, a second contact part 8, a main circuit conductor 9, a coupling part 10, and a link group. 11, insulating rod 12, mechanism box 13, operation mechanism 14, actuator 15, mechanism support 16, seal rod 17, and container support 20.

  The container 1 is filled with an arc extinguishing gas 2 such as SF6 (sulfur hexafluoride) or CO2 (carbon dioxide). A support insulating cylinder 3 is provided in the container 1 so as to be substantially perpendicular to the axial direction of the container 1. On the other hand, two arc extinguishing chambers 4 (see FIG. The right-hand arc extinguishing chamber is omitted), and the blocking portion 5 is supported by the support insulating cylinder 3.

  The arc extinguishing chamber 4 has a first contact portion 7 fixed at a fixed position of the container 1 and a second contact portion 8 movable in the axial direction of the container 1, and the first contact portion 7 and the second contact portion. 8 are arranged facing each other.

  The end of the first contact portion 7 opposite to the second contact portion 8 side is electrically connected to the main circuit conductor 9 in a positional relationship of approximately 90 degrees (including 90 degrees). Is connected to a bus or a bushing (not shown) through a coupling portion 10 formed in the container 1.

  The end of the second contact portion 8 opposite to the first contact portion 7 side is connected to one end of an insulating operation rod 12 that passes through the substantially central portion of the support insulating cylinder 3 via the link group 11. That is, the second contact portion 8 and the insulating operation rod 12 have a positional relationship of approximately an angle of 90 degrees (including 90 degrees).

  A mechanism box 13 is attached to the outside of the container 1, and an operation mechanism 14 is accommodated in the mechanism box 13.

  The operation mechanism 14 includes an actuator 15 and a hydraulic mechanism and a spring mechanism (not shown). The actuator 112 converts the energy generated by a hydraulic mechanism or a spring mechanism (not shown) into a driving force necessary for the blocking operation.

  The actuator 15 is provided with an output shaft 18, and its end is connected to one end of the seal rod 17. The other end of the seal rod 17 is connected to the end of the insulating operation rod 12 opposite to the link group 11, and transmits the driving force of the actuator 15 to the second contact portion.

The insulating operation rod 12, the seal rod 17, and the output shaft 18 of the actuator 15 are arranged on substantially the same axis.

  The insulating operation rod 12 is made of an insulating material made of a composite material such as a resin such as epoxy or Teflon (registered trademark) or FRP, and electrically insulates between the operation mechanism 14 and the blocking portion 5.

  Since the seal rod 17 penetrates the mechanism box 13 that is an atmospheric atmosphere and the container 1 filled with the arc extinguishing gas 2, a seal (not shown) is provided on the sliding surface of the seal rod 17 and the penetration portion of the container 1. The airtightness is maintained by providing the mechanism.

  The operation mechanism 14 is supported by a cylindrical mechanism support 16 provided between the container 1 and the operation mechanism 14, and a connecting portion 19 between the seal rod 17 and the output shaft 18 of the actuator 15 is located in the mechanism support 16. To do.

  Here, the “cylindrical shape” is not limited to a cylinder, and includes a square tube and the like.

  At least one surface of the mechanism box 13 is detachable so that the operation mechanism 14 can be taken out and stored.

  When the operating mechanism 14 is removed from the mechanism box 13, the connecting portion 19 between the seal rod 17 and the output shaft 18 of the actuator 15 is disconnected.

  The containers 1 are installed on the installation base 21 by, for example, a total of four container support portions 20 arranged two by two near the end.

  Next, the interruption | blocking operation | movement in the gas circuit breaker of 1st Embodiment comprised in this way is demonstrated using FIG.

  The driving force of the actuator 15 in the direction of arrow A (FIG. 1) is transmitted to the second contact portion 8 via the seal rod 17, the insulating operation rod 12 and the link group 11, and the second contact portion 8 is moved toward the arrow A. It is driven in the direction of arrow B (FIG. 1) which is approximately 90 degrees. That is, the driving force of the actuator 15 in the direction of arrow A is converted into the force in the direction of arrow B by the link group 11.

  Then, when the second contact portion 8 is driven in the direction of the arrow B, the first contact portion 7 and the second contact portion 8 come in contact with each other, and current is opened and closed.

  The arc extinguishing chamber on the right side in FIG. 1 (not shown) has the same configuration and performs the same operation.

  In the conventional gas circuit breaker shown in FIG. 11, since the driving force of the actuator 112 is transmitted to the second contact portion 107 via the two link groups 108 and 114, the friction force in the link groups 108 and 114, the link The energy loss of the driving force of the actuator 15 increases, such as an increase in driving mass due to the parts constituting the groups 108 and 114 and a delay in the movable transmission time due to a minute gap between the parts constituting the link groups 108 and 114.

  On the other hand, the gas circuit breaker according to the first embodiment has a configuration in which the second link group 114 is omitted, and the energy loss of the driving force generated thereby is eliminated, and the energy loss of the driving force from the actuator 15 as a whole is reduced. Can be reduced.

  Further, omitting the second link group 114 leads to a cost reduction due to a decrease in the number of parts, a failure rate reduction, and an improvement in maintainability.

  The conventional gas circuit breaker shown in FIG. 11 is configured such that the insulating operation rod 109 and the output shaft 113 of the actuator 112 form a positional relationship of approximately 90 degrees.

  Therefore, when the operation mechanism 111 is taken out of the mechanism box 110 for maintenance or replacement of the actuator 112 or the like, the container support 115 is obstructed, and the operation mechanism 111 cannot be taken out in the longitudinal direction of the container 101. It is necessary to take out in a direction perpendicular to the longitudinal direction (perpendicular to the plane of FIG. 11).

  Normally, a plurality of such gas circuit breakers are arranged in a direction perpendicular to the longitudinal direction of the container 101. Therefore, when taking out the operation mechanism 111 in this direction, it is necessary to provide a working space between the adjacent gas circuit breakers. is there.

  On the other hand, according to the gas circuit breaker of the first embodiment shown in FIGS. 1 and 2, the output shaft 18 of the actuator 15 is arranged coaxially with the insulation operation rod 12, and the insulation operation rod 12 of the output shaft 18. The operation mechanism 14 is disposed on the side opposite to the side.

  Therefore, as shown in FIG. 2, it is possible to ensure a sufficient space between the mechanism box 13 and the container support portion 20, and the operation mechanism 14 can be taken out in the longitudinal direction (arrow C) of the container 1.

  Accordingly, it is not necessary to provide a work space between the adjacent gas circuit breakers, and the distance between the adjacent gas circuit breakers can be shortened. This leads to a reduction in equipment installation space.

(Second Embodiment)
A second embodiment will be described with reference to FIGS. In addition, the same part as each part of the gas circuit breaker of 1st Embodiment is shown with the same code | symbol, and the description is abbreviate | omitted.

  FIG. 3 is a side view of the gas circuit breaker according to the second embodiment, and FIG. 4 is a sectional view taken along the line DD of FIG.

  The second embodiment is different from the first embodiment in that the central axis of the insulating operation rod 12 is positioned substantially parallel (including parallel) to the installation base 21.

  Since the insulating operation rod 12, the seal rod 17 and the output shaft 18 of the actuator 15 are arranged on substantially the same axis as in the first embodiment, the output shaft 18 of the actuator 15 indicated by the arrow E in FIG. The operation direction is also substantially parallel to the installation base 21.

  According to the gas circuit breaker according to the second embodiment described above, the central axis of the insulating operation rod 12 is configured to be positioned substantially parallel to the installation base 21, thereby obtaining the first embodiment. In addition to the effect, the height of the gas circuit breaker can be suppressed.

  Thereby, earthquake resistance and maintainability can be improved.

(Third embodiment)
A third embodiment will be described with reference to FIGS. In addition, the same part as each part of the gas circuit breaker of 1st Embodiment and 2nd Embodiment is shown with the same code | symbol, and the description is abbreviate | omitted.

  FIG. 5 is a side view of a gas circuit breaker according to the third embodiment, and FIG. 6 is a view taken in the direction of arrow F in FIG.

  The third embodiment is different from the second embodiment in that the central axis 100 of the coupling portion 10 and the central axis of the insulating operation rod 12 are located substantially parallel (including parallel).

  According to the gas circuit breaker according to the third embodiment, as shown in FIG. 6, the gas insulated switchgear (GIS) component 23 such as a bus bar or a bushing attached to the coupling unit 10 is substantially the same as the container 1. The height can be suppressed. That is, it leads to suppression of the height as the whole GIS.

  Further, since the space around the mechanism box 13 can be effectively used, the installation space of the entire GIS can be reduced.

  In FIG. 6, the central axis 100 of the coupling portion 10 is set in the same direction as the protruding direction of the mechanism box 13, but may be 180 ° opposite to the protruding direction of the mechanism box 13.

(Fourth embodiment)
A fourth embodiment will be described with reference to FIG. In addition, the same part as each part of the gas circuit breaker of 1st Embodiment thru | or 3rd Embodiment is shown with the same code | symbol, and the description is abbreviate | omitted.

  FIG. 7 is a front view of a gas circuit breaker according to the fourth embodiment.

  The fourth embodiment is different from the first to third embodiments in that the operation mechanism 14 and the mechanism box 13 are fixed, and the mechanism box 13 is fixed to the installation base 21. .

  Specifically, for example, an operation mechanism fastening member 24 and a mechanism box fastening member 25 are provided.

  As shown in FIG. 7, the operation mechanism fastening member 24 is provided between the outer peripheral surface of the operation mechanism 14 and the inner peripheral surface of the mechanism box 13, and fastens the operation mechanism 14 and the mechanism box 13.

  In FIG. 7, as an example, the operation mechanism fastening member 24 is disposed on the bottom surface of the operation mechanism 14 and the inner surface of the mechanism box 13 facing the surface.

  The mechanism box fastening member 25 fastens the outer peripheral surface of the mechanism box 13 and the installation base 21, and as an example in FIG. 7, the mechanism box fastening member 25 is disposed between the bottom surface of the mechanism box 13 and the installation base 21.

  According to the gas circuit breaker according to the fourth embodiment described above, the operation mechanism 14 and the mechanism box 13 are fastened by the operation mechanism fastening member 24, and the mechanism box 13 and the installation base 21 are connected by the mechanism box fastening member 25. Since it is fastened, in addition to the effects obtained in the first embodiment, the stability of the entire device can be improved. In particular, vibrations that propagate to the container 1 when the actuator 15 is driven can be reduced.

  This makes it possible to improve the earthquake resistance while reducing the cost by reducing the rigidity of the equipment member.

  Although FIG. 7 shows an example in which one operation mechanism fastening member 24 and two mechanism box fastening members 25 are provided, the number of each is not limited thereto.

  7 shows a configuration in which an operation mechanism fastening member 24 and a mechanism box fastening member 25 are added to the first embodiment, but only the operation mechanism fastening member 24 is used in the second embodiment or the third embodiment. A configuration added to the embodiment may be used, and the same effect can be obtained.

  However, it is not always necessary to have the operation mechanism fastening member 24 or the mechanism box fastening member 25. If the operation mechanism 14 and the mechanism box 13 are fixed, or if the mechanism box 13 and the installation base 21 are fixed, the device Stability can be improved.

(Fifth embodiment)
A fifth embodiment will be described with reference to FIG. In addition, the same part as each part of the gas circuit breaker of 1st Embodiment thru | or 4th Embodiment is shown with the same code | symbol, and the description is abbreviate | omitted.

  FIG. 8 is a front view of the gas circuit breaker according to the fifth embodiment.

  The fifth embodiment is different from the first to fourth embodiments in that the mechanism support 16 has a notch 26.

  The notch 26 is provided at the end of the mechanism support 16 on the side of the operation mechanism 14 and has a size sufficient to take out the output shaft 18 of the actuator 15.

  According to the gas circuit breaker according to the fifth embodiment described above, when the operation mechanism 14 is taken out from the mechanism box 13, the connecting portion 19 between the seal rod 17 and the output shaft 18 of the actuator 15 is cut off, and the notch 26 is cut. It can be taken out by passing the output shaft 18 through.

  That is, in order to take out the operation mechanism 14 from the mechanism box 13 when the notch 26 is not provided, the connecting portion 19 between the seal rod 17 and the output shaft 18 of the actuator 15 is disconnected, and the actuator 15 is moved in the direction of the installation base 21. It is necessary to move the distance L1.

  On the other hand, in this embodiment, by having the notch 26, the movement distance for moving the actuator 15 in the direction of the installation base 21 may be L2, and the distance for moving the operation mechanism 14 can be shortened.

  As a result, the operation of taking out the operation mechanism 14 can be facilitated.

  Moreover, since the moving distance of the operation mechanism 14 can be shortened, the mechanism box 13 can be made small, and the height of the gas circuit breaker can be suppressed.

  Furthermore, by making the bottom surface of the mechanism box 13 detachable, the take-out operation becomes easier.

  Although FIG. 8 shows a configuration having the notch 26 as compared with the first embodiment, the present invention may be applied to the second to fourth embodiments, and the operation mechanism 14 is taken out. Can be facilitated.

(Sixth embodiment)
A sixth embodiment will be described with reference to FIG. In addition, the same part as each part of the gas circuit breaker of 1st Embodiment thru | or 5th Embodiment is shown with the same code | symbol, and the description is abbreviate | omitted.

  FIG. 9 is a side view of the gas circuit breaker according to the sixth embodiment.

  This sixth embodiment shows an example in which three gas circuit breakers according to the first embodiment are arranged in parallel to the longitudinal direction of the container 1 to form a three-phase structure.

  As shown in FIG. 9, the containers 1 of the adjacent phases are phase connection members 27A that directly fasten the containers, and the container support portions 20 that support the containers 1 of the phases are fixed by the phase connection members 27B. The

  According to the gas circuit breaker according to the sixth embodiment configured as described above, the container 1 or the container support 20 of each adjacent phase is fixed by the phase coupling members 27A and 27B, thereby stabilizing the device. Can improve earthquake resistance.

  As the earthquake resistance is improved, the number of container support members 20 per phase can be reduced from four to two as shown in FIG. 9, which can contribute to cost reduction while maintaining the stability of the device.

  Further, as described in the first embodiment, since the output shaft 18 of the actuator 15 is arranged coaxially with the insulating operation rod 12, the distance between adjacent gas circuit breakers can be shortened. The length of the phase connecting members 27A and 27B can be short. This can also contribute to cost reduction.

  As a modification of the present embodiment, a container support portion 20 may be provided on the phase connecting member 27A as shown in FIG. With this configuration, a space can be secured around the mechanism box 13 and the operation of taking out the operation mechanism 14 from the mechanism box 13 is facilitated.

  In the first to sixth embodiments described above, a two-point cut-off gas circuit breaker having two arc-extinguishing chambers 4 is shown as an example, but a one-point cut-off gas cut-off with one arc-extinguishing chamber 4 is shown. The present invention may be applied to a multi-cut gas circuit breaker having three or more arc extinguishing chambers 4 or arc extinguishing chambers 4, and the same effects as those of the embodiments can be obtained.

  Although several embodiments of the present invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof in the same manner as included in the scope and gist of the invention.

DESCRIPTION OF SYMBOLS 1 ... Sealed container 2 ... Arc-extinguishing gas 3 ... Support insulation cylinder 4 ... Arc-extinguishing chamber 5 ... Blocking part 7 ... 1st contact part 8 ... 2nd contact part 9 ... Main circuit conductor 10 ... Coupling part 11 ... Link group DESCRIPTION OF SYMBOLS 12 ... Insulation operation rod 13 ... Mechanism box 14 ... Operation mechanism 15 ... Actuator 16 ... Mechanism support 17 ... Seal rod 18 ... Output shaft 19 ... Connection part 20 ... Container support part 21 ... Installation base 23 ... GIS component 24 ... Operation mechanism Fastening member 25 ... Mechanism box fastening member 26 ... Notch 27 ... Phase connecting member

Claims (9)

A sealed container filled with arc-extinguishing gas;
A first contact portion disposed in the container;
A second contact portion disposed opposite to the first contact portion, movable in the container axial direction, and capable of contacting and separating from the first contact portion;
An insulating operation rod whose one end is connected to the second contact portion at an angle of approximately 90 degrees via a link and an end opposite to the first contact portion side of the second contact portion;
An actuator having an output shaft that is arranged substantially coaxially with the insulating operation rod and that transmits a driving force for operating the second contact portion to the other end of the insulating operation rod;
On the side opposite to the insulated operating rod side of the output shaft, an operating mechanism incorporating the actuator,
A mechanism support for supporting the container and the operation mechanism so that a connecting portion between the seal rod and the actuator is located inside;
With
The mechanism support is a gas circuit breaker having a notch large enough to take out the output shaft of the actuator at the end of the operation mechanism. The seal rod is disposed between the other end portion of the insulation operation rod and the output shaft of the actuator, and has a seal rod that transmits the driving force of the output shaft of the actuator to the other end portion of the insulation operation rod.
The gas circuit breaker according to claim 1, wherein the seal rod is configured so as to keep airtightness of the penetrating portion.   The gas circuit breaker of Claim 1 which has a mechanism box attached to the exterior of the said container and in which the said operation mechanism is accommodated.   The gas circuit breaker according to claim 3, wherein at least one surface of the mechanism box is detachable.   The gas circuit breaker according to claim 3, wherein the operation mechanism and the mechanism box are fixed.   The gas circuit breaker according to claim 3, wherein the mechanism box and the installation base are fixed.   The gas circuit breaker according to claim 1, wherein a central axis of the insulating operation rod is substantially parallel to an installation foundation. The container has a coupling portion through which a main circuit portion connected to the first contact portion passes,
The gas circuit breaker according to claim 1, wherein a central axis of the coupling portion and a central axis of the insulating operation rod are substantially parallel. The gas circuit breaker according to any one of claims 1 to 8,
A gas circuit breaker in which at least adjacent containers are fixed among the gas circuit breakers arranged in a plurality.

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