KR102656515B1 - Gas insulated switchgear - Google Patents

Abstract

The present invention relates to a gas insulated switchgear.
A gas insulated switchgear according to an embodiment of the present invention includes an enclosure having an accommodating space; a fixed contact fixed to the accommodating space; and a movable contact provided to contact or release the fixed contact in the accommodating space. ; and a fixed conductor unit supporting the fixed contact point in the receiving space, wherein the fixed conductor unit includes a fixed conductor fixed to the enclosure; and connected to the fixed conductor and the fixed contact point, and maintaining a predetermined angle with each other. A plurality of joint members interconnected to form a plurality of joint members; and a plurality of fastening members that penetrate the plurality of joint members and couple the plurality of joint members. The angle formed by the plurality of joint members may be adjusted.

Description

Gas insulated switchgear {GAS INSULATED SWITCHGEAR}

The present invention relates to a gas insulated switchgear.

Gas Insulated Switchgear (GIS) is installed on electric lines for indoor and outdoor power plants and substations to not only artificially open and close load currents under normal use conditions, but also to detect abnormal currents such as accidents or short circuits. It is a switch in the ultra-high voltage power system that safely blocks the current to protect the power system and power equipment.

Gas insulated switchgear is a circuit breaker (CB), disconnector (DS), current transformer (CT), and earthing switch (ES) inside a tank filled with single or mixed gases such as SF6, C4F7N, CO2, N2, and O2. It can be equipped with switching facilities and a main bus.

A disconnecting switch can be used not only to open and close a transmission line when there is no load, but also to disconnect and connect a certain circuit, and to separate the line from the power source for maintenance and inspection of the line.

This disconnector may be comprised of a main body, a stator installed inside the main body, and a mover movable to connect, neutral, or separate positions with respect to the stator.

A number of conductors can be used to install the disconnector components inside the tank of the gas insulated switchgear. The conductor not only supports the disconnector components but also contributes to the current conduction and insulation performance of the gas insulated switchgear.

Since these conductors are usually manufactured as a single piece through casting, there is a problem that it is difficult to change the shape once manufactured, and there is a problem that compatibility with various gas insulated switchgear or disconnectors is poor.

KR 10-2003-0061562 A (2003.07.22)

One purpose of the present invention is to improve the design efficiency and assembly efficiency of gas insulated switchgear.

Another object of the present invention is to improve the durability of gas insulated switchgear.

A gas insulated switchgear according to an embodiment of the present invention includes an enclosure having an accommodation space; A fixed contact point fixed to the receiving space; a movable contact point provided to contact or release the fixed contact point in the accommodation space; and a fixed conductor unit supporting the fixed contact point in the receiving space, wherein the fixed conductor unit includes: a fixed conductor fixed to the enclosure via an insulating spacer; A plurality of joint members connected to the fixed conductor and the fixed contact point and interconnected to form a predetermined angle with each other; and a plurality of fastening members that penetrate the plurality of joint members and couple the plurality of joint members, and the angle formed by the plurality of joint members may be adjusted.

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In addition, in one embodiment, the plurality of joint members includes: a first joint member connected to the fixed contact point; and a second joint member connected to the first joint member and forming a predetermined angle with the first joint member. ; and, a third joint member connected to the second joint member; and a fourth joint member connected to the third joint member to form a predetermined angle with the third joint member and fixed to the fixed conductor; It includes, and the plurality of fastening members include: a first fastening member penetrating the first joint member and the second joint member; and a second fastening member penetrating the third joint member and the fourth joint member.

Additionally, in one embodiment, the first joint member includes: a first flange area facing the fixed contact point and including at least one first through hole; and a first body region including a first connection hole facing the second joint member, wherein the second joint member includes a second body including a second connection hole facing the first connection hole. area; and a second flange region facing the third joint member and including at least one second through hole, wherein the third joint member includes a third through hole facing the second through hole. a third flange area; and a third body region including a third connection hole facing the fourth joint member, wherein the fourth joint member includes a fourth body including a fourth connection hole facing the third connection hole. area; and a fourth flange region including a fourth through hole facing the fixed conductor.

Additionally, in one embodiment, the first fastening member is inserted into the first connection hole and the second connection hole so as not to be exposed to the outside of the first joint member and the second joint member, and the second fastening member is , It may be inserted into the third connection hole and the fourth connection hole so as not to be exposed to the outside of the third joint member and the fourth joint member.

In addition, in one embodiment, the first body region includes a first concave groove formed concavely in the thickness direction, and the second body region includes a first protrusion inserted into the first concave groove. The third body region may include a second concave groove formed concavely in the thickness direction, and the fourth body region may include a second protrusion inserted into the second concave groove.

Additionally, in one embodiment, the plurality of joint members may have at least a portion of the edges rounded.

Additionally, in one embodiment, the plurality of joint members may be connected to each other by at least one intermediate connection conductor.

According to the present invention, the design efficiency and assembly efficiency of gas insulated switchgear can be improved.

Additionally, according to the present invention, the durability of the gas insulated switchgear can be improved.

1 is a front cross-sectional view of a gas insulated switchgear according to an embodiment of the present invention.
Figure 2 is a side cross-sectional view of a gas insulated switchgear according to an embodiment of the present invention.
Figure 3 is an exploded perspective view of area A of Figure 2.
Figure 4 is a perspective view of a first joint member according to an embodiment of the present invention.
Figure 5 is a perspective view of a second joint member according to an embodiment of the present invention.
Figure 6 is a perspective view of a third joint member according to an embodiment of the present invention.
Figure 7 is a perspective view of a fourth joint member according to an embodiment of the present invention.
Figure 8 is an exploded perspective view of the third joint member and the fourth joint member according to another embodiment of the present invention.
FIG. 9 shows A', which is another example of area A of FIG. 2.
FIG. 10 shows A'', which is another example of area A of FIG. 2.

In order to facilitate understanding of the description of the embodiments of the present invention, elements written with the same symbols in the attached drawings are the same elements, and among the components that perform the same function in each embodiment, related components are numbered on the same or extended lines. Notated.

In addition, in order to clarify the gist of the present invention, descriptions of elements and techniques well known in the prior art will be omitted, and the present invention will be described in detail below with reference to the attached drawings.

However, the idea of the present invention is not limited to the presented embodiments, and other forms in which specific components are added, changed, or deleted may be proposed by those skilled in the art, but this is also included within the scope of the same idea as the present invention. reveal.

1 is a front cross-sectional view of a gas insulated switchgear according to an embodiment of the present invention.

As shown in FIG. 1, the gas insulated switchgear according to an embodiment of the present invention may include an enclosure 110 having an accommodation space 111.

The enclosure 110 is made of a material containing metal and can be sealed, and the receiving space 111 can be filled with gas such as SF6, C4F7N, CO2, N2, and O2. The accommodation space 111 may be equipped with switching equipment such as a circuit breaker (CB), a disconnector (DS), a current transformer (CT), and an earthing switch (ES), as well as a main bus. Figure 1 schematically shows the disconnector area.

As shown in Figure 1, a fixed contact point 120 may be provided on one side of the receiving space 111. The fixed contact point 120 may be supported and fixed by the fixed conductor unit 140 fixed to the enclosure 110.

A movable contact point 131 may be provided at the top of the fixed contact point 120 in the +Y direction. The movable contact point 131 may be spaced a certain distance away from the fixed contact point 120. The movable contact 131 may be supported by a movable contact drive unit 132 provided in the receiving space 111, and moves in the direction of the fixed contact 120 by the operation of the movable contact drive unit 132 to form a fixed contact point. It may be in contact with (120) or may be released from the fixed contact point (120) by moving in a direction away from the fixed contact point (120).

The movable contact drive unit 132 may include an actuator (not shown) that provides driving force and a plurality of link members connected to the actuator (not shown). However, this is not necessarily limited by the present invention, and if the movable contact point 131 can be moved, the components of the movable contact drive unit can be appropriately selected and applied by those skilled in the art.

The fixed conductor unit 140 is connected to a fixed conductor 141 fixed to the enclosure 110 via an insulating spacer 112 (see FIG. 2), and the fixed conductor 141 and the fixed contact point 120. , a plurality of joint members 142 interconnected to form a predetermined angle with each other, and a plurality of fastening members 143 that penetrate the plurality of joint members 142 and couple the plurality of joint members 142. can do.

At this time, the angle formed by the plurality of joint members 142, that is, the pair of joint members 142, may be provided to be adjustable. In one embodiment of the present invention, the angle formed by the pair of joint members 142 may be any one of an acute angle, a right angle, an obtuse angle, and a straight angle.

The present invention provides the ability to adjust the angle formed by the pair of joint members 142, after separating the fastening member combining the pair of joint members 142 from the joint member 142. This can be achieved by changing the angle formed by the pair of joint members 142 and then fastening the fastening member to the pair of joint members 142 again to fix the pair of joint members 142. .

According to this, there is no need to replace the fixed conductor unit 140 every time the specifications of the gas insulated switchgear change, and only one fixed conductor unit 140 can respond to various specifications of the gas insulated switchgear.

Therefore, compatibility between the fixed conductor unit 140 and the gas insulated switchgear can be improved, and the design efficiency and assembly efficiency of the gas insulated switchgear can be improved.

In one embodiment of the present invention, the fixed conductor 141 includes a first fixed conductor 141a fixed to one side of the enclosure 110, and a second fixed conductor (141a) spaced a certain distance away from the first fixed conductor in the enclosure 110. 141b), the enclosure 110 may include a third fixed conductor 141c spaced a certain distance away from the second fixed conductor.

One joint member 142 may be fixed to the first, second, and third fixed conductors 141a, 141b, and 141c, respectively. Another plurality of joint members 142 may be respectively fixed to the joint member 142. At this time, the joint members 142 may be connected to each other by fastening members. The number of joint members 142 employed is not necessarily limited by the present invention, and can be appropriately selected and applied depending on the specifications of the gas insulated switchgear, etc., and the initial angle formed by the pair of joint members 142 is also gas insulated. It can be appropriately selected and applied depending on the specifications of the switchgear. Additionally, among the plurality of joint members 142, the angles formed by a pair of joint members 142 may be different from each other.

A fixed contact point 120 may be connected to one side of the joint member 142. As described above, the fixed contact point 120 may face the movable contact point, and may be provided in plural numbers and connected to each of the plurality of joint members 142.

Figure 2 is a side cross-sectional view of a gas insulated switchgear according to an embodiment of the present invention.

As shown in FIG. 2, the enclosure 110 of the gas insulated switchgear according to an embodiment of the present invention may be provided with an insulating spacer 112.

Additionally, the gas insulated switchgear according to an embodiment of the present invention may include a first movable contact (131a), a second movable contact (131b), and a third movable contact (131c). A driving link member 133 may be connected to each of the first, second, and third movable contact points 131a, 131b, and 131c, and the driving link member 133 may be connected to the driving rod 134. An actuator (not shown) may be connected to the drive rod 134, and as the drive link member 133 rotates according to the operation of the actuator (not shown), the first, second, and third movable contact points 131a, 131b, and 131c are connected. can be moved.

A first fixed contact point (131a), a second fixed contact point (131b), and a third fixed contact point (131c) may face each of the first, second, and third movable contact points (131a, 131b, and 131c).

Taking the third fixed conductor as an example, one side of the third fixed conductor may be fixed to the enclosure 110, and the other side may extend in the +Y direction.

One joint member 142 may be connected to the other side of the third fixed conductor, and another joint member 142 may be connected to the joint member 142. At this time, the pair of joint members 142 may be fixed to maintain the second angle θ2 by a fastening member penetrating the pair of joint members 142 while forming the second angle θ2. there is.

Another joint member 142 may be connected to the upper part of one joint member 142, and in this case, the joint members 142 may form a flat angle with each other. Next, another joint member 142 is connected to the joint member 142, and the pair of joint members 142 penetrates the pair of joint members 142 while forming a first angle θ1. It can be fixed to maintain the first angle θ1 by a fastening member. A third fixed contact point 120c may be connected to the upper part of the joint member 142.

In one embodiment of the present invention, the first angle θ1 and the second angle θ2 may be obtuse angles. According to this, the fixed conductor (141 in FIG. 1) and the fixed contact point (120 in FIG. 1) can be efficiently spaced from the inner surface of the enclosure 110 while preventing the size of the enclosure 110 from becoming larger than necessary. If the fixed conductor (141 in FIG. 1) and the fixed contact point (120 in FIG. 1) are spaced an appropriate distance away from the inner surface of the enclosure 110, the insulation durability of the fixed conductor (141 in FIG. 1) and the fixed contact point (120 in FIG. 1) can be increased. It can contribute to improvement. This can also contribute to improving the durability of gas insulated switchgear.

The remaining fixed conductors (141 in FIG. 1) and the plurality of joint members 142 may also be connected according to the same principle as above.

Figure 3 is an exploded perspective view of area A of Figure 2.

As shown in FIG. 3, the gas insulated switchgear according to an embodiment of the present invention includes a first joint member 142a connected to the second fixed contact point 120b, connected to the first joint member 142a, and the first joint member 142a. 1 A second joint member (142b) forming an obtuse angle with the joint member (142a), a third joint member (142c) connected to the second joint member (142b) to form a flat angle with the second joint member (142b) , It may include a fourth joint member (142d) connected to the third joint member (142c) to form an obtuse angle with the third joint member (142c) and fixed to the fixed conductor.

The plurality of fastening members 143 include a first fastening member 143a penetrating the first joint member 142a and the second joint member 142b, the third joint member 142c, and the fourth joint member. It may include a second fastening member 143b penetrating (142d). In one embodiment of the present invention, the first fastening member and the second fastening member may be provided with bolts, the first fastening member is fastened with a first fastening nut (143ab), and the second fastening member is fastened with a second fastening nut ( 143ba) can be fastened to improve fixing force.

Figure 4 is a perspective view of the first joint member 142a according to an embodiment of the present invention, Figure 5 is a perspective view of the second joint member 142b according to an embodiment of the present invention, and Figure 6 is a perspective view of the first joint member 142b according to an embodiment of the present invention. This is a perspective view of the third joint member 142c according to an embodiment, and Figure 7 is a perspective view of the fourth joint member 142d according to an embodiment of the present invention.

As shown in Figures 2 to 7, in one embodiment of the present invention, the first joint member (142a) faces the second fixed contact point and includes a first flange region (151a) including at least one first through hole (144a). ) and a first body region 151b including a first connection hole 144b facing the second joint member 142b.

The first through hole may face a plurality of coupling holes 122 provided in the second fixed contact, and the first fixing member 121 is fastened to the first through hole and the coupling hole 122 to form the first fixing member 121. The joint member 142a and the second fixed contact point may be connected to each other.

The second joint member 142b faces the third joint member 142c and the second body region 152a including the second connection hole 145a facing the first connection hole 144b, at least It may include a second flange area (152b) including one or more second through holes (145b).

A first fastening member may be inserted into the first through hole 144a and the second connection hole 145a.

The third joint member 142c has a third flange area 153a including a third through hole 146a facing the second through hole and a third connection hole facing the fourth joint member 142d ( It may include a third body region 153b including 146b). A second fixing member 171 may be inserted into the second through hole 145b and the third through hole 146a, and a second fixing nut 172 may be fastened to the second fixing member 171. .

The fourth joint member 142d includes a fourth body region 154a including a fourth connection hole 147a facing the third connection hole and a fourth through hole 147b facing the fixed conductor. It may include a fourth flange area (154b).

A second fastening member 143b may be inserted into the third connection hole 146b and the fourth connection hole 147a, and a second fastening nut 143ba may be fastened to the second fastening member 143b.

The fourth through hole 147b may face the plurality of fixed conductor coupling holes 141a formed in the fixed conductor. A third fixing member 141b may be fastened to the fourth through hole 147b and the fixed conductor coupling hole 141a.

This structure can be applied to the first fixed contact point (120a in FIG. 2) and the third fixed contact point (120c in FIG. 2) according to the same principle.

In addition, to change the angle formed by the first joint member (142a) and the second joint member (142b), separate the first fastening member (143a) and the first fastening nut (143ab) and then separate the first joint member (142a). ) and the angle formed by the second joint member 142b can be changed. And the first fastening member 143a and the first fastening nut 143ab can be fastened again so that the first joint member 142a and the second joint member 142b are fixed while maintaining the changed angle. This can be applied on the same principle to the third joint member 142c and the fourth joint member 142d.

In one embodiment of the present invention, the first fastening member is provided with the first connection hole 144b and the second connection hole ( 145a). In addition, the second fastening member 143b is also connected to the third connection hole 146b and the fourth connection hole 147a so that it is not exposed to the outside of the third joint member 142c and the fourth joint member 142d. can be inserted.

Accordingly, it is possible to prevent electric fields from being concentrated on the first fastening member and the second fastening member, and the insulation durability of the components constituting the gas insulated switchgear can be improved.

Meanwhile, as shown in FIG. 4, the first body region 151b of the first joint member 142a may include a first concave groove 161 that is concavely formed in the thickness direction (-X direction). The first connection hole 144b may exist inside the first concave groove 161.

Additionally, at least one edge (L) of the plurality of edges (L) of the first joint member (142a) may be rounded. According to this, the electric field concentration on the first joint member 142a can be minimized.

As shown in FIG. 5, the second body region 152a of the second joint member 142b may include a first protrusion 162 protruding in the thickness direction (+X direction). The first protrusion 162 may be provided in a shape corresponding to the first concave groove (161 in FIG. 4), and the first protrusion 162 may be inserted into the first concave groove (161 in FIG. 4). According to this, the first joint member (142a in FIG. 4) and the second joint member (142b) can be easily coupled, and assembly efficiency can be improved.

Additionally, at least one edge (L) of the plurality of edges (L) of the second joint member (142b) may be rounded. According to this, the electric field concentration on the second joint member 142b can be minimized.

As shown in FIG. 6, the third body region 153b of the third joint member 142c may include a second concave groove 163 that is concavely formed in the thickness direction (+X direction). The third connection hole 146b may exist inside the second concave groove 163.

Additionally, at least one edge (L) of the plurality of edges (L) of the third joint member (142c) may be rounded. According to this, the electric field concentration on the third joint member 142c can be minimized.

As shown in FIG. 7, the fourth body region 154a of the fourth joint member 142d may include a second protrusion 164 inserted into the second concave groove (163 in FIG. 6).

The second protrusion 164 may be provided in a shape corresponding to the second concave groove (163 in FIG. 6), and the second protrusion 164 may be inserted into the second concave groove (163 in FIG. 6). According to this, the third joint member (142c in FIG. 6) and the fourth joint member (142d) can be easily combined and assembly efficiency can be improved.

Additionally, at least one edge (L) of the plurality of edges (L) of the fourth joint member (142d) may be rounded. According to this, the electric field concentration on the fourth joint member 142d can be minimized.

In one embodiment of the present invention, the joint member (142 in FIG. 3) may be made of a metal material such as steel or aluminum. However, this is not necessarily limited by the present invention and can be appropriately selected and applied by those skilled in the art.

Figure 8 is an exploded perspective view of the third joint member 142c and the fourth joint member 142d according to another embodiment of the present invention.

As shown in FIG. 8, the third joint member 142c may include a plurality of joint member coupling holes 146ba disposed outside the outer periphery of the third connection hole. In addition, the fourth joint member (142d) faces the joint member coupling hole (146ba) and may be provided with a plurality of another joint member coupling hole (147ab) disposed outside the outer periphery of the fourth connection hole (147a). You can.

In one embodiment of the present invention, the joint member coupling holes 146ba and 147ab may be present inside the second concave groove (163 in FIG. 6) and the second protrusion 164. The third joint member 142c and the fourth joint member 142d may be coupled to each other by a plurality of fourth fixing members 143ba penetrating the joint member coupling holes 146ba and 147ab. According to this, the assembly efficiency and coupling strength of the third joint member 142c and the fourth joint member 142d can be improved. However, of course, the above-described joint member coupling holes 146ba and 147ab may also exist outside the second concave groove (163 in FIG. 6) and the second protrusion 164.

FIG. 9 shows A', which is another example of area A of FIG. 2.

As shown in Figure 9, the first joint member 142a and the second joint member 142b may form a third angle θ3, and the second joint member 142b and the third joint member 142c may form a flat angle. , and the third joint member 142c and the fourth joint member 142d may form a fourth angle θ4.

The third angle θ3 and the fourth angle θ4 are angles different from the first angle θ1 and the second angle θ2 of FIG. 2, and the first joint member 142a and the second angle θ2 are formed by the above-described methods. The angle formed by the joint member 142b and the angle formed by the third joint member 142c and the fourth joint member 142d are changed.

In this way, the angle of the fixed conductor unit (140 in FIG. 1) can be applied to the enclosure (110 in FIG. 1) according to the requirements of the gas insulated switchgear. According to this, there is no need to replace the fixed conductor unit (140 in FIG. 1) every time the specifications of the gas insulated switchgear are changed, which can also contribute to reducing manufacturing costs.

FIG. 10 shows A'', which is another example of area A of FIG. 2.

As shown in FIG. 10, the second joint member 142b and the third joint member 142c may be connected to each other by at least one intermediate connection conductor 180. The intermediate connecting conductor may be made of the same material as the second joint member 142b and the third joint member 142c, and may include a plurality of joint member connecting holes 181.

The second fixing member 171 may be inserted into the joint member connection hole 181 and the third through hole 146a, and the fifth fixing member 173 may be inserted into the joint member connection hole 181 and the second through hole 146a. It can be inserted into the hole 145b.

According to the intermediate connecting conductor 180, the length of the second joint member 142b and the third joint member 142c can be extended, and if the intermediate connecting conductor 180 is appropriately used, the changing specifications of the gas insulated switchgear can be adjusted. You can respond more flexibly.

The matters described above are a description of one embodiment of the present invention, and the scope of the present invention is not limited thereto, and various modifications and variations are possible without departing from the technical spirit of the present invention as set forth in the claims. This will be self-evident to those with ordinary knowledge in the relevant technical field.

110: enclosure 111: accommodation space
120: Fixed contact 131: Movable contact
140: fixed conductor unit 141: fixed conductor
142: joint member 143: fastening member

Claims (7)

An enclosure having a receiving space;
A fixed contact point fixed to the receiving space;
a movable contact point provided to contact or release the fixed contact point in the accommodation space; and
A fixed conductor unit supporting the fixed contact point in the receiving space.
Including,
The fixed conductor unit is,
A fixed conductor fixed to the enclosure via an insulating spacer;
A plurality of joint members connected to the fixed conductor and the fixed contact point and interconnected to form a predetermined angle with each other; and
A plurality of fastening members that penetrate the plurality of joint members and couple the plurality of joint members.
Including,
A gas insulated switchgear provided so that the angle formed by the plurality of joint members is adjusted.
According to paragraph 1,
The plurality of joint members,
a first joint member connected to the fixed contact point;
a second joint member connected to the first joint member and forming a predetermined angle with the first joint member;
a third joint member connected to the second joint member;
It includes a fourth joint member connected to the third joint member to form a predetermined angle with the third joint member and fixed to the fixed conductor,
The plurality of fastening members are,
a first fastening member penetrating the first joint member and the second joint member; and
A gas insulated switchgear including a second fastening member penetrating the third joint member and the fourth joint member.
According to paragraph 2,
The first joint member,
a first flange area facing the fixed contact point and including at least one first through hole; and
A first body region including a first connection hole facing the second joint member,
The second joint member,
a second body region including a second connection hole facing the first connection hole; and
A second flange area faces the third joint member and includes at least one second through hole,
The third joint member,
a third flange area including a third through hole facing the second through hole; and
A third body region including a third connection hole facing the fourth joint member,
The fourth joint member,
a fourth body region including a fourth connection hole facing the third connection hole; and
A gas insulated switchgear including a fourth flange area including a fourth through hole facing the fixed conductor.
According to paragraph 3,
The first fastening member is,
It is inserted into the first connection hole and the second connection hole so that the first joint member and the second joint member are not exposed to the outside,
The second fastening member is,
A gas insulated switchgear inserted into the third connection hole and the fourth connection hole so as not to be exposed to the outside of the third joint member and the fourth joint member.
According to paragraph 4,
The first body region is,
It includes a first concave groove formed concavely in the thickness direction,
The second body region is,
It includes a first protrusion inserted into the first concave groove,
The third body region is,
It includes a second concave groove formed concavely in the thickness direction,
The fourth body region is,
A gas insulated switchgear including a second protrusion inserted into the second concave groove.
According to paragraph 1,
The plurality of joint members,
A gas insulated switchgear with at least some areas of the edges rounded.
According to paragraph 1,
The plurality of joint members,
Gas insulated switchgear interconnected by at least one intermediate connecting conductor.

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