JPH0963425A - Gas insulated switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent speed reduction of opening and closing operation by providing a guide for covering the inside surface of the metal vessel of a sealed case and also supporting a drive shaft in such a manner as to be slidable. SOLUTION: A guide 22 is formed to cover the inside surface of the metal vessel 1 of a sealed case 18, and one end thereof is fixed to a partitioning wall 2. According to such a constitution, a fluoride 21, even when diffused in opening operation, can be prevented from penetrating into the sealed case 18, and the generation of bending force to a drive shaft 16 can be prevented, whereby the increase in frictional force can be suppressed to prevent opening and closing speed reduction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switch capable of preventing a reduction in switching operation speed.

[0002]

2. Description of the Related Art FIG. 6 is a partial sectional view showing the structure of a conventional gas-insulated switch shown in Japanese Utility Model Laid-Open No. 63-89647. In the figure, 1 is a metal container, 2 is a partition wall, 3
Is a support stand placed in the metal container 1 and fixed to the partition wall 2, 4 is an insulating support tube fixed to the support stand 3, 5 is a frame fixed to the insulating support tube 4, and 6 is a frame 5 sliding Movably supported puffer cylinder movable portion, 7 is a movable contactor housed in the puffer cylinder movable portion 6, 8 is a fixed contactor arranged so as to be able to contact and separate from the movable contactor 7, and 9 is provided in the frame 5. The lever 10 arranged is a support shaft for supporting the lever 9 tiltably on the frame 5, 11 is a lever, one end of which is tiltably connected by the puffer cylinder movable portion 6 and the pin 12, and the other end of which is the lever 9 and the pin. It is connected by 12 so that it can be tilted.

Reference numeral 13 is an insulating rod, one end of which is connected by a pin 14 to the center of the lever 11 so as to be tiltable. Then, in 9 to 14, the link mechanism 15 for operating the puffer cylinder 6 with the insulating rod 13 is formed. Reference numeral 16 denotes a drive shaft, one end of which is disposed in the insulating rod 13 penetrating the partition wall 2 and the other end of which is connected to a drive operation mechanism (not shown). Reference numeral 17 is a pin that connects the insulating rod 13 and the drive shaft 16, and forms a connecting portion. A seal case 18 is attached to the partition wall 2 and has a sealing member.
Is slidably supported and an insulating gas 19 described later is sealed. Reference numeral 19 is an insulating gas such as SF6 filled in the metal container 1, 20 is an arc generated between the movable contact 7 and the fixed contact 8, and 21 is a fluoride generated from the insulating gas 19.

Next, the operation will be described. When the drive shaft 16 is driven leftward in the figure by the drive operation mechanism in which the gas insulated switch is arranged in the air to start the contact opening operation, the levers 9 and 11 of the link mechanism 15 move counterclockwise. It tilts and the puffer cylinder moving part 6 is moved through the lever 11.
The movable contact 7 moves to the left in the figure, and the movable contact 7 separates from the fixed contact 8. At this time, an arc 20 is generated between the contacts 7 and 8, and the arc 20 is extinguished by the gas flow generated by the frame 5 and the puffer cylinder movable portion 6. Here, the arc 20 generated between each of the contacts 7 and 8 exposes the surrounding insulating gas 19 to generate a fluoride 21, and the fluoride 21 is diffused into the metal container 1.

On the other hand, when the drive shaft 16 and the insulating rod 13 are closed to drive them to the right in the figure, the levers 9 and 11 of the link mechanism 15 tilt clockwise and the lever 1
The puffer cylinder movable part 6 connected to 1 moves to the right in the figure, and the movable contact 7 comes into contact with the fixed contact 8 to close the electrode.

[0006]

Since the conventional gas-insulated switch is constructed as described above, the fluoride 21 generated during the opening operation invades the seal case 17 and the drive shaft 16. Since the frictional force is increased, there is a problem that the opening / closing operation speed is reduced. Insulating rod 1
Since the lever 11 connected to 3 moves in an arc during the opening / closing operation, the drive shaft 16 performs a linear sliding operation while receiving a bending force from the insulating rod 13, resulting in an increase in frictional force.
There is a problem that the opening / closing operation speed is reduced.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a gas-insulated switch which can prevent a decrease in switching operation speed.

[0008]

A gas-insulated switch according to claim 1 of the present invention comprises a guide for covering the inner surface of the metal case of the seal case and slidably supporting the drive shaft.

Further, according to a second aspect of the present invention, a gas-insulated switch is provided with a cylindrical guide surrounding the inside of the metal case of the seal case, and slidable in the axial direction of the drive shaft and the inner peripheral surface of the guide. It is provided with a sliding member that is arranged and supports the drive shaft at the central portion.

Further, according to a third aspect of the present invention, there is provided a gas-insulated switch, which is a cylindrical guide surrounding the inside of the metal case of the seal case, and is slidable in the axial direction of the drive shaft and the inner peripheral surface of the guide. The sliding member is provided with one end connected to the drive shaft and the other end connected to the other end of the insulating rod.

The gas insulated switch according to a fourth aspect of the present invention is the gas insulated switch according to the second or third aspect, wherein the sliding member is made of a different material having a hardness lower than that of the guide.

A gas-insulated switch according to a fifth aspect of the present invention is the gas insulated switch according to the fourth aspect, wherein the sliding member is made of fluororesin, the guide is made of aluminum, and the inner surface in contact with the sliding member is anodized. It was done.

A gas-insulated switch according to a sixth aspect of the present invention is a cylindrical guide that surrounds the inside of the metal case of the seal case, and is arranged in the guide and has one end connected to the drive shaft and the other end connected to the insulating rod. And a sliding member that is interposed between the inner periphery of the guide and the outer periphery of the coupling member to slidably retain the coupling member on the inner periphery of the guide.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1. Embodiment 1 of the present invention will be described below with reference to the drawings. 1 is a partial cross-sectional view showing the structure of a gas-insulated switch according to Embodiment 1 of the present invention. In the figure, 1 to 21 are the same as those of the conventional gas-insulated switch, and therefore the description thereof is omitted. Reference numeral 22 denotes a guide that is configured to cover the inner surface of the metal case 1 of the seal case 18 and has one end fixed to the partition wall 2, and a circular cross section that slidably supports the drive shaft 16 at the center portion on the other end side. An arc-shaped support portion 23 is formed.

Next, the operation will be described. In the figure,
When the drive shaft 16 is driven leftward by the drive operation mechanism to perform the opening operation, the movable contact 7 is fixed to the fixed contact 8.
And separate. At this time, the generated arc 20 and the fluoride 21 generated by the insulating gas 19 are diffused in the metal container 1, but the seal case 18 is divided into the partition wall 2 and the guide 2.
Since it is covered with the support 2 and the support portion 23 for a predetermined length, the footwear 21 is prevented from entering the seal case 18.
Further, since the drive shaft 16 is slidably supported by the seal case 18 and the guide 22, the connecting portion 17 between the insulating rod 13 and the drive shaft 16 is provided at the connecting portion 17 between the insulating rod 13 and the drive shaft 16 by the arc movement of the lever 11 in the link mechanism 15 in the figure. Even if the bending force Fa shown by is applied, the bending force is prevented from being generated in the drive shaft 16 by opposing the bending force by the guide 22.

As described above, according to the first embodiment, since the guide 22 that covers the inner surface of the metal case 1 of the seal case 18 and slidably supports the drive shaft 16 is provided, the opening operation is performed. Even if the fluoride 21 is sometimes diffused, it is prevented from invading the seal case 18 and the bending force applied to the drive shaft 16 is prevented, thereby suppressing an increase in frictional force and a decrease in opening / closing speed. It becomes possible to do.

Embodiment 2. 2 is a partial sectional view showing the structure of a gas insulated switchgear according to Embodiment 2 of the present invention. In the figure, reference numerals 1 to 15 and 17 to 21 are the same as those of the conventional gas-insulated switch, and therefore the description thereof is omitted. 24 is a drive shaft which is supported by penetrating the seal case 18 and protrudes into the metal container 1. 25 is a connecting shaft whose one end is connected to the insulating rod 13 by the pin 17 and the other end is one end of the drive shaft 24. It is screwed on. Reference numeral 26 denotes a plate-shaped sliding member that has a predetermined diameter facing the seal case 18 and is screwed to the drive shaft 24. Reference numeral 27 denotes a sliding portion formed on an outer peripheral portion and having an arcuate cross section. 28 denotes a drive shaft. A nut for fixing 15 and the connecting shaft 25, 29 has one end fixed to the partition wall 2 and the seal case 18
This is a cylindrical guide that surrounds the inside of the metal container 1 and the other end slidably supports the sliding member 26 via the sliding portion 27 at the inner peripheral surface.

Next, the operation will be described. In the figure,
When the drive operation mechanism performs the opening operation in which the drive shaft 24 is driven to the left, the movable contact 7 is fixed to the fixed contact 8.
And separate. At this time, the generated arc 20 and the fluoride 21 generated by the insulating gas 19 are diffused in the metal container 1, but the seal case 18 is divided into the partition wall 2 and the guide 2.
9 and the sliding member 26, the fluoride 21
Are prevented from entering the seal case 18. Also,
Since the drive shaft 24 is supported by the guide 29 via the seal case 18 and the sliding member 26, the lever 17 in the link mechanism 15 is connected to the connecting portion 17 between the insulating rod 13 and the drive shaft 24.
Even if the bending force Fa indicated by the arrow in the figure due to the circular arc motion of No. 1 is applied, the bending force is prevented by the guide 29 by opposing the bending force.

As described above, according to the second embodiment, even if the fluoride 21 diffuses during the opening operation, the fluoride 21 is prevented from entering the seal case 18, and the bending force applied to the drive shaft 24 is not generated. By preventing it, it becomes possible to suppress an increase in frictional force and prevent a decrease in opening / closing speed.

Embodiment 3 3 is a partial cross-sectional view showing the structure of a gas insulated switch according to a third embodiment of the present invention. In the figure, reference numerals 1 to 15 and 17 to 21 are the same as those of the conventional gas-insulated switch, and therefore the description thereof is omitted. Reference numeral 30 denotes a drive shaft that is supported by the seal case 18 and projects into the metal container 1 by a predetermined length, and has a screw portion 31 formed at one end side. Reference numeral 32 is a sliding member connected to the drive shaft 30 by a screw portion 31, and one end side is formed with a predetermined outer diameter having an inner diameter that forms a predetermined distance from the outer diameter of the insulating rod 13. Reference numeral 33 is a nut for fixing the drive shaft 30 and the connecting member 32. The insulating rod 13 and the connecting member 32 are connected by the pin 17, so that the insulating rod 13 and the drive shaft 30 are connected via the sliding member 32. Reference numeral 34 denotes a cylindrical guide whose one end is fixed to the partition wall 2 and surrounds the inside of the metal case 1 of the seal case 18, and the inner diameter slidably supports the sliding member 32.

Next, the operation will be described. In the figure,
When the driving operation mechanism performs the opening operation in which the drive shaft 30 is driven to the left, the movable contact 7 is fixed to the fixed contact 8.
And separate. At this time, the arc 21 generated and the fluoride 21 generated by the insulating gas 19 are diffused in the metal container 1, but the seal case 18 is divided into the partition wall 2 and the guide 3.
4 and the sliding member 32, the fluoride 21
Are prevented from entering the seal case 18. Also,
Since the drive shaft 30 is supported by the seal case 18 and the guide 34 via the sliding member 32, the pin 17 forming the connecting portion between the insulating rod 13 and the drive shaft 30 is connected to the pin 17 forming the linking mechanism 15 of the lever 11 of the link mechanism 15. Even if the bending force Fa due to the arc motion is applied, the guide 34 opposes the bending force,
The bending force of the drive shaft 30 is prevented.

As described above, according to the third embodiment, even if the fluoride 21 diffuses during the opening operation, the fluoride 21 is prevented from entering the seal case 18, and the bending force applied to the drive shaft 30 is not generated. By preventing the increase, the increase of the frictional force is suppressed and the decrease of the opening / closing speed is prevented.

Embodiment 4 Although the materials of the guide 29 and the sliding member 26 in the second embodiment, the guide 33 and the sliding member 32 in the third embodiment are not described, the sliding member on the movable side has a lower hardness than the guide. When it is made of a material, it is possible to prevent the occurrence of image sticking during the opening / closing operation.

Embodiment 5 The guides 29 and 33 in the above-described second and third embodiments are made of aluminum alloy, and the inner peripheral surface contacting the sliding members 26 and 32 is anodized. When the sliding members 26 and 32 are made of fluororesin to reduce mutual friction, it is possible to prevent seizure from occurring during opening / closing operations. The materials of the fixed-side member and the movable-side member are not limited to the above, and it is sufficient to select a material that can reduce friction and prevent seizure.

Embodiment 6 FIG. FIG. 4A is a partial cross-sectional view showing the structure of a gas insulated switch according to Embodiment 6 of the present invention, and FIG. 4B is an enlarged view of part A in FIG. 4A.
In the figure, 1 to 15 and 17 to 21 are the same as those of the conventional gas-insulated switch, and 30, 31, 33 and 34 are the same as those of FIG. . Reference numeral 35 denotes a connecting member that is connected to the drive shaft 30 by a screw portion 31 and has an inner diameter on one end side that fits with the outer diameter of the insulating rod 13 and has a predetermined outer diameter smaller than the inner diameter of the guide 34. Reference numeral 36 denotes a plurality of grooves formed at a predetermined interval on the outer diameter portion of the connecting member 35, and 37 denotes an annular packing made of fluororesin mounted in each groove 36, the outer periphery of which can slide on the inner surface of the guide 34. Are in contact.

Next, the operation will be described. In the figure,
When the driving operation mechanism performs the opening operation in which the drive shaft 30 is driven to the left, the movable contact 7 is fixed to the fixed contact 8.
And separate. At this time, the arc 21 generated and the fluoride 21 generated by the insulating gas 19 are diffused in the metal container 1, but the seal case 18 is divided into the partition wall 2 and the guide 3.
4 and the sliding member 37 are covered by the connecting member 35, and the packing 36 is interposed between the guide 34 and the connecting member 35, so that the fluoride 21 does not enter the seal case 18. Prevent. Further, since the drive shaft 30 is supported by the guide 34 through the seal case 18 and the sliding member 37 attached to the connecting member 35, the pin 17 forming the connecting portion between the insulating rod 13 and the drive shaft 30.
In addition, even if a bending force Fa indicated by an arrow in the drawing is applied by the arc movement of the lever 11 in the link mechanism 15, the guide shaft 34 prevents the bending force from being generated by the guide shaft 34 against the bending force.

As described above, according to the fifth embodiment, even if the fluoride 21 diffuses during the opening operation, the fluoride 21 is prevented from entering the seal case 18, and the bending force applied to the drive shaft 30 is generated. By preventing this, it becomes possible to suppress an increase in frictional force and prevent a decrease in opening / closing speed.

[0028]

As described above, according to the first aspect of the present invention, the guide is provided to cover the inner surface of the metal case of the seal case and slidably support the drive shaft. It is possible to obtain a gas-insulated switch that can prevent the deterioration.

According to a second aspect of the present invention, a cylindrical guide surrounding the inside of the metal case of the seal case,
Further, since the inner peripheral surface of the guide is arranged so as to be slidable in the axial direction of the drive shaft and the sliding member supporting the drive shaft at the central portion is provided, it is possible to prevent a decrease in the opening / closing speed. An insulating switch can be obtained.

According to claim 3 of the present invention, a cylindrical guide surrounding the inside of the metal case of the seal case,
Also, since the inner peripheral surface of the guide is arranged to be slidable in the axial direction of the drive shaft, and one end is connected to the drive shaft and the other end is connected to the other end side of the insulating rod, a sliding member is provided. It is possible to obtain a gas-insulated switch which can prevent the deterioration of

Further, according to claim 4 of the present invention, in claim 2 or 3, since the sliding member is made of a different material having a lower hardness than the guide, the opening / closing speed is prevented from being lowered, and the opening / closing speed is of course prevented. It is possible to obtain a gas-insulated switch that can prevent the occurrence of burn-in during operation.

According to a fifth aspect of the present invention, in the fourth aspect, since the sliding member is made of fluororesin, the guide is made of aluminum, and the inner surface is anodized, the opening / closing speed is It is possible to obtain a gas-insulated switch which can prevent the occurrence of seizure during the opening / closing operation as well as preventing the decrease.

According to claim 6 of the present invention, a cylindrical guide surrounding the inside of the metal case of the seal case,
A connecting member arranged in the guide, one end of which is connected to the drive shaft and the other end of which is connected to the other end of the insulating rod, and which is interposed between the inner surface of the guide and the outer periphery of the connecting member and slides the connecting member on the inner periphery of the guide. Since it is configured to include the sliding member that is movably held, it is possible to obtain a gas-insulated switch that can prevent a decrease in opening / closing speed.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing the structure of a gas insulated switch according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing the structure of a gas insulated switch according to a second embodiment of the present invention.

FIG. 3 is a partial sectional view showing the structure of a gas insulated switch according to a third embodiment of the present invention.

FIG. 4 is a partial cross-sectional view showing the structure of a gas insulated switch according to a fifth embodiment of the present invention.

FIG. 5 is a partial cross-sectional view showing the configuration of a conventional gas insulated switch.

[Explanation of symbols]

1 metal container, 2 partition walls, 3 support stand, 4 insulating support tube, 5 frame, 6 puffer cylinder moving part, 7
Movable contactor, 8 Fixed contactor, 9 Lever, 10
Support shaft, 11 lever, 12 pin, 13 insulating rod, 14 pin, 15 link mechanism, 16 drive shaft, 1
7 pins (connecting part), 18 seal case, 19 insulating gas, 20 arc, 21 fluoride, 22 guide,
23 support part, 24 drive shaft, 25 connecting shaft, 26 sliding member, 27 sliding part, 28 nut, 29 guide,
30 drive shaft, 31 screw part, 32 sliding member, 33
Nut, 34 guide, 35 connecting member, 36 groove, 3
7 Packing (sliding member).

Claims (6)

[Claims] 1. A metal container filled with an insulating gas and having a partition wall, an insulating rod arranged in the metal container and having one end connected to a movable contactor through a link mechanism, and arranged to penetrate the partition wall. A gas insulated switch having a drive shaft having one end connected to the other end of the insulating rod and the other end connected to a drive source, and a seal case mounted on the partition wall to support the drive shaft and seal the insulating gas. The gas-insulated switch according to claim 1, further comprising a guide that covers the inner surface of the metal case of the seal case and slidably supports the drive shaft. 2. A metal container having a partition wall filled with an insulating gas, an insulating rod arranged in the metal container and having one end connected to a movable contactor through a link mechanism, and arranged to penetrate the partition wall. A gas insulated switch having a drive shaft having one end connected to the other end of the insulating rod and the other end connected to a drive source, and a seal case mounted on the partition wall to support the drive shaft and seal the insulating gas. In, a cylindrical guide surrounding the inside of the metal case of the seal case, and a sliding member which is arranged slidably in the axial direction of the drive shaft and the inner peripheral surface of the guide and which supports the drive shaft in the central portion. A gas-insulated switch characterized by that. 3. A metal container having a partition wall filled with an insulating gas, an insulating rod arranged in the metal container and having one end connected to a movable contactor through a link mechanism, and arranged to penetrate the partition wall. A gas insulated switch having a drive shaft having one end connected to the other end of the insulating rod and the other end connected to a drive source, and a seal case mounted on the partition wall to support the drive shaft and seal the insulating gas. A cylindrical guide surrounding the inside of the metal case of the seal case, and an inner peripheral surface of the guide slidably arranged in the axial direction of the drive shaft, one end of which is the drive shaft and the other end of which is the other end of the insulating rod. A gas-insulated switch comprising a sliding member connected to the side. 4. The gas insulated switch according to claim 2, wherein the sliding member is made of a different material having a hardness lower than that of the guide. 5. The gas-insulated switch according to claim 4, wherein the sliding member is made of fluororesin, the guide is made of aluminum, and the inner surface in contact with the sliding member is anodized. 6. A metal container filled with an insulating gas and having a partition wall, an insulating rod arranged in the metal container and having one end connected to a movable contactor through a link mechanism, and arranged to penetrate the partition wall. A gas insulated switch having a drive shaft having one end connected to the other end of the insulating rod and the other end connected to a drive source, and a seal case mounted on the partition wall to support the drive shaft and seal the insulating gas. A cylindrical guide surrounding the inner periphery of the metal case of the seal case, a connecting member arranged in the guide and having one end connected to the drive shaft and the other end to the other end of the insulating rod, the inner periphery of the guide and the A gas-insulated switch, comprising: a sliding member that is interposed between the outer periphery of the connecting member and slidably holds the connecting member on the inner periphery of the guide.