JP7116225B1 - Horizontal two-point disconnector - Google Patents

Abstract

A horizontal two-point disconnector that can reduce the cost and reduces the contact area between a butt contact portion and a finger during opening and closing. A rotating insulator 3 is rotatably supported, and is attached to the top of the rotating insulator and is composed of a first plate arranged horizontally, the thickness direction of the first plate being arranged vertically, and the rotating insulator A butt contact portion 51 consisting of a second plate attached to both ends of the blade, the width direction of the second plate being arranged in the vertical direction, and a support insulator supported by both ends of the base. 4. It is attached to the top of the support insulator and consists of a third plate arranged in a horizontal direction. When the blade rotates, the butt contact portion slides from the side surface of the finger so that the thickness direction surface of the second plate of the butt contact portion contacts and separates from the width direction surface of the third plate of the finger. [Selection drawing] Fig. 1

Description

The present invention relates to a horizontal double-point disconnector.

The conventional horizontal two-point disconnector is composed of a three-column insulator structure consisting of left and right support insulators and a center rotary insulator. The fingers of the fixed contact portion of the support insulator are separated to open and close the electric circuit.

Further, the blade is thrown into the fixed contact portion while being twisted by a twisting mechanism arranged at the tip of the rotary insulator just before the blade is completely thrown. This twisting mechanism can reduce the device operating force and improve reliability.

JP-A-11-120870 JP-A-2000-251586

However, the conventional horizontal two-point cutting device with a twisting mechanism has a problem that the mechanical part for twisting the blade is complicated, and the part cost and assembly cost are high.

In addition, the twisting mechanism has over-specified the JEC standard value, and the cost and the advantage of the twisting mechanism are not well balanced. Therefore, there has been a demand for a horizontal two-point disconnector that satisfies the JEC standard values without using a twisting mechanism.

In addition, in the conventional horizontal two-point disconnector, since the contact area between the butt contact portion and the fingers is large when opening and closing, the operating force of the blade is increased.

SUMMARY OF THE INVENTION An object of the present invention is to provide a horizontal two-point disconnect switch that can reduce the cost and reduce the blade operating force by reducing the contact area between the butt contact portion and the fingers during opening and closing.

In order to solve the above-mentioned problems, the invention according to claim 1 comprises: a rotating insulator rotatably supported in the center of a base; The thickness direction of the first plate is arranged in the vertical direction, and consists of a blade that rotates with the rotating insulator, and a second plate attached to both ends of the blade, and the width direction of the second plate consists of a butt contact portion arranged in the vertical direction, support insulators supported on both ends of the base, and a third plate attached to the top of the support insulator and arranged in the horizontal direction; The thickness direction of the plate 3 is arranged in the vertical direction, and the butt contact portion is provided with a plurality of fingers with which the butt contact portion contacts and separates, and when the blade rotates, the butt contact portion slides from the side surface of the finger. The surface of the butt contact portion in the thickness direction of the second plate is in contact with and separates from the surface of the finger in the width direction of the third plate.

The invention of claim 2 is characterized in that the surface of the butt contact portion in the thickness direction of the second plate is made of silver graphite.

According to the third aspect of the invention, the butt contact portion is attached to the tip of the butt contact portion in the longitudinal direction and on the side of the blade via a connecting member, and slides from the side surface of the finger ahead of the butt contact portion to move the finger up and down. It is characterized by providing an arc contact that spreads out.

The invention of claim 4 is characterized in that each of the plurality of fingers is a linear finger.

The invention according to claim 5 is characterized in that the blade is composed of two upper and lower aluminum plates arranged with a predetermined distance therebetween.

According to a sixth aspect of the present invention, a stopper plate is provided in each of the plurality of fingers so as to maintain a contact state between the plurality of fingers and the butt contact portion when the blade or the plurality of fingers are displaced. It is characterized in that it is arranged close to the finger positioned at the extreme end.

According to a seventh aspect of the invention, an operation device has a first lever and a second lever connected to the first lever, and rotates the first lever and the second lever; and a device having a third lever connected to the second lever, a fourth lever connected to the third lever, and a fifth lever connected to the fourth lever, the third lever and a thrust portion that rotates the rotary insulator and the blade by rotating the fourth lever and the fifth lever, and the fourth lever is opposed to the fifth lever by approximately 180 degrees. and is arranged at a predetermined angle with respect to the third lever, and the length of the fourth lever is substantially the same as the length of the third lever.

According to the eighth aspect of the invention, the plurality of fingers are composed of an upper finger and a lower finger for separating contact with the arc contactor, and the upper finger has a first curved portion at its end. and said lower finger has a second curved portion at its end which is asymmetrical to said first curved portion, said arc contact initially contacting said first curved portion of said upper finger when made. It is characterized in that the first curved portion of the upper finger finally separates from the arc contact upon contacting the curved portion and opening.

The invention of claim 9 comprises a rotating insulator rotatably supported at the center of a base, a plate attached to the top of the rotating insulator and arranged in a horizontal direction, and a blade that rotates together with the rotating insulator, Butt contact portions attached to both ends of the blade, support insulators supported by both ends of the base, and contact and separation of the butt contact portions when the support insulators are attached and the blade rotates. a plurality of fingers, and the blade is composed of two upper and lower aluminum plates spaced apart by a predetermined distance.

The invention of claim 10 comprises a rotating insulator rotatably supported in the center of a base, a plate attached to the top of the rotating insulator and arranged in a horizontal direction, and a blade that rotates together with the rotating insulator, Butt contact portions attached to both ends of the blade, support insulators supported by both ends of the base, and contact and separation of the butt contact portions when the support insulators are attached and the blade rotates. and a plurality of fingers, wherein when the butt contact portion is put into the plurality of fingers and the blade or the plurality of fingers are displaced, the plurality of fingers and the butt contact portion are in contact with each other. A stopper plate is arranged close to the finger positioned at the extreme end of the plurality of fingers so as to maintain the position of the finger.

According to the first aspect of the invention, the cost can be reduced without using a twisting mechanism, and the butt contact portion slides from the side surface of the finger so that the thickness direction surface of the butt contact portion becomes the width direction surface of the finger plate. come into contact with Therefore, the contact area between the butt contact portion and the finger is reduced, and the frictional resistance at the time of contact is reduced. Therefore, the blade operating force can be reduced.

According to the second aspect of the invention, since the surface of the plate of the butt contact portion in the thickness direction is made of silver graphite, the contact portion can be slid, the operating force can be reduced, and wear of the contact portion can be reduced.

According to the third aspect of the invention, the arc contactor slides from the side surface of the finger ahead of the butt contact portion to spread the finger vertically. That is, when the butt contact portion is closed, the impact and load applied between the butt contact portion where the load is most applied and the finger contact position are first received by the arc contact, and the finger is pushed up and down before the main contact. The butt contact part of the part slides. As a result, the load on the main contact portion can be minimized.

According to the fourth aspect of the invention, since the butt contact portion slides along the side surface of the linear finger, the R portion (arc portion) of the guide element of the finger can be reduced in opening/closing operation. Also, by reducing the R portion, the silver plating range can be halved.

According to the fifth aspect of the invention, the blade is composed of two upper and lower aluminum plates spaced apart from each other by a predetermined distance. cost reduction and weight reduction can be achieved.

According to the sixth aspect of the invention, when the blade is displaced, the finger or the arc contact comes into contact with the stopper plate, and the contact between the finger and the butt contact portion can be maintained. Further, even if the stopper plate gets over the butt contact portion when the plurality of fingers are displaced, the contact state between the plurality of fingers and the butt contact portion can be maintained.

According to the seventh aspect of the invention, the fourth lever is arranged at a predetermined angle with respect to the third lever, and the length of the fourth lever is substantially the same as the length of the third lever. The rotation angle of the thrust section becomes smaller than the rotation angle of the conventional thrust section, and the power increase rate of the operating force is increased.

According to the eighth aspect of the invention, when the arc contactor is turned on, the arc is generated in the upper finger that comes into contact with the arc contactor first, and when the arc contactor is released, the arc is generated in the upper finger that finally cuts off the arc contactor. be able to.

According to the invention according to claim 9, the same effects as those of the invention according to claim 5 can be obtained.

According to the invention according to claim 10, the same effects as those of the invention according to claim 6 can be obtained.

It is a figure which shows the structure for one phase of the horizontal two-point disconnecting switch which concerns on 1st Embodiment. FIG. 3 is a perspective view showing a structure for three phases of the horizontal two-point disconnecting switch according to the first embodiment; It is the figure which looked at the structure for three phases of the horizontal two-point disconnecting switch which concerns on 1st Embodiment from the top. It is a figure which shows the structure which the thrust part and operating device of the horizontal two-point disconnecting switch which concern on 1st Embodiment are connected by several levers. It is the figure which looked at the state which rotated the blade shown in FIG. 4 clockwise. It is the figure which looked at the state which further rotated the blade shown in FIG. 5 clockwise. FIG. 7 is a top view of a state in which the blade shown in FIG. 6 is further rotated clockwise and the butt contact portion of the blade is in contact with a plurality of fingers; FIG. 4 is a diagram showing a direct-throwing slide operation in which the blades of the horizontal two-point disconnecting switch according to the first embodiment are directly thrown into a plurality of fingers; It is a figure which shows the butt contact part to which an arc contact is attached in the horizontal two-point disconnecting switch which concerns on 1st Embodiment, and a main contact consists of silver graphite. FIG. 4 is a diagram showing a structure in which an arc contact attached to a butt contact portion of the horizontal two-point disconnecting switch according to the first embodiment pushes up a finger to guide the contact portion; FIG. 5 is a diagram showing a structure in which the finger and the butt contact do not come out of contact when the butt contact is put into the finger when the blade is displaced due to an earthquake or the like in the horizontal two-point disconnector according to the first embodiment. FIG. 5 is a diagram showing a structure in which the contact portion maintains a contact state even when the fixed contact portion is displaced and the butt contact portion climbs over the stopper plate in the horizontal two-point disconnecting device according to the first embodiment. FIG. 4 is a diagram showing a structure in which springs that apply contact pressure are arranged only below the fingers in the horizontal two-point disconnecting switch according to the first embodiment; FIG. 5 is a diagram showing the rotation angle of the operating device and the rotation angle of the thrust portion when opening and closing the blade twist structure of the conventional horizontal two-point cutting switch. It is a figure which shows the rotation angle of the operating device at the time of opening and closing of the blade direct throwing structure of the horizontal two-point cutting switch which concerns on 1st Embodiment, and the rotation angle of a thrust part. FIG. 5 is a diagram showing the relationship between the operating shaft rotation angle and the power increase factor in the structures of the conventional thrust portion and the thrust portion of the first embodiment; It is a figure which shows the 1st Example which shows the structure which separates as far as possible the arc damage at the time of apparatus opening/closing of the arc contactor of the horizontal two-point disconnecting switch which concerns on 1st Embodiment from the main contact. It is a figure which shows the 2nd Example which shows the structure which separates as far as possible the arc damage at the time of apparatus opening/closing of the arc contactor of the horizontal two-point disconnecting switch which concerns on 1st Embodiment from the main contact.

A horizontal two-point disconnecting device according to an embodiment of the present invention will be described in detail below with reference to the drawings.

(First embodiment)
FIG. 1 is a diagram showing the structure of one phase of the horizontal two-point disconnecting switch according to the first embodiment. FIG. 2 is a perspective view showing a structure for three phases of the horizontal two-point disconnecting switch according to the first embodiment. FIG. 3 is a top view showing the structure for three phases of the horizontal two-point disconnect switch according to the first embodiment.

(Configuration of horizontal two-point disconnector)
As shown in FIG. 1, the horizontal two-point disconnect switch is, for example, 72 kV, 2000 A, and three insulators are arranged per phase. A rotary insulator 3 rotatably supported via a thrust portion 2 is arranged in the central portion of the base 1 .

A blade 5 supported by a blade support 8 is attached to the top of the rotary insulator 3 . The blade 5 is composed of a plate arranged in the horizontal direction, the thickness direction of the plate is arranged in the vertical direction, and rotates together with the rotary insulator 3 .

Both ends of the blade 5 are attached with butt contact portions 51 each constituted by a movable contact made of a plate. The butt contact portion 51 is arranged vertically in the width direction of the plate and horizontally in the thickness direction of the plate.

Support insulators 4 are provided at both ends of the base 1 . A fixed contact portion 7 supported by a fixed contact portion support portion 9 is attached to the top of the support insulator 4 . The fixed contact portion 7 has a plurality of juxtaposed fingers 71, and the plurality of fingers 71 is formed of horizontally arranged plates, as shown in FIG. As shown in FIG. 1, the plurality of fingers 71 are arranged such that the thickness direction of the plate is vertical, and the butt contact portion 51 contacts and separates. The plurality of fingers 71 are straight fingers, as shown in FIG.

As shown in FIG. 1, the blade 5 is made up of two upper and lower elongated aluminum plates which are spaced apart from each other by a predetermined distance.

In the three-phase horizontal two-point disconnect switch shown in FIG. 4c, blades 5a, 5b, 5c, a butt contact portion 51, and a plurality of fingers 71 are provided.

FIG. 4 is a diagram showing a structure in which the thrust portion 2a of the horizontal two-point disconnecting switch according to the first embodiment and the operating device 10 are connected by a plurality of levers. The operating device 10 rotates the rotary insulator 3 and the blade 5, and has a lever 11a and a lever 11b. One end of the lever 11a is connected to the rotatable operating device body SS2 by a pin 14a, and the other end of the lever 11a is connected to one end of the lever 11b by a pin 14b.

The thrust portion 2a includes a disc-shaped thrust portion main body SR2, a lever 12a, a lever 12b arranged to face the lever 12a by approximately 180 degrees, and a lever 12b with the center O of the thrust portion main body SR2 as a central axis. A lever 12c, which is rotated clockwise by a predetermined angle (for example, about 40 degrees) and has substantially the same length as the lever 12b, protrudes. The lever 11a, the lever 11b, the lever 12a, the lever 12b, and the lever 12c constitute a link mechanism.

One end of the lever 12c is connected to the other end of the lever 11b by a pin 14c. A wire 13 is connected to the lever 12b by a pin 14d. A wire 13 is connected to the lever 12a by a pin 14e.

As shown in FIG. 3, in the thrust portions 2b and 2c, the wire 13 is connected to the lever 12a by the pin 14e, and the wire 13 is connected to the lever 12b by the pin 14d.

(Rotating motion of blade)
The rotation operation of the blade 5 in the above configuration will be described. First, when the lever 11a of the operating device 10 shown in FIG. 4 rotates clockwise, the levers 11a, 11b, 12c, and 12b are pushed up, the lever 12a is pushed down, and the blade 5a is rotated clockwise as shown in FIG. direction.

In the thrust portions 2b and 2c as well, the wire 13 is connected to the lever 12a by the pin 14e, and the wire 13 is connected to the lever 12b by the pin 14d, so that the blades 5b and 5c also rotate clockwise.

Further, when the lever 11a rotates clockwise, the levers 11a, 11b, 12c, and 12b are further pushed up, and the lever 12a is further pushed down to further rotate the blade 5a clockwise, as shown in FIG. .

Further, when the lever 11a rotates clockwise, the levers 11a and 11b are arranged substantially on the same straight line as shown in FIG. 7, the levers 12c and 12b are further pushed up, and the lever 12a is further pushed down. , the blade 5a rotates clockwise and the butt contact portion 51 is directly thrown into the plurality of fingers 71. As shown in FIG.

(Structure in which the butt contact portion is directly inserted into the finger)
FIG. 8(b) is a side view along AA in FIG. 8(a). The plurality of fingers 71 are provided vertically, as shown in FIG. The logarithm of the upper plurality of fingers 71 and the lower plurality of fingers 71 is four pairs. Note that the number of pairs of fingers 71 on the upper side and the fingers 71 on the lower side may be three. The structure can be simplified by setting the logarithms of the plurality of fingers 71 on the upper side and the plurality of fingers 71 on the lower side to three pairs.

As shown in FIG. 8( a ), the butt contact portion 51 slides on the side surfaces of the fingers 71 . At this time, as shown in FIG. 8B, the butt contact portion 51 contacts the upper plurality of fingers 71 and the lower plurality of fingers 71 .

(Effect of directly inserting the butt contact part into the finger)
According to the horizontal two-point disconnector according to the first embodiment, when the rotary insulator 3 is rotated horizontally by the operation device 10 and the blade 5 is rotated, the butt contact portion 51 is inserted into the finger. It is turned on directly and becomes a closed state. Therefore, it is possible to provide a horizontal two-point disconnecting device that can reduce the parts cost and assembly cost with a simple structure without using a twisting mechanism.

In the conventional general horizontal two-point cutting machine, the blade consists of a plate arranged in the horizontal direction, the thickness direction of the plate is arranged in the vertical direction, and the plurality of fingers consists of plates arranged in the horizontal direction, The thickness direction of the plate was arranged in the vertical direction, and the butt contact portions at both ends of the blade were directly inserted into a plurality of fingers. For this reason, the contact area between the butt contact portion and the plurality of fingers is large, so the frictional resistance at the time of contact is large.

(Effect when the butt contact portion contacts the finger)
On the other hand, in the horizontal two-point disconnector according to the first embodiment, as shown in FIGS. The thickness direction surface of the plate of the finger 71 contacts the width direction surface of the plate of the finger 71 . Therefore, the contact area between the butt contact portion 51 and the finger 71 is reduced, and the frictional resistance at the time of contact is reduced. Therefore, the blade operating force can be reduced.

(Silver-graphite structure of butt contact)
As shown in FIG. 9, the blade 5 is attached to one surface of the clad plate 53 and the butt contact portion 51 is attached to the other surface of the clad plate 53 with screws 54 . The upper and lower surfaces in the thickness direction of the plate of the butt contact portion 51 are made of silver graphite.

Thereby, the slidability when the butt contact portion 51 slides on the plurality of fingers 71 can be enhanced, and friction can be reduced. Therefore, the operating force can be reduced, and the wear of the contact portion can also be reduced.

(Structure and effect of arc contact)
Further, as shown in FIG. 9, the arc contactor 21 is attached by a screw 56 via a connecting member 55 to the tip of the butt contact portion 51 in the longitudinal direction and on the blade side. Arc contact 21 is made of copper, tungsten, or the like.

As shown in FIGS. 10(a) and 10(b), the arc contactor 21 has a tapered portion 22 whose tip is gradually tapered, and slides from the side surface of the finger 71 ahead of the butt contact portion 51 to reach the finger. Push 71 up and down. As shown in FIG. 10C, the fingers 71 in the first row come into contact with the butt contact portion 51 and spread the fingers 71 in the second row.

That is, when the butt contact portion 51 is closed, the arc contact 21 first receives the impact and load applied at the finger contact position with the butt contact portion 51 where the load is most applied, and the finger 71 is pushed up and down. Then, the butt contact portion 51 of the main contact portion slides. As a result, the load on the main contact portion can be minimized.

(Finger configuration and effects)
Further, by using the linear finger 71 and the butt contact portion 51 sliding on the side surface of the linear finger 71, the R portion (circular arc portion) of the guide element of the finger 71 can be reduced in the opening/closing operation. Also, by reducing the R portion, the silver plating range can be halved.

(Configuration and effect of blade 5)
As shown in FIG. 1, the blade 5 is composed of two upper and lower aluminum plates spaced apart by a predetermined distance, so that the rigidity of the blade 5 and heat dissipation can be achieved, and the horizontal two-point cutting circuit can be used. Cost reduction and weight reduction can be achieved.

(Structure and effect of stopper plate)
FIG. 11 shows that when the blade 5 is displaced due to an earthquake or the like in the horizontal two-point disconnecting switch according to the first embodiment, the contact between the finger 71 and the butt contact portion 51 is released when the butt contact portion 51 is put into the finger 71. FIG. 10 is a diagram showing a structure without;

As shown in FIGS. 11(a) and 11(c), the stopper plate 31 is closer to the blade with respect to the arc contactor 21 and is closer to the outermost finger 71 than the fingers 71. are arranged as follows.

As shown in FIGS. 11(a) to 11(c), the arc contactor 21 contacts the stopper plate 31 when the blade 5 is displaced in the horizontal direction (B). The finger 71 contacts the stopper plate 31 when the blade 5 is displaced in the vertical direction (A). Therefore, the stopper plate 31 can maintain the contact state between the plurality of fingers 71 and the butt contact portion 51 .

FIG. 12 shows a state in which the fixed contact portion (fingers 71) is displaced in the horizontal two-point disconnecting switch according to the first embodiment, and the contact portion is in contact with the butt contact portion 51 even when the butt contact portion 51 climbs over the stopper plate 31. FIG. 10 is a diagram showing a structure to maintain;

The amount of displacement of the top portion when the allowable load of the insulator is applied is 35 mm, and it is difficult to think that it exceeds 64 mm, which exceeds the stopper plate 31. However, the case where it exceeds is shown in FIG. 12(a). 64mmm is equivalent to 0.9G resonant sine three waves when converted to seismic motion.

As shown in FIG. 12(b), even if the fixed contact portion is displaced by an external force, the contact portion can maintain the copper contact state even if the butt contact portion 51 is overcome. The contact pressure is applied within the elastic deformation of the insulator and bolt.

(Arrangement of springs on fingers)
In the conventional horizontal two-point disconnect switch shown in FIG. 13(a), vertically arranged fingers 71a, 71a are attached to a terminal block 70, pins 74 are inserted through the fingers 71a, 71a, and contact pressure is applied. A spring 75a is attached to the pin 74 above the upper finger 71a.

In this example, the pin 74 slides against the iron support 73a, peeling off the plating and causing rust. In the case of the upper spring 75a, corona was more likely to occur because the projections were directed toward the outside of the structure.

For this reason, in the conventional horizontal two-point disconnecting switch shown in FIG. installed.

Accordingly, the followability of the fingers can be improved, and rust can be suppressed by using the support 73b made of brass. FIG. 13(c) is a diagram showing a structure in which springs that apply contact pressure are arranged only under the fingers in the horizontal two-point disconnecting switch according to the first embodiment. In FIG. 13(c), a spring 75 is attached to apply contact pressure to the lower finger 71. In FIG. The projections can be oriented inward to suppress the generation of corona. The support portion 73 can be made of brass to suppress rust.

Further, the followability of the finger can be improved by reducing the friction coefficient and reducing the contact area by the material of the support portion 73 . Furthermore, since the upper finger 71 moves downward due to its own weight, it is possible to use only the lower spring 75 in consideration of the followability improvement of the lower finger 71 .

(Rotation angle of operating device and rotation angle of thrust part)
Next, the rotation angle of the thrust section will be described. First, with reference to FIG. 14, the rotation angle of the operating device and the rotation angle of the thrust portion when opening and closing the twisted blade structure of the conventional horizontal two-point cutting switch will be described. A conventional horizontal two-point disconnector adopts a twisted structure.

FIG. 14(a) shows the rotation angle of the operating device and the rotation angle of the thrust portion when the blade twisting structure is closed (the blade is in contact with the finger). FIG. 14(b) shows the rotation angle of the operating device and the rotation angle of the thrust portion when the blade twisting structure is open (the blade is separated from the finger).

The operating device has a lever 11A, a lever 11B, and a lever 11C. One end of the lever 11A is connected to the rotatable operating device body SS1 by a pin, and the other end of the lever 11A is connected to one end of the lever 11B by a pin. The other end of lever 11B is connected to one end of lever 11C by a pin.

The thrust portion is connected to a disc-shaped thrust portion main body SR1 by a pin to a lever 12A, a lever 12B arranged to face the lever 12A approximately 180 degrees, and the other end of the lever 11C, and is approximately parallel to the lever 12B. and a lever 12C which is shorter than the lever 12B. The lever 11A, the lever 11B, the lever 11C, the lever 12A, the lever 12B, and the lever 12C constitute a link mechanism.

In the above configuration, as shown in FIG. 14A, when the operation device main body SS1 is rotated counterclockwise from the closed state of the blade twisting structure, the levers 11A, 11B, 11C, the lever 12A, The levers 12B and 12C also rotate counterclockwise.

Then, as shown in FIG. 14(b), when the blade twisting structure is opened, the lever 11A of the operating device is rotated 190 degrees from the blade twisting structure closed state shown in FIG. 14(a). move. That is, the rotation angle of the operating device is 190 degrees.

Further, as shown in FIG. 14(b), when the blade twisting structure is opened, the lever 12C of the thrust section is rotated 95 degrees from the closed state of the blade twisting structure shown in FIG. 14(a). move. That is, the rotation angle of the thrust portion is 95 degrees.

Next, with reference to FIG. 15, the rotation angle of the operating device and the rotation angle of the thrust portion when opening and closing the straight-throw blade structure of the horizontal two-point cutting path switch according to the first embodiment will be described.

Since the operation device SS2 and the levers 11a and 11b of the operation device and the thrust portion main body SR1 and the levers 12a, 12b and 12c of the thrust portion 2 have already been described with reference to the configuration shown in FIG. are omitted.

In the above configuration, as shown in FIG. 15(a), when the operating device main body SS2 is rotated counterclockwise from the closed state of the blade direct throwing structure, the levers 11a, 11b, the lever 12a, and the lever 12b are rotated. , the lever 12c also rotates counterclockwise.

Then, as shown in FIG. 15(b), when the direct-throwing blade structure is opened, the lever 11a of the operating device is rotated 190 degrees from the closed state of the direct-throwing blade structure shown in FIG. 15(a). move. That is, the rotation angle of the operating device is 190 degrees.

Further, as shown in FIG. 15(b), when the direct-throwing blade structure is opened, the lever 12c of the thrust portion 2 is rotated 70 degrees from the closed state of the direct-throwing blade structure shown in FIG. 15(a). Rotate. That is, the rotation angle of the thrust portion 2 is 70 degrees.

That is, the rotation angle of the conventional thrust portion shown in FIG. 14 was 95 degrees, but the rotation angle of the thrust portion 2 of the embodiment shown in FIG. .

FIG. 16 is a diagram showing the relationship between the operating shaft rotation angle and the power increase factor in the structures of the conventional thrust portion and the thrust portion 2 of the first embodiment. In FIG. 16, the dotted line indicates the operating shaft rotation angle and the power increase factor of the conventional thrust section (current device). The solid line indicates the operating shaft rotation angle and the power increase rate of the thrust portion 2 of the embodiment.

It can be confirmed from FIG. 16 that the power increase factor of the structure of the thrust portion 2 of the embodiment is increased by 1.3 times or more as compared with the power increase factor of the conventional thrust portion structure. Moreover, at the rotation angle where the maximum structural load is applied, the increase is 1.6 times or more.

(Modification of the first embodiment)
Next, a description will be given of a structure for separating damage to the arc contactor 21 from the main contact portion as much as possible when switching equipment. First, as a conventional configuration, when the upper finger and the lower finger have symmetrical R portions (curved portions) at their ends, an arc is generated when the arc contactor approaches the main contact portion. A characteristic of arc discharge is that when the arc contactor is turned on, an arc is generated at the first contact point, and when the arc contactor is released, an arc is generated at the last contact point.

Therefore, in the embodiment, as shown in FIG. 17A, fingers having vertically asymmetrical R portions 81 and 82 at their ends are used. By making the size of the R portion 82 smaller than the size of the R portion 81, as shown in FIG. . In addition, even when the contact is opened, the point where the contact is finally disconnected is surely the R portion 81 of the upper finger.

That is, when the arc contactor 21 is turned on, the arc is generated in the upper finger that contacts the arc contactor 21 first, and when the arc contactor 21 is opened, the arc is generated in the upper finger that finally cuts off the arc contactor 21.例文帳に追加

Also, as shown in FIG. 18(a), a finger having an enlarged R portion 83 inside the finger may be used. When the diameter of the R portion 83 is increased, an arc is generated between the arc contactor 21 and the main contact portion.

As shown in FIG. 18(b), when the arc contactor 21 is separated from the R portion 83, the arc generating position of the finger moves from the lower side of the R portion 83 to the upper side. Furthermore, as shown in FIG. 18(c), when the arc contactor 21 separates from the R portion 83, the arc generation position of the finger moves further above the R portion 83. As shown in FIG.

In this way, by increasing the radius of the R portion 83 inside the finger, the arc generation position can be moved upward outside the finger, and arc damage to the main contact portion can be prevented.

The present invention is not limited to the horizontal two-point disconnector according to the first embodiment. As the horizontal two-point disconnecting switch according to the second embodiment, only the configuration of the blade 5 among the multiple configurations of the horizontal two-point cutting switch according to the first embodiment may be adopted. Except for the configuration of the blade 5, the configuration is the same as that of the conventional horizontal two-point disconnect switch described in Background Art.
In the horizontal two-point cutting machine according to the second embodiment, as shown in FIG. In addition, the cost and weight of the horizontal two-point disconnecting switch can be reduced.

Further, as the horizontal two-point disconnecting switch according to the third embodiment, only the configuration of the stopper plate 31 may be adopted among the multiple configurations of the horizontal two-point cutting switch according to the first embodiment. . Except for the configuration of the stopper plate 31, the configuration is the same as that of the conventional horizontal two-point cutting switch described in the background art.

In the horizontal two-point cutting path device according to the third embodiment, the stopper plate 31, as shown in FIGS. The arc contactor 21 contacts the stopper plate 31, and the finger 71 contacts the stopper plate 31 when the blade 5 is displaced in the vertical direction (A). Therefore, the stopper plate 31 can maintain the contact state between the plurality of fingers 71 and the butt contact portion 51 .

Further, as shown in FIG. 12, when the fixed contact portion is displaced in the horizontal two-point disconnecting switch, even if the butt contact portion 51 climbs over the stopper plate 31, the contact portion can be kept in contact.

1 Base 2 Thrust part 3 Rotating insulator 4 Support insulator 5, 5a-5c Blade 7 Fixed contact part 8 Blade support part 9 Fixed contact part support part 10 Operating device 11, 11a, 11b, 12a, 12b, 12c Lever 13 Wire 14a- 14e Pin 21 Arc contact 22 Tapered portion 31 Stopper plate 51 Butt contact portion 52 Silver graphite 53 Clad plate 54 Screw 55 Connecting member 56 Screw 70 Terminal block 71 Fingers 72, 73 Supporting portion 74 Pin 75 Springs 81, 82, 83 R portion 90 main contact

Claims (10)

A rotating insulator rotatably supported in the center of the base,
a blade that is attached to the top of the rotating insulator and consists of a first plate arranged in a horizontal direction, the thickness direction of the first plate being arranged in a vertical direction, and rotating together with the rotating insulator;
a butt contact portion comprising a second plate attached to both ends of the blade, wherein the width direction of the second plate is arranged in the vertical direction;
support insulators supported on both ends of the base;
A third plate attached to the top of the support insulator and arranged in a horizontal direction, the thickness direction of the third plate being arranged in the vertical direction, and a plurality of fingers with which the butt contact portion contacts and separates. with
When the blade rotates, the butt contact portion slides from the side surface of the finger so that the surface of the butt contact portion in the thickness direction of the second plate becomes the surface of the finger in the width direction of the third plate. A horizontal two-point disconnector, characterized in that it contacts and disengages from the 2. The horizontal two-point disconnector according to claim 1, wherein the surface of said butt contact portion in the thickness direction of said second plate is made of silver graphite. An arc contact is attached to the tip of the butt contact portion in the longitudinal direction and on the blade side via a connecting member, and slides from the side surface of the finger ahead of the butt contact portion to vertically spread the finger. 3. The horizontal two-point disconnector according to claim 1 or 2, wherein a horizontal two-point disconnector is provided. 4. A horizontal double-point disconnector according to any one of claims 1 to 3, wherein each of said plurality of fingers comprises a straight finger. 5. The horizontal two-point cutting device according to claim 1, wherein said blade comprises two upper and lower aluminum plates which are spaced apart from each other by a predetermined distance. A stopper plate is provided at the endmost finger among the plurality of fingers so as to maintain contact between the plurality of fingers and the butt contact portion when the blade or the plurality of fingers are displaced. 6. The horizontal two-point disconnector according to any one of claims 1 to 5, wherein the horizontal two-point disconnector is arranged close to the . an operating device having a first lever and a second lever connected to the first lever and rotating the first lever and the second lever;
Attached to the rotary insulator and the operating device, it has a third lever connected to the second lever, a fourth lever connected to the third lever, and a fifth lever connected to the fourth lever. and a thrust portion that rotates the rotating insulator and the blade by rotating the third lever, the fourth lever, and the fifth lever,
The fourth lever is arranged to face the fifth lever by approximately 180 degrees and is arranged to be inclined at a predetermined angle with respect to the third lever. 7. The horizontal two-point disconnector according to any one of claims 1 to 6, wherein the length is substantially the same as the length of the lever. The plurality of fingers comprises an upper finger and a lower finger that disconnect from the arc contact,
said upper finger having a first curved portion at its end and said lower finger having a second curved portion at its end asymmetrical to said first curved portion;
The arc contact first contacts the first curved portion of the upper finger when closing and the first curved portion of the upper finger finally disengages from the arc contact when opening. A horizontal two-point disconnector according to claim 3, characterized by: A rotating insulator rotatably supported in the center of the base,
A blade that is attached to the top of the rotating insulator and consists of a plate arranged in a horizontal direction and that rotates together with the rotating insulator;
a butt contact portion attached to each end of the blade;
support insulators supported at both ends of the base;
a plurality of fingers attached to the support insulator and with which the butt contact portion contacts and disengages when the blade rotates,
A horizontal two-point cutting device, wherein the blade comprises two upper and lower aluminum plates spaced apart from each other by a predetermined distance. A rotating insulator rotatably supported in the center of the base,
A blade that is attached to the top of the rotating insulator and consists of a plate arranged in a horizontal direction and that rotates together with the rotating insulator;
a butt contact portion attached to each end of the blade;
support insulators supported on both ends of the base;
a plurality of fingers attached to the support insulator and with which the butt contact portion comes into and out of contact with when the blade rotates,
A stopper plate is provided to maintain contact between the plurality of fingers and the butt contact portion when the blade or the plurality of fingers are displaced when the butt contact portion is inserted into the plurality of fingers. A horizontal two-point disconnector, characterized in that it is positioned adjacent to said finger positioned at the extreme end of said plurality of fingers.

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