WO2020122495A1

WO2020122495A1 - Arc extinguishing device of eco-friendly gas-insulated load break switch, in which puffer and arc chute are combined

Info

Publication number: WO2020122495A1
Application number: PCT/KR2019/016997
Authority: WO
Inventors: 조병철
Original assignee: 주식회사 에스에이치솔텍; 김태진; 이대성
Priority date: 2018-12-11
Filing date: 2019-12-04
Publication date: 2020-06-18
Also published as: KR101977053B1

Abstract

The present invention relates to an arc extinguishing device of an eco-friendly gas-insulated load break switch, in which a puffer and an arc chute are combined, and to an arc extinguishing device of an eco-friendly gas-insulated load break switch, in which a gas puffer extinguishing scheme that uses mechanically generated compressed gas and an arc chute extinguishing scheme that uses an electromagnetic field principle are mixed, and provides an arc extinguishing device of an eco-friendly gas-insulated load break switch, in which a puffer and an arc chute are combined, the device comprising an enclosure and an extinguishing module mounted inside the enclosure so as to extinguish arc, wherein the extinguishing module comprises: three puffer housings which overlap in parallel so as to connect three phases thereto, and which form an enclosed space with a rotary part; the rotary part which is mounted thereon so as to cross the inside of each of the puffer housings, and on which a movable contact and a rotary piston are mounted thereon so that the movable contact and the rotary piston can rotate in the enclosed space inside the puffer housing; a puffer chamber, which is an enclosed space between the puffer housing and the rotary part; and an arc discharge part comprising the arc chute, which is formed on an upper part of the puffer housing and discharges arc by means of electromagnetic force, and a stationary contact, which is mounted on the rear of the arc chute so as to come into contact with the movable contact.

Description

An arc extinguishing device that combines an eco-friendly gas-insulated load switcher's purper and arc chute.

The present invention relates to an arc extinguishing device using a combination of a puff and an arc suit of an eco-friendly gas insulated load switch, an eco-friendly gas insulation in which a gas purifier extinguishing method using a mechanically generated compressed gas and an arc suit extinguishing method using an electromagnetic field principle are mixed. The invention relates to an arc extinguishing device for a load switchgear.

The arc extinguishing method of the existing gas-insulated high-pressure (1000V-38kV) load switch that does not use a vacuum valve (Vacuum Interrupter) is a gas purifier extinguishing method using largely mechanically generated compressed gas, and an arc shoot extinguishing method using an electromagnetic field principle. Divided. The gas purger method is a principle of extinguishing the arc by generating compressed gas with a puffer as shown in FIG. 1 and flowing compressed gas at a high speed between arcs formed between fixed and movable contacts when the switch is opened/closed. The arc chute method is a method of extinguishing the arc on the principle of the arc chute that divides the arc and the electromagnetic force induced by the arc and arc chute between fixed and movable contacts when the switch is opened/closed as shown in FIG. 2. As shown in Fig. 2, the arc is moved by the electromagnetic force to the arc chute, and the arc entering the arc chute is cooled while being divided and the arc length is increased. When the voltage of the divided arc becomes greater than the system voltage and the current provokes at zero, the arc is extinguished.

The gas purper arc extinguishing method has been applied to a gas insulated load switch that uses SF6 gas with excellent insulation and extinguishing medium in the gas pressure tank, and the arc suit cannot apply a low pressure (1000V or less) AC circuit breaker and gasper arc extinguishing method. High-speed DC circuit breakers have been used. The application of the AC chute's high-pressure AC switch has been limited to the SF6 gas-insulated load switch with high dielectric strength, and is applied to the air circuit breaker with sufficient insulation distance between fixed and movable contacts when applying air insulation.

In this regard, environmentally friendly gas insulation (dry air, nitrogen gas, mixed carbon dioxide gas, etc.) load switch has been developed, but for environmental convenience, the environmentally friendly gas insulation load switcher is equipped with an existing vacuum valve built-in solid insulation load switcher module as an environmentally friendly gas pressure tank. It is only made in the form that is arranged within. Overseas companies have developed a solid insulated load switch with built-in vacuum valve in a closed structure with SF6 gas insulation or dry air tank, and the need for differentiated technological advances in this field is also emerging in Korea.

In order to solve the above problems, the present invention overcomes the technical limitations of the puffing method and the arc-shooting method required by the eco-friendly gas-insulated load switch, and the gas-puffing and arc-shooting methods can be combined in one device. It is an object to provide an arc extinguishing device for a gas-insulated load switch.

In order to achieve the above object, the present invention, the arc extinguishing device in combination with the purifier and the arc chute of an eco-friendly gas-insulated load switch including an arc extinguishing module mounted inside the enclosure and extinguishing the arc, the extinguishing module Silver, three puffer housings overlapping in parallel so that three phases can be connected to form a rotating part and an enclosed space; A rotating unit mounted across the interior of the puff housing and having the movable contact and the rotating piston rotated so that the movable contact and the rotating piston rotate in the interior sealed space of the puff housing; A purper chamber that is a closed space between the purper housing and the rotating portion; And an arc discharge portion formed on an upper portion of the purper housing and configured to be an arc chute for discharging arcs by electromagnetic force and a fixed contact point mounted on the arc chute and in contact with the movable contact point. Provided is an arc extinguishing device that combines a purper and an arc suit.

In the present invention, the rotating unit includes a rotating shaft; A cylindrical portion mounted on the rotating shaft and rotated together with the rotating shaft to form a closed space with the respective puffer housings; A movable contact that protrudes to the outer circumferential surface of the cylindrical portion and is mounted inside the cylindrical portion; And a rotating piston formed on the outer circumferential surface of the cylindrical portion and positioned on the rear side of the movable contact, and rotating together with the cylindrical portion in each of the perforated housings.

In the present invention, the rotary piston is further equipped with a first diaphragm valve to move back and forth, and a second diaphragm valve is mounted to the back side of the purper housing to move back and forth.

In the present invention, when the movable piston is rotated clockwise from the purper chamber and the movable contact is input to the fixed contact, the second diaphragm valve is opened to rotate the rotating piston, so that the rotating piston rotates behind the purper chamber. The arc that passes through the arc chute while preventing rotational resistance due to a vacuum, the gas in front of the rotating piston is compressed according to the clockwise rotation of the rotating piston, and the compressed gas is discharged to the arc chute, which is a compressed gas outlet. It is characterized by dividing at a high speed.

In the present invention, when the rotating piston rotates counterclockwise in the first purper chamber and the movable contact is opened from the fixed contact, the first diaphragm valve is opened, and the compressed air in the rear purper chamber of the rotating piston is arced. It is characterized by dividing the arc passing through the arc chute at high speed while being discharged to the chute.

In the present invention, the arc generated in the limited space is rapidly moved to the arc suit by electromagnetic force. And the advantage of being able to extinguish the arc quickly with compressed gas at the same time as the split.

In addition, the present invention has an advantage in that the compressed gas is discharged at a high speed between the arc chutes, thereby maximizing arc splitting, arc length increase, and arc discharge.

1 is an explanatory drawing of a conventional gas purifier arc extinguishing device.

Figure 2 is an explanatory drawing of a conventional arc suit arc extinguishing device.

3 is a perspective view of an environmentally friendly gas insulated load switch according to the present invention.

4 is a front perspective view of an arc extinguishing device in which a purper and an arc suit according to the present invention are combined.

5 is a rear perspective view of an arc extinguishing device in which a purper and an arc suit according to the present invention are combined.

6 is an exploded perspective view of an arc extinguishing device in which a purper and an arc suit according to the present invention are combined.

7 is a front view of the splitter of the arc suit according to the invention.

8 is a front perspective view of a rotating unit according to the present invention.

9 is a rear perspective view of a rotating part according to the present invention.

10 is a perspective view of a movable contact mounted to the rotating part according to the present invention.

11 is a perspective view of a fixed contact mounted to the arc suit according to the present invention.

12 is an operation diagram of the first diaphragm valve according to the present invention.

13 is an operation diagram of the second diaphragm valve according to the present invention.

The best form for the practice of the present invention is an arc extinguishing device that combines a purifier and an arc chute of an eco-friendly gas-insulated load switch including an enclosure and an arc extinguishing module mounted inside the enclosure to extinguish the arc. Silver, three puffer housings overlapping in parallel so that three phases can be connected to form a rotating part and an enclosed space; A rotating unit mounted across the interior of the puff housing and having the movable contact and the rotating piston rotated so that the movable contact and the rotating piston rotate in the interior sealed space of the puff housing; A purper chamber that is a closed space between the purper housing and the rotating portion; And an arc discharge unit formed on an upper portion of the purper housing and configured to be an arc chute through which an arc is discharged by an electromagnetic force and a fixed junction mounted on the rear of the arc chute to contact the movable contact point.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, this is intended to be described in detail to the extent that one of ordinary skill in the art to which the present invention pertains can easily implement the invention, and thus does not mean that the technical spirit and scope of the present invention are limited.

3 is a perspective view of an eco-friendly gas insulated load switch according to the present invention, FIG. 4 is a front perspective view of an arc extinguishing device in which a gas purper and an arc suit according to the present invention are combined, and FIG. 5 is a gas purper and an arc according to the present invention The rear perspective view of the arc extinguishing device in which the suit is combined, FIG. 6 is an exploded perspective view of the arc extinguishing device in which the gas purper and the arc suit according to the present invention are combined, and FIG. 7 is a front view of the splitter of the arc suit according to the present invention. , Figure 8 is a front perspective view of the rotating part according to the present invention, Figure 9 is a rear perspective view of the rotating part according to the present invention, Figure 10 is a perspective view of a movable contact mounted to the rotating part according to the present invention, Figure 11 is the present invention Accordingly, it is a perspective view of a fixed contact mounted to the arc chute, FIG. 12 is an operation diagram of a first diaphragm valve according to the present invention, and FIG. 13 is an operation diagram of a second diaphragm valve according to the present invention.

As shown in FIG. 3, the eco-friendly gas-insulated load switch 1 according to the present invention includes an enclosure 2 and an arc extinguishing module 10. The enclosure 2 includes a base plate 3, a pair of side plates 4 connected to both sides of the base plate 3, and an upper cover plate connected to both side upper portions of the side plate 4 ( 5) and a fixed contact fixing plate 6 mounted on the upper surface of the upper cover plate 5 to fix the fixed contact 43.

As shown in Figure 4, the inside of the enclosure 2, the arc extinguishing module 10 is mounted, the arc extinguishing module 10, the perfume housing 20, and the rotating part 30 which is mounted through the perfume housing 20 And, it is mounted on the upper portion of the puffer housing 20 is composed of an arc chute portion 40 to extinguish the arc.

Specifically, the puffer housing 20 is formed by overlapping three in parallel so that three phases can be connected, and forms a closed space with the rotating part 30. The puffer housing 20 is composed of a housing body 21 and a support portion 22 for supporting the housing body 21, and gas into which the gas may be injected into the rear face 23 of the housing body 21 Inlet 24 is formed. 5, the rear surface 23 of the housing body 21 may be formed as a vertical surface, and a gas injection hole 24 is provided at the vertical surface. The second diaphragm valve 25 is mounted on the front surface of the gas inlet 24 to serve as an opening/blocking of gas injected into the gas inlet 24.

As illustrated in FIG. 6, the rotating part 30 is mounted inside the puffer housing 20. The rotating portion 30 is mounted on the rotating shaft 31 and the rotating shaft 31 to form a space with the housing body 21 and the cylindrical portion 32, and is mounted inside the cylindrical portion 32, a part of It is formed on the outer contact surface of the cylinder 32, the movable contact 34 protruding outward, and the rotating piston 36 for compressing gas or inducing compressed gas on the back side of the movable contact 34, and the cylinder 32 It consists of a rotating disk 33 for separating the zone for each phase. As shown in Figure 8, the rotary piston 36 is equipped with a first diaphragm valve 37, and a gas injection hole 38 for opening/blocking the inflow of gas by the first diaphragm valve 37 and , The valve shaft of the first diaphragm valve 37 is inserted, and is composed of a valve movement hole 39 for moving back and forth. The cylindrical housing 32 may be further provided with a purpur housing seating groove 321 to form a sealed space with the purpur housing 20.

As shown in FIG. 9, the movable contact 34 rotates together with the cylindrical portion 32, but the other side must be fixed because a wire must be connected to the movable contact 34. Therefore, the movable contact 34 is rotatably connected to the power connection 35. As illustrated in FIG. 10, the movable contact 34 is rotatably connected to the power connection portion 35 to the hinge portion 341.

The arc-suit part 40 will be described in detail with reference to FIGS. 4 and 6. The arc chute 40 includes a chute body 41 formed on an upper portion of the purper housing body 21, and an arc chute 42 and a fixed contact 43 mounted in order to the chute body 41, respectively. It is composed of. The chute body 41 may be formed integrally with the perforating body 21 or may be formed separately. The arc suit 42 is composed of a plurality of splitters (421). The arc is discharged into the space between the splitters 421. Arcing occurs when the movable contact 34 is input to the fixed contact 43 and when the movable contact 34 is opened from the fixed contact 43. Therefore, the arc suit portion 40 is formed in front of the fixed contact (43). 7 is a view of the splitter 421. As shown in the figure, a groove is formed in the lower portion so that the movable contact 34 is movable. 11 shows the fixed contact 43. The fixed contact 43 is provided with a fixed contact portion 44 at the bottom, and an arc is generated while the movable contact 34 is inserted or removed between the fixed contact portions 44.

The puffer chamber 50 will be described in detail with reference to FIGS. 4 and 6. The purper chamber 50 is a chamber that compresses gas by the rotating piston 36. The puffer chamber 50 may be divided into the front and rear of the rotating piston 36 based on the rotating piston 36, the front being referred to as the first purper chamber 51 and the rear being referred to as the second puffer chamber 52 Can be.

Hereinafter, an operation mechanism in the case of an arc will be described with reference to FIGS. 12 and 13. The arc occurs when the movable contact 34 is input to the fixed contact 43 or the movable contact 34 is separated from the fixed contact 43.

First, when the movable contact 34 approaches the fixed contact portion 44 of the fixed contact 43, an arc is generated. The movable contact 34 moves as the cylindrical portion 32 of the rotating portion 30 rotates. When the movable contact 34 moves toward the fixed contact 43, the gas on the side of the first purper chamber 51, which is the front of the rotating piston 36, is compressed, and the compressed gas is an arc chute along with the generated arc. 42). The arc is discharged into the divided space between the splits 421, and the compressed gas is discharged together, so that the arc can be quickly and quickly extinguished. That is, as shown in Figure 12 (a), the first diaphragm valve 37 of the rotating piston 36 is pressurized by compressed gas as the rotating piston 36 rotates and rotates with the rotating piston in a closed state. As shown in FIG. 13(b), since the second purper chamber 52 is instantaneously vacuumed, the second diaphragm valve 25 is forced to be opened. Accordingly, the gas in front of the rotating piston 36 is compressed, but the rear side of the rotating piston 36 is not compressed, so that resistance to rotation does not occur, and the first purper chamber 51 which is the front side of the rotating piston 36 is not compressed. Since the compressed gas on the) side has to be discharged into the space between the splits 421, the arc is also divided and quickly extinguished.

Next, when the movable contact 34 is opened from the fixed contact 43, an arc is generated at the time of opening. In order for the movable contact 34 to be spaced apart from the fixed contact 43, the cylindrical portion 32 is rotated, and the rotating piston 36 is rotated together according to the rotation of the cylindrical portion 32, the rotating piston 36 It is moved away from the fixed contact 43, and accordingly, the gas on the side of the second purper chamber 52, which is the rear side purper chamber of the rotating piston 36, is compressed. Since the gas on the side of the second purper chamber 52 is compressed, the first diaphragm valve 37 is opened as shown in Fig. 12(b), and the compressed gas on the side of the second purper chamber 52 as shown in Fig. 13(a). Due to the pressure due to the second diaphragm valve 25 maintains a closed state, the compressed gas is discharged to the opened first purper chamber 51 side. Therefore, the arc is extinguished while being quickly discharged to the outside together with the compressed gas discharged through the first diaphragm valve (37).

Although the embodiments have been described by way of example, the fact that the present invention can be embodied in various other forms without departing from its spirit and scope is obvious to those skilled in the art. Therefore, the above-described embodiments are to be regarded as illustrative rather than restrictive, and all implementations within the scope of the appended claims and equivalents thereof will be included within the scope of the present invention.

The present invention is an arc extinguishing device in which a gas purifier extinguishing method using a mechanically generated compressed gas and an arc-shooting extinguishing method using an electromagnetic field principle are mixed, and the conventional SF6 is used to extinguish the arc using environmentally friendly gas such as air or nitrogen. It is an eco-friendly invention that does not use gas and has high industrial applicability.

Claims

In the arc extinguishing device that combines the purifier and the arc chute of an environmentally friendly gas-insulated load switch including an extinguishing module mounted on the base plate of the enclosure and the arc extinguishing,

The SOHO module,

Three puffer housings spaced at regular intervals in parallel so that the three phases can be connected to each other and fixedly mounted on the base plate and formed to surround the cylindrical portion of the rotating part to form a predetermined space;

A pair of rotational shafts rotatably mounted on both side plates of the enclosure, and each cylindrical spacer installed between the pair of rotational shafts and rotated together with the rotational shaft to form a separation distance between three phases, The cylindrical spacers are formed integrally with the same diameter to form each of the perforated housings and a predetermined space, and each of the cylindrical spacers and each of the cylindrical parts is partitioned, and each of the perforated housings is seated. Each of the perforated housing seating groove consisting of a pair, and a rotating portion composed of a respective rotating piston formed on the outer circumferential surface of each cylindrical portion to compress the gas in each of the predetermined spaces;

Each movable contact is mounted on the inside of each of the cylindrical portions and protrudes to the outer circumferential surface of each of the cylindrical portions, and each movable contact is installed in front of each of the rotating pistons, and each movable contact is hinged to the top so as to be rotatable. Three movable contact portions each composed of lower fixed contacts to which power is connected;

Each arc chute housing integrally formed on the upper portion of each furper housing, each arc chute installed on each arc chute housing and discharging the arc to the outside by electromagnetic force, and behind each arc chute Each fixed contact which is mounted to contact each of the movable contact points, is located at the rear side of each of the fixed contact points and is protruded to contact the respective cylindrical parts integrally with the lower portion of the arc chute housing. Three arc discharge unit consisting of each blocking plate to block the flow of gas so that the gas compressed by the rotation of the gas is discharged through each of the arc chute; And

It is formed as a predetermined space between each of the perforating housings and each of the cylindrical parts, is divided by each of the rotating pistons and each of the blocking plates, and is a front side of the perforating housing in which each of the rotating pistons rotates. Three puffer chambers consisting of a first puffer chamber and a second puffer chamber on the rear side;

An arc extinguishing device that combines the purper and the arc chute of an environmentally friendly gas-insulated load switch that includes.
According to claim 1,

The spacer is formed in the center, arc extinguishing device in combination with a purper and an arc suit, characterized in that a rotating disk is further formed to help the rotational force.
According to claim 1,

Each rotary piston is equipped with a first diaphragm valve to move back and forth according to the movement of the gas in the purper chamber to open and close the injection of gas, and a second diaphragm valve is mounted on the rear side of each purper housing to provide a An arc that combines the puff and arc chute of an eco-friendly gas-insulated load switch, characterized in that it moves back and forth according to the movement of the gas to open and close the injection of gas, but the opening and closing of the first diaphragm valve and the second diaphragm valve are reversed to each other. Extinguishing device.
According to claim 3,

When the rotating piston rotates clockwise in the purper chamber and the movable contact is applied to the fixed contact, the first diaphragm valve is blocked and the second diaphragm valve is opened to rotate the rotating piston as the rotating piston rotates. Prevents rotational resistance due to the vacuum of the purper chamber behind the piston, and the gas in front of the rotating piston is compressed according to the clockwise rotation of the rotating piston, and the compressed gas is discharged to the arc chute, which is the discharge port, to prevent arcing. An arc extinguishing device that combines an eco-friendly gas-insulated load switcher's purper and an arc chute, characterized by split discharge at high speed.
According to claim 3,

When the movable piston is rotated counterclockwise in the first purper chamber and the movable contact is opened from the fixed contact, the first diaphragm valve is opened and the second diaphragm valve is blocked so that the rear puffer of the rotating piston Environment-friendly gas insulation load characterized in that the compressed gas in the chamber moves to the first purper chamber through the first diaphragm valve, and the compressed gas transferred to the first purper chamber is discharged to the arc chute and the arc is divided and discharged at high speed. An arc extinguishing device that combines a switcher's purper and an arc chute.