KR20150073889A

KR20150073889A - Disconnector Switchgear

Info

Publication number: KR20150073889A
Application number: KR1020150061095A
Authority: KR
Inventors: 심민섭
Original assignee: 주식회사 신흥전력
Priority date: 2015-04-30
Filing date: 2015-04-30
Publication date: 2015-07-01
Also published as: KR101556570B1

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disconnecting switch opening / closing device, and more particularly, to an improved disconnecting switch opening / closing device capable of smoothly opening / closing operation without malfunction because hydraulic pressure and electric power can be used together with a hydraulic actuator while minimizing contact shock .
According to the present invention, it is possible to use both the hydraulic pressure and the electric power, so that an effect that the disconnector opening and closing operation can be performed smoothly without malfunction can be obtained.

Description

Disconnector Switchgear

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disconnecting switch opening / closing device, and more particularly, to an improved disconnecting switch opening / closing device capable of smoothly opening / closing operation without malfunction because hydraulic pressure and electric power can be used together with a hydraulic actuator while minimizing contact shock .

Generally, a disconnector is one of electric power facilities. It is a device that opens and closes a circuit in order to change the connection of the main circuit with the circuit breaker in an unloaded state, such as a transmission line or a substation.

Since these circuits are mechanically separated from each other, they are convenient for inspection and repair, and they have a simple structure because they control only a small amount of current unlike circuit breakers.

As prior art related to the disconnecting device, there have been disclosed a utility model registration notification No. 1988-0001428 (April 15, 1988), a registered patent No. 0339331 (May 22, 2002), a registered patent No. 0943889 (Feb. have.

1, the movable contactor 10 is rotated so as to switch the first terminal 20 and the second terminal 30 in an interlocking manner. At this time, the movable contactor 10 is turned on, Depending on the driving method of the motor, it is divided by electric or manual.

Since the motorized system is more convenient than the manual system, it is widely used at present, and the movable contactor 10 is rotated and disconnected by mainly connecting the axis of the movable contactor 10 to the motor (motor)

However, due to the sticking of the disconnecting device due to aging, the driving force is weak in the motor driving system, and the disconnecting device is frequently not operated, causing problems in the inspection and maintenance work.

In addition, when the motor is driven, there is a high risk of a safety accident, such as generating arc due to non-uniformity of the driving force, causing the movable contactor 10 to suddenly rotate while generating a contact shock.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems in the prior art, and it is an object of the present invention to provide a hydraulic actuator capable of using both a hydraulic pressure and an electric motor using a hydraulic actuator while minimizing contact shock, And a main object thereof is to provide an improved breaker opening and closing apparatus.

In order to achieve the above object, according to the present invention, there is provided a breaker opening / closing apparatus in which a disconnecting function is performed by a movable contactor (10) which is rotated by a second insulator (14) in one insulator (12) Shaped connection bar 60 is integrally fixed to a lower end portion of the movable contact 10; The end of the connecting bar (60) is integrally fixed to a linear rotary shaft (70); Both ends of the linear rotary shaft (70) are rotatably fixed by a bearing block (80); An electric motor (50) is coupled to one end of the rotating shaft (70); A rotation induction bar 44 protrudes from a part of the length of the rotation shaft 70; A cylinder rod 42 is hingedly connected to an end of the rotation induction bar 44; The cylinder rod (42) is connected to a hydraulic cylinder (40); The lower end of the hydraulic cylinder 40 is fluidically linked on the fixed side; A buffer housing (100) is further fixed on one side surface of the end of the movable contact (10); A guide rack 200 having a predetermined curvature is fixed on the other insulator 14, which is the side on which the movable contact 10 is rotated; A pinion gear 110, which can be engaged with the guide rack 200, is fixed to an outer side surface of the buffer housing 100; An internal first gear 120 coaxial with the pinion gear 110 is provided in the buffer housing 100; The inner first gear 120 is meshed with the inner second gear 130; The internal first and second gears 120 and 130 are partitioned from the chamber 140 by the partition W, The chamber 140 is configured to communicate with a space in which the first and second gears 120 and 130 are installed through a first communication hole 150 formed in the partition W, The space in which the chamber 140 and the first and second gears 120 and 130 are installed is filled with oil. A second communication hole 160 having an inlet at the side of the chamber 140 and a narrow outlet at a side of the first and second gears 120 and 130 is formed; Wherein the chamber (140) is further provided with an oil filling port (170) to replenish the oil.

At this time, the first communication hole 150 has a wide inlet and narrow outlet, and is characterized in that it has a shock-absorbing function by slowing the perfusion rate when the pressure is increased.

According to the present invention, it is possible to use both the hydraulic pressure and the electric power, so that an effect that the disconnector opening and closing operation can be performed smoothly without malfunction can be obtained.

1 is an exemplary view showing an example of a conventional disconnecting switch.
2 is a schematic view showing a configuration of a disconnecting switch opening / closing device according to the present invention.
Fig. 3 is a cross-sectional view of the main portion constituting the disconnecting switch device according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

As shown in FIG. 2, the disconnector switching device according to the present invention is characterized in that the method of rotationally driving the movable contactor 10 is configured to use both the hydraulic cylinder 40 and the electric motor 50.

In the present invention, since the electric motor 50 is used solely, there arises a problem of inoperability or malfunction. However, in the present invention, by adding strong force by the hydraulic pressure of the hydraulic cylinder 40, .

Particularly, the disconnector switching apparatus according to the present invention can be configured so that a plurality of disconnectors can be simultaneously opened and closed.

To this end, the movable contactor 10 is rotatably fixed on the insulator 12, and a substantially 'a' shaped connecting bar 60 is hingedly connected to a lower end portion of the movable contactor 10 .

The end of the connecting bar 60 is integrally fixed to the linear rotary shaft 70.

Both ends of the linear rotary shaft (70) are rotatably fixed by a bearing block (80).

An electric motor 50 is coupled to one end of the rotation shaft 70 and a rotation induction bar 44 protrudes from a part of the length of the rotation shaft 70. At an end of the rotation induction bar 44, The cylinder rod 42 is connected to the hydraulic cylinder 40 and the lower end of the hydraulic cylinder 40 is fixed to a fixed member Quot;).

When the electric motor 50 rotates clockwise and simultaneously the hydraulic cylinder 40 advances, the rotary shaft 70 is rotated in the clockwise direction. In this case, due to the pushing force of the cylinder rod 42, The rotational force of the rotary shaft 70 is further increased.

Since the lower end of the hydraulic cylinder 40 is linked to the hydraulic cylinder 40 at this time, the hydraulic cylinder 40 also rotates at the lower end of the link when the rotary shaft 70 is rotated. Therefore, There is no difficulty.

Thus, the electric motor 50 and the hydraulic cylinder 40 can be simultaneously driven. Even if the electric motor 50 and the hydraulic cylinder 40 are simultaneously driven, the rotary shaft 70 can be rotated in the same direction without interfering with each other.

In this case, the rotation radius of the rotation shaft 70 should be limited to a certain angle. Otherwise, the rotation of the rotation shaft 70 may cause the connection portion of the hydraulic cylinder 40 to be broken.

Therefore, the rotation radius of the rotary shaft 70 must be within the stroke of the cylinder rod 42. Since the stroke is adjustable, the rotary motor 70 can exert a sufficient force, and the electric motor 50 is driven by a step motor ) Should be used.

Therefore, even if the movable contactor 10 is somewhat stuck due to aging, it can be smoothly rotated because it is pushed out with a strong force.

3, the buffer housing 100 is further fixed to one side surface of the end portion of the movable contactor 10, and a predetermined curvature is formed on the other insulator 14, to which the movable contactor 10 is rotated The bent guide rack 200 is fixed.

At this time, a pinion gear 110, which can be engaged with the guide rack 200, is fixed to one outer side surface of the buffer housing 100, and the pinion gear 110 and the coaxial The first internal gear 120 is provided.

The inner first gear 120 is meshed with the inner second gear 130 and the inner first and second gears 120 and 130 are separated from the chamber 140 by the partition W .

The chamber 140 is configured to communicate with a space provided with the first and second gears 120 and 130 through a first communication hole 150 formed in the partition wall W. [

The space where the chamber 140 and the gears are installed is filled with oil and the oil can be moved toward the chamber 140 through the first communication hole 150. The first communication hole 150 has a wide entrance If the outlet is narrowly formed and the pressure is increased, the perfusion rate is slowed to provide a shock-absorbing function.

In addition, a second communication hole 160 having an inlet at the side of the chamber 140 and a narrow outlet at the gear installation space is further formed to allow the pressure to be naturally dissipated when a predetermined time passes.

In addition, the chamber 140 is further provided with an oil filling port 170 to supplement the oil.

Thus, when the movable contactor 10 rotates and is folded toward the other insulator 14, the pinion gear 110 rotates in contact with the guide rack 200, which rotates the first and second gears 120 and 130 The oil is suddenly flowed in the buffer housing 100.

At the same time, since the oil does not have a place to escape, it eventually rushes to the first communication hole 150, and the buffer housing 100 slowly moves along the guide rack 200 as the pressure is increased. That is, the rotation speed is reduced and the speed is gradually reduced.

The movable contactor 10 is smoothly connected to the terminal of the other insulator 14 without impact, so that arc generation is suppressed.

In addition, when a predetermined time has elapsed, the pressure inside the shock absorbing housing 100 is naturally relieved.

As described above, the present invention has a structure capable of absorbing connection shock during the rotation of the movable contact 10, thereby making it possible to perform safer and more smooth opening and closing operations.

100: buffer housing 200: guide rack

Claims

1. A disconnecting switch opening / closing apparatus in which a disconnecting function is performed by a movable contactor (10) which is rotated from a first insulator (12) to a second insulator (14);
Shaped connection bar 60 is hingedly connected to a lower end portion of the movable contact 10;
The end of the connecting bar (60) is integrally fixed to a linear rotary shaft (70);
Both ends of the linear rotary shaft (70) are rotatably fixed by a bearing block (80);
An electric motor (50) is coupled to one end of the rotating shaft (70);
A rotation guide bar (44) is integrally projected on a part of the length of the rotation shaft (70);
A cylinder rod 42 is hingedly connected to an end of the rotation induction bar 44;
The cylinder rod 42 is connected to the hydraulic cylinder 40;
The lower end of the hydraulic cylinder 40 is rotatably and fluidically linked on a fixing member at an installation site;
A buffer housing (100) is further fixed on one side surface of the end of the movable contact (10);
A guide rack 200 having a predetermined curvature is fixed on the other insulator 14, which is the side on which the movable contact 10 is rotated;
A pinion gear 110, which can be engaged with the guide rack 200, is fixed to an outer side surface of the buffer housing 100;
An internal first gear 120 coaxial with the pinion gear 110 is provided in the buffer housing 100;
The inner first gear 120 is meshed with the inner second gear 130;
The internal first and second gears 120 and 130 are partitioned from the chamber 140 by the partition W,
The chamber 140 is configured to communicate with a space in which the first and second gears 120 and 130 are installed through a first communication hole 150 formed in the partition W,
The space in which the chamber 140 and the first and second gears 120 and 130 are installed is filled with oil.
A second communication hole 160 having an inlet at the side of the chamber 140 and a narrow outlet at a side of the first and second gears 120 and 130 is formed;
Wherein the chamber (140) is further provided with an oil filling port (170) to supplement the oil.

The method of claim 1,
Wherein the first communication hole (150) is configured to have a wide inlet and a narrow outlet and to have a shock-absorbing function by slowing a perfusion rate when a pressure is greatly increased.