KR102484700B1 - Gas Insulated Circuit Breaker - Google Patents

Abstract

The present invention relates to a gas insulated circuit breaker capable of imparting flexibility to operating characteristics while using low mechanical energy. a movable part disposed to face the fixing part and movable to be connected to or separated from the fixing part; a drive-side arc contact provided on the movable part and operating in sync with the movement of the movable part; a driven-side arc contact disposed in the fixing part to face the driving-side arc contact and operating in a direction opposite to the moving direction of the movable part so that one end is connectable or detachable to the driving-side arc contact; a rack gear connected to the movable part to receive a driving force; a first pinion gear having a rotating shaft installed in the fixing part and rotating in mesh with the rack gear; and a cam member that is connected to the rotating shaft and rotates, and is installed to come into contact with the driven-side arc contact to operate the driven-side arc contact.

Description

Gas Insulated Circuit Breaker}

The present invention relates to a gas insulated circuit breaker capable of imparting complete flexibility to performance-defining operating characteristics while using low mechanical energy.

In the high-voltage gas insulated circuit breaker, the dual motion circuit breaker is configured so that the arc contact on the driven side of the fixed part moves in the opposite direction to the moving direction of the moving part in conjunction with the operation of the moving part, so that the gap between the arc contacts It is a gas insulated circuit breaker with improved arc extinguishing performance and blocking performance by increasing

Among these dual motion breakers, there is a breaker that implements dual motion using a link and a lever. Such a link and lever structure has a disadvantage in that the design is complicated, and thus it is difficult to change the operating characteristics of the circuit breaker, such as the movement speed and operation type of the driven arc contact, according to the specifications of the circuit breaker.

In addition, the link and lever structure requires a large space inside the fixing part, and interference between the link, lever, and conductor may occur, resulting in a case in which stable operation may not be performed, and there is a risk of component damage due to severe vibration.

On the other hand, the gas insulated circuit breaker is required to realize the desired movement speed with a small driving force, and it is advantageous for arc extinguishing performance that the contact point moves at a high speed at the moment the contact is separated or contacted during the blocking and closing operation, and the contact After complete separation or complete contact, it is beneficial for product life to reduce the movement speed of the contact to alleviate the impact between parts.

(Patent Document 1) KR 1207497 B1

Accordingly, an object of the present invention is to provide a gas insulated circuit breaker capable of imparting complete flexibility to operating characteristics defining performance while using low mechanical energy.

A gas insulated circuit breaker according to an embodiment of the present invention includes a fixing part constituting an energization path; a movable part disposed to face the fixing part and movable to be connected to or separated from the fixing part; a drive-side arc contact provided on the movable part and operating in sync with the movement of the movable part; a driven-side arc contact disposed in the fixing part to face the driving-side arc contact and operating in a direction opposite to the moving direction of the movable part so that one end is connectable or detachable to the driving-side arc contact; a rack gear connected to the movable part to receive a driving force; a first pinion gear having a rotating shaft installed in the fixing part and rotating in mesh with the rack gear; and a cam member connected to the rotating shaft to rotate and installed to come into contact with the driven-side arc contact to operate the driven-side arc contact, wherein the cam member is formed eccentrically on one side of the cam member and the first 1 Through hole into which the rotation axis of the pinion gear is inserted; an internal gear formed on an inner circumferential surface of the through hole; and a second pinion gear formed on an outer circumferential surface of the rotating shaft inserted into the through hole and meshed with the internal gear.
A gas insulated circuit breaker according to another embodiment of the present invention includes a fixing part constituting an energization path; a movable part disposed to face the fixing part and movable to be connected to or separated from the fixing part; a drive-side arc contact provided on the movable part and operating in sync with the movement of the movable part; a driven-side arc contact that is disposed to face the driving-side arc contact within the fixing part, and operates in a direction opposite to the moving direction of the movable part, so that one end is connectable to or detachable from the driving-side arc contact; a rack gear connected to the movable part to receive a driving force; a first pinion gear having a rotating shaft installed in the fixing part and rotating in mesh with the rack gear; and a cam member connected to the rotating shaft to rotate and installed to come into contact with the driven arc contact to operate the driven arc contact, wherein when the movable part and the rack gear connected to the movable part move, the driven arc contact The contact may move and stop with a time difference between the movable part and the rack gear.

As described above, according to the present invention, since the structure for implementing dual motion is simple, the gas insulated circuit breaker can be operated using low mechanical energy, and flexibility can be given to its operating characteristics, so that the design change is easy. You can get it.

1 is a cross-sectional view showing a gas insulated circuit breaker according to an embodiment of the present invention.
Figure 2 is a perspective view showing the main part of the gas insulated circuit breaker according to an embodiment of the present invention.
3 is an enlarged plan view of the coupler shown in FIGS. 1 and 2;
4 to 6 are diagrams showing the operating state of the driven-side arc contact of the gas insulated circuit breaker according to an embodiment of the present invention.
Figure 7 is a graph schematically showing the moving distance and time of the drive-side arc contact and the driven-side arc contact of the gas insulated circuit breaker according to an embodiment of the present invention.

Hereinafter, the present invention is explained in detail through exemplary drawings. In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted.

Figure 1 is a cross-sectional view showing a gas insulated circuit breaker according to an embodiment of the present invention, Figure 2 is a perspective view showing the main part of the gas insulated circuit breaker according to an embodiment of the present invention, Figure 3 is Figures 1 and 2 This is an enlarged plan view of the coupler shown in .

As shown in Figures 1 to 3, the gas insulation circuit breaker according to an embodiment of the present invention, the fixing part (10). It may include a movable part 20, a drive-side arc contact point 21, a driven-side arc contact point 11, a rack gear 30, a first pinion gear 41, and a cam member 50.

The fixing part 10 is a cylinder-shaped conductor having an internal space and carrying a main current, and a driven-side arc contact 11, a rack gear 30, and the like may be installed in the internal space of the fixing part.

In addition, a fixed-side main contact 12 connected to the movable-side main contact 22 provided in the movable part 20 to conduct a main current may be provided at one end of the fixed part 10 .

The movable part 20 is a cylindrical conductor having an internal space and carrying a main current. In the internal space of the movable part, a thermal expansion chamber 23 accommodating high-temperature insulating gas generated in the gap when a large current of the circuit breaker is cut off, and the volume is reduced in conjunction with the backward movement of the movable part when the small current of the circuit breaker is cut off and stored therein. A buffer seal 24 for supplying an insulating gas to the thermal expansion chamber may be provided.

Here, the internal space of the thermal expansion chamber 23 is in communication with the drive-side arc contact 21 so that gas flow is possible, and when the circuit breaker cuts off the current, the high-temperature insulating gas generated by the arc generated in the gap thermally expands. It can enter and accumulate at high pressure in the seal.

As described above, a movable main contact 22 connected to or separated from the fixed main contact 12 may be provided at one end of the movable part 20 .

In addition, the movable part 20 may include an operating rod 28 connected to the movable part and moving together with the movable part. One end of the operating rod is provided with a drive-side arc contact 21, and the other end is connected to a drive unit 29.

The movable part 20 is disposed to face the fixed part 10, and may move forward and be connected to the fixed part 10 by the driving force of the driving unit 29, or move backward and separate from the fixed part. Thus, the circuit breaker can perform closing and opening operations.

In the case where the movable part 20 is connected to the fixed part 10, the movable part together with the fixed part constitutes a conduction path of the main current.

The drive-side arc contact 21 is provided at one end of the movable part 20 and can operate in sync with the movement of the movable part. The driving-side arc contact point may be connected or separated from one end of the driven-side arc contact point 11, and may constitute a path through which an arc generated between poles flows when the circuit breaker is closed and opened.

In addition, a nozzle 26 may be installed at one end of the movable part 20 along with the movable main contact 22 and the drive-side arc contact 21 . The nozzle is formed of an insulator and is fixed to surround the drive-side arc contact 21, so that it can operate in accordance with the movement of the movable part.

The nozzle 26 can constitute a path through which gas flows between the thermal expansion chamber 23 and the gap (between the arc contact points on the driving side and the driven side). That is, the nozzle constitutes a path through which the insulating gas generated in the gap is introduced into the thermal expansion chamber and a path through which the insulating gas in the thermal expansion chamber is injected into the gap.

The driven-side arc contact 11 is disposed in the inner space of the fixed part 10, and as described above, the drive-side arc contact 21 provided in the movable part 20 and one end thereof can be connected or separated, and the circuit breaker When closing and opening of the arc, it is possible to configure the conduction path of the arc generated in the gap.

The driven-side arc contact 11 is connected to the drive-side arc contact 21 prior to the connection between the fixed-side main contact 12 and the movable-side main contact 22 when the circuit breaker is closed, that is, the movable part 20 moves forward. On the other hand, it is separated from the driving side arc contact later than the separation between the fixed side main contact and the movable side main contact during the opening of the circuit breaker, that is, the separation between the main contact on the movable side and the opening of the breaker, thereby forming a conduction path for the arc generated in the gap. It is possible to prevent conduction between the fixed-side main contact and the movable-side main contact.

Specifically, the driven-side arc contact 11 may be connected to or disconnected from the drive-side arc contact 21 by operating in the opposite direction to the moving direction of the movable part in conjunction with the forward or backward motion of the movable part 20 . Therefore, the driven-side arc contact can operate in dual motion interlocking with the operation of the movable part.

In other words, in the gas insulated circuit breaker according to an embodiment of the present invention, the driving force of the movable part 20 may be transmitted to the driven arc contact 11 to move the driven arc contact.

For this dual motion, the rack gear 30 may be connected to the movable part 20 to receive a driving force. In addition, the rack gear may be engaged with the first pinion gear 41 installed in the fixing part 10 to rotate the first pinion gear. Thus, the linear reciprocating motion of the rack gear can be converted into the rotational motion of the first pinion gear.

In addition, one end of the rack gear 30 may be fixedly coupled to the end of the nozzle 26 to minimize the influence of the main current and the arc. Optionally, one end of the rack gear may be coupled to the nozzle via a ring member 27 mounted at an end of the nozzle.

The rack gear 30 may have a substantially bar shape extending in parallel with the driven-side arc contact 11 and penetrating the inner space of the fixing part 10 . A plurality of gear teeth may be formed along the longitudinal direction of the bar on one side of the bar.

As shown in FIG. 2, the rack gear 30 may be provided in pairs to stably operate the driven-side arc contact 11 without deflection and may be symmetrically disposed on both sides of the driven-side arc contact, but must be It is not limited to this.

The first pinion gear 41 may include a rotating shaft 40, the first pinion gear may be fixedly coupled to the rotating shaft, or the first pinion gear may be integrally formed on an outer circumferential surface of the rotating shaft.

The position of the first pinion gear 41 may be fixed and supported by the rotating shaft 40 being rotatably installed in the frame 13 mounted on the other end of the fixing part 10 .

As shown in FIG. 2 , when the rack gears 30 are provided in pairs, it is natural that the first pinion gears 41 are also provided in pairs and arranged symmetrically. At this time, the pair of first pinion gears may be coaxially disposed on one rotational shaft 40, and accordingly, the pair of first pinion gears may rotate at the same rotational speed as each other.

The cam member 50 is connected to the rotation shaft 40 of the first pinion gear 41 to be rotatable, and is installed to contact the other end of the driven-side arc contact 11 to move the driven-side arc contact. Thus, the rotational motion of the cam member can be converted into linear reciprocating motion of the arc contact on the driven side.

In other words, the driven-side arc contact 11 is in contact with and supported by the cam member 50 and can move linearly according to the rotation of the cam member.

Since the rotating shaft 40 of the first pinion gear 41 is rotatably installed in the frame 13 mounted on the other end of the fixing part 10, the cam member 50 is rotatably outside the fixing part. can be placed.

The cam member 50 performs the forward or backward motion of the movable part 20 by the driving force of the driving unit 29, the movement of the rack gear 30 connected to the movable part, and the first pinion gear 41 meshed with the rack gear. It is connected to the rotation of, and the rotational shaft 40 of the first pinion gear, according to the rotation of the rotational shaft, can be rotated clockwise or counterclockwise. Fundamentally, the cam member can be passively rotated by the driving unit.

Optionally, the cam member 50 is formed eccentrically on one side of the cam member and the rotation shaft 40 of the first pinion gear 41 is inserted through hole 51; an internal gear 52 having a plurality of gear teeth formed at equal intervals along the circumferential direction on the inner circumferential surface of the through hole; and a second pinion gear 42 having a plurality of gear teeth formed at equal intervals along a circumferential direction on an outer circumferential surface of the rotating shaft inserted into the through hole and meshing with the internal gear.

In this case, as the rotating shaft 40 of the first pinion gear 41 rotates, the second pinion gear 42 provided on the rotating shaft rotates, and the rotation of the second pinion gear is driven by the internal gear 52. By being transmitted, the cam member 50 integrated with the internal gear can be rotated.

Here, by making the number of gear teeth of the internal gear 52 and the number of gear teeth of the second pinion gear 42 different, it is possible to determine a reduction ratio representing the number of input revolutions to the number of output revolutions.

As a result, it is possible to provide a reducer without increasing the size of the entire device compared to the case where a reducer having an external gear or the like is applied. This reducer can output torque proportional to the reduction ratio by reducing the rotational speed of the cam member 50 compared to the rotational shaft 40 of the first pinion gear 41 or the second pinion gear 42, and thus a small driving force. As a result, the desired movement speed of the driven arc contact 11 can be realized.

In addition, since the gear teeth of the internal gear 52 and the second pinion gear 42 are installed to be engaged with each other, sliding between the surfaces of the rotating components is prevented, thereby accurately and reliably transmitting and converting rotational motion. .

As shown in FIG. 2, the rack gear 30 and the first pinion gear 41 are provided in pairs and are symmetrically arranged, and the cam member 50 and the internal gear 52 are in the middle of the pair. By disposing the two-pinion gear 42, the gas insulated circuit breaker according to an embodiment of the present invention can balance the device to minimize side force, which can reduce vibration of the circuit breaker during operation. enable you to obtain the advantages of

Optionally, the cam member 50 may further include a flange 53 extending in the thickness direction of the cam member at an outer circumferential end for stable contact with the driven-side arc contact 11.

The gas insulated circuit breaker according to an embodiment of the present invention may further include a coupler 60 installed to maintain a connection with the cam member 50 at the other end of the driven arc contact 11 and support the cam member. there is.

The coupler 60 includes a bracket 61 coupled to the other end of the driven-side arc contact 11; A first roller member 62 rotatably installed relatively adjacent to the driven-side arc contact 11 in this bracket; and a second roller member 63 rotatably installed farther from the arc contact on the driven side than the first roller member in the bracket.

The flange 53 of the cam member 50 may pass through the bracket 61 of the coupler 60, and the flange may pass between the first roller member 62 and the second roller member 63. A first roller member is in rolling contact with the outer circumferential surface of the flange (a surface located radially outward of the cam member). A second roller member is in rolling contact with the inner circumferential surface of the flange (a surface located radially inward of the cam member).

3, a pair of extensions 64 are formed, a bracket 61 having a substantially U shape when viewed from above, two first roller members 62 and two second rollers disposed on each extension A coupler 60 including a member 63 is illustrated. At this time, the flanges 53 of the cam member 50 extend to both sides in the thickness direction of the cam member.

Also, optionally, a rotating plate 65 is installed on the bracket 61 of the coupler 60 to be rotatable freely, and the first roller member 62 and the second roller member 63 are spaced apart from each other on the rotating plate. can be fitted When a pair of extensions 64 are formed on the bracket, a rotating plate may be rotatably installed on each extension.

Since the coupler 60 has a rotating plate 65 freely rotatable within the bracket 61, the positions of the first roller member 62 and the second roller member 63 are adjusted according to the shape of the cam member 50. can be regulated. The first roller member and the second roller member can closely follow the flange 53 of the cam member 50.

The first roller member 62 and the second roller member 63 are provided on the cam member and the driven side so that the rotational force of the cam member 50 is smoothly transferred to the driving force for the linear reciprocating motion of the driven arc contact 11, respectively. It can perform a function of reducing the frictional force between the arc contacts.

In addition, the first roller member 62 can apply a pushing force from the cam member 50 to the driven arc contact 11, and the second roller member 63 moves toward the cam member with respect to the driven arc contact 11. pulling force can be applied.

For example, while the separation between the movable part 20 and the fixed part 10 is being accelerated to open the circuit breaker, the inner peripheral surface of the flange 53 of the cam member 50 is relatively close to the second roller member 63. In close contact, a radially inward pulling force of the cam member is applied to the second roller member, whereby a pulling force can be applied to the driven arc contact 11 together with the coupler 60.

Accordingly, since the driven-side arc contact 11 can always be kept in contact with the cam member 50, the driven-side arc contact can linearly reciprocate according to the rotation of the cam member.

Due to this configuration, in the gas insulated circuit breaker according to an embodiment of the present invention, the driven arc contact 11 can be operated in conjunction with the operation of the movable part 20, so that dual motion can be implemented. It will be.

On the other hand, in the configuration of the gas insulated circuit breaker according to an embodiment of the present invention, the rack gear 30, the first pinion gear 41, the second pinion gear 42, the cam member 50 and the coupler 60 are It can be made of an insulator that does not conduct current. In this case, the main current may flow from the driven-side arc contact 11 to the fixing part 10 through a separate means not shown.

In addition, a protective housing (not shown) is coupled to the fixing part 10 to secure the rack gear 30, the first pinion gear 41, the second pinion gear 42, the cam member 50, and the coupler 60. It can also be configured to enclose and protect these components.

4 to 6 are diagrams showing the operating state of the driven-side arc contact of the gas insulated circuit breaker according to an embodiment of the present invention, Figure 7 is the drive-side arc contact of the gas insulated circuit breaker according to an embodiment of the present invention It is a graph schematically showing the moving distance and time of the arc contact on the driven side.

Referring to Figures 4 to 7, the operating state of the gas insulated circuit breaker according to an embodiment of the present invention will be described. For example, although the movable part 20 and the fixed part 10 will be mainly described when they are separated from each other, a description of an operation in which the movable part and the fixed part are connected to each other may also be included if necessary.

4 shows the position of the driven side arc contact 11 when the circuit breaker is in a closed state.

By the driving force of the driving unit 29, the movable part 20 starts to move backward to be separated from the fixed part 10 and continues to move backward.

Since one end of the rack gear 30 is connected to the nozzle 26 of the movable part 20 via the ring member 27, the rack gear continues to move in the same direction as the moving direction of the movable part together with the movable part. do. In addition, the rack gear engages with the first pinion gear 41 installed in the fixing part 10 to rotate the first pinion gear.

Therefore, when the movable part 20 moves backward to be separated from the fixed part 10, the rack gear 30 connected to the movable part moves in the same direction as the moving direction of the movable part to rotate the first pinion gear 41 and rotates The first pinion gear to be can rotate the cam member 50 connected to the rotational shaft 40 of the first pinion gear, for example, counterclockwise.

Although the rack gear 30 moves together with the movable part 20, the driven arc contact 11 does not move for a certain period of time, so that the circuit breaker can be maintained in a closed state. To this end, a first idle section A may be formed in the cam member 50 . The first idle period is for realizing the operation of time difference movement of the driven-side arc contact with respect to the movable part and the rack gear.

As shown in FIG. 4, in the first idle section A, the cam surface spaced at the maximum distance from the rotation center of the cam member is set at a predetermined distance so as not to move the driven-side arc contact 11 by the rotation of the cam member 50. It may consist of a section formed as much as the rotation angle.

For example, when the cam member 50 is directly connected to the rotation shaft 40 of the first pinion gear 41, the center of the circular cross section of the rotation shaft may be the rotation center of the cam member.

When the cam member 50 has an internal gear 52 in the through hole 51 and the second pinion gear 42 meshing with the internal gear is connected to the rotation shaft 40 of the first pinion gear 41 The center of the through hole may be the rotation center of the cam member.

In the first idle section (A), while the cam member 50 rotates to the set rotation angle, the distance from the rotation center of the cam member to the point of contact with the driven arc contact 11 is constant, and the driven arc contact moves. It is provided to inhibit motion.

Thus, in the first idle period (A), the driven side arc contact 11 cannot be moved at the same time as the moving part 20 starts to move backward, and the driven side arc contact is fixed after the position is fixed while the moving part moves backward by the set distance. It may be moved with a time difference from the movable part.

If the driven-side arc contact 11 moves simultaneously with the backward movement of the movable part 20, the driven-side arc contact 11 and the drive-side arc contact 21 are separated too quickly, resulting in an arc generated between poles. is guided to the movable main contact 22 and the fixed main contact 12, which can cause contact damage, and the arc generation time is short, so the pressure of the insulating gas generated by the arc is low. The gas pressure of the thermal expansion chamber 23 used for the arc deterioration may occur due to insufficient arc extinguishing performance and blocking performance.

In the gas insulated circuit breaker according to an embodiment of the present invention, the driven side arc contact 11 is configured to move with a time difference from the movable part 20, so that the arc generated in the gap when the circuit breaker is opened is movable side main contact 22 ) and the fixed-side main contact 12 can be minimized, and an insulating gas with sufficient pressure can be stored in the thermal expansion chamber 23.

5 shows the position of the driven side arc contact 11 when an arc occurs in the circuit breaker.

Similarly, while the movable part 20 continues to move backward, the rack gear 30 connected to the movable part moves in the same direction as the moving direction of the movable part to rotate the first pinion gear 41, and the rotated first pinion gear rotates its rotational axis. It is possible to rotate the cam member 50 connected to, for example, counterclockwise.

The driven-side arc contact 11 starts to move, and for this, a variable section B may be formed in the cam member 50. This variable section is for converting the rotational motion of the cam member into linear reciprocating motion of the driven-side arc contact. The variable period may be formed subsequent to the first idle period (A).

As shown in FIG. 5, the variable section B is the center of rotation of the cam member so that the driven arc contact 11 can be moved in the opposite direction to the moving direction of the movable part 20 by the rotation of the cam member 50. It may be formed as a section in which the distance from to the cam surface is variable.

Since the distance from the rotation center of the cam member to the point of contact with the driven arc contact 11 is variable while the cam member 50 rotates to the set rotation angle in the variable section B, the driven arc contact The roller member 62 or 63 of the coupler 60 can move along the flange 53 of the cam member in the variable section according to the rotation of the cam member and move according to the rotational direction of the cam member.

In this way, when the cam member 50 is rotated counterclockwise, for example, the driven side arc contact 11 is moved by being pressed in the opposite direction to the moving direction of the movable part 20 by the variable section A, thereby moving the driven side The arc contact point 11 and the driving side arc contact point 21 may be separated from each other.

6 shows the position of the driven-side arc contact 11 when the circuit breaker is in an open state.

While the movable part 20 continues to move backward, the rack gear 30 connected to the movable part moves in the same direction as the moving direction of the movable part to rotate the first pinion gear 41, and the rotated first pinion gear rotates the rotation shaft 40 ) It is possible to rotate the cam member 50 connected to, for example, counterclockwise.

Although the rack gear 30 moves together with the movable part 20, the driven arc contact 11 does not move, so that the circuit breaker can be maintained in an open state. To this end, a second idle section C may be formed in the cam member 50 . The second idle period is for realizing time difference stop operation of the driven-side arc contact with respect to the movable part and the rack gear. The second idle section may be formed subsequent to the variable section (B).

As shown in FIG. 6, the second idle section (C) has a cam surface spaced at a minimum distance from the rotation center of the cam member so as not to move the driven arc contact 11 by the rotation of the cam member 50. It may consist of a section formed as much as the rotation angle.

In the second idle period (C), while the cam member 50 rotates to the set rotation angle, the distance from the rotation center of the cam member to the point of contact with the driven arc contact 11 is constant, and the driven arc contact moves. It is provided to inhibit motion.

Accordingly, in the second idle period C, the moving speed of the driven arc contact 11 is reduced before the moving part 20 moves backward, and the moving part can be stopped with a time difference.

In the gas insulated circuit breaker according to an embodiment of the present invention, the driven-side arc contact 11 is configured to first stop with a time difference from the moving part 20, so that the driven-side arc contact at the end of the movement is stably stabilized while the shock is alleviated. You can place it anywhere you want.

In addition, when the circuit breaker is opened, the point at which the arc generated in the gap is extinguished is extended and the pressure of the insulating gas generated in the gap is increased, so that the insulating gas having sufficient pressure can be stored in the thermal expansion chamber 23 .

When the opening of the circuit breaker is completed, the driven-side arc contact 11 is continuously stopped at the movement end point and can maintain a state separated from the drive-side arc contact 21.

When the movable part 20 and the fixed part 10 are connected to each other, the process described above may be performed in the reverse order and reverse direction. However, while the movable part advances by the set distance in the second idle period (C), the driven side arc contact 11 can be moved with a time difference from the movable part after the position is fixed, and in the first idle period (A), the The same side arc contact can be stopped first with a time difference from the moving part.

As described above, in the present invention, the moving speed of the driven-side arc contact 11 can be changed for each section by using the difference in shape of the cam member for each section.

Referring to FIG. 7 , it can be seen that the movable part 20 (and the rack gear 30) are moving at a substantially constant speed. On the other hand, the driven-side arc contact 11 is stopped in each of the idle sections A and C, and the moving speed is varied in a curved shape in the variable section B.

As described above, according to the present invention, the dual motion can be simply implemented with a cam member and a gear, so manufacturing is easy, and flexibility of the dual motion is easier to obtain than the conventional link and lever structure, and operation reliability is high.

In addition, according to the present invention, the drive-side arc contact and the driven-side arc contact of the movable unit can move independently in a specific form while interlocking with each other, so that complete flexibility can be given to the operating characteristics.

In addition, according to the present invention, it is possible to obtain a desired moving speed with a small driving force during separation or contact, and accordingly, the cost of the entire circuit breaker can be reduced.

In addition, according to the present invention, by adopting a gear, it is possible to provide a compact circuit breaker with a small space as well as guarantee mechanical stability without slipping. Moreover, a smaller breaker can allow better outflow of the arc area through the nozzle.

In addition, according to the present invention, there is an effect that the operational characteristics of the circuit breaker can be easily changed through replacement or processing of the cam member.

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

10: fixing part 11: arc contact on the driven side
12: fixed side main contact 13: frame
20: moving part 21: driving side arc contact
22: movable main contact 26: nozzle
27: ring member 29: drive unit
30: rack gear 40: rotational shaft
41: first pinion gear 42: second pinion gear
50: cam member 51: through hole
52: internal gear 53: flange
60: coupler 61: bracket
62: first roller member 63: second roller member
64: extension part 65: rotating plate
A: first idle section B: variable section
C: Second idle section

Claims (11)

a fixing part constituting an energization path;
a movable part disposed to face the fixing part and movable to be connected to or separated from the fixing part;
a drive-side arc contact provided on the movable part and operating in sync with the movement of the movable part;
a driven-side arc contact disposed in the fixing part to face the driving-side arc contact and operating in a direction opposite to the moving direction of the movable part so that one end is connectable or detachable to the driving-side arc contact;
a rack gear connected to the movable part to receive a driving force;
a first pinion gear having a rotating shaft installed in the fixing part and rotating in mesh with the rack gear; and
A cam member connected to the rotating shaft to rotate and installed to come into contact with the driven-side arc contact to operate the driven-side arc contact
including,
The cam member,
a through hole formed eccentrically on one side of the cam member and into which the rotation shaft of the first pinion gear is inserted;
an internal gear formed on an inner circumferential surface of the through hole; and
A second pinion gear formed on the outer circumferential surface of the rotating shaft inserted into the through hole and engaged with the internal gear
A gas insulated circuit breaker comprising a.
According to claim 1,
The movable part includes a nozzle fixed to one end so as to surround the driving-side arc contact,
One end of the rack gear is coupled to the nozzle via a ring member mounted at the end of the nozzle.
delete According to claim 1,
The cam member, gas insulated circuit breaker including a flange extending in the thickness direction of the cam member.
According to claim 4,
At the other end of the driven-side arc contact, the gas insulated circuit breaker further comprises a coupler installed to maintain the connection with the cam member and support the cam member.
According to claim 5,
The coupler,
a bracket coupled to the other end of the driven-side arc contact;
a first roller member installed rotatably adjacent to the driven-side arc contact in the bracket; and
A second roller member rotatably installed in the bracket farther from the driven-side arc contact than the first roller member.
A gas insulated circuit breaker comprising a.
According to claim 6,
The flange of the cam member passes between the first roller member and the second roller member,
The first roller member is in rolling contact with the outer circumferential surface of the flange,
Gas insulated circuit breaker in which the second roller member is in rolling contact with the inner circumferential surface of the flange.
According to claim 6,
A rotating plate is installed on the bracket to be freely rotatable,
The gas insulated circuit breaker on which the first roller member and the second roller member are mounted spaced apart from each other on the rotating plate.
a fixing part constituting an energization path;
a movable part disposed to face the fixing part and movable to be connected to or separated from the fixing part;
a drive-side arc contact provided on the movable part and operating in sync with the movement of the movable part;
a driven-side arc contact disposed in the fixing part to face the driving-side arc contact and operating in a direction opposite to the moving direction of the movable part so that one end is connectable or detachable to the driving-side arc contact;
a rack gear connected to the movable part to receive a driving force;
a first pinion gear having a rotating shaft installed in the fixing part and rotating in mesh with the rack gear; and
A cam member connected to the rotating shaft to rotate and installed to come into contact with the driven-side arc contact to operate the driven-side arc contact
including,
When the movable part and the rack gear connected to the movable part move, the driven arc contact moves and stops with a time difference with respect to the movable part and the rack gear.
According to claim 9,
The cam member,
a first idle section configured to implement a movement operation with a time difference of the driven-side arc contact with respect to the movable part and the rack gear;
a variable section formed to convert the rotational motion of the cam member into a linear reciprocating motion of the driven-side arc contact following the first idle section; and
Following the variable section, a second idle section formed to implement a time difference stop operation of the driven-side arc contact with respect to the movable part and the rack gear.
A gas insulated circuit breaker including a.
According to claim 10,
The first idle section is a section in which a cam surface spaced apart by a maximum distance from the rotation center of the cam member is formed by a predetermined rotation angle,
The variable section is a section in which the distance from the rotation center of the cam member to the cam surface is varied,
The second idle section is a gas insulated circuit breaker in which a cam surface spaced at a minimum distance from the rotation center of the cam member is formed by a predetermined rotation angle.

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