KR101739005B1 - Spring operation device of circuit breaker - Google Patents

Abstract

The present invention relates to a spring actuator for a circuit breaker. The present invention includes a main rotation shaft 60 interlocked with the main drive unit 30 and connected to the breaker 100 at one side thereof and a closing spring 75 connected to the main drive unit 30 for performing the closing operation, An opening spring 75 connected to the main rotation shaft 60 and configured to open and close the first and second springs 87 and 89 having different lengths, 87,89) devices. The first spring 87 and the second spring 89 are installed concentrically to the open springs 87 and 89. In the present invention, since the first spring 87 and the second spring 89 having different lengths are connected in parallel to form the open springs 87 and 89, The spring 87 and the second spring 89 are operated together to perform an opening operation at a high speed and thereafter only the first spring 87 is operated so that unnecessary impact or driving force is not applied to other parts of the spring actuator Do not.

Description

[0001] The present invention relates to a spring operation device for a circuit breaker,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a spring actuator for a circuit breaker, and more particularly, to a spring actuator for a circuit breaker which is constructed by a double spring to enable rapid operation at the beginning of an open operation.

In general, gas insulated switchgear (GIS) is a waterproofing facility which improves the reliability by inserting conductors and various protective devices by using insulated gas, which is excellent in insulation performance and SOHO function, in an airtight container made of metal, , A ground switch, and the like.

Among these structures, the breaker is to protect the power system by not only opening and closing the steady state of the gas insulated switchgear, but also by blocking the system fault current even in the abnormal state such as the ground fault, short circuit and accident of the line.

Such a circuit breaker allows the power source to be quickly cut off in the event of an abnormal state, and a selective closing operation and an open operation of the breaker can be performed by a spring actuator using a plurality of springs.

In the conventional circuit breaker, an open spring used for the open operation and a close spring used for the closing operation are provided, and these open / close operations can be performed while restoring (loosening) in the open operation and the closing operation, respectively.

Particularly, due to the characteristics of the circuit breaker, the performance for blocking the circuit at a high speed is very important. For this purpose, the elasticity of the open spring can be increased. However, the elasticity of the open spring increases, which may cause a problem in the durability of the component due to an unnecessary force applied to other parts during the open operation.

In this case, since the durability of the circuit breaker may be reduced due to excessive energy applied by the closing spring during the closing operation, a dashpot is installed to provide a buffering effect. However, such a plurality of devices make it difficult to downsize the circuit breaker.

Korea Patent Publication No. 10-2011-0101610 Korean Patent No. 10-802909

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide an electric power supply device capable of rapidly shutting off an electric power at the initial stage of an opening operation by an open spring.

Another object of the present invention is to provide a miniaturized spring actuator.

According to an aspect of the present invention, there is provided a method of driving an electronic apparatus, including a main rotation shaft interlocked with a main driving unit and connected to a breaker at one side thereof, and a closing spring connected to the main driving unit, And an open spring device connected to the main rotation shaft to perform an opening operation and having first and second springs having different lengths in parallel, wherein the open spring device comprises a fixing plate, A first spring having both ends connected to the fixed plate and the movable plate, one end connected to the fixed plate, and the other end connected to the movable plate, And a second spring formed to be shorter in length than the first spring, wherein the first spring It is provided to a second spring concentrically wrapped around the second spring.

The main driving unit is provided with a charging device, and the charging device selectively compresses the closing spring.

The first spring and the second spring of the open spring device are respectively compressed with a time difference during the closing operation of the circuit breaker by the close spring device.

An open shock absorber is provided on the main rotation shaft to perform a damping function in an open operation.

According to the spring actuator for a circuit breaker according to the present invention, the following effects can be expected.

In the present invention, since the first spring and the second spring having different lengths are connected in parallel to constitute the open spring, the first spring and the second spring work together at the initial stage of opening operation, The operation is performed to improve the breaking performance of the breaker, and thereafter, only the first spring is operated, so that the durability of the spring actuator can be improved since unnecessary impact or driving force is not added to other parts of the spring actuator.

Particularly, in the present invention, since the initial speed of the open operation can be improved by adding the second spring to the open spring without largely changing the configuration of the existing breaker, it is possible to easily design the circuit breaker for improving the open operation performance, You can create a new spring actuator with improved performance at a cost.

In the present invention, since the second spring of the open spring serves as a kind of damper (dash port) for shock absorption during the closing operation, there is an effect that the operation stability of the spring actuator is improved by absorbing the impact during the closing operation.

In addition, since the second spring of the open spring functions as a damper, the conventional damper for closing or the dash port can be omitted, so that the structure of the spring actuator can be simplified and the manufacturing cost can be reduced. It is possible to reduce the size of the spring manipulator and to increase the degree of freedom of design.

1 is a conceptual diagram showing a configuration of a preferred embodiment of a spring actuator for a circuit breaker according to the present invention;
Fig. 2 (a) and Fig. 2 (b) are front views showing examples of the open springs constituting the present invention.
FIG. 3 is an operation state diagram showing a process of elastically deforming by an external force in a state where an open spring constituting an embodiment of the present invention is restored.
4 is a conceptual diagram showing an initial state in which both the closing spring and the open spring constituting the embodiment of the present invention are relaxed.
5 is a conceptual view showing a state in which an open spring constituting an embodiment of the present invention is elastically deformed.
FIG. 6 is a conceptual view showing a state in which both the closing spring and the open spring constituting the embodiment of the present invention are elastically deformed. FIG.
7 is a conceptual view showing a state in which an open spring constituting an embodiment of the present invention is restored and a circuit breaker is opened.
8 is a conceptual view showing a state in which a closing spring constituting an embodiment of the present invention is restored and a circuit breaker is inserted.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals even though they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

Fig. 1 is a conceptual diagram showing a configuration of a preferred embodiment of a spring actuator for a circuit breaker according to the present invention.

The spring manipulator of the present invention is provided with the drive source (10). The drive source 10 provides the power required to drive the gear assembly 20 and the main drive 30 connected thereto, which will be described below. For example, the driving source 10 may be a motor using electricity. However, the driving source 10 driven in various manners may be used.

The driving source 10 can elastically deform the closing spring 75 to be described below by rotating the gear assembly 20 mounted on the output shaft of the driving source 10 and the main driving unit 30 connected thereto. The gear assembly 20 may be a speed reducer that decelerates the driving force of the driving source 10. The drive source 10 and the gear assembly 20 may be regarded as a charging device.

The main drive unit 30 is connected to the driving source 10 of the spring manipulator via the gear assembly 20. The main drive unit 30 has a disc shape, and gears are used in this embodiment. The main driving unit 30 may be rotated by the driving force of the driving source 10 and the closing spring 75. When the gear is used as the main driving unit 30, the driving force of the motor, which is the driving source 10, is transmitted in a decelerated state by the gear assembly 20.

On the outer surface of one side of the main driving part 30, a closing spring connecting part 75 is located at a predetermined distance from the center of rotation of the main driving part 30. Both ends of the close spring connection portion 75 are connected to the main drive portion 30 and a first movable plate 73 of a close spring device 70 to be described later so that the rotational force of the main drive portion 30, (75).

The main driver 30 is provided with a close latch device 200. The close latch device 200 is a series of arrangements for keeping the closing spring 75 in a state of being elastically deformed, that is, in a closed state or allowing the circuit breaker 100 to perform the closing operation. The closed latch device 200 is composed of a plurality of springs and levers, and is well known in the applicant's patent 10-942567, and is generally used in a spring actuator, so a detailed description of the structure will be omitted.

A cam 40 and a cam follower 50 are provided on the rotation axis of the main driving unit 30. The cam 40 is installed on the rotating shaft of the main driving unit 30 and rotates together with the main driving unit 30. [ The cam follower 50 interlocks with the rotation of the cam 40 and is provided in the main rotation shaft 60 to be described below to transmit the rotational force of the cam 40 to the main rotation shaft 60 . That is, the power transmission for compressing and relaxing the open spring device 80 and the close spring device 70 to be described later is performed by using the cam 40 and the cam follower 50 corresponding thereto. Here, since the cam 40 and the cam follower 50 are generally used, a detailed description thereof will be omitted.

The shaft body 61 of the main rotation shaft 60 to which the cam follower 50 is connected is provided with a lever. The lever is rotated together with the shaft body 61. In this embodiment, the lever includes an opening / closing lever 63 for selectively interrupting the circuit breaker 100, and a connection / And a buffer lever 65 for guiding the buffer lever 65. Of course, the opening / closing lever 63 and the buffer lever 65 may be constituted as one, or the buffer lever 65 may be omitted.

When the opening and closing lever 63 is rotated together with the main rotation shaft 60, the breaker 100 is operated to open or close the breaker 100. The opening and closing lever 63, The circuit breaker 100 is turned on and the circuit breaker 100 is opened when the circuit breaker 100 is rotated in a counterclockwise direction. Since the circuit breaker 100 is a kind of switch and is generally used, a detailed description of the structure will be omitted.

The open / close lever 63 is provided with an open latch device 300. The open latch device 300 is a series of configurations in which the open springs 87 and 89 are elastically deformed, that is, the closed state is maintained or the elastically deformed state is released so that the circuit breaker 100 performs the open operation. Since the open latch device 300 is generally used in a spring operation device like the close latch device 200, a detailed description of the structure will be omitted.

The main driving unit 30 is provided with a closed spring device 70. The close spring device 70 is installed in the main drive part 30. The closing spring 75 included in the close spring device 70 elastically deforms and compresses to have elastic energy. When the closed spring device 70 is in a predetermined condition, do. Then, the driving force closes the circuit breaker 100 to make the closing state.

As shown in FIG. 1, the close spring device 70 includes a first fixed plate 71 which is fixedly installed, and a second fixed plate 71 which is spaced apart from the first fixing plate 71 and moves toward or away from the first fixing plate 71 And a first movable plate 73 which is operated. At this time, the first movable plate 73 is connected to the main drive unit 30 by the close spring connection unit 75, and thereby linearly moves in conjunction with the rotation of the main drive unit 30. [

Both ends of the closing spring 75 are connected between the first fixing plate 71 and the first movable plate 73 so that the first movable plate 73 is rotated in accordance with the rotation of the main driving unit 30. [ When it is moved, it is compressed in the process and accumulates energy.

In contrast, when the closing spring 75 is restored, the main driving unit 30 is rotated through the closing spring connecting unit 75, and the main driving unit 30 rotates the main driving shaft The open springs 87 and 89 can be compressed. Reference numeral 75a denotes a portion where the closing spring 75 is connected to the first movable plate 73 and 75b denotes a portion where the closing spring 75 is connected to the main driving portion 30. [

An open spring device (80) is connected to the opening / closing lever (63) of the main rotating shaft (60). The open spring device 80 is interlocked with the opening and closing lever 63 to rotate the opening and closing lever 63 while the open springs 87 and 89 of the open spring device 80 are restored to a circular shape in the opening operation, And when the closing spring 75 is restored to its original shape, it receives the rotational force from the opening / closing lever 63 and compresses it to accumulate elastic energy.

And is connected to the opening / closing lever 63 by an open spring connecting portion 85 as shown in FIG. One end of the opening / closing lever 63 is connected to a second movable plate 83 which will be described later, and the other end is connected to the opening / closing lever 63 to interlock the opening / closing lever 63 and the open spring device 80 .

The structure of the open spring device 80 is well shown in Fig. 2 (a), the open spring device 80 is provided with a second fixing plate 81 and a second fixing plate 81 that is spaced apart from the second fixing plate 81 and is selectively and selectively arranged toward the opening / closing lever 63 of the main rotation shaft 60 A second movable plate 83 is provided. At this time, the second movable plate 83 is connected to the opening / closing lever 63 of the main rotating shaft 60 by the open spring connecting portion 85, so that the second moving plate 83 linearly moves in conjunction with the rotation of the main rotating shaft 60 .

Open springs (87, 89) are provided between the second fixing plate (81) and the second movable plate (83). The open springs 87 and 89 have a first spring 87 and a second spring 89, which have different lengths, in parallel. That is, the open springs 87 and 89 include a first spring 87 and a second spring 89. Since the open springs 87 and 89 have different lengths, they can provide different elasticity over time have.

More specifically, the first spring 87 has its both ends connected to the second fixing plate 81 and the second movable plate 83, and the second spring 89 having a relatively short length has one end The second movable plate 83 is connected to the second fixed plate 81 and the other end is not fixed to the second movable plate 83.

3, the first spring 87 and the second spring 89 are restored together when the open springs 87 and 89 are restored from the compressed initial state (Fig. 3 (a)) to a circular shape The second movable plate 83 is moved and the second spring 89 is completely restored (Fig. 3 (b)). Thereafter, only the first spring 87 is further restored and the second movable plate 83 (Fig. 3 (c)).

At the beginning of the operation of the open spring device 80, the opening / closing lever 63 is rotated by a force equivalent to the sum of the elastic forces of the first spring 87 and the second spring 89, The opening / closing lever 63 is rotated only by the elastic force of the opening / closing lever 63. Accordingly, at the initial stage of the open operation requiring a relatively large energy, the first spring 87 and the second spring 89 operate together to open the circuit breaker 100 at a high speed, By operating only the first spring 87, unnecessary impact or driving force may not be added to other parts of the spring actuator.

The first spring 87 and the second spring 89 have different lengths in order to provide different elasticity with time. The difference in the lengths of the first spring 87 and the second spring 89 causes the breaker 100 ) And the design value. For example, when a larger force is required at the beginning of the open operation, the length of the second spring 89 may be further increased, or a second spring 89 having a higher elastic modulus may be used.

As shown in FIG. 2 (a), the first spring 87 and the second spring 89 are installed concentrically to the open springs 87 and 89. That is, the first spring 87 is installed to surround the second spring 89 in the open spring device 80. 2 (b). The second spring 89 may surround the first spring 87. The first spring 87 and the second spring 89 are all formed of a cylindrical coil spring.

Although not shown, the first spring 87 and the second spring 89 are not necessarily concentric, and the first spring 87 and the second spring 89 are spaced apart from each other . That is, any structure is possible as long as the first spring 87 and the second spring 89 are formed in parallel. One end of the second spring 89 is fixed to the other side of the second fixing plate 81, that is, the other end of the second spring 89 is fixed to the second fixing plate 81. In this embodiment, 2 movable plate 83 as shown in Fig.

On the other hand, the buffer lever 65 is provided with a shock absorber 400. The shock absorber 400 is installed in the shock absorber lever 65 so as to absorb an impact generated during the opening operation of the open spring device 80. The shock absorber 400 may be composed of a damper, a dash port, or the like.

Hereinafter, the operation of the spring actuator for a circuit breaker according to the present invention will be described with reference to the drawings.

First, as shown in Fig. 4, in the initial state of the spring actuator, both the closing spring 75 and the open springs 87, 89 are relaxed without being elastically deformed. The circuit breaker 100 is in an open state.

When the main drive unit 30 rotates counterclockwise with reference to FIG. 4 by the driving force of the driving source 10 of the charging apparatus in this state, the first movable plate 73 is pulled so that the closing spring 75 And starts to be pressed against the first fixing plate 71.

Then, the open springs 87 and 89 are also compressed and pressed against the second fixing plate 81. This process can be performed by the elastic force generated while the compressed closing spring 75 is loosened. That is, when the closing spring 75 is relaxed and restored, the main driving unit 30 is rotated counterclockwise, and the cam 40 and the cam follower 50 connected to the main driving unit 30 rotate the main rotating shaft 60 is rotated in the clockwise direction, the opening and closing lever 63 pulls the second movable plate 83 of the open spring device 80 to elastically deform the opening springs 87, ). In addition, the opening / closing lever 63 rotates clockwise, so that the circuit breaker 100 is closed and the closing operation is performed. Such a state is shown in Fig.

Subsequently, the closing spring 75 is elastically deformed using the charging device in the direction of the first fixing plate 71, so that both the open springs 87 and 89 and the closing spring 75 are both pressed. In this process, since the main driving unit 30 is not interlocked with the main rotating shaft 60, the open spring unit 80 is kept in a compressed state. This means that both the closing spring 75 and the open springs 87 and 89 are elastically deformed, which means that they are waiting for operation. This is shown in FIG.

Then, when an abnormal signal is received, the open springs 87 and 89 are operated and the switch is opened. That is, when an abnormal signal is given, the open latch device (300) which has cut off the restoration of the open springs (87, 89) is released, and the open springs (87, 89) are relaxed and restored. Then, in this process, the open / close lever 63 connected to the open spring device 80 is rotated in the counterclockwise direction, so that the circuit breaker 100 is pulled and cut off. This is shown in Fig.

The open springs 87 and 89 are constituted by a first spring 87 and a second spring 89. In the initial stage of operation of the open springs 87 and 89, The first spring 87 and the second spring 89 connected to each other are simultaneously relaxed to convert the accumulated elastic energy into kinetic energy. Accordingly, the first spring 87 and the second spring 89 operate together at an initial stage of the open operation, which requires a large energy, so that the opening operation of the circuit breaker 100 is improved.

The second spring 89 is shorter than the first spring 87 so that the second spring 89 is completely restored before the first spring 87. Referring to FIG 3B, The elasticity energy is converted into kinetic energy while being restored and restored. As a result, the opening / closing lever 63 is further rotated, but its speed is reduced compared to the previous step.

3 (c), when the first spring 87 is completely restored, the open operation is completed. In this way, after the start of the open operation in which a large energy is required, only the first spring 87 is not operated unnecessarily, and thus unnecessary impact or driving force may not be added to other parts of the spring actuator.

Next, when the abnormal signal disappears, it is necessary to close the circuit breaker 100 again to turn on the power, which is accomplished by the closed spring device 70. That is, the closing latch device 200 which has cut off the restoration of the closing spring 75 of the close spring device 70 is released, and the closing spring 75 is relaxed and restored.

In this process, the closing spring 75 pushes the first movable plate 73 in a direction away from the first fixing plate 71, so that the main driving unit 30 rotates counterclockwise. The cam 40 and the cam follower 50 interlock with each other in accordance with the rotation of the main drive unit 30 to rotate the main rotation shaft 60 clockwise.

When the main rotation shaft 60 rotates in a clockwise direction, the opening / closing lever 63 rotates in a clockwise direction, and the breaker 100 is closed to supply power.

At this time, in the course of the clockwise rotation of the open / close lever 63, the open spring connection part 85 connected to the open / close lever 63 is pulled, and the second movable plate 83 ) Elastically deforms the open springs (87, 89) while moving in the direction of the second fixing plate (81). That is, not only the closing device 100 performs the closing operation by the elastic force of the closing spring 75 but also the opening springs 87 and 89 are elastically deformed.

The process in which the open springs 87 and 89 are elastically deformed and compressed is performed in the reverse order of the relaxation process of the open springs 87 and 89 described above. 3, only the first spring 87 is elastically deformed at the initial stage of compression (FIG. 3 (c)). When the first spring 87 is elastically deformed to some extent, the second movable plate 83 The second spring 89 contacts the one end of the second spring 89 and elastically deforms the second spring 89 together. It may be expressed that the first spring 87 and the second spring 89 of the open spring device 80 are respectively compressed with a time difference during the closing operation by the closed spring device 70. [

Accordingly, the force required for the elastic deformation of the open springs 87 and 89 is small at the initial stage of the closing operation and relatively large for the elastic deformation of the open springs 87 and 89 after the middle stage. Due to the structural features of the open springs 87 and 89, the second spring 89 can perform a kind of buffering function for absorbing the impact due to the elastic force of the closing spring 75 in the middle to late stages of the closing operation , So that a separate shock absorber (400) is not required in the closing operation.

Finally, when the closing operation is completed, the charging apparatus is operated again to elastically deform the restored closing spring 75. [

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by 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 scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

In the above embodiment, the open springs consist of the first spring 87 and the second spring 89, but the open springs may be constructed by connecting three or more springs having different lengths in parallel.

10: drive source 20: gear assembly
30: main drive unit 40: cam
50: cam follower 60: main rotating shaft
70: closing spring device 71: first fixing plate
73: first movable plate 75: close spring connection portion
77: closing spring 80: open spring device
81: first fixing plate 83: first movable plate
85: closing spring connecting portion 87: first spring
89: Second spring 100: Circuit breaker
200: Closed spring latch 300: Open spring latch
400: shock absorber

Claims (7)

A main rotating shaft interlocked with the main driving unit and having a circuit breaker connected to one side thereof,
A closing spring device connected to the main driving unit and having a closing spring for performing a closing operation of the circuit breaker,
And an open spring device connected to the main rotation shaft to perform an open operation of the breaker and having first and second springs having different lengths in parallel,
The open spring device
A fixing plate,
A movable plate spaced from the fixed plate and selectively movable toward the opening / closing lever of the main rotating shaft;
A first spring having both ends connected to the fixed plate and the movable plate,
And a second spring having one end connected to the fixing plate and the other end connected to the movable plate and having a relatively shorter length than the first spring,
Wherein the first spring is concentric with the second spring and is installed to surround the second spring.
delete delete delete The spring actuator for a circuit breaker according to claim 1, wherein a charging device is connected to the main drive part, and the charging device selectively compresses the closing spring.
2. The method of claim 1, wherein the first spring and the second spring of the open spring device are compressed with a time difference during a closing operation of the circuit breaker by the close spring device, Wherein the first spring and the second spring are compressed together when the movable plate of the open spring device contacts the one end of the second spring during compression of the spring.
The spring actuator for a circuit breaker according to claim 6, wherein a shock absorber is provided on the main rotation shaft to perform a damping function in an open operation.

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