KR102666103B1 - Load break switch - Google Patents

Abstract

The present invention is a load switch in which the gas inside an arc chamber passes through a rotating shaft and a puffer guide to extinguish the arc, and the puffer guide is coupled to the outer peripheral surface of the rotating shaft and can rotate together with the rotating shaft. Discloses a load switch including an insertion portion formed in a pillar shape extending in a radial direction of the rotating shaft and a barrier portion coupled to the insertion portion at a predetermined angle.

Description

Load break switch

The present invention relates to a load switch, and more specifically, to a load switch in which gas inside an arc chamber passes through a rotating shaft and a puffer guide and is extinguished.

Load break switch (LBS) refers to a component that protects the branching and division of lines and the power system by opening and closing the rated current of the electric line. Furthermore, when short-circuit protection is not required in general power circuits, load switches can be used to interrupt overload currents and ground fault currents instead of circuit breakers.

The load switch includes a fixed terminal portion that is electrically connected to an external power source and load, and a movable terminal portion that can be moved in a direction toward the fixed terminal portion or in a direction away from the fixed terminal portion.

The movable terminal part can be moved manually or automatically to contact and separate from the fixed terminal part.

When the movable terminal portion is in contact with the fixed terminal portion, the switching load is energized with the external power source and load. That is, when the movable terminal part contacts the fixed terminal part, the switching load supplies power to the load.

Conversely, when the movable terminal portion is separated from the fixed terminal portion, the load switch is disconnected from the external power source and the load, and cuts off the power supply to the load. In the above process, an arc is generated between the movable terminal portion and the fixed terminal portion.

An arc is generated when a voltage is formed between two electrodes placed with a gas in between, and refers to an electrical discharge that occurs when the gas existing between the two electrodes is converted into a current-carrying medium.

Arc is a high-temperature, high-pressure electron flow, which delays the interruption of current and may cause damage to the load switch. Therefore, rapid treatment of arcs generated during the power-off process of the load switch is required. This is called arc extinguishing.

A puffer may be formed on the rotating shaft coupled to the movable terminal portion. The puffer forms a flow path for the pressure generated as the rotating shaft rotates, and plays the role of dispersing and extinguishing the arc.

In a conventional puffer, the rear flow path is not sufficiently narrow, so some pressure may be lost through the rear flow path. In other words, it is difficult to concentrate the pressure of the fluid passing through the rear flow path.

This may have a detrimental effect on the arc induction and extension process of the load switch. In addition, this may result in damage to components of the load switch.

Therefore, the development of a load switch that can more concentrate the fluid passing through the rear flow path of the puffer may be considered.

Korean Patent Publication No. 10-1977053 discloses an arc extinguishing device for a load switch. Specifically, an arc extinguishing device for a load switch combining a puffer and an arc chute is disclosed.

However, this type of arc extinguishing device does not have a separate member to guide the arc at the inlet of the puffer. Therefore, pressure loss may occur through the rear passage of the puffer.

Korean Patent Publication No. 10-0549510 discloses a gas insulated load switch. Specifically, a gas insulated load switch with an arc chute installed on a main circuit fixed electrode is disclosed.

However, this type of gas insulated load switch does not disclose a separate arc extinguishing device other than the arc chute. In other words, there is a limit to sufficiently extinguishing the generated arc.

Korean Patent Publication No. 10-1977053 (2019.05.10.) Korean Patent Publication No. 10-0549510 (2006.02.08.)

One object of the present invention is to provide a load switch in which gas inside an arc chamber can be extinguished by passing through a rotating shaft and a puffer guide.

Another object of the present invention is to provide a load switch in which the pressure of the arc and fluid passing through the puffer guide can be concentrated.

Another object of the present invention is to provide a load switch in which the arc extension and cooling effects can be further increased when the arc is extinguished.

Another object of the present invention is to provide a load switch in which the insertion portion of the puffer guide can be more easily inserted into the housing portion, and at the same time, the insertion portion and the housing portion can be more firmly coupled.

In order to achieve the above object, a load switch according to an embodiment of the present invention includes a fixed terminal portion; Movable terminal section; a rotating shaft rotatable relative to the fixed terminal portion and capable of rotating together with the movable terminal portion; and a puffer guide having a hollow formed therein to accommodate the movable terminal portion and being coupled to the outer peripheral surface of the rotating shaft and capable of rotating together with the rotating shaft, wherein the puffer guide radiates the rotating shaft. It is formed in a pillar shape extending in a direction, and includes an insertion portion; and a barrier portion coupled to one side of the insertion portion, wherein the barrier portion includes a plurality of barrier side portions formed in a plate shape and extending in a direction away from the one side of the insertion portion. and a barrier inclined portion located between the plurality of barrier side portions, formed in a plate shape, and coupled to the insertion portion at a predetermined angle.

Additionally, a plurality of the barrier slope parts may be provided, and the different barrier slope parts may be spaced apart from each other.

Additionally, the movable terminal portion may include a movable contact point that can be contacted with or separated from the fixed terminal portion; and a movable contact base formed in a rod shape extending in a radial direction of the rotating shaft and having the movable contact point formed at one end, wherein the puffer guide accommodates the movable contact base inside and has an outside. The movable contact may be arranged.

In addition, it includes an arc chute having a plurality of arc grids spaced apart from the fixed terminal portion, wherein the arc grids include: a grid base portion formed in a plate shape; and two grid legs extending from one side of the grid base portion radially inward of the rotating shaft, wherein the grid legs have a distance between one end facing radially inward of the rotating shaft and the rotating shaft, It is formed to be smaller than the distance between the movable contact point and the rotating shaft, and a grid concave part is formed in the space between the two grid legs. The grid concave part has a width greater than the width of the movable contact point, and is formed inside the grid concave part. The movable contact can be passed through and rotated.

In addition, the puffer guide is disposed adjacent to the outer peripheral surface of the rotating shaft, is formed in a pillar shape extending radially outwardly of the rotating shaft, and includes a housing portion in which an insertion wedge is protruding from at least one surface. , an insertion groove is recessed on at least one surface of the insertion portion, the insertion groove is formed in a shape corresponding to the insertion wedge, and the insertion wedge can be slidably coupled.

In addition, on at least a portion of the outer peripheral surface of the insertion portion,

An insertion auxiliary portion may be formed that protrudes in a direction away from the outer peripheral surface and extends toward the rotating shaft.

In addition, the barrier portion includes a barrier coupling portion located adjacent to the one surface of the insertion portion, and an insertion portion through hole and a barrier through hole are formed in a portion of the insertion portion and the barrier coupling portion, respectively, and the insertion portion includes a barrier coupling portion. The through hole and the barrier through hole are disposed adjacent to each other and may be coupled by a bolt connection method.

Additionally, the barrier coupling portion may be coupled to one side of the barrier inclined portion.

Additionally, the barrier coupling portion may be coupled to one side of the barrier side portion.

Additionally, at least one surface of the insertion portion may be provided with a recessed portion formed by cutting toward the rotating shaft.

Additionally, at least a portion of the upper end of the inner peripheral surface of the insertion portion may be cut at a predetermined angle.

In addition, a load switch according to another embodiment of the present invention includes a switch unit including a fixed terminal unit and a movable terminal unit; a rotating shaft rotatable relative to the fixed terminal portion and capable of rotating together with the movable terminal portion; and a puffer guide having a hollow formed therein to accommodate the movable terminal portion, coupled to the outer peripheral surface of the rotating shaft and capable of rotating together with the rotating shaft, wherein the puffer guide extends in a radial direction of the rotating shaft. It is formed in a pillar shape and includes an insertion portion; and a barrier portion coupled to one side of the insertion portion, wherein the barrier portion includes a plurality of barrier side portions formed in a plate shape and extending in a direction away from the one side of the insertion portion. and a barrier bottom portion disposed between the different barrier side portions, connecting one end of the different barrier side portions, and coupled to the insertion portion at a predetermined angle.

Additionally, it includes an arc chute having a plurality of arc grids spaced apart from the fixed terminal portion, wherein the arc grids include: a grid base portion formed in a plate shape; and two grid legs extending radially inward from one side of the grid base portion to the inside of the rotating shaft, wherein the movable terminal portion includes a movable contact point capable of contacting or separating from the fixed terminal portion; and a movable contact base formed in a rod shape extending in a radial direction of the rotating shaft and having the movable contact point formed at one end, wherein the puffer guide accommodates the movable contact base inside and has an outside. The movable contact point is disposed, the grid leg is formed so that the distance between one end facing radially inward of the rotation shaft and the rotation shaft is smaller than the distance between the movable contact point and the rotation shaft, and the two grid legs A grid concave portion is formed in the space between the grid concave portions, the width of which is larger than that of the movable contact, and the movable contact can pass through and rotate therein.

In addition, the puffer guide is disposed adjacent to the outer peripheral surface of the rotating shaft, is formed in a pillar shape extending radially outwardly of the rotating shaft, and includes a housing portion in which an insertion wedge is protruding from at least one surface. , an insertion groove is recessed on at least one surface of the insertion portion, the insertion groove is formed in a shape corresponding to the insertion wedge, and the insertion wedge can be slidably coupled.

Additionally, an insertion assistant portion that protrudes in a direction away from the outer peripheral surface and extends toward the rotating shaft may be formed on at least a portion of the outer peripheral surface of the insertion unit.

Additionally, the barrier portion may include a barrier coupling portion that is located adjacent to the one surface of the insertion portion and extends from one end of at least one of the barrier side portion and the barrier bottom portion.

In addition, an insertion part through-hole and a barrier through-hole are formed in a portion of the insertion part and the barrier coupling part, respectively, and the insertion part through-hole and the barrier through-hole are disposed adjacent to each other and are coupled by a bolt coupling method. You can.

Among the various effects of the present invention, the effects that can be obtained through the above-described solution are as follows.

First, it is coupled with a puffer guide including a barrier portion on the rotating shaft. Specifically, the puffer guide is coupled to one side of the rotating shaft. At this time, the inner space of the rotating shaft and the inner space of the puffer guide are communicated.

The puffer guide rotates together with the rotating shaft when the rotating shaft rotates. When the rotating shaft rotates, pressure is generated. Accordingly, the arc and gas inside the arc chamber can be compressed instantaneously.

The arc and gas pass through the rotating shaft and the puffer guide, and are discharged to the other side of the rotating shaft opposite to the one side. In this process, the arc and gas pass through the puffer guide at high speed.

Therefore, when the rotating shaft rotates, the arc can pass through the puffer guide and be extinguished.

In addition, the arc and gas flowing into the rear of the puffer guide collide with the barrier portion and then flow into the internal space of the puffer guide. At this time, the arc and gas flowing into the rear of the puffer guide have a narrower flow path.

Accordingly, the pressure of the arc and gas passing through the rear of the puffer guide can be more concentrated. Accordingly, the dispersion effect of the arc can be maximized. Furthermore, the performance of arc extinguishing can be further improved.

Additionally, when the movable terminal portion is rotated, the movable contact may pass through the grid recess. At this time, the grid concave part refers to the space formed between the grid legs of the arc grid.

Accordingly, the guiding path of the arc can be moved more inward with respect to the grid recess. Accordingly, the stretching and cooling effects of the arc can be further increased. As a result, the arc extinguishing efficiency of the arc chute can be increased.

Additionally, the insertion part of the puffer guide and the housing part are combined using a slide coupling method. At this time, an insertion wedge corresponding to the insertion groove of the insertion portion is formed in the housing portion.

Accordingly, the insertion portion of the puffer guide can be more easily inserted into the housing portion. At the same time, the insertion portion of the puffer guide and the housing portion can be more firmly coupled to each other.

1 is a perspective view showing a load switch according to an embodiment of the present invention.
FIG. 2 is a front cross-sectional view showing the load switch of FIG. 1.
FIG. 3 is a front view showing a switch, a rotating shaft, an arc chute, and a puffer guide provided in the load switch of FIG. 1.
Figure 4 is a side view showing the arc chute and puffer guide of Figure 3;
FIG. 5 is a front view showing a switch and an arc chute provided in the load switch of FIG. 1.
FIG. 6 is a perspective view showing an arc chute provided in the load switch of FIG. 1.
Fig. 7 is a front view showing the arc chute of Fig. 6;
Fig. 8 is a side view showing the arc chute of Fig. 6;
Figure 9 is a perspective view showing a fastening part provided in the arc chute of Figure 6.
Figure 10 is a front view showing the fastening part of Figure 9.
Figure 11 is a side view showing the fastening part of Figure 9.
FIG. 12 is a conceptual diagram showing an arc runner and an arc grid provided in the arc chute of FIG. 6.
FIG. 13 is a perspective view showing an arc runner provided in the arc chute of FIG. 6.
FIG. 14 is a side view showing an arc grid provided in the arc chute of FIG. 6.
Figure 15 is a side view showing an arc chute according to an embodiment different from Figure 6.
FIG. 16 is a side view showing an arc grid provided in the arc chute of FIG. 15.
Figure 17 is a perspective view showing the puffer guide of Figure 3.
FIG. 18 is a side view showing the puffer guide of FIG. 17.
FIG. 19 is a plan view showing the puffer guide of FIG. 17.
Figure 20 is a perspective view showing the housing part of Figure 17.
FIG. 21 is a side view showing the housing portion of FIG. 20.
FIG. 22 is a plan view showing the housing portion of FIG. 20.
Figure 23 is a perspective view showing the insertion part of Figure 17.
FIG. 24 is a side view showing the insertion portion of FIG. 23.
FIG. 25 is a plan view showing the insertion portion of FIG. 23.
FIG. 26 is a perspective view showing the barrier portion of FIG. 17.
FIG. 27 is a side view showing the barrier portion of FIG. 26.
FIG. 28 is a plan view showing the barrier portion of FIG. 26.
Figure 29 is a side view showing an arc chute and a puffer guide according to another embodiment of the present invention.
FIG. 30 is a perspective view showing the arc chute of FIG. 29.
Fig. 31 is a side view showing the arc chute of Fig. 29;
FIG. 32 is a side view showing an arc grid provided in the arc chute of FIG. 29.
Figure 33 is a perspective view showing an insertion portion of a puffer guide according to another embodiment of the present invention.
FIG. 34 is a side view showing the insertion portion of FIG. 33.
FIG. 35 is a plan view showing the insertion portion of FIG. 33.
Figure 36 is a perspective view showing a barrier portion of a puffer guide according to another embodiment of the present invention.
FIG. 37 is a side view showing the barrier portion of FIG. 36.
FIG. 38 is a plan view showing the barrier portion of FIG. 36.
Figure 39 is a conceptual diagram showing the states (a) before arc generation and (b) after arc generation of the opening and closing unit and puffer guide according to an embodiment of the present invention.

Hereinafter, the load switch 1 according to an embodiment of the present invention will be described in more detail with reference to the drawings.

In the following description, in order to clarify the characteristics of the present invention, descriptions of some components may be omitted.

In this specification, the same reference numbers are assigned to the same components even in different embodiments, and duplicate descriptions thereof are omitted.

The attached drawings are only intended to facilitate understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the attached drawings.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

As used in the following description, the terms “upper”, “lower”, “left”, “right”, “anterior side” and “posterior side” refer to FIGS. 1, 6, 13, 17, 30, 33 and It will be understood with reference to the coordinate system shown in FIG. 36.

1. Description of the load switch (1) according to an embodiment of the present invention

Hereinafter, the load switch 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 28. However, the rotation direction of each component will be understood with reference to FIGS. 2, 3, and 5.

The load switch (1) can open and close the rated current of the converter. In other words, the load switch 1 can allow or block the current state between the external power source and the load. For this purpose, the load switch 1 is connected to an external power source and load so that electricity can be connected. In other words, the external power source and load are connected to enable electricity through the load switch (1).

When the fixed contacts 321b and 322b of the load switch 1 and the movable contact point 332 are in contact with each other, an external power source and load can be connected to enable electricity to pass through the load switch 1. Conversely, when the fixed contact points 321b and 322b and the movable contact point 332 of the load switch 1 are spaced apart from each other, the current state between the external power source and the load is blocked.

Whether the load switch 1 is opened or closed can be controlled manually or automatically. For this purpose, a separate operating unit may be coupled to the load switch (1).

Hereinafter, the configuration of the load switch 1 according to an embodiment of the present invention will be described with reference to the attached drawings, including a frame part 10, a fixing part 20, an opening and closing part 30, a rotating shaft 40, The arc chute (50) and puffer guide (60, 70) are described separately.

(1) Description of the configuration of the load switch (1)

The load switch 1 is connected to an external power source and a load to allow electricity to be passed between the power source and the load, or to block the current flow between the power source and the load. Specifically, in the load switch 1, the fixed terminal portion 320 and the movable terminal portion 330 are in contact with or spaced apart from each other, and allow or block the current state between the external power source and the load.

In one embodiment, the load switch 1 is coupled with a handle. The user can manually control whether to open or close the load switch 1 by operating the handle. In the case of the load switch 1 provided in the ring main unit (RMU), the open/closed state can be controlled by rotating the handle.

In another embodiment, an operating unit is attached to the load switch 1. The operating unit opens or closes a circuit between an external power source and a load under certain conditions. That is, whether the load switch 1 is opened or closed can be automatically controlled by the operation unit.

In the illustrated embodiment, the load switch 1 includes a frame part 10, a fixing part 20, an opening and closing part 30, a rotating shaft 40, an arc chute 50, and a puffer guide 60, 70. do.

Below, the configuration of the load switch 1 will be described in more detail with reference to the attached drawings.

(2) Description of the frame part 10 and the fixing part 20

Below, the frame unit 10 will be described with reference to FIGS. 1 and 2 .

The frame portion 10 forms the exterior of the load switch 1.

The frame portion 10 is formed in a cylindrical shape.

The outer circumference of the frame portion 10 is formed in a shape corresponding to the arc chute 50.

A through hole capable of accommodating the fixed terminal portion 320 is formed on the outer periphery of the frame portion 10. In the illustrated embodiment, vertical through holes capable of accommodating the fixed terminal portion 320 are formed on the upper and lower outer peripheral surfaces of the frame portion 10.

The frame portion 10 has a space inside that can accommodate various devices. In the space, various devices that perform the function of the load switch 1 to apply or block current transmitted from the outside can be accommodated. In the illustrated embodiment, the opening and closing part 30, the rotating shaft 40, and the puffer guide 60 are accommodated in the space.

A rotating shaft 40 coupled with the puffer guides 60 and 70 is coupled through the frame portion 10. In the illustrated embodiment, the rotating shaft 40 is coupled through the center of the frame portion 10 in the front-to-back direction. Specifically, the rotation shaft 40 is located in a straight line with the central axis of the frame portion 10.

The gas inside the frame unit 10 may be momentarily compressed by the pressure generated when the rotating shaft 40 rotates. The gas passes through the puffer guides 60 and 70 and moves in the opposite direction. In the above process, the gas may pass through the puffer guides 60 and 70 at high speed. As a result, the arc generated during the opening and closing process can be extinguished through the above process.

The fixing part 20 and the arc chute 50 are fixed and coupled to the outside of the frame part 10. In the illustrated embodiment, the fixing part 20 is coupled to the rear side of the frame part 10, and the arc chute 50 is coupled to the outer periphery of the frame part 10.

In one embodiment, the frame portion 10 may be formed of an insulating material. For example, the frame portion 10 may be formed of a synthetic resin material. Accordingly, it can be prevented from arbitrarily conducting electricity between the inside and outside of the frame portion 10. In other words, the arc, which is a flow of electrons, can be prevented from randomly leaking out of the frame portion 10.

In another embodiment, the frame portion 10 may be formed of a material having high pressure resistance and high heat resistance. Accordingly, damage to the frame portion 10 caused by arc, which is a high-temperature, high-pressure electron flow, can be prevented.

In the illustrated embodiment, the frame portion 10 includes an upper frame 110 and a lower frame 120.

The upper frame 110 forms the upper exterior of the load switch 1.

The upper frame 110 is formed in a semicylindrical shape. Specifically, the upper frame 110 has a semicylindrical shape with the curved portion facing upward. At this time, the outer circumference of the upper frame 110 is formed in a shape corresponding to the arc chute 50.

The arc chute 50 is tightly coupled to the outer peripheral surface of the upper frame 110. For this purpose, upper fastening wings (not shown) may be formed on the outer periphery of the upper frame 110. That is, the upper fastening wing portion is tightly coupled to the arc chute (50).

The upper fastening wing portion is disposed adjacent to the arc chute (50) and is inserted and coupled to the arc chute (50). In one embodiment, the upper fastening wing portion may be formed in a shape corresponding to the fastening groove 511 of the arc chute 50, which will be described later.

An upper fastening wing hole (not shown) is formed in the upper fastening wing portion. The upper fastening wing hole functions as a passage for the coupling member 520 of the arc chute 50. The coupling member 520 of the arc chute 50 passes through the upper fastening wing hole and is coupled to the upper fastening wing. That is, the coupling member 520 of the arc chute 50 is coupled through the upper fastening wing hole. In one embodiment, the coupling may be a bolt coupling method.

In addition, an upper fixed terminal receiving portion 112 capable of receiving the fixed terminal portion 320 is protrudingly formed on the outer periphery of the upper frame 110 portion 10.

The upper fixed terminal receiving portion 112 accommodates the fixed terminal portion 320 so that the fixed terminal portion 320 communicates with the outer and inner spaces of the frame portion 10.

A space capable of accommodating the fixed terminal portion 320 is formed inside the upper fixed terminal receiving portion 112. Specifically, fixed contact points 321a and 322a are accommodated in the space. That is, the fixed contact bands 321a and 322a are penetrated and coupled to the upper fixed single yarn receiving portion.

The upper fixed terminal receiving portion 112 is formed in a pillar shape with a hollow interior. In the illustrated embodiment, the upper fixed terminal receiving portion 112 extends upward from the upper outer peripheral surface of the upper frame 110.

The upper fixed terminal receiving portion 112 is arranged to surround the fixed terminal portion 320. That is, the fixed terminal portion 320 is surrounded by the upper fixed terminal receiving portion 112.

A plurality of upper fixed terminal receiving portions 112 may be provided. The number of upper fixed terminal receiving portions 112 is the same as the number of fixed terminal portions 320 coupled to the upper frame 110. In the illustrated embodiment, three pairs of upper fixed terminal receiving portions 112 are arranged side by side along the front-to-back direction.

The number of upper fixed terminal receiving portions 112 may be determined depending on the type of power system in which the load switch 1 of the present invention is provided. In one embodiment, the load switch 1 is provided in a power system using a three-phase circuit of R, S, and T phases. Accordingly, three pairs of upper fixed terminal receiving portions 112 are also provided in accordance with a three-phase circuit.

A lower frame 120 is coupled to the lower side of the upper frame 110.

The lower frame 120 forms the lower exterior of the load switch 1.

The lower frame 120 is disposed adjacent to the upper frame 110. Additionally, the lower frame 120 is disposed below the upper frame 110.

The lower frame 120 is symmetrical to the upper frame 110 with respect to the rotating shaft 40. In the illustrated embodiment, the upper frame 110 and the lower frame 120 are arranged to be vertically symmetrical with respect to the rotating shaft 40.

The lower frame 120 is formed in a semicylindrical shape. Specifically, the lower frame 120 has a semicylindrical shape with the curved portion facing downward. At this time, the outer circumference of the lower frame 120 is formed in a shape corresponding to the arc chute 50.

The upper end of the lower frame 120 is in contact with the lower end of the upper frame 110. Additionally, the upper end of the lower frame 120 is formed in a shape corresponding to the lower end of the upper frame 110.

The arc chute 50 is tightly coupled to the outer peripheral surface of the lower frame 120. For this purpose, lower fastening wings (not shown) may be formed on the outer periphery of the lower frame 120. That is, the lower fastening wing portion is tightly coupled to the arc chute (50).

A lower fastening wing hole (not shown) is formed in the lower fastening wing portion.

In addition, a lower fixed terminal receiving portion 122 capable of receiving the fixed terminal portion 320 is protrudingly formed on the outer periphery of the lower frame 120. In the illustrated embodiment, the lower fixed terminal receiving portion 122 extends downward from the lower outer peripheral surface of the lower frame 120.

The lower fixed terminal accommodating portion 122 has a function and structure corresponding to the upper fixed terminal accommodating portion 112 of the upper frame 110. Therefore, redundant explanation regarding this will be omitted.

The fixing part 20 firmly installs the frame part 10 on the main body of the ring main unit, a distribution board, etc.

The fixing part 20 is disposed adjacent to the frame part 10. In the illustrated embodiment, the fixing part 20 is disposed on the rear side of the frame part 10.

The fixing part 20 is disposed between the frame part 10 and a specific member (not shown) on which the load switch 1 is installed, and is coupled to the frame part 10 and the specific member, respectively. That is, the frame portion 10 and the specific member may be coupled by the fixing portion 20.

Accordingly, the load switch 1 can be operated while the frame portion 10 is coupled to a specific member without being separated from the specific member.

The fixing part 20 may be formed of a high-rigidity material. For example, the fixing part 20 may be made of a metal material. Accordingly, damage to the fixing part 20 and separation of the frame part 10 due to external impact can be prevented.

In the illustrated embodiment, the fixing part 20 includes a fixing plate 210 and a support 220.

The fixing plate 210 is a member through which the fixing part 20 is directly coupled to the specific member.

The fixing plate 210 is formed on one side of the fixing part 20 opposite to the frame part 10. In the illustrated embodiment, the fixing plate 210 is formed on the rear side of the fixing part 20.

The fixing plate 210 is formed in a plate shape. In one embodiment, a through hole may be formed in the center of the fixing plate 210. Accordingly, the fixing plate can be made lighter.

In the illustrated embodiment, the fixing plate 210 is formed in the shape of a rectangular plate with a through hole formed in the center. In the above embodiment, the center point of the fixing plate 210 is located on an extension of the center line of the frame portion 10.

A fixing hole 211 may be formed through the fixing plate 210.

In one embodiment, a member coupling the specific member and the fixing plate 210 may be coupled through the fixing hole 211 . At this time, it is preferable that a through hole communicating with the fixing hole 211 is formed in the specific member.

A support 220 is disposed between the fixing plate 210 and the frame portion 10.

The support 220 is disposed between the fixing plate 210 and the frame portion 10 and is coupled to the fixing plate and the frame portion 10, respectively. That is, the fixing plate and the frame portion 10 may be coupled through the support 220. Accordingly, the frame portion 10 may be spaced apart from the fixing plate 210.

The support 220 is coupled to one side of the fixing plate 210 facing the frame unit 10. Additionally, the support 220 is coupled to one side of the frame portion 10 facing the support 220. The coupling may be a bolt coupling method.

The support 220 extends in a direction toward the frame portion 10 and the fixing plate 210. In the illustrated embodiment, the support 220 extends in the front-to-back direction.

In one embodiment, a plurality of supports 220 may be provided. In the above embodiment, the plurality of supports 220 are arranged so that their center points are the same as the center point of the fixing plate 210.

(3) Description of the opening and closing part (30)

Hereinafter, the opening and closing unit 30 will be described with reference to FIGS. 2 to 5 .

The opening/closing unit 30 is accommodated in the internal space of the frame unit 10 and allows or blocks the passage of current. Specifically, the opening/closing unit 30 allows current to pass through the fixed contacts 321b and 322b and the movable contact 332, or allows the current to pass through the fixed contacts 321b and 322b and the movable contact 332 being spaced apart. Block.

A plurality of opening and closing units 30 may be provided. In the illustrated embodiment, three openings and closing units 30 are arranged side by side along the front-to-back direction.

The number of switches 30 may be determined depending on the type of power system in which the load switch 1 of the present invention is provided. When the load switch 1 is provided in a power system using a three-phase circuit of the R phase, S phase, and T phase, three switch units 30 may also be provided in accordance with the three phase circuit.

In the illustrated embodiment, the opening/closing unit 30 includes an arc chamber 310, a fixed terminal unit 320, and a movable terminal unit 330.

Arc chamber 310 may also be referred to as an “arc extinguishing section.” The arc chamber 310 extinguishes the arc generated when the fixed contact points 321b and 322b and the movable contact point 332 are separated. Specifically, the arc chamber 310 forms a space within which the arc can be extinguished.

The gas inside the space may be momentarily compressed by the pressure generated when the movable terminal portion 330 moves. At this time, the gas may pass through the puffer guides 60 and 70 and flow in a direction opposite to the direction of rotation. In the above process, gas flows through the puffer guides 60 and 70 at high speed, and an arc extinguishing operation can be performed.

The arc chamber 310 seals and accommodates the fixed terminal portion 320 and the movable terminal portion 330. That is, the fixed terminal portion 320 and the movable terminal portion 330 are accommodated inside the arc chamber 310. Accordingly, the arc generated by the fixed contact points 321b and 322b being spaced apart from the movable contact point 332 does not arbitrarily flow out to the outside of the arc chamber 310.

The fixed terminal unit 320 is electrically connected to an external power source or load. Through the fixed terminal unit 320, the load switch 1 can be connected to an external power source or load to enable electricity to be connected.

A portion of the fixed terminal portion 320 is accommodated inside the arc chamber 310.

The fixed terminal portion 320 may be formed of a conductive material. For example, the fixed terminal portion 320 may be formed of copper (Cu), silver (Ag), or the like.

In addition, a portion of the fixed terminal portion 320 may be accommodated in the inner space of the frame portion 10 to allow or block energization between the inside and outside of the load switch 1. Specifically, the fixed terminal unit 320 can apply or block electricity supply to the inside and outside of the load switch 1 by contacting or being spaced apart from the movable terminal unit 330.

The fixed terminal portion 320 is coupled through the fixed terminal receiving portions 112 and 122 of the frame portion 10. The fixed terminal portion 320 is surrounded by the fixed terminal accommodating portions 112 and 122 and seals the fixed terminal accommodating portions 112 and 122. That is, the movement of material through the fixed terminal receiving parts 112 and 122 is blocked by the fixed terminal part 320.

The fixed terminal unit 320 does not move in the internal space of the frame unit 10. Accordingly, contact and separation between the fixed terminal portion 320 and the movable terminal portion 330 are achieved by movement of the movable terminal portion 330.

Except for the above-mentioned part of the fixed terminal portion 320, the remaining portion is exposed to the outside of the frame portion 10. The remaining portion may be electrically connected to an external power source or load using a conductor member (not shown).

A plurality of fixed terminal units 320 may be provided. The number of fixed terminal units 320 is the same as the number of fixed terminal receiving units 112 and 122 provided in the frame unit 10.

In the illustrated embodiment, four fixed terminal units 320 are formed as one group, and three groups of fixed terminal units 320 are arranged side by side in the front-back direction. In the above embodiment, the two fixed terminal portions 320 facing each other with the rotating shaft 40 in between are arranged to be point symmetrical with respect to the central axis of the rotating shaft 40.

The two fixed terminal portions 320 facing each other with the rotating shaft 40 in between may be connected to each other to enable electricity to pass through them. The connection is formed by the movable terminal portion 330 contacting the two fixed terminal portions 320, respectively.

In the illustrated embodiment, the fixed terminal unit 320 includes a first fixed terminal unit 321 and a second fixed terminal unit 322.

The first fixed terminal portion 321 is electrically connected to an external power source and load, or is electrically connected to a ground line. The second fixed terminal portion 322 is electrically connected to a ground wire or to an external power source and load.

The movable terminal unit 330 moves and may be in contact with or spaced apart from the first fixed terminal unit 321 or the second fixed terminal unit 322. However, the movable terminal portion 330 cannot contact the first fixed terminal portion 321 and the second fixed terminal portion 322 at the same time, and contacts only one of the first fixed terminal portion 321 and the second fixed terminal portion 322. It can be.

Specifically, the movable terminal unit 330 may be rotated in a direction toward the fixed terminal unit 320 or in a direction away from the fixed terminal unit 320.

When the movable terminal 330 is rotated in a direction away from the fixed terminal 320, the movable terminal 330 and the fixed terminal 320 are separated from each other, and an arc is formed between the movable terminal 330 and the fixed terminal 320. occurs.

In one embodiment, the first fixed terminal portion 321 may be electrically connected to an external power source and load, and the second fixed terminal portion 322 may be electrically connected to a ground line.

In the above embodiment, when the movable terminal portion 330 contacts the first fixed terminal portion 321, electricity may be applied between the external power source and the load. Additionally, when the movable terminal portion 330 is in contact with the second fixed terminal portion 322, the movable terminal portion 330 is electrically connected to the ground wire, and electrical conduction between the external power source and the load is blocked.

When the movable terminal unit 330 is spaced apart from both the first fixed terminal unit 321 and the second fixed terminal unit 322, the current outside the load switch 1 is not transmitted to the inside of the load switch 1.

In the illustrated embodiment, the first fixed terminal portion 321 includes a first fixed contact point 321a and a first fixed contact point 321b.

The first fixed contact point 321a is connected to an external power source or load in a conductive manner.

One part of the first fixed contact point 321a is accommodated in the internal space of the frame part 10, and the remaining part is exposed to the outside of the frame part 10. Specifically, a portion of the first fixed contact band 321a is surrounded by the fixed terminal receiving portions 112 and 122.

A plurality of first fixed contact points 321a may be provided. In the illustrated embodiment, a total of twelve first fixed contact points 321a are provided, six on the upper side and six on the lower side of the frame portion 10.

In one embodiment, the first fixed contact point 321a may have a cylindrical shape that is bent and extended in a direction toward the rotating shaft 40.

A first fixed contact point 321b is formed at one end of the first fixed contact point 321a facing the rotating shaft 40.

The first fixed contact point 321b is disposed adjacent to the first fixed contact base 321a. Additionally, the first fixed contact point 321b is electrically connected to the first fixed contact base 321a.

The first fixed contact point 321b may be in contact with or spaced apart from the movable contact point 332. Accordingly, the load switch 1 may be energized or cut off from an external power source or load.

In one embodiment, the first fixed contact point 321b may be formed integrally with the first fixed contact base 321a.

The second fixed terminal portion 322 is disposed to be spaced apart from the first fixed terminal portion 321.

The second fixed terminal unit 322 is connected to a member that is not connected to the first fixed terminal unit 321 among external power, load, and ground wires in a conductive manner.

That is, when the first fixed terminal portion 321 is electrically connected to an external power source and load, the second fixed terminal portion 322 is electrically connected to the ground line.

In the illustrated embodiment, the second fixed terminal portion 322 includes a second fixed contact point 322a and a second fixed contact point 322b.

The second fixed contact point 322a and the second fixed contact point 322b have functions and structures corresponding to those of the first fixed contact point 321a and the first fixed contact point 321b. Therefore, redundant explanation regarding this will be omitted.

The movable terminal portion 330 is electrically connected to or separated from the fixed terminal portion 320. Through the movable terminal portion 330, a plurality of fixed terminal portions 320 may be electrically connected to each other. As a result, the load switch 1 can be electrically connected to an external power source or load.

The movable terminal unit 330 is accommodated in the internal space of the frame unit 10. The movable terminal unit 330 is rotatably coupled to the internal space of the frame unit 10.

The movable terminal portion 330 is coupled to the rotating shaft 40. When the rotary shaft 40 rotates, the movable terminal portion 330 may also rotate together with the rotary shaft 40.

In addition, a portion of the movable terminal portion 330 is accommodated in the puffer guides 60 and 70.

A plurality of movable terminal units 330 may be provided. In the illustrated embodiment, the load switch 1 is provided with three pairs of movable terminal units 330. The three pairs of movable terminal units 330 are arranged side by side in the front-to-back direction.

The plurality of movable terminal parts 330 may be in contact with or spaced apart from the plurality of fixed terminal parts 320 so as to conduct electricity. That is, the movable terminal portion 330 may be rotated to contact the fixed terminal portion 320, or rotated to be spaced apart from the fixed terminal portion 320. The contact and separation can be achieved by rotating the rotary shaft 40 connected to the movable terminal portion 330.

When the movable terminal unit 330 contacts the fixed terminal unit 320 connected to an external power source and a load, electricity may be applied between the external power source and the load.

Additionally, when the movable terminal portion 330 contacts the fixed terminal portion 320 connected to the ground wire, the movable terminal portion 330 is connected to the ground wire in a conductive manner, and conduction of electricity between the external power source and the load is blocked.

The movable terminal portion 330 may be formed of a conductive material. For example, the movable terminal portion 330 may be formed of copper, silver, or the like.

In the illustrated embodiment, the movable terminal unit 330 includes a movable contact base 331 and a movable contact point 332.

The movable contact point 331 is directly coupled to the rotating shaft 40 and rotates together with the rotating shaft 40. The movable contact point 331 may be rotated clockwise or counterclockwise by the rotation shaft 40.

In one embodiment, the movable contact base 331 is arranged so that its center point is equal to the center point of the rotating shaft 40.

The movable contact point 331 is formed in a rod shape extending in a predetermined direction. The predetermined direction may be the radial direction of the rotating shaft 40. In one embodiment, the movable terminal portion 330 is bent and extended toward the fixed terminal portion 320.

In the illustrated embodiment, both ends of the movable contact base 331 in the radial direction of the rotating shaft 40 are separated into two parts. A movable contact point 332 is formed at each end.

The movable contact point 332 is electrically connected to the movable contact base 331.

The movable contact point 332 is in contact with or spaced apart from the fixed contact points 321b and 322b. Accordingly, the load switch 1 may be energized or cut off from an external power source or load.

The movable contact point 332 is located at both ends of the movable contact base 331. That is, the movable contact point 332 is located radially outward with respect to the rotating shaft 40.

In one embodiment, the movable contact 332 is arranged to be surrounded by puffer guides 60 and 70. In another embodiment, the movable contact 332 is disposed radially outward from the puffer guides 60 and 70 with respect to the rotating shaft 40. That is, in the above embodiment, the movable contact point 332 is not surrounded by the puffer guides 60 and 70, but is exposed to the outside of the puffer guides 60 and 70.

A plurality of movable contact points 332 may be provided. In the illustrated embodiment, two movable contact points 332 are located at both ends of the movable contact base 331, respectively. That is, the movable contact point 331 is provided with a total of four movable contact points 332.

The movable contact point 332 rotates together with the rotating shaft 40 when the rotating shaft 40 rotates. The movable contact point 332 is accommodated in the internal space of the frame portion 10 so as to be rotatable about the rotation axis of the rotation shaft 40.

In one embodiment, the movable contact point 332 may be formed integrally with the movable contact base 331.

(4) Description of the rotating shaft 40

Hereinafter, the rotating shaft 40 will be described with reference to FIGS. 2 and 3.

The rotation shaft 40 is connected to the movable terminal portion 330 and rotates together with the movable terminal portion 330. By rotation of the rotary shaft 40, the movable terminal portion 330 may contact or be spaced apart from the fixed terminal portion 320 so as to conduct electricity.

The rotation shaft 40 is rotatably coupled to the frame portion 10. Specifically, the rotation shaft 40 is rotatably accommodated in the internal space of the frame portion 10.

The rotating shaft 40 is connected to the movable terminal portion 330. In the illustrated embodiment, the plurality of movable terminal units 330 are coupled to the rotating shaft 40 through penetration.

Additionally, the rotating shaft 40 is electrically connected to the movable terminal portion 330. Accordingly, the current flowing into the load switch 1 through the fixed terminal 320 may proceed toward another fixed terminal 320 through the movable terminal 330 and the rotating shaft 40.

Puffer guides 60 and 70 are coupled to one side of the rotating shaft 40. In one embodiment, the inner space of the puffer guides 60 and 70 and the inner space of the rotating shaft 40 are in communication.

Additionally, the rotating shaft 40 may be connected to a handle (not shown) or an operating unit (not shown). The rotation of the rotary shaft 40 may be manipulated manually by a handle or automatically by a manipulation unit.

In the illustrated embodiment, the rotating shaft 40 rotates clockwise or counterclockwise about its central axis.

The rotation shaft 40 rotates and rotates the movable terminal portion 330. That is, the movable terminal unit 330 may be rotated by the rotation shaft 40 in a direction toward the fixed terminal unit 320 or in a direction away from the fixed terminal unit 320.

The rotating shaft 40 is formed in a cylindrical shape. In one embodiment, the center point of the rotating shaft 40 is positioned to be the same as the center point of the movable terminal portion 330.

A plurality of rotating shafts 40 may be provided. The number of rotating shafts 40 is the same as the number of movable terminal units 330. In the illustrated embodiment, three rotating shafts 40 are arranged side by side along the front-to-back direction.

The number of rotating shafts 40 may be determined depending on the type of power system in which the load switch 1 of the present invention is provided. When the load switch 1 is provided in a power system using a three-phase circuit of R-phase, S-phase, and T-phase, three rotating shafts 40 may also be provided in accordance with the three-phase circuit.

In the illustrated embodiment, the rotating shaft 40 includes a pillar portion 410 and an uneven portion 420.

The pillar portion 410 forms the exterior of the rotating shaft 40.

The movable terminal portion 330 is coupled through the pillar portion 410 and rotates together with the movable terminal portion 330.

The pillar portion 410 is disposed between two opposing puffer guides 60 and 70 and is coupled to the two puffer guides 60 and 70, respectively.

The pillar portion 410 is formed in a cylindrical shape. In the illustrated embodiment, a hollow is formed in the center of the pillar portion 410.

Concave-convex portions 420 are formed at both ends of the pillar portion 410.

The uneven portion 420 couples the two neighboring rotating shafts 40 more firmly.

The uneven portion 420 of one of the two neighboring rotating shafts 40 is disposed adjacent to the uneven portion 420 of the other rotating shaft 40.

The uneven portions 420 of the two rotating shafts 40 are formed in shapes corresponding to each other. Accordingly, the concavo-convex portions 420 of the two rotating shafts 40 may be engaged and coupled to each other. Accordingly, when one rotating shaft 40 is rotated, the remaining rotating shafts 40 may also be rotated together.

2. Description of the arc chute 50 and puffer guide 60 according to an embodiment of the present invention

Hereinafter, the arc chute 50 and the puffer guide 60 according to an embodiment of the present invention will be described with reference to FIGS. 3 to 28.

The arc chute 50 extends the length of the arc generated when switching and blocking the current, thereby cooling and extinguishing the arc.

The arc chute 50 is disposed adjacent to the outer periphery of the frame portion 10. Specifically, the arc chute 50 is in close contact with the outer periphery of the frame portion 10.

The arc chute 50 is coupled to the frame portion 10. At this time, the arc chute 50 is coupled to the fastening wing portion (not shown) of the frame portion 10. Specifically, the fastening wing portion is inserted into the fastening groove 511 of the arc chute 50.

Additionally, a portion of the arc chute 50 is inserted and coupled to the inner space of the frame portion 10 and the arc chamber 310.

The arc chute 50 is formed in a curved shape. Therefore, it can be easily installed in the rotary load switch (1).

Additionally, the arc chute 50 is formed to extend along the circumferential direction of the frame portion 10.

In one embodiment, the arc chute 50 may be formed in a shape corresponding to the outer circumference of the frame portion 10. In another embodiment, the radius of curvature of the arc chute 50 may be the same as the radius of curvature of the frame portion 10. Accordingly, the arc chute 50 can be in close contact with the outer peripheral surface of the frame portion 10.

A plurality of arc chutes 50 may be provided. In the illustrated embodiment, the two arc chutes 50 are formed as a pair. This is to respond to the arc generated when the movable terminal portion 330 in contact with the two fixed contact points 321b and 322b is simultaneously separated from the two fixed contact points 321b and 322b.

In the above embodiment, the two arc chutes 50 facing each other with the rotation shaft 40 in between are arranged to be point symmetrical with respect to the central axis of the rotation shaft 40. Accordingly, the arc extinguishing ability of the arc chute 50 can be maximized.

The arc chute 50 is not limited to the shape shown and may be formed in various ways. In one embodiment, there may be three pairs of arc chutes 50. In the above embodiment, the three pairs of arc chutes 50 may be arranged side by side along the front-to-back direction.

It will be understood that the direction of the coordinate system used when describing the arc chute 50 may change depending on the installation location of the arc chute 50.

In the illustrated embodiment, the arc chute 50 includes a fastening portion 510, a coupling member 520, a cover portion 530, an arc runner 540, and an arc grid 550. do.

The fastening part 510 is a member through which the arc chute 50 is directly coupled to the frame part 10.

The fastening portion 510 is disposed adjacent to the outer periphery of the frame portion 10. In addition, the fastening part 510 is coupled to the fastening wing part (not shown) of the frame part 10.

The fastening part 510 overlaps the fastening wing part in a predetermined direction. At this time, the predetermined direction is the axial direction of the frame unit 10.

The fastening part 510 is disposed between a plurality of cover parts. In the illustrated embodiment, the fastening part is disposed between two cover parts 530 and is coupled to each cover part 530. In the above embodiment, the fastening part 510 is arranged so that its front and rear sides are covered by the cover part 530.

A plurality of fastening units 510 may be provided. The number of fastening parts 510 is the same as the number of fastening wings of the frame part 10. In the illustrated embodiment, the arc chute 50 is provided with two fastening portions 510. In the above embodiment, an arc runner 540 and an arc grid 550 are disposed between the two fastening parts 510.

In one embodiment, the fastening part 510 may be provided with a fastening hole 512 that communicates with the through hole of the cover part 530. The fastening hole 512 is formed through the frame portion 10 in the axial direction.

In the illustrated embodiment, a fastening groove 511 is recessed in the fastening portion 510.

The fastening groove 511 is recessed radially outward from the frame portion 10 from one surface in contact with the outer peripheral surface of the frame portion 10. Additionally, the fastening groove 511 extends in the radial direction of the frame portion 10.

In one embodiment, the fastening groove 511 is formed in a shape corresponding to the fastening wing portion. This assists a more secure connection between the fastening groove 511 and the fastening wing portion.

The fastening groove 511 is coupled to the fastening wing portion of the frame portion 10. Specifically, the fastening wing portion is inserted into the fastening groove 511 and coupled thereto. For this purpose, it is preferable that the thickness of the fastening groove 511 is formed to be larger than the thickness of the fastening wing portion.

The fastening hole 512 is formed to penetrate the fastening part 510 in a predetermined direction. Additionally, the fastening hole 512 is formed to penetrate the fastening groove 511. In one embodiment, the predetermined direction is the axial direction of the frame portion 10.

The coupling member 520 penetrates the fastening part 510 and the fastening wings of the frame unit 10, and further strengthens the coupling of the fastening part 510 and the fastening wings.

The coupling member 520 is not limited to the shape shown and may be formed in various shapes. In one embodiment, the coupling member 520 may be coupled to the arc chute 50 and the frame portion 10 through a bolt coupling method.

Additionally, the coupling member 520 may be formed of a high-rigidity material. For example, the coupling member 520 may be formed of a metal material.

The cover part 530 may be tightly coupled to the fastening part 510, the arc runner 540, and the arc grid 550 by the coupling member 520.

The cover portion 530 forms the exterior of the arc chute 50. The cover part 530 supports the fastening part 510, the arc runner 540, and the arc grid 550 in both directions. In the illustrated embodiment, the cover part 530 supports the fastening part 510, the arc runner 540, and the arc grid 550 in the front-to-back direction.

The cover part 530 is disposed adjacent to the frame part 10. Specifically, the cover portion 530 is disposed on the outer periphery of the frame portion 10 and adjacent to the fixed terminal receiving portions 112 and 122.

A plurality of cover parts 530 may be provided. In the illustrated embodiment, the arc chute 50 is provided with two cover portions 530. In the above embodiment, the two cover parts 530 overlap in the axial direction of the frame part 10.

A fastening part 510, an arc runner 540, and an arc grid 550 are disposed between the two facing cover parts 530. At this time, the runner coupling protrusion 542 of the arc runner 540 and the grid coupling protrusion 552 of the arc grid 550 are inserted into the cover part 530.

The cover portion 530 is formed to extend in the circumferential direction of the frame portion 10.

The cover portion 530 may be formed in a plate shape including a plurality of curves. In one embodiment, the cover portion 530 may be formed in a plate shape extending in the circumferential and radial directions of the frame portion 10.

In the illustrated embodiment, the cover portion 530 is formed in a plate shape extending radially outward from a predetermined arc. Accordingly, the cover part 530 can be tightly coupled to the rotary load switch 1. That is, the cover part 530 can be easily installed on the rotary load switch (1).

In one embodiment, one side of the cover part 530 in contact with the outer circumference of the frame part 10 may be formed in a shape corresponding to the outer circumference of the frame part 10. Preferably, one side of the cover part 530 that is in contact with the outer periphery of the frame part 10 has a radius of curvature equal to that of the frame part 10. At this time, the center of curvature of the cover part 530 is formed to be the same as the center point of the frame part 10.

Accordingly, one side of the cover part 530 can be more firmly adhered to the outer periphery of the frame part 10.

One side and the other side of the cover portion 530 are disposed adjacent to the fixed terminal portion 320. In the illustrated embodiment, the right side of the cover part 530 is disposed adjacent to the fixed terminal part 320.

In the illustrated embodiment, a cover coupling hole 531 and a cover through hole 532 are formed in the cover portion 530.

The cover coupling hole 531 is disposed adjacent to the fastening part 510. In one embodiment, the cover coupling hole 531 may communicate with the fastening hole 512 of the fastening part 510. Additionally, the cover coupling hole 531 is spaced apart from the arc runner 540 and the arc grid 550.

A coupling member 520 is coupled through the cover coupling hole 531.

A plurality of cover coupling holes 531 may be provided. In one embodiment, the number of cover coupling holes 531 may be the same as the number of coupling members 520.

The cover through hole 532 is formed at a location spaced apart from the cover coupling hole 531.

The arc runner 540 and the arc grid 550 are inserted into the cover through hole 532. Specifically, the runner coupling protrusion 542 of the arc runner 540 and the grid coupling protrusion 552 of the arc grid 550 are inserted into the cover through hole 532.

A plurality of cover through-holes 532 may be provided. The number of cover through-holes 532 is equal to the total number of runner coupling protrusions 542 and the number of grid coupling protrusions 552 provided in the arc chute 50.

A plurality of cover through-holes 532 are arranged at regular intervals along a predetermined curve. In one embodiment, the predetermined curve may have a radius of curvature equal to the radius of curvature of the frame unit 10.

The cover through-hole 532 is formed in a shape corresponding to the runner coupling protrusion 542 and the grid coupling protrusion 552. In the illustrated embodiment, the cover through-hole 532 is formed with a rectangular cross-section extending in the front-back direction.

An arc runner 540 and an arc grid 550 are inserted between the two facing cover parts 530.

The arc runner 540 can maximize the arc induction effect of the arc chute 50.

The arc runner 540 is disposed between the fastening portion 510 and the arc grid 550.

The arc runner 540 is disposed between the arc grid 550 and the fixed terminal portion 320. Additionally, the arc runner 540 is disposed closer to the fixed terminal portion 320 when compared to the arc grid 550. In the illustrated embodiment, the arc runner 540 is positioned more to the right with respect to the arc grid 550.

A portion of the arc runner 540 is in contact with the fixed terminal portion 320. Accordingly, when an arc occurs, the arc may be guided toward the arc runner 540. As a result, the arc induction effect can be maximized.

Another part of the arc runner 540 is inserted into and fixed to the cover portion 530.

In one embodiment, the arc runner 540 may be formed of a conductive material. For example, the arc runner 540 may be made of a metal material.

In the illustrated embodiment, the arc runner 540 may be divided into a runner base portion 541, a runner coupling protrusion 542, and a runner leg 543.

The runner base portion 541 forms the body portion of the arc runner 540.

The runner base portion 541 is disposed closer to the fixed terminal portion 320 when compared to the grid base portion 551 of the arc grid 550. In the illustrated embodiment, the runner base portion 541 is disposed to the right with respect to the grid base portion 551.

The runner base portion 541 is formed in a plate shape. In one embodiment, the runner base portion 541 extends in the width direction. That is, the width of the runner base portion 541 is formed to be longer than the length. In the illustrated embodiment, the width direction is the front-to-back direction, and the longitudinal direction is the up-down direction.

A coupling protrusion is formed on one side of the runner base portion 541 facing the cover portion 530. In the illustrated embodiment, engaging protrusions are formed on the front and rear sides of the runner base portion 541.

The runner coupling protrusion 542 secures the arc runner 540 to the cover portion 530.

The runner coupling protrusion 542 is inserted into the cover through hole 532 of the cover portion 530.

The runner coupling protrusion 542 extends from one side of the runner base portion 541 facing the cover portion 530 toward the cover portion 530 . In the illustrated embodiment, the runner engaging protrusion 542 extends from the front side or rear side of the runner base portion 541 toward the front side or rear side.

In one embodiment, the runner coupling protrusion 542 may be formed integrally with the runner base portion 541.

Runner legs 543 form an arc guidance path.

The runner leg 543 is disposed adjacent to the fixed terminal portion 320.

The runner leg 543 extends from the other side of the runner base portion 541 toward the rotating shaft 40. Additionally, the runner legs 543 extend in the longitudinal direction. In the illustrated embodiment, the runner legs 543 extend downward from the lower side of the runner base portion 541.

The runner leg 543 extends in a direction toward the fixed terminal portion 320. Additionally, the runner leg 543 is bent and extended at a predetermined angle. The bending direction is opposite to the fixed terminal portion 320. In the illustrated embodiment, the bending direction is left.

In one embodiment, the runner leg 543 may be formed integrally with the runner base portion 541 and the runner coupling protrusion 542.

A terminal contact portion 543a is formed at one end of the runner leg 543.

The terminal contact portion 543a is formed at one end of the runner leg 543 opposite to the runner base portion 541, based on the bend line of the runner leg 543. That is, the terminal contact portion 543a is located radially inside the frame portion 10 based on the bend line of the runner leg 543.

In the illustrated embodiment, the terminal contact portion 543a is formed at the lower end of the runner leg 543. In the above embodiment, the terminal contact portion 543a is formed below the bend line of the runner leg 543.

The terminal contact portion 543a directly contacts the fixed terminal portion 320. In one embodiment, the terminal contact portion 543a is in contact with the fixed contact points 321b and 322b of the fixed terminal portion 320.

An arc grid 550 is disposed on one side of the arc runner 540 opposite to the fixed terminal portion 320.

The arc grid 550 forms an induction path for the arc generated when switching and blocking the current.

The arc grid 550 is disposed between two opposing cover parts 530. A portion of the arc grid 550 is inserted and fixed into the cover through hole 532 of the cover portion 530. That is, the arc grid 550 is disposed adjacent to the cover portion 530.

Additionally, the arc grid 550 is arranged to be spaced apart from the fixed terminal portion 320.

The arc grid 550 extends in the radial direction of the frame portion 10. Accordingly, the arc grid 550 may be adjacent to the movable terminal unit 330 that is rotated about the central axis of the frame unit 10.

A plurality of arc grids 550 may be provided. As the number of arc grids 550 increases, the expansion and cooling effects of the arc can be further increased.

A plurality of arc grids 550 may be arranged at regular intervals along a predetermined curve. Accordingly, the effect of inducing and extending the arc can be increased.

In one embodiment, the predetermined curve may have a radius of curvature equal to the radius of curvature of the frame unit 10. In another embodiment, the predetermined curve may be formed in a shape corresponding to the outer circumference of the frame portion 10. In the above embodiment, the arc grid 550 is arranged to correspond to one side of the cover part 530 that contacts the frame part 10.

In the illustrated embodiment, the plurality of arc grids 550 are arranged with a constant radius of curvature with respect to the center point C. The center point C is located at the central axis of the frame portion 10 and the rotating shaft 40.

In the illustrated embodiment, the length of the plurality of arc grids 550 gradually decreases in a direction away from the fixed terminal portion 320. Accordingly, the insulation distance for the same number of arc grids 550 can be further increased. Furthermore, recurrence of arcs due to excessive recovery voltage can be prevented.

A plurality of arc grids 550 are arranged at predetermined intervals. In one embodiment, the predetermined interval may be 1.4 times or more and 1.6 times or less the thickness of the arc grid 550. Preferably, the predetermined spacing is 1.5 times the thickness of the arc grid 550.

The arc grid 550 is formed in a plate shape. In the illustrated embodiment, the arc grid 550 is formed to be symmetrical in the front-to-back and left-right directions.

In the embodiment shown in FIGS. 6 to 14, the arc chute 50 is provided with a plurality of arc grids 550 of the same shape.

In the embodiment shown in FIG. 15, the arc chute 50 is provided with arc grids 550 of two different shapes. In the above embodiment, the two different shaped arc grids 550 are alternately arranged along the predetermined curve.

In one embodiment, arc grid 550 may be formed of a conductive material. For example, the arc grid 550 may be formed of a metal material.

In the illustrated embodiment, the arc grid 550 may be divided into a grid base portion 551, a grid coupling protrusion 552, and a grid leg 553.

The grid base portion 551 forms the body portion of the arc grid 550.

The grid base portion 551 is disposed on one side of the arc runner 540 opposite to the fixed terminal portion 320. In the illustrated embodiment, the grid base portion 551 is disposed to the left with respect to the runner base portion 541 of the arc runner 540.

The grid base portion 551 is formed in a plate shape. In one embodiment, the grid base portion 551 extends in the width direction. That is, the width of the grid base portion 551 is formed to be longer than the length. In the illustrated embodiment, the width direction is the front-to-back direction, and the longitudinal direction is the up-down direction.

An arc hole 551a may be formed through the grid base portion 551.

The arc hole 551a forms a bypass path for the arc. Accordingly, the arc can be stretched and cooled more efficiently.

There may be a plurality of arc holes 551a. In the illustrated embodiment, the arc grid 550 is provided with five arc holes 551a.

A grid coupling protrusion 552 is formed on one side of the grid base portion 551 facing the cover portion 530. In the illustrated embodiment, coupling protrusions are formed on the front and rear sides of the grid base portion 551.

The grid coupling protrusion 552 secures the arc grid 550 to the cover portion 530.

The grid coupling protrusion 552 is inserted into the cover through hole 532 of the cover portion 530.

The grid coupling protrusion 552 extends from one side of the grid base portion 551 facing the cover portion 530 toward the cover portion 530 . In the illustrated embodiment, the grid engaging protrusion 552 extends from the front side or rear side of the grid base portion 551 toward the front side or rear side.

In one embodiment, the grid coupling protrusion 552 may be formed integrally with the grid base portion 551.

Grid legs 553 form an arc guidance path.

The grid leg 553 extends from the other side of the grid base portion 551 toward the rotating shaft 40. Additionally, the grid legs 553 extend in the longitudinal direction. In the illustrated embodiment, the grid legs 553 extend downward from the lower side of the grid base portion 551.

The grid leg 553 may be formed in various shapes depending on the shape of the movable terminal portion 330, the puffer guide 60, etc., and the driving conditions of the load switch 1.

The distance between neighboring grid legs 553, the length and shape of the grid legs 553, etc. of the grid legs 553 may be changed in accordance with the driving conditions of the load switch 1. In one embodiment, the grid leg 553 may be formed by cutting according to the driving conditions of the load switch 1.

The arc grid 550 is provided with two grid legs 553. In the embodiment shown in FIG. 14, the grid legs 553 are formed to be symmetrical with respect to the front-back and left-right directions of the arc grid 550.

In an embodiment not shown, the center lines of the two grid legs 553 provided in the arc grid 550 are spaced apart from the center line of the arc grid 550. That is, the grid legs 553 are disposed to be biased in a specific direction with respect to the arc grid 550. In the above embodiment, the specific direction is either the front side or the rear side.

The grid legs 553 provided in the plurality of arc grids 550 are arranged so that the grid legs 553 provided in two neighboring arc grids 550 do not overlap each other in the circumferential direction of the frame portion 10. .

Additionally, in the above embodiment, the grid legs 553 provided in two neighboring arc grids 550 are arranged so as not to overlap each other in the left and right directions.

The grid legs 553 provided in the plurality of arc grids 550 have one end facing the rotation shaft 40 arranged along a predetermined curve. In one embodiment, the predetermined curve may have a radius of curvature equal to the radius of curvature of the frame unit 10. In another embodiment, the predetermined curve is formed in a shape corresponding to the outer circumference of the frame portion 10.

In the illustrated embodiment, the predetermined curve is bent in a specific direction. The specific direction is the radially outward direction of the rotating shaft 40. Accordingly, under the condition of the same number of arc grids 550, the insulation distance between the movable contact point 332 and the arc grid 550 can be secured more reliably. Furthermore, re-ignition of the arc can be prevented.

The one end of the grid leg 553 is arranged at predetermined intervals.

In one embodiment, the grid leg 553 may be formed integrally with the grid base portion 551 and the grid coupling protrusion 552.

A grid concave portion 553a is formed between the two grid legs 553 provided in the arc grid 550. That is, the grid concave portion 553a refers to the space between the two grid legs 553.

The grid recess 553a forms a direct guidance path for the arc.

The arc generated between the fixed terminal portion 320 and the movable terminal portion 330 is guided to the grid concave portion 553a and is extinguished.

The grid concave portion 553a may be formed in various shapes. The shape of the grid concave portion 553a is determined depending on the position and shape of the grid legs 553.

In the embodiment shown in FIG. 14, the grid concave portion 553a is formed to be symmetrical with respect to the front-back and left-right directions of the arc grid 550.

In one embodiment, the grid concave portion 553a is formed by having a triangular cross section with chamfered edges extending in the thickness direction of the arc grid 550.

In another embodiment, the grid concave portion 553a is formed by extending a triangular cross section with an expanded width on one side opposite to the grid base portion 551 in the thickness direction of the arc grid 550.

In another embodiment, the grid concave portion 553a is formed by having a pentagonal cross-section with chamfered edges extending in the thickness direction of the arc grid 550.

In another embodiment, the grid concave portion 553a is formed by having a rectangular cross section with chamfered edges extending in the thickness direction of the arc grid 550.

In another embodiment, the center line of the grid recess 553a (see dotted line) is spaced apart from the center line of the arc grid 550 (see dash-dotted line). That is, the grid concave portion 553a is disposed to be biased in a specific direction with respect to the arc grid 550. In the above embodiment, the specific direction is either the front side or the rear side.

In the above embodiment, the grid recesses 553a provided in the plurality of arc grids 550 are arranged so that the grid recesses 553a provided in the two neighboring arc grids 550 do not overlap each other in the left and right directions. do.

The puffer guide 60 may be rotated in a direction toward the arc chute 50 or in a direction away from the arc chute 50 .

The puffer guide 60 narrows the passage of gas whose pressure increases as the movable terminal unit 330 rotates, thereby dispersing and extinguishing the arc.

The puffer guide 60 is accommodated in the internal space of the frame portion 10.

The puffer guide 60 is coupled to one side of the rotating shaft 40. The puffer guide 60 extends radially outward from the one side of the rotating shaft 40. In one embodiment, the puffer guide 60 may be coupled to the rotating shaft 40 by welding.

A plurality of puffer guides 60 may be provided. In one embodiment, two puffer guides 60 may be provided. The two puffer guides 60 are arranged to face each other with the rotating shaft 40 sandwiched between them. That is, the two puffer guides 60 are arranged to be point symmetrical with respect to the rotating shaft 40.

The puffer guide 60 is formed to surround the movable terminal portion 330. In this embodiment, one side of the puffer guide 60 facing radially outwardly of the rotating shaft 40 is open. Accordingly, the arc generated when the movable terminal portion 330 rotates may be guided to the arc chute 50.

The puffer guide 60 coupled to the rotary shaft 40 rotates together with the rotary shaft 40 when the rotary shaft 40 rotates. That is, the puffer guide 60 can be rotated clockwise or counterclockwise with respect to the rotating shaft 40. At this time, the puffer guide 60 does not collide with the arc grid 550.

During the rotation process, the gas inside the arc chamber 310 is compressed and its pressure increases. The gas passes through the puffer guide 60 and flows in a direction opposite to the rotation. In the flow process, the gas passes through the puffer guide 60 at high speed, and an arc extinguishing operation can be performed.

In the illustrated embodiment, the puffer guide 60 includes a housing portion 610, an insertion portion 620, and a barrier portion 630.

The housing portion 610 forms the exterior of the puffer guide 60.

The housing portion 610 supports the movable terminal portion 330 in the front-back and left-right directions.

The housing portion 610 is disposed adjacent to the rotating shaft 40. Additionally, the housing portion 610 is directly coupled to the rotating shaft 40. In one embodiment, the housing portion 610 may be coupled to the rotating shaft 40 by welding.

The housing portion 610 is formed in a pillar shape with a hollow interior. Both sides of the housing portion 610 facing the radial direction of the rotating shaft 40 are open.

In the illustrated embodiment, the housing portion 610 may be divided into a housing front portion 611, a housing rear portion 612, and a housing side portion 613 based on the rotation direction.

The housing front portion 611, the housing rear portion 612, and the housing side portion 613 form the front, rear, and left and right exterior surfaces of the housing portion 600, respectively.

The housing front portion 611, the housing rear portion 612, and the housing side portion 613 are formed to extend radially outward from the rotating shaft 40.

The housing front portion 611 and the housing rear portion 612 support the movable terminal portion 330 in the front and rear directions, respectively.

Both side ends of the housing front portion 611 and the housing rear portion 612 are connected to the housing side portion 613.

The housing side portion 613 supports the movable terminal portion 330 in the left and right directions.

In the illustrated embodiment, the housing side portion 613 is formed to protrude radially outwardly from the housing front portion 611 and the housing rear portion 612 of the rotating shaft 40. That is, the housing side portion 613 is disposed more radially outward with respect to the rotating shaft 40 when compared to the housing front portion 611 and the housing rear portion 612.

In one embodiment, an insertion wedge 613a may be formed inside the housing side portion 613.

The insertion wedge 613a is a part where the housing portion 610 and the insertion portion 620 are directly coupled to each other.

The insertion wedges 613a are formed on opposite sides of the housing side portions 613 that face each other. Specifically, the insertion wedge 613a is formed to protrude from the opposite side of the housing side portion 613 toward the facing housing side portion 613.

In one embodiment, a locking protrusion (not shown) may be formed on one end of the insertion wedge 613a. This is to prevent arbitrary release of the coupling between the housing portion 610 and the insertion portion 620.

In the illustrated embodiment, the insertion wedge 613a includes a wedge plate formed in a shape corresponding to the opposing surface of the housing side portion 613, and a pillar portion respectively coupled to the wedge plate and the opposing surface of the housing side portion 613.

The insertion portion 620 is slidably coupled to the insertion wedge 613a.

The insertion portion 620 is coupled to one end of the housing portion 610 facing radially outward.

The insertion part 620 is coupled to the housing part 610 in a sliding manner. The insertion part 620 coupled to the housing part 610 is prevented from falling off by a locking protrusion (not shown) formed on the housing part 610.

The insertion part 620 rotates together with the housing part 610 when the rotation shaft 40 and the housing part 610 rotate. During the rotation process, the insertion portion 620 does not collide with the arc grid 550. That is, the insertion portion 620 is arranged to be spaced apart from the arc grid 550.

In addition, the distance between one end of the insertion portion 620 facing radially outward of the rotating shaft 40 and the rotating shaft 40 is the distance between one end of the arc grid 550 facing radially inward of the rotating shaft 40 and the rotating shaft ( 40) It is formed smaller than the distance between them. That is, the insertion portion 620 is disposed more radially inward with respect to the frame portion 10 when compared to the arc grid 550.

The insertion portion 620 is formed in the shape of a pillar with a hollow interior. Both sides of the insertion portion 620 facing the radial direction of the rotating shaft 40 are open.

In the illustrated embodiment, the insertion portion 620 may be divided into an insertion front portion 621, an insertion rear portion 622, and an insertion side portion 623 based on the rotation direction.

The insertion front portion 621, the insertion rear portion 622, and the insertion side portion 623 form the front side, rear side, and left and right side appearances of the insertion portion 620, respectively.

The insertion front portion 621, the insertion rear portion 622, and the insertion side portion 623 support the movable terminal portion 330 in the front side, rear side, and left and right directions, respectively.

The insertion front portion 621 and the insertion rear portion 622 are formed in a plate shape.

Both side ends of the insertion front portion 621 and the insertion rear portion 622 are connected to the insertion side portion 623.

Additionally, the insertion front portion 621 is coupled to the housing front portion 611.

In the illustrated embodiment, the insertion front portion 621 includes a front insertion assistant portion 621a and a front recessed portion 621b.

The front insertion assistant portion 621a prevents the insertion portion 620 from being separated from the housing portion 610.

The front insertion assistant portion 621a is formed to extend downward from the bottom of the insertion front portion 621. Specifically, the front insertion assistant portion 621a is formed to protrude forward from the insertion front portion 621.

The front insertion auxiliary portion 621a is formed as a plate. In the illustrated embodiment, the width of the front insertion auxiliary portion 621a in the left and right directions is smaller than the width of the insertion front portion 621 in the left and right directions.

The front insertion assistant portion 621a contacts the housing front portion 611 and supports the housing portion 610 from the front side. Accordingly, arbitrary movement and separation of the housing portion 610 can be prevented.

In one embodiment, the front insertion assistant 621a may be formed in a shape corresponding to the contact surface of the housing front 611.

The front recessed portion 621b serves to disperse and extinguish the arc by narrowing the flow path for the pressure generated when the rotary shaft 40 rotates.

It is formed by being depressed in a direction toward the rotation shaft 40 from one side facing radially outward of the rotation shaft 40. In the illustrated embodiment, the front recessed portion 621b is formed by recessing downward from the top of the insertion front portion 621.

The front recessed portion 621b is formed by extending a predetermined cross section in the thickness direction of the insertion portion 620. In one embodiment, the predetermined cross-section is trapezoidal.

In one embodiment, the edges of the front recessed portion 621b may be chamfered.

When the rotation shaft 40 rotates, a portion of the grid leg 553 may pass through the space formed in the front depression 621b.

The insertion front part 621 is arranged to face the insertion rear part 622.

The insert rear portion 622 is coupled to the housing rear portion 612.

The gas inside the frame portion 10 is compressed when the rotary shaft 40 rotates and flows through the insertion rear portion 622 with increased pressure.

In the illustrated embodiment, the insertion rear portion 622 includes a rear insertion auxiliary portion 622a, a rear depression 622b, a rear groove 622c, and a rear through-hole 622d.

The rear insertion assistant portion 622a prevents the insertion portion 620 from being separated from the housing portion 610.

The rear insertion assistant portion 622a is formed to extend downward from the bottom of the insertion rear portion 622. Specifically, the rear insertion assistant portion 622a is formed to protrude rearward from the insertion rear portion 622.

The rear insertion assistant 622a is formed in a plate shape. In the illustrated embodiment, the width of the rear insertion auxiliary portion 622a in the left and right directions is smaller than the width of the insertion rear portion 622 in the left and right directions.

The rear insertion assistant portion 622a contacts the housing rear portion 612 and supports the housing portion 610 from the rear side. Accordingly, arbitrary movement and separation of the housing portion 610 can be prevented.

In one embodiment, the rear insertion assistant 622a may be formed in a shape corresponding to the contact surface of the housing rear portion 612.

The rear recessed portion 622b narrows the gas flow path inside the frame portion 10 and functions to disperse and extinguish the arc.

The rear depression 622b is formed by being depressed in a direction toward the rotation shaft 40 from one side facing radially outward of the rotation shaft 40. In the illustrated embodiment, the rear recessed portion 622b is formed by recessing downward from the top of the insert rear portion 622.

The rear recessed portion 622b is formed by extending a predetermined cross section in the thickness direction of the insertion portion 620. In one embodiment, the predetermined cross-section is trapezoidal.

In one embodiment, the cross-sectional area of the rear recessed portion 622b may be larger than that of the front recessed portion 621b. In the case of the above embodiment, there is a possibility that the arc may not be sufficiently extinguished by the rear depression 622b. This can be supplemented by the barrier part 630, which will be described later. A detailed description of this will be provided later.

In one embodiment, the rear depression 622b may have its edges chamfered.

Additionally, when the puffer guide 60 rotates, a portion of the runner leg 543 and the grid leg 553 passes through the rear depression 622b.

The rear groove 622c is spaced apart from the rear depression 622b.

The rear groove 622c is formed through the rear side of the insert rear portion 622. In the illustrated embodiment, the rear groove 622c is formed with a rectangular cross-section extending in the thickness direction of the inserted rear portion 622.

However, the rear groove 622c is not limited to the shape shown and may be formed in various shapes. For example, the rear groove 622c may be formed with a circular cross-section extending in the thickness direction of the inserted rear portion 622.

The rear groove 622c is coupled to the side protrusion 632a of the barrier portion 630. Specifically, the side protrusion 632a of the barrier portion 630 is inserted into and coupled to the rear groove 622c. For this purpose, the rear groove 622c is preferably formed in a shape corresponding to the side protrusion 632a of the barrier portion 630.

The rear through hole 622d is spaced apart from the rear depression 622b and the rear groove 622c, respectively.

The rear through hole 622d is formed through the rear side of the insertion rear portion 622. In the illustrated embodiment, the rear through-hole 622d is formed with a circular cross-section extending in the thickness direction of the inserted rear portion 622.

However, the rear through hole 622d is not limited to the shape shown and may be formed in various shapes. For example, the rear through-hole 622d is formed with a polygonal cross-section extending in the thickness direction of the inserted rear portion 622.

The rear through hole 622d is coupled to the barrier coupling portion 631 of the barrier portion 630. In one embodiment, the rear through hole 622d and the barrier coupling portion 631 are coupled by a coupling member (not shown).

The insertion side portion 623 is connected to the left and right sides of the insertion front portion 621 and the insertion rear portion 622, respectively. That is, the insertion side portion 623 is disposed between the insertion front portion 621 and the insertion rear portion 622.

The insertion side portion 623 is formed to extend radially outwardly of the rotating shaft 40.

The insertion side portion 623 is coupled to the housing side portion 613. Specifically, the insertion side portion 623 is inserted and coupled to the inner opposing surface of the housing side portion 613.

In one embodiment, the upper end of the inner surface 623a of the insertion side portion 623 may be cut at a predetermined angle. At this time, the inner surface 623a is preferably cut in consideration of the rotation direction of the puffer guide 60 and the size of the arc chute 50. This is to prevent collision between the insertion side portion 623 and the arc chute 50.

In the illustrated embodiment, the insertion side portion 623 has an insertion groove 623b.

The insertion groove 623b is a portion into which the insertion wedge 613a of the housing portion 610 is inserted and coupled. In one embodiment, the insertion wedge 613a may be slidably inserted and coupled to the insertion groove 623b.

The insertion groove 623b is recessed in the outer surface of the insertion side portion 623. At this time, the insertion groove 623b is preferably formed in a shape corresponding to the insertion wedge 613a. Specifically, the cross-sectional area of the insertion groove 623b is preferably formed to have a shape corresponding to the cross-sectional area of the insertion wedge 613a.

In one embodiment, the cross-sectional area of the insertion groove 623b may be larger than the cross-sectional area of the locking protrusion (not shown) of the insertion wedge 613a.

The barrier portion 630 serves to make the arc flow path flowing into the puffer guide 60 narrower.

The barrier portion 630 is located on the rear side of the puffer guide 60. Specifically, the barrier portion 630 is coupled to the insertion rear portion 622. Additionally, the space formed inside the barrier portion 630 communicates with the rear recessed portion 622b of the insertion portion 620.

The arc generated when the fixed terminal portion 320 and the movable terminal portion 330 are separated collides with the barrier portion 630 and then flows into the inner hollow of the insertion portion 620. Specifically, the generated arc passes through the inner space of the barrier portion 630 and then flows into the inner hollow of the insertion portion 620 through the rear recessed portion 622b.

Accordingly, the flow path for the movement of pressure generated by rotation of the rotary shaft 40 can be formed to be narrower. Accordingly, the distributed extinguishing efficiency of the arc can be further improved.

In the illustrated embodiment, the barrier portion 630 includes a barrier coupling portion 631, a barrier side portion 632, and a barrier inclined portion 633.

The barrier coupling portion 631 is a portion where the barrier portion 630 and the insertion portion 620 are directly coupled.

The barrier coupling portion 631 is disposed adjacent to the insertion rear portion 622.

The barrier coupling portion 631 is coupled to at least one of the barrier side portion 632 and the barrier inclined portion 633. In one embodiment, the barrier coupling portion 631 is coupled to at least one of the barrier side portion 632 and the barrier inclined portion 633 by a bolt coupling method.

In the illustrated embodiment, the barrier coupling portion 631 is coupled to one side of the barrier inclined portion 633. In the above embodiment, the barrier coupling portion 631 is formed in a plate shape that is bent and extended at a right angle. However, the barrier coupling portion 631 is not limited to the shape shown and may be formed in various shapes.

In one embodiment, a barrier through hole 631a is formed through the barrier coupling portion 631.

The barrier through hole 631a is located adjacent to the rear through hole 622d of the insertion part 620, and communicates with the rear through hole 622d.

In the illustrated embodiment, the barrier through-hole 631a is formed with a circular cross-section extending in the thickness direction of the barrier coupling portion 631. However, the barrier through hole 631a is not limited to the shape shown and may be formed in various shapes.

In one embodiment, a member such as a bolt may be coupled through the barrier through hole 631a.

The barrier side portion 632 forms the side exterior of the barrier portion 630.

The barrier side portion 632 is formed in a plate shape extending toward the rear. In the illustrated embodiment, the barrier side portion 632 is formed in a polygonal plate shape. However, the barrier side portion 632 is not limited to the shape shown and may be formed in various shapes.

A plurality of barrier side portions 632 may be provided. In the illustrated embodiment, two barrier side portions 632 are provided. In the above embodiment, a barrier inclined portion 633 is disposed between the two barrier side portions 632.

The barrier side portion 632 is coupled to the left and right sides of the barrier inclined portion and supports the barrier inclined portion 633 in the left and right directions.

In the illustrated embodiment, a side protrusion 632a is formed at the front side end of the barrier side portion 632.

The side protrusion 632a is formed to protrude from the front side end of the barrier side portion 632 toward the insertion portion 620.

The side protrusion 632a is a portion into which the rear groove 622c of the insertion portion 620 is inserted and coupled. For this purpose, the side protrusion 632a is preferably formed in a shape corresponding to the rear groove 622c.

In the illustrated embodiment, the side protrusion 632a is formed with a rectangular cross-section extending in the thickness direction of the barrier side portion 632. However, the side protrusion 632a is not limited to the shape shown and may be formed in various shapes. For example, the side protrusion 632a may be formed with a circular cross-section extending in the thickness direction of the barrier side portion 632.

The barrier slope portion 633 forms the lower and rear exterior surfaces of the barrier portion 630.

In one embodiment, the barrier inclined portion 633 may be formed in a plate shape. Additionally, the barrier inclined portion 633 may be arranged to form a predetermined angle with the insertion rear portion 622. In the illustrated embodiment, the predetermined angle is formed as an acute angle.

In one embodiment, a plurality of barrier inclined portions 633 may be provided. In this embodiment, the different barrier slopes 633 are spaced apart from each other. In the illustrated embodiment, two barrier slopes 633 are provided.

The barrier inclined portion 633 is coupled to the barrier side portion 632. In one embodiment, the barrier slope 633 is disposed between opposing barrier side portions 632.

3. Description of the puffer guide 70 according to another embodiment of the present invention

Referring again to FIGS. 1 to 3, the load switch 1 according to an embodiment of the present invention includes puffer guides 60 and 70.

The puffer guide 70 according to this embodiment corresponds in function and structure to the puffer guide 60 according to the above-described embodiment. However, the puffer guide 70 according to this embodiment is different from the puffer guide 60 according to the above-described embodiment in some components.

Specifically, in the puffer guide 70 according to the present embodiment, the barrier coupling portion 731, the barrier side portion 732, and the barrier bottom portion 733 are formed integrally, and the puffer guide according to the above-described embodiment ( 60) and there is a difference.

In addition, in the puffer guide 70 according to the present embodiment, the insertion portion 720 is partially cut so that the movable terminal portion 330 is exposed to the outside of the puffer guide 70. The puffer guide according to the above-described embodiment ( 60) and there is a difference.

Hereinafter, with reference to FIGS. 29 to 38, the puffer guide 70 according to this embodiment will be described focusing on the differences from the puffer guide 60 according to the above-described embodiment.

The puffer guide 70 according to this embodiment includes a housing portion 710, an insertion portion 720, and a barrier portion 730.

Among the components, the housing portion 710 and the insertion portion 720 have the same structure, function, and coupling structure as the housing portion 610 and the insertion portion 620 according to the above-described embodiment.

The barrier unit 730 has mostly the same structure and function as the barrier unit 630 according to the above-described embodiment. However, the barrier portion 730 according to this embodiment is different in that the barrier coupling portion 731, the barrier side portion 732, and the barrier bottom portion 733 are formed integrally.

The barrier portion 730 according to this embodiment is formed integrally. Specifically, the barrier portion 730 may be divided into a barrier coupling portion 731, a barrier side portion 732, and a barrier bottom portion 733.

Among the above components, the barrier side portion 732 has the same structure, function, and coupling structure as the barrier side portion 632 according to the above-described embodiment.

The barrier coupling portion 731 is disposed adjacent to at least one of the barrier side portion 732 and the barrier bottom portion 733. Specifically, the barrier coupling portion 731 is formed by extending from at least one of the barrier side portion 732 and the barrier bottom portion 733.

In the illustrated embodiment, the barrier coupling portion 731 is formed extending from the barrier side portion 732 and the barrier bottom portion 733. In the above embodiment, the barrier coupling portion 731 is formed in a plate shape extending along the barrier side portion 732 and the barrier bottom portion 733. However, the barrier coupling portion 731 is not limited to the shape shown and may be formed in various shapes.

In one embodiment, a barrier through hole 731a may be formed through the barrier coupling portion 731.

The barrier through hole 731a has the same structure, function, and coupling structure as the barrier through hole 631a according to the above-described embodiment.

The barrier bottom portion 733 forms the lower exterior of the barrier portion 730.

In one embodiment, the barrier bottom portion 733 is formed in a plate shape. Additionally, the barrier bottom portion 733 may be arranged to form a predetermined angle with the insertion rear portion 722. In the illustrated embodiment, the predetermined angle is formed as a right angle.

The barrier bottom portion 733 is connected to the barrier side portion 732. Specifically, both left and right ends of the barrier bottom portion 733 are connected to the bottom of the barrier side portion 732, respectively.

4. Description of the process in which arc extinguishing operation is performed in the load switch (1) according to the embodiment of the present invention

Hereinafter, the arc extinguishing operation of the load switch 1 according to an embodiment of the present invention will be described with reference to FIG. 39. The direction of rotation of each component will be understood with reference to FIG. 39.

Figure 39(a) shows the load switch 1 in a state before arc A occurs, and Figure 39(b) shows the load switch 1 in a state after arc A occurs.

When the movable contact point 332 is rotated in a direction away from the fixed contact points 321b and 322b, the movable contact point 332 and the fixed contact points 321b and 322b are separated from each other and an arc A is generated.

A portion of the generated arc A is primarily guided toward the arc runner 540. A portion of the arc A guided toward the arc runner 540 moves from the arc runner 540 toward the arc grid 550. Specifically, a portion of the arc A is moved toward the grid recess 553a of the arc grid 550.

The remaining part of the generated arc (A) flows into the inner space of the puffer guides (60, 70) and can be extinguished. The specific process is as follows.

The gas inside the arc chamber 310 may be momentarily compressed by the pressure generated by the rotation of the rotating shaft 40. Accordingly, the arc A may flow into the inner space of the puffer guides 60 and 70 together with the gas.

The arc A flowing into the puffer guides 60 and 70 first collides with the barrier portions 630 and 730 and then flows into the insertion rear portions 622 and 722. Accordingly, the pressure transfer path passing through the rear inlet of the puffer guides 60 and 70 can be formed to be narrower. Furthermore, the pressure of the fluid is concentrated, and the dispersion effect of the arc (A) can be maximized.

In the above process, the arc A passes through the puffer guides 60 and 70 at a higher speed, and the arc extinguishing effect is improved.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to the configuration of the above-described embodiments.

In addition, the present invention can be modified and changed in various ways by those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below.

Furthermore, the above embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made.

1: Load switch
10: frame part
110: upper frame
112: Upper fixed terminal receiving portion
120: lower frame
122: Lower fixed terminal receiving portion
20: Fixing part
210: fixed plate
211: fixing hole
220: support
30: opening and closing part
310: arc chamber
320: fixed terminal part
321: First fixed terminal portion
321a: first fixed contact bar
321b: first fixed contact
322: Second fixed terminal portion
322a: second fixed contact bar
322b: second fixed contact
330: Movable terminal portion
331: Movable contact bar
332: moving contact
40: rotating shaft
410: pillar part
420: uneven portion
50: arc chute
510: fastening part
511: fastening groove
512: fastener
520: coupling member
530: Cover part
531: Cover joint hole
532: Cover through hole
540: arc runner
541: Runner base part
542: Runner coupling protrusion
543: Runner legs
543a: terminal contact part
550: arc grid
551: Grid base part
551a: arc hole
552: Grid coupling protrusion
553: grid leg
553a: grid recess
60: Puffer guide according to an embodiment of the present invention
610: Housing part
611: Housing front part
612: Housing rear part
613: Housing side part
613a: Insertion wedge
620: Insertion part
621: Insertion front part
621a: Front insertion assistant
621b: Front depression
622: Insert rear part
622a: Rear insertion auxiliary
622b: Rear depression
622c: Rear groove
622d: Rear through hole
623: Insertion side part
623a: medial side
623b: Insertion groove
630: Barrier part
631: Barrier joint
631a: Barrier penetration hole
632: Barrier side part
632a: side protrusion
633: Barrier slope
70: Puffer guide according to another embodiment of the present invention
710: Housing part
711: Housing front part
712: Housing rear part
713: Housing side part
713a: insert wedge
720: Insertion part
721: Insertion front
721a: Front insertion assistant
721b: Front depression
722: Insert rear part
722a: Rear insertion auxiliary
722c: Rear through hole
723: Insertion side part
723a: medial side
723b: Insertion groove
730: Barrier part
731: Barrier joint
731a: Barrier penetration hole
732: Barrier side part
733: Barrier bottom part

Claims (17)

Fixed terminal section;
Movable terminal section;
a rotating shaft rotatable relative to the fixed terminal portion and capable of rotating together with the movable terminal portion; and
A hollow is formed inside to accommodate the movable terminal portion, and includes a puffer guide that is coupled to the outer peripheral surface of the rotating shaft and can be rotated together with the rotating shaft,
The puffer guide is,
an insertion portion formed in a pillar shape extending in a radial direction of the rotating shaft; and
It includes a barrier portion coupled to one side of the insertion portion,
The barrier part,
a plurality of barrier side portions formed in a plate shape and extending in a direction away from the one surface of the insertion portion; and
A barrier inclined portion is located between the plurality of barrier side portions, is formed in a plate shape, and is coupled to the insertion portion at a predetermined angle,
The puffer guide is,
A housing portion disposed adjacent to the outer peripheral surface of the rotating shaft, formed in a column shape extending radially outward of the rotating shaft, and having an insertion wedge protruding from at least one surface,
An insertion groove is recessed on at least one side of the insertion portion,
The insertion groove is,
It is formed in a shape corresponding to the insertion wedge, and the insertion wedge is coupled by sliding,
Load switch. According to paragraph 1,
A plurality of the barrier inclined portions are provided,
The different barrier slopes are spaced apart from each other,
Load switch. According to paragraph 1,
The movable terminal part,
A movable contact that can be contacted or separated from the fixed terminal portion; and
It is formed in a rod shape extending in a radial direction of the rotating shaft, and includes a movable contact point on one end of which the movable contact point is formed,
The puffer guide is,
The movable contact base is accommodated inside, and the movable contact point is disposed outside,
Load switch. According to paragraph 3,
It includes an arc chute having a plurality of arc grids spaced apart from the fixed terminal portion,
The arc grid is,
A grid base portion formed in a plate shape; and
It includes two grid legs extending radially inside the rotating shaft from one side of the grid base portion,
The grid leg is,
The distance between one end facing radially inward of the rotating shaft and the rotating shaft is formed to be smaller than the distance between the movable contact point and the rotating shaft,
A grid concave portion is formed in the space between the two grid legs,
The grid concave part is,
Its width is formed to be larger than the width of the movable contact, and the movable contact passes through and rotates therein.
Load switch. delete According to paragraph 1,
At least a portion of the outer peripheral surface of the insertion portion,
An insertion auxiliary portion is formed that protrudes in a direction away from the outer peripheral surface and extends toward the rotating shaft.
Load switch. Fixed terminal section;
Movable terminal section;
a rotating shaft rotatable relative to the fixed terminal portion and capable of rotating together with the movable terminal portion; and
A hollow is formed inside to accommodate the movable terminal portion, and includes a puffer guide that is coupled to the outer peripheral surface of the rotating shaft and can be rotated together with the rotating shaft,
The puffer guide is,
an insertion portion formed in a pillar shape extending in a radial direction of the rotating shaft; and
It includes a barrier portion coupled to one side of the insertion portion,
The barrier part,
a plurality of barrier side portions formed in a plate shape and extending in a direction away from the one surface of the insertion portion; and
A barrier inclined portion is located between the plurality of barrier side portions, is formed in a plate shape, and is coupled to the insertion portion at a predetermined angle,
The barrier part,
It includes a barrier coupling portion located adjacent to the one surface of the insertion portion,
In a portion of the insertion portion and the barrier coupling portion,
An insertion hole and a barrier penetration hole are formed, respectively.
The insertion portion through hole and the barrier through hole are,
arranged adjacent to each other and joined by bolting,
Load switch. In clause 7,
The barrier coupling part,
Coupled to one side of the barrier slope,
Load switch. In clause 7,
The barrier coupling part,
Coupled to one side of the barrier side portion,
Load switch. According to paragraph 1,
On at least one side of the insertion portion,
Provided with a recessed portion formed by cutting toward the rotating shaft,
Load switch. According to paragraph 1,
The inner peripheral surface of the insertion portion is,
At least a portion of the top is cut at a predetermined angle,
Load switch. An opening and closing portion including a fixed terminal portion and a movable terminal portion;
a rotating shaft rotatable relative to the fixed terminal portion and capable of rotating together with the movable terminal portion; and
A hollow for accommodating the movable terminal portion is formed therein, and includes a puffer guide that is coupled to the outer peripheral surface of the rotating shaft and can be rotated together with the rotating shaft,
The puffer guide is,
an insertion portion formed in a pillar shape extending in a radial direction of the rotating shaft; and
It includes a barrier portion coupled to one side of the insertion portion,
The barrier part,
a plurality of barrier side portions formed in a plate shape and extending in a direction away from the one surface of the insertion portion; and
It is disposed between the different barrier side parts, connects one end of the different barrier side parts, and includes a barrier bottom part coupled to the insertion part at a predetermined angle,
The puffer guide is,
A housing portion disposed adjacent to the outer peripheral surface of the rotating shaft, formed in a column shape extending radially outward of the rotating shaft, and having an insertion wedge protruding from at least one surface,
An insertion groove is recessed on at least one side of the insertion portion,
The insertion groove is,
It is formed in a shape corresponding to the insertion wedge, and the insertion wedge is coupled by sliding,
Load switch. According to clause 12,
It includes an arc chute having a plurality of arc grids spaced apart from the fixed terminal portion,
The arc grid is,
A grid base portion formed in a plate shape; and
It includes two grid legs extending radially inside the rotating shaft from one side of the grid base portion,
The movable terminal part,
A movable contact that can be contacted or separated from the fixed terminal portion; and
It is formed in a rod shape extending in a radial direction of the rotating shaft, and includes a movable contact point on one end of which the movable contact point is formed,
The puffer guide is,
The movable contact base is accommodated inside, and the movable contact point is disposed outside,
The grid leg is,
The distance between one end facing radially inward of the rotating shaft and the rotating shaft is formed to be smaller than the distance between the movable contact point and the rotating shaft,
A grid concave portion is formed in the space between the two grid legs,
The grid concave part is,
Its width is formed to be larger than the width of the movable contact, and the movable contact passes through and rotates therein.
Load switch. delete According to clause 12,
At least a portion of the outer peripheral surface of the insertion portion,
An insertion auxiliary portion is formed that protrudes in a direction away from the outer peripheral surface and extends toward the rotating shaft.
Load switch. An opening and closing portion including a fixed terminal portion and a movable terminal portion;
a rotating shaft rotatable relative to the fixed terminal portion and capable of rotating together with the movable terminal portion; and
A hollow for accommodating the movable terminal portion is formed therein, and includes a puffer guide that is coupled to the outer peripheral surface of the rotating shaft and can be rotated together with the rotating shaft,
The puffer guide is,
an insertion portion formed in a pillar shape extending in a radial direction of the rotating shaft; and
It includes a barrier portion coupled to one side of the insertion portion,
The barrier part,
a plurality of barrier side portions formed in a plate shape and extending in a direction away from the one surface of the insertion portion; and
It is disposed between the different barrier side parts, connects one end of the different barrier side parts, and includes a barrier bottom part coupled to the insertion part at a predetermined angle,
The barrier part,
A barrier coupling portion located adjacent to the one surface of the insertion portion and extending from one end of at least one of the barrier side portion and the barrier bottom portion,
Load switch. According to clause 16,
In a portion of the insertion portion and the barrier coupling portion,
An insertion hole and a barrier penetration hole are formed, respectively.
The insertion portion through hole and the barrier through hole are,
arranged adjacent to each other and joined by bolting,
Load switch.

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