KR102469510B1 - Vacuum interrupter - Google Patents

Abstract

The present invention relates to a circuit breaker, which is provided to switch between a closed state in which an inlet side and a drawout side are electrically connected to each other or an open state in which they are electrically opened to each other, and includes an operating unit and an operation of the operating unit. An auxiliary switch unit that operates and switches to either the closed state or the open state, and a main switch unit that operates by the operation of the auxiliary switch unit and switches to either the closed state or the open state include

Description

Breaker {VACUUM INTERRUPTER}

The present invention relates to a circuit breaker, and more particularly, to a circuit breaker capable of improving insulation performance due to a double insulation structure and maintaining constant performance even during repeated use.

In general, electricity generated at a voltage of about 20,000V in various power plants is boosted to an extra-high voltage suitable for transmission and transmitted to a primary substation through an extra-high voltage line.

In the primary substation, the supplied power is stepped down and supplied to the secondary substation or each customer in general. That is, the power supplied from the primary substation is supplied to the power receiving facilities of each customer through a distribution system composed of overhead distribution lines and underground distribution lines, and is supplied to low voltage customers through extra-high voltage customers, high-voltage customers, and various outdoor transformers.

At this time, a load break switch (LBS) is widely used to supply and stop power to a wide range of consumers by being installed in a suitable location on the transmission and distribution system such as line division, branching, and transformer primary side of the high-voltage consumer switchboard.

Such a load switchgear can cut off a certain section when power outages are required by the plan of the electric power company or due to an unexpected accident, and also in the event of an electrical accident or failure caused by a load in a customer's facilities and systems, the power supply to a specific area By cutting off the electricity quickly, the damage range is minimized and the fault current is prevented from spreading to other lines.

These load switchgear controls the power supply by driving the connection part to the opening and closing position. In the conventional general load switchgear, insulating gas is injected into the gas tank to insulate arc extinguishing that occurs in the case of opening and closing a high voltage line.

SF6 is mainly used as an insulating gas. Since SF6 is nonflammable, there is little risk of fire, it can be used in any place indoors or outdoors, and it is harmless to the human body.

However, when a gas such as SF6 leaks into the atmosphere outside the gas tank after arc extinguishing, it causes a global greenhouse effect that is much higher than that of carbon dioxide, so there is a problem of adversely affecting the global environment. Its use is being regulated.

Accordingly, as the safety and eco-friendliness of power devices have recently become more important, the global power device market trend has changed from gas-insulated load switches that use SF6 gas to insulate, and polymers that insulate using epoxy and shut off using vacuum valves. (Epoxy) insulated load switchgear is rapidly changing.

Conventional polymer (epoxy) insulated load switchgear uses epoxy for basic insulation and does not use SF6 gas, but a vacuum valve is always used for shutoff.

The vacuum valve has excellent blocking performance and excellent insulation performance at a short distance, but the opening distance (stroke) inside the vacuum valve is too close, so many changes in insulation performance occur depending on the conditions of use, and remain on the secondary line even after opening. voltage may be present.

Due to its characteristics, the inside of the vacuum valve is made of vacuum to maintain insulation at a short distance (159kV: about 12mm), and in order to flow current, it must be pushed with a certain amount of load so that the electrodes come into contact and the electrical strength can be maintained. .

Therefore, even if the switch is opened, many accidents have recently occurred due to abnormal voltage flowing or insulation deterioration during maintenance work at the rear end, and a countermeasure is being prepared.

Accordingly, in a switch that uses a vacuum valve as a shut-off unit, an additional insulating device other than the vacuum valve is necessarily required.

1. Korea Patent Registration No. 10-0718494

An object of the present invention is to provide a circuit breaker capable of preventing an electric shock accident by improving interelectrode insulation by double insulation of a main switch unit and an auxiliary switch unit.

Another object of the present invention is to provide a circuit breaker capable of minimizing the size of a housing by locating a main switch unit and an auxiliary switch unit on a straight line.

In addition, another object of the present invention is to minimize the force required when connecting the rod and the connector and also minimize the force required when separating the rod and the connector, thereby reducing fatigue applied to the rod and the connector when connecting or disconnecting the rod and the connector. It is to provide a circuit breaker capable of minimizing and, as a result, maintaining performance capable of preventing deformation and damage of rods and connectors.

Another object of the present invention is to provide a circuit breaker capable of minimizing noise and maintaining constant performance even during repeated use.

A vacuum circuit breaker according to an embodiment of the present invention for achieving the above object is provided to switch to either a closed state in which the inlet side and the outlet side are electrically connected to each other or an open state in which they are electrically opened to each other. do.

A vacuum circuit breaker according to an embodiment of the present invention includes a control unit, an auxiliary switch unit that is operated by manipulation of the control unit, and converts to any one of the closed state and the open state, and the operation of the auxiliary switch unit. and a main switch unit that is operated by and converts to any one of the closed state and the open state.

The auxiliary switch unit has a rod that is fixed to the control unit and moves in a straight line, and is disposed to face the other side of the rod, and forms a groove into which the tip of the rod is inserted, and at least a part of the connector operates by the rod. , A connecting member disposed movably inside the connector and contacting a portion of the connector with the tip of the rod when the tip of the rod is inserted into the groove.

The connection member may be provided in a ball shape.

An insertion groove recessed inward along the circumference may be formed at the tip of the rod.

At the tip of the rod, a first inclined surface having an inclined shape may be formed at a corner portion.

A plurality of connecting members may be disposed along the inner circumferential surface of the groove.

When the tip of the rod is inserted into the groove, the connector is connected to the rod by the connecting member, covers a moving module moving with the rod, and the moving module, and the rod and the moving module move. When, it may include a fixing module that maintains a fixed state.

The moving module has a first groove portion into which the tip of the rod is inserted on one side, and a seating groove (or seating hole) concave inward to insert the connection member on the outside is spaced apart along the circumference, and the other side It may include a first movable member formed along the circumference of the pressing jaw protruding outward.

An inclined portion having a narrow inner diameter may be formed inside the first movable member from one side to the other side.

A hollow portion is defined by an end portion of the inclined portion, and a connecting means connected to the movable electrode of the main switch unit may be exposed in the hollow portion.

The movable module has a first open hole having a first inner diameter to accommodate at least a part of the first movable member on one side and a second open hole having a second inner diameter smaller than the first inner diameter on the other side. A second movable member may be included.

The second inner diameter is formed smaller than the outer diameter of the pressing jaw, so that when the first movable member moves from one side to the other side, the pressing jaw contacts the step between the first opening hole and the second opening hole, The first movable member may move the second movable member.

The second movable member may form an inclined second inclined surface at a corner portion of the first open hole.

When the rod and the first movable member move from one side to the other side, the connecting member may move toward the inside of the seating groove by the second inclined surface.

The movement section of the rod is a first movement section in which the rod moves to be connected to the first movable member in a state of being separated from the first movable member, and the rod is connected to the first movable member to move the first movement section. It may include a second moving section in which the movable member moves together with the rod, and a third moving section in which the first movable member and the second movable member come into contact and move together with the first movable member and the second movable member. have.

The main switch unit includes a fixed electrode and a movable electrode connected to the first movable member or the second movable member, and when the first movable member or the second movable member moves, the movable electrode moves toward the fixed electrode, , may be in contact with the fixed electrode.

The fixing module is formed with a first fixing member formed in a hollow and having an opening through which the front end of the rod passes, formed in a hollow and connected to the other side of the fixing member, and moves together with the first fixing member. It may include a second fixing member forming an inner space in which the module is accommodated.

At one end of the first fixing member, an extension portion extending inwardly along the circumference may be formed, and the opening may be defined by the extension portion.

A stopper protruding inward may be formed along the circumference of the inner upper end of the second fixing member.

A first spring inserted between the stopper and the first movable member to provide force to push the first movable member away from the stopper, and inserted between the stopper and the second movable member to provide a force for pushing the first movable member away from the stopper, the second movable spring A second spring providing force to push the member away from the stopper may be included.

As described above, according to the disconnector interlocking type insulation housing according to the present invention, when a switch and a circuit breaker using an insulated housing are to be input, the disconnector is first input and then the main circuit is input later. The circuit is first opened and then the disconnector is opened. This is a driving method that is interlocked with a special structure. When closing or opening, no electrical shock is applied to the contact point of the disconnector, and the vacuum valve of the main circuit is responsible for all electrical shocks at the time of blocking and closing. This makes it possible to operate with one operation, which has the effect of maximizing the efficiency of operation.

In addition, the present invention, when viewed in an open state, satisfies all basic insulation in the vacuum valve, but additionally secures insulation in the disconnector to secure more safe insulation, thereby increasing the rated insulation strength, opening the switch and opening the switch to perform power outage or maintenance work Even in the case of operation, it is possible to maintain certain stability, which has the effect of maximizing the reliability of the operator.

In addition, the present invention has an environmentally friendly effect by using air for disconnector insulation.

In addition, the present invention can minimize the force required when connecting the rod and the connector.

In addition, the present invention also has the advantage of being able to firmly maintain the connection state between the rod and the connector.

In addition, the present invention can also minimize the force required when separating the rod and the connector.

In addition, the present invention also has the advantage of being able to reliably maintain the separation state between the fixed electrode and the movable electrode.

In addition, the present invention is designed to go through a plurality of steps when the fixed electrode and the movable electrode are switched from the open state to the closed state, so that in an uncertain situation, the fixed electrode and the movable electrode can be prevented from being switched to the closed state. .

That is, it is possible to prevent an accident in which the fixed electrode and the movable electrode are switched to the input state in an uncertain situation.

In addition, the present invention has an effect of improving insulation performance due to the double insulation structure and maintaining constant performance even during repeated use.

1 is a perspective view of a circuit breaker according to an embodiment of the present invention.
2 is a partially cut-away perspective view of a circuit breaker according to an embodiment of the present invention.
3 is a cross-sectional view showing a state in which the rod of the circuit breaker according to the embodiment of the present invention is lowered to the maximum value.
FIG. 4 is an enlarged view of a partial area of FIG. 3 .
5 is a cross-sectional view showing a state in which the rod of the circuit breaker according to the embodiment of the present invention is first raised to be accommodated inside the first movable member.
FIG. 6 is an enlarged view of a partial area of FIG. 5 .
7 is a cross-sectional view showing a state in which the rod is raised secondarily so that the first movable member of the circuit breaker according to the embodiment of the present invention is raised.
FIG. 8 is an enlarged view of a partial area of FIG. 7 .
9 is a cross-sectional view showing a state in which a rod is raised three times to be raised together with a first movable member and a second movable member of a circuit breaker according to an embodiment of the present invention.
FIG. 10 is an enlarged view of a partial area of FIG. 9 .

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the embodiments presented below, and those skilled in the art who understand the spirit of the present invention can find other embodiments included within the scope of the same spirit by adding, changing, deleting, and adding elements. Although it can be easily implemented, it will be said that this is also included within the scope of the spirit of the present invention.

The drawings accompanying the following embodiments are examples of the same inventive idea, but may be differently expressed for each drawing in terms of fine parts in order to be easily understood within the scope of not damaging the inventive idea. And, depending on the drawing, a specific part may not be displayed or may be exaggeratedly expressed according to the drawing.

1 is a perspective view of a circuit breaker according to an embodiment of the present invention. 2 is a partially cut-away perspective view of a circuit breaker according to an embodiment of the present invention. 3 is a cross-sectional view showing a state in which the rod of the circuit breaker according to the embodiment of the present invention is lowered to the maximum value. FIG. 4 is an enlarged view of a partial area of FIG. 3 . 5 is a cross-sectional view showing a state in which the rod of the circuit breaker according to the embodiment of the present invention is first raised to be accommodated inside the first movable member. FIG. 6 is an enlarged view of a partial area of FIG. 5 . 7 is a cross-sectional view showing a state in which the rod is raised secondarily so that the first movable member of the circuit breaker according to the embodiment of the present invention is raised. FIG. 8 is an enlarged view of a partial area of FIG. 7 . 9 is a cross-sectional view showing a state in which a rod is raised three times to be raised together with a first movable member and a second movable member of a circuit breaker according to an embodiment of the present invention. FIG. 10 is an enlarged view of a partial area of FIG. 9 .

Hereinafter, a circuit breaker 10 according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In addition, the circuit breaker 10 of the present invention may be formed as a vacuum circuit breaker.

In the following description, even if the circuit breaker 10 of the present invention is expressed as a 'vacuum circuit breaker', it should be noted that the scope of the present invention is not limited thereto.

In addition, the circuit breaker 10 of the present invention may be formed as an auxiliary switch integrated circuit breaker.

As shown in FIGS. 1 to 10, the circuit breaker 10 according to the present invention is configured to switch to either a closed state in which the incoming side and the outgoing side are electrically connected to each other or an open state in which they are electrically opened to each other. are provided

Referring to the drawings, the circuit breaker 10 according to the present invention includes a housing 100, a main switch unit 200, an auxiliary switch unit 300, and an operation unit 400.

The housing 100 covers the main switch unit 200 and the auxiliary switch unit 300, and is made of an insulating material such as epoxy to insulate the main switch unit 200 and the auxiliary switch unit 300. will lose

First, the main switch unit 200 includes a vacuum valve 210 having a vacuum inside, a primary conductor 220 installed on top of the vacuum valve 210 to flow electricity to the primary side, and a resistance A conductor 230 to be connected is installed.

For reference, voltage detection detects a low voltage passing through a resistor connected to the conductor 230 .

The vacuum valve 210 has a fixed electrode 211 installed on the inside top and a movable electrode installed on the inside bottom and contacting the fixed electrode 211 while sliding up and down according to the operation of the auxiliary switch unit 300 ( 212) will be included.

And, a contact space 213 is formed between the fixed electrode 211 and the movable electrode 212 so that the main circuit 200 can be inserted and opened.

In addition, a vacuum valve extinguishing pipe 214 is provided on the inner wall surface of the vacuum valve 210 to cover the vacuum valve 210 .

At this time, the vacuum valve extinguishing pipe 214 is made of ceramic.

In addition, silicon rubber may be provided on the outer surface of the vacuum valve 210 to protect the vacuum valve 210 during epoxy molding. In addition, a buffer layer may be formed on the outer surface of the vacuum valve 210 through silicon coating treatment or the like. In addition, a buffer layer may be formed on the outer surface of the vacuum valve 210 through silicon potting.

Meanwhile, the auxiliary switch unit 300 is provided below the vacuum valve 210. The auxiliary switch unit 300 is operated by manipulation of the control unit 400 and switches to either the input state (contact) or the open state (non-contact).

The auxiliary switch unit 300 is arranged to face the rod 310, one side of which is fixed to the control unit 400 and reciprocates in a straight line, and the other side of the rod 310, and the front end of the rod 310 It forms the groove part 301 into which it is inserted, and includes connectors 320 and 330, at least a part of which operates by the rod 310.

Then, the connecting member 340 is movably disposed inside the connectors 320 and 330, and when the front end 310a of the rod 310 is inserted into the groove 301, the front end of the rod 310 ( 310a) and a portion of the connectors 320 and 330 are brought into contact with each other, and the front end 310a of the rod 310 and a portion of the connectors 320 and 330 are connected.

Here, the meaning of 'connection' may mean a state in which a part of the connectors 320 and 330 moves together with the rod 310 when the rod 310 moves.

Thus, the connection member 340 may occur in various embodiments.

The connection member 340 has the same or similar force required when the rod 310 is connected to a portion of the connectors 320 and 330 and the force required when the rod 310 is separated from a portion of the connectors 320 and 330. It can be adopted within a range that can be maintained.

For example, the connecting member 340 may be provided with a ball-shaped metal material.

Hereinafter, the connecting member 340 will be referred to as a 'ball member' for better understanding.

That is, in the following description, the 'ball member' means the connecting member 340.

At the front end of the rod 310, an insertion groove 311 formed concave inward along the circumference is formed.

The insertion groove 311 is used as a space in which the ball member 340 is accommodated.

In addition, at the front end of the rod 310, a first inclined surface 312 having an inclined shape is formed at a corner portion.

The front end of the rod 310 can be easily inserted into the groove 301 by the first inclined surface 312 . In addition, the ball member 340 can more easily move toward the insertion groove 311 along the first inclined surface 312 .

The ball member 340 may be disposed in plurality along the inner circumferential surface of the groove portion 301 .

The ball members 340 may be spaced apart from each other along the inner circumferential surface of the groove 301 .

The ball member 340 may be disposed to be movable in a radial direction of the groove part 301 .

When the front end of the rod 310 is inserted into the groove 301, the ball member 340 gathers inward due to external factors, and one end of the ball member 340 is inserted into the insertion groove 311. And the other end is in contact with the inner circumferential surface of the moving module 320 to be described later, and accordingly, the rod 310 and the moving module 320 can be connected by the ball member 340.

When the front end of the rod 310 is inserted into the groove 301, the connectors 320 and 330 are connected to the rod 310 by the ball member 340, together with the rod 310. It includes a moving module 320 that moves.

In addition, the connectors 320 and 330 include a fixing module 330 that covers the moving module 320 and maintains a fixed state when the rod 310 and the moving module 320 move. .

The moving module 320 may include a first moving member 321 and a second moving member 326 .

The movement section of the rod 310 is a first movement in which the rod 310 moves to be connected to the first movable member 321 in a separated state (separated state) from the first movable member 321. A section G1 and a second moving section G2 in which the rod 310 is connected to the first movable member 321 so that the first movable member 321 moves together with the rod 310; The third moving section in which the rod 310, the first moving member 321, and the second moving member 326 move together by contacting the first moving member 321 and the second moving member 326 ( G3) may be included.

At this time, the movable electrode 212 of the main switch unit 200 is connected to the first movable member 321 and moves together with the first movable member 321, while the fixed electrode 211 of the main switch unit 200 ) can be moved to the side.

In addition, the movable electrode 212 of the main switch unit 200 is connected to the second movable member 326 and moves together with the second movable member 326, while the fixed electrode 211 of the main switch unit 200 ) may move to the side.

The first movable member 321 has a first groove 322 formed on one side into which the tip of the rod 310 is inserted, and a seating groove concave inward to insert the ball member 340 on the outside. 323 are spaced apart along the circumference, and a pressing jaw 324 protruding outward on the other side is formed along the circumference. The pressing jaw 324 may be formed on the upper side of the seating groove 323 .

The first movable member 321 may have a hollow shape. The hollow of the first movable member 321 may constitute the first groove part 322 .

Also, the seating groove 323 may be formed to communicate the outer side of the first movable member 321 and the hollow.

The seating groove 323 may form a first opening 323a communicating with the outside of the first movable member 321 and a second opening 323b communicating with the hollow of the first movable member 321. have.

Here, the diameter of the first opening 323a or the second opening 323b may be smaller than that of the ball member 340 .

Therefore, the ball member 340 inserted into the seating groove 323 does not escape into the first opening 323a or the second opening 323b, and can maintain a state accommodated inside the seating groove 323.

As another example, the diameter of the first opening 323a may be equal to or larger than the diameter of the ball member 340 . Also, the diameter of the second opening 323b may be smaller than that of the ball member 340 .

Accordingly, the ball member 340 may come out through the first opening 323a.

In addition, the ball member 340 inside the seating groove 323 may be accommodated in the seating groove 323 to be movable in the radial direction of the first movable member 321 .

In addition, the seating groove 323 has a first inclined portion 323c whose inner diameter gradually expands inward from the first opening 323a and a second inclined portion 323c whose inner diameter gradually decreases toward the second opening 323b. A portion 323d may be formed.

In this case, the slope of the first inclined portion 323c may be smaller than that of the second inclined portion 323d.

In addition, at least a part of the inner diameter of the seating groove 323 may be formed larger than the outer diameter of the ball member 340 .

For example, the diameter of the boundary portion 323e between the first inclined portion 323c and the second inclined portion 323d may be larger than the outer diameter of the ball member 340 .

In addition, a third inclined portion 322b having a gradually narrowing inner diameter may be formed at an end of the first movable member 321 defining the inlet 322a of the first groove portion 322 .

In addition, a concave cavity 322c may be formed along the circumference of the inner circumferential surface of the first movable member 321, and a ring-shaped auxiliary spring 322d may be inserted into the cavity 322c.

The seating grooves 323 may be formed in plurality by being spaced apart from each other along the outer diameter of the first movable member 321 .

For example, four seating grooves 323 may be provided at equal intervals along the outer diameter of the first movable member 321 .

At this time, the seating groove 323 may be disposed perpendicular to the neighboring seating groove 323 .

Also, a total of four ball members 340 may be provided in the same manner as the seating grooves 232, and the ball members 340 may be inserted into each seating groove 232.

Meanwhile, an inclined portion 325 having a narrow inner diameter from one side to the other side is formed inside the first movable member 321 .

In addition, the connecting means 350 connected to the movable electrode 212 of the main switch unit 200 is exposed in the hollow portion 325a defined by the end of the inclined portion 325 .

Therefore, the front end 310a of the rod 310 entering the inside of the first movable member 321 presses the connecting means 350, and as a result, the movable electrode 212 connected to the connecting means 350 can be pressurized.

The connecting means 350 may be integrally coupled with the first movable member 321 .

The connecting means 350 may be fastened to the first movable member 321 in various ways within a range in which the first movable member 321 can move up and down together when the first movable member 321 moves up and down.

For example, the connecting means 350 may pass through the top of the first movable member 321 and be fastened to the first movable member 321 by a separate fastening means.

Meanwhile, the second movable member 326 has a hollow shape.

The second movable member 326 is formed with a first opening hole 327 having a first inner diameter D1 to accommodate at least a part of the first movable member 321 on one side, and on the other side of the first inner diameter A second open hole 328 having a second inner diameter D2 smaller than (D1) may be formed.

In addition, the second inner diameter D2 is smaller than the outer diameter D3 of the pressing jaw 324, so that when the first movable member 321 moves from one side to the other side, the pressing jaw 324 It contacts the first step 329a between the first opening hole 327 and the second opening hole 328, and accordingly, the first movable member 321 moves the second movable member 326.

As described above, the movement period of the rod 310 is such that the rod 310 is connected to the first movable member 321 in a separated state (separated state) from the first movable member 321. A first moving section G1 in which the rod 310 moves and a second moving section in which the rod 310 is connected to the first moving member 321 and the first moving member 321 moves together with the rod 310 (G2), the first movable member 321 and the second movable member 326 come into contact so that the rod 310, the first movable member 321 and the second movable member 326 move together It includes the third movement section (G3).

For reference, the first movement section G1 may mean a movement section when the rod moves from the position shown in FIG. 3 to the position shown in FIG. 5 . Also, the second movement section G2 may refer to a movement section when the rod moves from the position shown in FIG. 5 to the position shown in FIG. 7 . Also, the third movement section G3 may mean a movement section when the rod moves from the position shown in FIG. 7 to the position shown in FIG. 9 .

In addition, the second moving section G2 may mean a distance between the stepping step 329a and the pressing step 324 before the first moving member 321 moves.

The second movable member 326 forms an inclined second inclined surface 327a at a corner portion of the first open hole 327 .

When the rod 310 and the first movable member 321 move from one side to the other, the ball member 340 moves to the inside of the seating groove 323 by the second inclined surface 327a. .

Before the rod 310 enters the first movable member 321, the center of the ball member 340 is positioned lower than the second inclined surface 327a. In addition, a part of the ball member 340 is in a state of being protruded outward from the first movable member 321 .

And, when the rod 310 enters the inside of the first movable member 321 and the rod 310 moves the first movable member 321, the ball member 340 together with the first movable member 321 will move

Also, the ball member 340 gradually moves toward the inside of the seating groove 323 along the second inclined surface 327a while being in contact with the second inclined surface 327a. And, when passing through the second inclined surface 327a, the state of being moved to the inside of the seating groove 323 is maintained by the inner wall of the first open hole 327 whose inner diameter is kept constant.

In addition, at least a portion of the ball member 340 moved inside the seating groove 323 may pass through the second opening 323b and be accommodated in the insertion groove 311 of the rod 310.

And, while the ball member 340 is accommodated in the seating groove 323 and the insertion groove 311 as described above, the first movable member 321 and the rod 310 can be coupled.

Meanwhile, as described above, when the first movable member 321 and the rod 310 are coupled, the first movable member 321 and the rod 310 move together. And, the connecting means 350 coupled with the first movable member 321 also moves together with the first movable member 321 and the rod 310 .

Then, the movable electrode 212 connected to the connecting means 350 moves toward the fixed electrode 211 and comes into contact with the fixed electrode 311 .

Meanwhile, the fixing module 330 may include a first fixing member 331 and a second fixing member 336 .

First, the first fixing member 331 forms a hollow 332, and an opening 333 through which the front end of the rod 310 passes is formed on one side.

In addition, the first fixing member 331 has an extension 334 extending inward along the circumference at one end (lower end in the drawing), and the opening 333 is the end of the extension 334. can be defined by

A lower end of the first movable member 321 may be seated at an upper end of the extension part 334 .

In detail, in a situation where the first movable member 321 does not move along with the rod 310, the lower end of the first movable member 321 may remain seated on the upper end of the extension part 334.

In addition, a third inclined surface 333a may be formed at one corner of the opening 333 .

The second fixing member 336 forms a hollow 337, is connected to the other side of the first fixing member 331, and accommodates the moving module 320 together with the first fixing member 331. form a space

In addition, a stopper 338 protruding inward is formed along the circumference of the inner upper end of the second fixing member 336 .

When the second movable member 326 ascends, the stopper 338 contacts the upper end of the second movable member 326 and limits the upward movement of the second movable member 326 .

In addition, the lower end of the vacuum valve extinguishing cylinder 214 may be coupled to the upper end of the second fixing member 336 .

The inner diameter of the inner circumferential surface of the upper side of the first fixing member 331 is expanded to form a stepped portion 335 .

In addition, the lower end of the second fixing member 336 and the lower end of the second movable member 326 may be seated on the stepped portion 335 .

Here, the inner diameter D4 of the first fixing member 331 may be larger than the first inner diameter D1 of the first opening hole 327 of the second movable member 326 .

Before the rod 310 enters the inside of the first movable member 321, the center of the ball member 340 may be located inside the first fixing member 331.

For example, before the rod 310 enters the first movable member 321, the center of the ball member 340 is located at the same position as the stepped part 335 or lower than the stepped part 335. It can be.

In addition, at least a portion of the ball member 340 is in a state where it is protruded outward from the first movable member 321 .

And, when the rod 310 enters the inside of the first movable member 321 and the rod 310 moves the first movable member 321, the ball member 340 together with the first movable member 321 will move

Also, the ball member 340 gradually moves toward the inside of the seating groove 323 along the second inclined surface 327a while being in contact with the second inclined surface 327a. And, when passing through the second inclined surface 327a, the state of being moved to the inside of the seating groove 323 is maintained by the inner wall of the first open hole 327 whose inner diameter is kept constant.

In addition, a first spring 360 is inserted between the stopper 338 and the first movable member 321 to provide force to push the first movable member 321 from the stopper 338 side. .

Both ends of the first spring 360 are supported in contact with the lower end of the stopper 338 and the upper end of the pressure jaw 324, respectively, to move the first movable member 321 in the opposite direction to the stopper 338. provides pushing force.

In addition, a second spring 370 is inserted between the stopper 338 and the second movable member 326 to provide a force to push the second movable member 326 from the stopper 338 side. .

The outer diameter of the second movable member 326 is expanded on the outer circumferential surface to form a second step 329b. Both ends of the second spring 370 are supported in contact with the lower end of the stopper 338 and the second step 329b, respectively, to move the second movable member 321 in the opposite direction to the stopper 338. provides pushing force.

Hereinafter, the operating process of the circuit breaker 10 configured as described above will be described.

First, in the standby state, the rod 310 is in a lowered state.

And, the rod 310 is in a state of being spaced apart from the moving module 320 .

In addition, the first movable member 321 and the second movable member 326 are lowered by the pushing force of the first spring 360 and the second spring 370, respectively.

In addition, the first movable member 321 and the second movable member 326 will inevitably be in a lowered state even by their own weight.

Also, in this state, the center of the ball member 340 may be positioned at the same position as the stepped portion 335 or lower than the stepped portion 335 .

In addition, at least a portion of the ball member 340 is in a state where it is protruded outward from the first movable member 321 . That is, at least a portion of the ball member 340 protrudes outward from the seating groove 323 .

In addition, in this state, the movable electrode 212 connected to the first movable member 321 is also in a lowered state, so the movable electrode 212 and the fixed electrode 211 are separated from each other and are electrically separated from each other in an open state.

At this time, the rod 310 may move through the control unit 400 .

The control unit 400 may be manually operated by a worker's power. In addition, the control unit 400 may be operated in an electric manner through a separate driving means.

The control unit 400 provides a lifting force. That is, the control unit 400 provides a force for raising the rod 310 or a force for lowering the rod 310 .

Hereinafter, a process of converting the fixed electrode 211 and the movable electrode 212 from an open state to a closed state will be described.

The rod 310 rises by the control unit 400 . In detail, the rod 310 rises to be connected to the first movable member 321 .

When the rod 310 rises, the front end 310a of the rod 310 first passes through the opening 333 of the first fixing member 331 .

Then, it enters the first groove 322 through the inlet 322a of the first movable member 321 .

Then, when the front end 310a of the rod 310 contacts the inner surface of the first movable member 321 or the connecting means 350 contacts, the first movable member 321 rises together with the rod 310. will do And, when the first movable member 321 rises, the ball member 340 also rises together with the first movable member 321 .

Also, the ball member 340 gradually moves toward the inside of the seating groove 323 along the second inclined surface 327a while being in contact with the second inclined surface 327a. And, when passing through the second inclined surface 327a, the state of being moved to the inside of the seating groove 323 is maintained by the inner wall of the first open hole 327 whose inner diameter is kept constant.

In addition, at least a portion of the ball member 340 moved inside the seating groove 323 may pass through the second opening 323b and be accommodated in the insertion groove 311 of the rod 310.

And, while the ball member 340 is accommodated in the seating groove 323 and the insertion groove 311 as described above, the first movable member 321 and the rod 310 can be coupled.

Then, the first movable member 321 rises together with the rod 310 .

At this time, the first spring 360 is compressed.

As described above, when the first movable member 321 ascends, the pressing jaw 324 of the first movable member 321 comes into contact with the first step 329a of the second movable member 326, From this time, the second movable member 326 is raised together with the first movable member 321 .

At this time, the second spring 370 is compressed.

In addition, when the first movable member 321 rises as described above, the connecting means 350 also rises, and the movable electrode 212 also rises, and the fixed electrode 211 disposed above the movable electrode 212 getting closer and closer

And, when the first movable member 321 and the second movable member 326 rise, the upper end of the second movable member 326 comes into contact with the stopper 338 of the second fixing member 336, , At this time, the movable electrode 212 contacts the fixed electrode 211 and is electrically connected.

Hereinafter, a process in which the fixed electrode 211 and the movable electrode 212 are converted from a closed state to an open state will be described.

In the input state, the rod 310 is in a state of being raised to the maximum, and thus the movable electrode 212 is in contact with the fixed electrode 211 .

At this time, the control unit 400 provides a downward force to the rod 310 .

When the control unit 400 and the rod 310 descend, the fixed electrode 211 and the movable electrode 212 are separated and gradually move away from each other. And, the first movable member 321 and the second movable member 326 also descend.

While the first movable member 321 and the second movable member 326 descend as described above, the lower end of the second movable member 326 contacts the stepped portion 335 of the first fixing member 331 and , the lowering operation of the second movable member 326 is stopped. At this time, the second movable member 326 may maintain a lowered state by the pushing force of the second spring 370 and its own weight.

Then, the first movable member 321 continues to descend.

Then, while the first movable member 321 descends together with the rod 310 as described above, the lower end of the first movable member 321 contacts the extension 334 of the first fixing member 331, and 1 The descending motion of the movable member 321 stops.

At this time, when the rod 310 continues to descend, when the ball member 340 is separated from the rod 310, the first movable member 321 maintains a fixed state, and only the rod 310 continues to descend.

In detail, when the rod 310 continues to descend, the ball member 340 gradually moves to the outside of the seating groove 323 by the second inclined surface 327a whose inner diameter extends from top to bottom. Then, the ball member 340 comes out of the insertion groove 311 of the rod 310, and accordingly, the connection between the first movable member 321 and the rod 310 is released, and only the rod 310 continues. descend

Then, when the rod 310 reaches the maximum lowering position, similarly to the standby state, the control unit 400 and the rod 310 are stopped.

That is, in the case of the present invention, the movable electrode 212 and the rod 310 are coupled through the ball member 340, resulting in a structure in which electricity can proceed.

In addition, the second movable member 326 has a structure in which the second movable member 326 is separated from the rod 310 while the lowering motion of the second movable member 326 is restricted by the first fixing member 331 .

In addition, during the closing stroke, after the primary coupling of the disconnector by the movement of the rod 310, the main circuit part separated by the engaging operation of the ball member 340 is input, and during the open stroke, the rod 310 and the main circuit part moves as one body, the main circuit is separated first, and then the rod 310 is separated from the disconnector base.

According to the present invention as described above, it is possible to minimize the force required when connecting the rod 310 and the connectors 320 and 330 .

In addition, there is an advantage in that the connection state of the rod 310 and the connectors 320 and 330 can be firmly maintained.

In addition, the force required for separating the rod 310 and the connectors 320 and 330 can also be minimized.

In addition, there is an advantage in that the separation state between the fixed electrode 211 and the movable electrode 212 can be reliably maintained.

In addition, when the fixed electrode 211 and the movable electrode 212 are switched from the open state to the closed state, it is designed to go through a plurality of steps, and in an uncertain situation, the fixed electrode 211 and the movable electrode 212 are closed. It can be prevented from switching to the state.

That is, it is possible to prevent an accident in which the fixed electrode 211 and the movable electrode 212 are switched to the input state in an uncertain situation.

10: breaker 100: housing
200: main switch unit 211: fixed electrode
212: movable electrode 300: auxiliary switch unit
310: rod 320: moving module
321: first movable member 326: second movable member
330: fixing module 331: first fixing member
336: second fixing member 340: connecting member
350: connecting means 360: first spring
370: second spring 400: control unit

Claims (19)

In a circuit breaker that switches between a closing state in which the incoming side and the outgoing side are electrically connected to each other or an open state in which they are electrically opened to each other,
control panel,
An auxiliary switch unit that is operated by manipulation of the control unit and switches to one of the closed state and the open state;
Including a main switch unit that is operated by the operation of the auxiliary switch unit and switches to any one of the closed state and the open state,
The auxiliary switch unit:
a rod having one side fixed to the control unit and moving in a straight line;
a connector disposed to face the other side of the rod, forming a groove into which the front end of the rod is inserted, and at least a part operated by the rod; and
A connecting member disposed movably inside the connector and contacting a portion of the connector with the tip of the rod when the tip of the rod is inserted into the groove,
The connection member is provided in a ball shape, and a plurality of circuit breakers are disposed along the inner circumferential surface of the groove.
delete According to claim 1,
A circuit breaker forming an insertion groove concavely formed inwardly along the circumference at the front end of the rod.
According to claim 1,
A circuit breaker forming a first inclined surface in an inclined shape at a corner portion at the tip of the rod.
delete According to claim 1,
The connector is:
When the tip of the rod is inserted into the groove, the moving module is connected to the rod by the connecting member and moves together with the rod; and
A circuit breaker comprising a fixed module covering the moving module and maintaining a fixed state when the load and the moving module move.
According to claim 6,
The mobile module,
A first groove into which the tip of the rod is inserted is formed on one side,
Seating grooves concave to the inside so that the connection member is inserted on the outside are spaced apart along the circumference,
A circuit breaker comprising a first movable member formed along a circumference of a pressing jaw protruding outward on the other side.
According to claim 7,
A circuit breaker in which an inclined portion having an inner diameter narrowing from one side to the other side is formed on the inside of the first movable member.
According to claim 8,
A circuit breaker in which a hollow portion is defined by an end of the inclined portion, and a connecting means connected to the movable electrode of the main switch unit is exposed in the hollow portion.
According to claim 7,
The mobile module,
A first open hole having a first inner diameter is formed on one side to accommodate at least a portion of the first movable member,
A circuit breaker comprising a second movable member having a second opening hole having a second inner diameter smaller than the first inner diameter formed on the other side.
According to claim 10,
The second inner diameter is smaller than the outer diameter of the pressing jaw, so that when the first movable member moves from one side to the other side,
The pressing jaw is in contact with the step between the first opening hole and the second opening hole,
A circuit breaker in which the first movable member moves the second movable member.
According to claim 10,
The second movable member forms a second inclined surface in an inclined shape at a corner portion of the first opening hole.
According to claim 12,
When the rod and the first moving member move from one side to the other side,
The connection member is moved to the inside of the seating groove by the second inclined surface.
According to claim 10,
The movement range of the rod is:
a first moving section in which the rod moves to be connected to the first moving member in a state of being separated from the first moving member;
a second moving section in which the rod is connected to the first moving member and the first moving member moves together with the rod; and
and a third movable section in which the first movable member and the second movable member come into contact with each other and the first movable member and the second movable member move together.
According to claim 10,
The main switch unit includes a fixed electrode and a movable electrode connected to the first movable member or the second movable member,
When the first movable member or the second movable member moves, the movable electrode moves toward the fixed electrode and contacts the fixed electrode.
According to claim 10,
The fixed module is:
A first fixing member that is hollow and has an opening at one side through which the front end of the rod passes; and
A circuit breaker comprising a second fixing member that forms a hollow, is connected to the other side of the first fixing member, and forms an inner space in which the moving module is accommodated together with the first fixing member.
According to claim 16,
The circuit breaker of claim 1 , wherein the first fixing member has an extension portion extending inward along a circumference at one end thereof, and wherein the opening is defined by the extension portion.
According to claim 16,
A circuit breaker in which a stopper protruding inward is formed along the circumference of the inner upper end of the second fixing member.
According to claim 18,
a first spring inserted between the stopper and the first movable member to provide force to push the first movable member away from the stopper; and
and a second spring inserted between the stopper and the second movable member to provide a force pushing the second movable member away from the stopper.

Images