KR102378569B1 - Air circuit breaker - Google Patents

Abstract

The present invention provides an air circuit breaker. The air circuit breaker includes a circuit breaker body; a accommodating part formed in the circuit breaker body and having an internal space in which the arc extinguishing part is accommodated; and a sliding coupling part formed in the accommodating part and guiding the arc extinguishing part to be slidably inserted and coupled to the inner space of the accommodating part.

Description

Air Breaker {AIR CIRCUIT BREAKER}

The present invention relates to an air circuit breaker, and more particularly, to an air circuit breaker capable of improving productivity by simplifying the extinguishing unit assembly process by mounting the extinguishing unit to the circuit breaker body without a separate fastening member.

In general, the arc extinguishing unit of the air circuit breaker is used for stable current interruption by extinguishing the arc generated when the circuit breaker interrupts the accidental current.

The principle of arc extinguishing of an air circuit breaker is as follows.

When a fault current flows into a circuit breaker due to a power system line accident, etc., the fault current is sensed and the interruption is induced by the mechanism driving unit. At this time, an arc occurs when the contact is separated.

Here, the magnitude of the arc energy generated as described above is proportional to the magnitude of the current, and the larger the magnitude of the current, the larger the magnitude of the generated arc energy is formed.

Therefore, as the arc energy generated in the arc extinguishing unit by the fault current increases, the internal pressure also increases, so it is important that the arc extinguishing unit is installed so as not to be separated from the inside of the circuit breaker body.

1 is a perspective view showing a state in which extinguishing units are fastened to a conventional air circuit breaker.

Referring to Figure 1, the circuit breaker body of the conventional air circuit breaker is formed with a plurality of extinguishing unit accommodation chamber.

The plurality of arc extinguishing unit accommodating chambers are formed in a shape that is opened to the upper portion of the circuit breaker body, and a predetermined space is formed inside the circuit breaker body.

In addition, each of the plurality of arc extinguishing units is disposed to be inserted into each of the plurality of arc extinguishing unit accommodating chambers formed in the circuit breaker body.

The plurality of arc extinguishing units arranged as described above are fixedly installed on the circuit breaker body portion through a plurality of fastening bolts, so that separation due to an increase in flow and internal pressure can be prevented.

However, in the prior art, since a plurality of fastening bolts are used to fix the arc-extinguishing units inserted into the arc-extinguishing unit accommodating chamber of the circuit breaker main body, the number of members such as fastening bolts input to fixing the arc-extinguishing unit is increased, and the arc-extinguishing unit using the fastening bolts is increased. There is a problem in that the working time according to the fixing is increased.

As a prior document related to the present invention, Korean Public Utility Publication No. 2019990038669 (1999.10.25) discloses a technology for an assembly structure of a power circuit breaker in the air.

It is an object of the present invention to provide an air circuit breaker capable of sliding and inserting a fire extinguishing unit into an accommodation chamber formed in the circuit breaker body.

Another object of the present invention is to enable sliding insertion in the sliding hole formed in the accommodation chamber using a partial configuration of the arc extinguishing unit, and to be caught in the locking groove when fixed, so that the operation according to the use of a separate fastening member as in the prior art It is to provide an air circuit breaker that can reduce time wastage and production cost.

In a preferred aspect, the present invention provides an air barrier.

The air circuit breaker includes a circuit breaker body; a accommodating part formed in the circuit breaker body and having an internal space in which the arc extinguishing part is accommodated; and a sliding coupling part formed in the accommodating part and guiding the arc extinguishing part to be slidably inserted and coupled to the inner space of the accommodating part.

The sliding coupling portion may include sliding holes formed on both sides of the inner space.

It is preferable that both ends of the plate formed on the upper end of the arc extinguishing unit are slidingly inserted and coupled to the sliding hole.

It is preferable that one side of the circuit breaker body is open, and the pair of sliding holes are formed in a horizontal direction so as to be parallel to a bottom surface of the circuit breaker body.

It is preferable that the pair of sliding holes is provided with a coupling groove having a predetermined depth downward, and a coupling protrusion to be fitted into the coupling groove is formed on the plate.

The circuit breaker body portion includes a cover portion.

Preferably, the cover part is coupled to one side of the circuit breaker body part so as to closely support the arc extinguishing part accommodated in the accommodation part.

Meanwhile, an upper portion of the circuit breaker body may be opened.

Preferably, the pair of sliding holes are formed along a vertical direction to be perpendicular to the bottom surface of the circuit breaker body, and a sliding protrusion is formed in the arc extinguishing unit so as to be slidably inserted and coupled to the sliding hole along the vertical direction. Do.

An upper portion of the circuit breaker body may be opened.

The sliding hole is formed in a vertical direction so as to be perpendicular to the bottom surface of the circuit breaker main body, and on both sides of the plate of the arc extinguishing unit, sliding protrusions that are slidably inserted and coupled to the sliding hole along the vertical direction are formed. it is preferable

Preferably, a coupling groove along a horizontal direction is further formed at a predetermined position of the sliding hole, and the sliding protrusion moving in the horizontal direction is coupled to the coupling groove.

One side of the circuit breaker body part is opened so that the receiving part is opened.

In this case, it is preferable that the circuit breaker body part includes a cover part, and the cover part closes the opening and is coupled to one side of the circuit breaker body part so as to closely support the arc extinguishing part accommodated in the accommodation part.

The present invention has the effect that the arc extinguishing unit can be slidably inserted and coupled to the accommodating chamber formed in the circuit breaker body.

In addition, the present invention enables sliding insertion in the sliding hole formed in the accommodation chamber by using a partial configuration of the arc extinguishing unit, and is caught in the locking groove when fixed, so that the working time according to using a separate fastening member as in the prior art It has the effect of reducing waste and production cost.

1 is a perspective view showing that the extinguishing unit is fastened to a conventional air circuit breaker.
Figure 2 is an exploded perspective view showing the air circuit breaker of the present invention.
3 is a side view showing a circuit breaker body according to the present invention.
4 is a side view showing an arc extinguishing unit according to the present invention.
5 is a perspective view showing a state in which the arc extinguishing unit is slidingly inserted and coupled to the circuit breaker body according to the present invention.
6 is a perspective view showing that the arc extinguishing unit is slidingly inserted and coupled to the circuit breaker body through an example in which a coupling groove is formed in the sliding hole according to the present invention.
7 is a perspective view showing a state in which the arc extinguishing unit is horizontally slidably inserted into the receiving part of the circuit breaker body of FIG. 6 .
8A and 8B are views illustrating a process in which the arc extinguishing unit is horizontally slidably inserted into the receiving part of the circuit breaker body.
9 is a perspective view showing an example in which arc extinguishing units according to the present invention are slidingly coupled by descending from the upper part of the circuit breaker body.
10 is a perspective view showing a state in which the arc extinguishing unit is vertically slidably inserted into the receiving part of the circuit breaker body according to the present invention.
11 is a perspective view showing an example in which a coupling groove along a horizontal direction is further formed in a sliding hole along a vertical direction.
12 is a view showing a process in which the arc extinguishing unit is slidably inserted and coupled to the receiving unit of FIG. 11 .
13 is a view showing a state in which the arc extinguishing unit is slidably inserted and coupled to the receiving unit of FIG. 11 .

Hereinafter, the air circuit breaker of the present invention will be described for each embodiment with reference to the accompanying drawings.

first embodiment

Figure 2 is an exploded perspective view showing the air circuit breaker of the present invention, Figure 3 is a side view showing the circuit breaker body according to the present invention, Figure 4 is a side view showing the extinguishing unit according to the present invention, Figure 5 is the circuit breaker body according to the present invention It is a perspective view showing a state in which the arc extinguishing unit is slidingly inserted and coupled to the unit.

2 and 3 , the first embodiment of the present invention is an example in which the arc extinguishing unit 200 is slidably inserted into the circuit breaker body 110 in a horizontal direction.

Preferably, the horizontal direction is parallel to the bottom surface of the circuit breaker body 110 .

The air circuit breaker of the present invention is composed of a circuit breaker body portion 110 , a receiving portion 130 , and a sliding coupling portion 111 . Hereinafter, the configuration number of the sliding coupling portion and the sliding hole will be described as '111'.

The accommodating part 130 forms an inner space in the circuit breaker body part 110, and is opened to one side.

The accommodating part 130 as described above is provided in plurality, and is formed at equal intervals on the circuit breaker body part 110 .

The sliding coupling unit 111 may slide insert and couple the plurality of arc extinguishing units 200 to each of the plurality of receiving units 130 .

The sliding coupling part 111 is formed of a pair of sliding holes 111 formed in each of the receiving parts 130 .

Here, the inner space of each accommodating part 130 is formed of a wall formed along the vertical direction to form the inner space.

The pair of sliding holes 111 are formed to face each other in the inner space, and one end of the pair of sliding holes 111 is opened at one side of the circuit breaker body 110 .

The pair of sliding holes 111 are formed in a horizontal direction to be parallel to the bottom surface of the circuit breaker body 110 .

And, as shown in FIG. 2 , the cover part 120 is installed on one side of the circuit breaker body part 110 . The cover part 120 is fastened to one side of the circuit breaker body part 110 through a separate fastening bolt (B) and coupled thereto.

Of course, although not shown in the drawings, one side of the cover 120 and the circuit breaker body 110 may also be coupled in a sliding manner as described above.

Accordingly, the cover unit 120 can prevent the arc extinguishing unit 200 slidingly coupled to the sliding hole 111 from being separated to the outside.

On the other hand, referring to FIGS. 2 and 4 , the arc extinguishing unit 200 according to the present invention is composed of an arc extinguishing unit body 210 and a plate-like plate 220 formed on the upper end of the arc extinguishing unit body 210 .

Here, referring to FIG. 5 , both ends of the plate 220 provide a horizontal direction to a pair of sliding holes 111 formed in each receiving unit 130 through one side of the circuit breaker body 110 that is opened. inserted according to

And, when the plate 220 is slidably inserted and coupled to the pair of sliding holes 111 , the corresponding arc extinguishing unit 200 may be accommodated in the inner space of the receiving unit 130 .

In the same manner as described above, each of the plurality of extinguishing units 200 is inserted and coupled to the plurality of receiving units 130 formed in the circuit breaker body 110 by sliding along the horizontal direction.

Then, as shown in FIG. 2 , the cover part 120 is fastened to one side of the circuit breaker body part 110 through fastening bolts B and is coupled thereto.

Accordingly, the cover unit 120 closely supports the plurality of arc extinguishing units 200 accommodated in the accommodating unit 130 , and may seal open side portions of the accommodating units 130 .

By the above configuration and action, each of the arc extinguishing units 200 according to the present invention uses the plate 220, which is a part of itself, of the receiving unit 200 through the sliding hole 111 formed in each of the receiving units 130. By slidingly inserted into the inner space and combined, it can be easily fixed and installed on the circuit breaker body 110 without using separate fastening members.

In addition, since both ends of the plate 220 span the sliding hole 111 in the extinguishing unit 200 according to the present invention during extinguishing, even if an inner pressure is generated inside the circuit breaker body 110 during extinguishing, the may not escape.

6 is a perspective view showing that the arc extinguishing unit is slidably inserted and coupled to the circuit breaker main body through an example in which a coupling groove is formed in the sliding hole according to the present invention, and FIG. It is a perspective view showing the inserted state, and FIGS. 8A and 8B are views showing a process in which the arc extinguishing unit is horizontally slidably inserted into the receiving part of the circuit breaker body.

Referring to FIG. 6 , a coupling groove 112a extending downward to a predetermined depth is formed at a predetermined position of the pair of sliding holes 112 according to the present invention.

Two coupling grooves 112a may be formed in each of the pair of sliding holes 112 .

In addition, coupling protrusions 221 protruding along the lower side to fit into the above-described coupling grooves 112a are formed at both ends of the plate 220 of the arc extinguishing unit 200 .

Two coupling protrusions 221 are formed on each of both ends of the plate 220 .

Referring to the above configuration and FIGS. 7 to 8B , the arc extinguishing unit 200 may be inserted into the inner space of the receiving unit 130 through an open side of the circuit breaker body 110 .

That is, as shown in FIGS. 7 and 8A , both ends of the plate 220 of the arc extinguishing unit 200 are sequentially fitted into a pair of sliding holes 112 formed in the corresponding receiving unit 130 .

And, as shown in Fig. 8b, when the engaging projection 221 of the plate 220 reaches the position of the engaging groove 112a formed in the corresponding sliding hole 112, it is lowered to fit into the engaging groove 112a. .

Accordingly, the arc extinguishing unit 200 may be lowered so that the coupling protrusions 221 formed on each of both ends of the plate 220 are fitted into the coupling grooves 112a of the corresponding positions to be coupled.

In addition, the cover part 120 may be coupled to one side of the circuit breaker body part 110 . Since the installation of the cover part 120 is the same as described above, a description thereof will be omitted.

However, a fixing member 121 protruding from one side of the cover part 120 is formed.

The fixing member 121 enters a space between the plate 220 and the ceiling surface of the sliding hole 112 to support the plate 220 and the ceiling surface of the sliding hole 112 .

By the above configuration and action, the arc extinguishing unit 200 is horizontally slidably inserted into the receiving part, and the coupling protrusion 221 is coupled to the coupling groove 112a by being supported by the coupling groove 112a, thereby effectively preventing the flow along the horizontal direction.

In addition, since the ceiling surface of the sliding hole 112 and the upper surface of the plate 220 are supported by the fixing member 121 formed on one side of the cover part 120 , the arc extinguishing part 200 moves upward when extinguishing the arc. The flow to the furnace can be effectively prevented, and further, external departure can be prevented.

second embodiment

9 is a perspective view showing an example in which the arc extinguishing units according to the present invention are slidingly coupled by descending from the upper part of the circuit breaker body, and FIG. .

9 and 10 , the second embodiment of the present invention is an example in which the arc extinguishing unit 200 is slidably inserted into the circuit breaker body 300 in a vertical direction.

The vertical direction preferably forms a direction perpendicular to the bottom surface of the circuit breaker body 300 .

Air circuit breaker of the present invention is composed of a circuit breaker body portion 300, a receiving portion 330, and a sliding coupling portion (311). Hereinafter, the configuration number of the sliding coupling part 311 will be described in the same way as the sliding hole 311 .

The accommodating part 330 forms an inner space in the circuit breaker body 300 and is opened through the upper end of the circuit breaker body 300 .

The accommodating part 330 as described above is provided in plurality, and is formed at equal intervals in the circuit breaker body part 300 .

The sliding coupling part 311 may slide insert and couple the plurality of arc extinguishing parts 200 to each of the plurality of receiving parts 330 in a vertical direction.

The vertical direction is a direction perpendicular to the bottom surface of the circuit breaker body 300 .

The sliding coupling part 311 is formed of a pair of sliding holes 311 formed in each of the receiving parts 330 .

Here, the inner space of each accommodating part 330 has a wall formed along the vertical direction to form the inner space.

The pair of sliding holes 311 are formed to face each other in the inner space, and one end of the pair of sliding holes 311 is opened toward the upper end of the circuit breaker body 300 .

The pair of sliding holes 311 are formed in a vertical direction to be perpendicular to the bottom surface of the circuit breaker body 300 .

And, as shown in FIG. 9 , the cover part 301 may be integrally configured with one side of the circuit breaker body 300 , or may be detachably configured to be coupled to one side of the circuit breaker body 300 . can

Accordingly, as in the case where the cover part 301 is installed on one side of the circuit breaker body part 300 , fastening members may not be required.

On the other hand, as shown in FIGS. 9 and 10 , a pair of sliding protrusions 222 slidingly inserted into a pair of sliding holes 311 are formed on both sides of the arc extinguishing unit 200 to form a predetermined length along the top and bottom. is formed

Preferably, each of the sliding protrusions 222 is formed to protrude along the upper and lower sides, respectively, on both sides of the plate 220 of the arc extinguishing unit 200 and the arc extinguishing unit body 210 .

In addition, although not shown in the drawings, referring to FIG. 10 , a separate cover may be further coupled to the upper end of the circuit breaker body 300 to regulate the upper end of each arc extinguishing unit 200 .

By the above configuration and action, a pair of sliding protrusions 222 formed on both sides of each of the arc extinguishing units 200 according to the present invention are accommodated through the sliding holes 311 formed in each of the receiving units 330 . By slidingly inserted into the inner space of the unit 330 in the vertical direction and coupled, it can be easily fixed and installed in the circuit breaker body without using separate fastening members.

11 is a perspective view showing an example in which a coupling groove along a horizontal direction is further formed in a sliding hole along a vertical direction, FIG. 12 is a view showing a process in which the arc extinguishing unit is slidably inserted and coupled to the receiving unit of FIG. 11, and FIG. 13 is It is a view showing a state in which the arc extinguishing unit is slidably inserted and coupled to the receiving unit of FIG. 11 .

Referring to FIG. 11 , each sliding hole 311 formed along the vertical direction on both side walls of the inner space of the accommodating part 330 has a coupling groove 312 .

The coupling groove 312 extends from a predetermined position of the corresponding sliding hole 311 to a predetermined depth along the horizontal direction.

Two coupling grooves 312 may be formed in each of the pair of sliding holes 311 .

In addition, coupling protrusions 223 protruding downwardly so as to be fitted into the above-described coupling grooves 312 are formed at both ends of the plate 220 of the arc extinguishing unit 200 .

Two coupling protrusions 223 are formed on each of both ends of the plate 220 .

11 to 13 , the arc extinguishing unit 200 may be vertically slidably inserted into the inner space of the receiving unit 330 through the upper end of the open circuit breaker body 310 .

That is, the locking protrusions 223 formed on both sides of the plate 220 of the arc extinguishing unit 200 are inserted into the corresponding sliding holes 311 .

Then, when the locking protrusions 223 reach a position where the coupling groove 3112 is formed, the arc extinguishing unit 200 may be moved in a horizontal direction by an external force.

Accordingly, each coupling protrusion 223 formed at both ends of the plate 220 may be moved and coupled to the coupling groove 312 at the corresponding position in the horizontal direction.

In addition, the cover part 320 may be coupled to one side of the circuit breaker body part 310 . Since the installation of the cover part 320 is the same as described above, a description thereof will be omitted.

Accordingly, the cover unit 320 closely supports the plurality of arc extinguishing units 200 accommodated in the receiving unit 330 to prevent flow from occurring while the coupling protrusions 223 are fitted in the coupling groove 312 . can

By the above configuration and action, the arc extinguishing unit 200 is slidably inserted into the receiving unit 330 in the vertical direction, and the coupling protrusion 223 is bound to the coupling groove 312 to be coupled, so that the flow along the horizontal direction is reduced. effectively prevented.

In addition, the arc extinguishing unit 200 can effectively prevent upward flow during extinguishing, and further prevent external departure.

As mentioned above, although specific embodiments regarding the air circuit breaker of the present invention have been described, it is apparent that various implementation modifications are possible within the limits that do not depart from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the described embodiments, and should be defined by the claims and equivalents as well as the claims to be described later.

That is, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive, and the scope of the present invention is indicated by the claims to be described later rather than the detailed description, and the meaning and scope of the claims; All changes or modifications derived from the concept of equivalents thereof should be construed as being included in the scope of the present invention.

110: circuit breaker body part
111: sliding hole
120: cover part
130: receiving part
200: Sohobu
210: fire extinguisher body
220: plate
221, 223: coupling projections
222: sliding projection

Claims (9)

circuit breaker body;
a receiving unit formed in the circuit breaker body and having a space in which the arc extinguishing unit is accommodated; and
A sliding coupling part formed in the receiving part and having a pair of sliding holes and a coupling groove formed in a direction different from the sliding hole at a predetermined position of the pair of sliding holes,
The sliding coupling unit guides the arc extinguishing unit to be coupled by sliding in a direction different from the sliding insertion direction at a predetermined position while the arc extinguishing unit is slidably inserted into the inner space of the receiving unit,
The circuit breaker body portion includes a cover portion,
The cover part is coupled to one side of the circuit breaker body so as to closely support the arc extinguishing part accommodated in the receiving part,
A fixing member protruding to one side is formed in the cover part,
The fixing member enters between the ceiling surface of the sliding hole and the arc extinguishing unit, and the air circuit breaker, characterized in that it supports the ceiling surface of the sliding hole and the arc extinguishing unit.
The method of claim 1,
The sliding coupling portion,
and the pair of sliding holes formed on both side walls of the space,
The pair of sliding holes, air circuit breaker, characterized in that both ends of the plate formed on the upper end of the arc extinguishing unit is slidingly inserted and coupled.
3. The method of claim 2,
One side of the circuit breaker body is opened,
The pair of sliding holes, Air circuit breaker, characterized in that formed along the horizontal direction so as to be parallel to the bottom surface of the circuit breaker body.
4. The method of claim 3,
The coupling groove forming a predetermined depth downward is formed in the pair of sliding holes,
Air circuit breaker, characterized in that the plate, the coupling projection fitted to the coupling groove is formed.
delete delete 3. The method of claim 2,
The upper portion of the circuit breaker body is opened,
The pair of sliding holes are formed on both side walls of the space,
The pair of sliding holes are formed along a vertical direction to be perpendicular to the bottom surface of the circuit breaker body,
Air circuit breaker, characterized in that the sliding protrusion is formed on both sides of the plate of the arc extinguishing unit, slidingly inserted into and coupled to the pair of sliding holes along the vertical direction.
8. The method of claim 7,
The coupling groove forming a predetermined depth downward is formed in the pair of sliding holes,
Air circuit breaker, characterized in that the plate, the coupling projection fitted to the coupling groove is formed.
9. The method of claim 8,
One side of the circuit breaker body part is opened so that the receiving part is opened,
A separate cover is further coupled to the upper end of the circuit breaker main body portion, air circuit breaker, characterized in that to regulate the upper end of the extinguishing unit.

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