Arc quenching assembly and circuit breaker having the same

Abstract

The present invention relates to an arc-extinguishing assembly including a sealing member that is elastically deformed by being pressurized between a joint surface of the arc-extinguishing assembly and a circuit breaker, whereby a gap between the joint surface of the arc-extinguishing assembly and the circuit breaker is closed, as a result of which an amount of temporary pressure rise inside the circuit breaker at the time of arc generation is increased, so that the arc can smoothly extend.

Description

Technical Field

[0001] The present invention relates to an arc-extinguishing assembly and a circuit breaker having the same, and more particularly, to an arc-extinguishing assembly having a sealing member and a circuit breaker having the same. Background Technology

[0002] A circuit breaker is a device that interrupts current in the event of abnormal current such as leakage, short circuit, or overcurrent in a circuit. This prevents accidents that may occur in the circuit or in electronic equipment connected to the circuit. A circuit breaker is configured to be energized at a specific point in the circuit, allowing current to flow through it.

[0003] Existing circuit breakers are equipped with fixed contacts and movable contacts that are accessible or separable from the fixed contacts.

[0004] When a normal current is flowing, the movable contact makes contact with the fixed contact. If the movable and fixed contacts are in contact and energized, the circuit is electrically connected.

[0005] In the event of an abnormal current, the movable contact separates from the fixed contact. If the movable and fixed contacts separate, the current in the circuit is interrupted.

[0006] When the movable contact separates from the fixed contact, vapor of metal is generated as a portion of the fixed or movable contact melts and evaporates. The current flowing through the movable and fixed contacts is converted into an electric arc carrying the vapor of the metal, and the arc extends into an arc shape as the movable contact moves away from the fixed contact.

[0007] The electric arc is a flow of plasma composed of electrons and ions at high temperature and high pressure.

[0008] The generated electric arc is cooled and discharged to the outside of the arc-extinguishing assembly after undergoing an arc-extinguishing process within the assembly.

[0009] Below, refer to Figures 1 to 2 The arc extinguishing process in existing circuit breakers will be explained.

[0010] Reference Figure 1 The diagram shows an arc-extinguishing assembly 1000 for extinguishing the generated electric arc.

[0011] The arc-extinguishing assembly 1000 is positioned above the fixed contact (not shown) and extinguishes any generated arc.

[0012] The arc extinguishing assembly 1000 is provided with a plurality of grid members 1300 stacked apart from each other in a direction away from the fixed contact (not shown), and an exhaust section 1100 for discharging the extinguished electric arc is formed on the upper side of the plurality of grid members 1300.

[0013] Downward-extending portions are formed on the left and right sides of the grid member 1300, and the ends of each of the extended portions are inserted into and accommodated in the arc guide member 1500.

[0014] Since the end of the extended portion is surrounded by the arc guide 1500, the generated arc moves toward the end of the extended portion, thereby suppressing the decrease in arc extinguishing efficiency.

[0015] Reference Figure 2 The electric arc extends through multiple grid elements 1300 and the arc flow channel 1400 and is extinguished.

[0016] If the movable contact (not shown) on the lower side of the arc-extinguishing assembly 1000 separates from the fixed contact (not shown), an electric arc is generated as described above. The generated electric arc extends along the movable contact.

[0017] Specifically, due to the generation of metallic gas between the movable and fixed contacts, the pressure inside the circuit breaker increases instantaneously, and the arc extends towards the grid 1300 and the arc flow channel 1400 due to the pressure difference.

[0018] The extended arc reaches multiple grid members 1300 and flow channels 1400, and the arriving arc flows upward along the grid members 1300 and flow channels 1400.

[0019] As the arc extends, its voltage rises, and after being cooled, it is discharged to the outside of the circuit breaker.

[0020] If the arc extinguishing assembly 1000 is inserted into the circuit breaker, a gap is created between the vent 1100 and the circuit breaker.

[0021] In this situation, fluid inside the circuit breaker may leak from the gap when an electric arc is generated. As a result, there is a problem that sufficient pressure cannot be generated to push the arc upwards when an electric arc is generated.

[0022] As a result, the arc cannot extend sufficiently, leading to a decrease in arc extinguishing performance. Therefore, the circuit breaker's structure may be damaged by the arc. Summary of the Invention

[0023] The problem that the invention aims to solve

[0024] The purpose of this invention is to provide an arc-extinguishing assembly with a structure capable of solving the above-mentioned problems, and a circuit breaker having the same.

[0025] Another objective of this invention is to provide an arc-extinguishing assembly capable of increasing the temporary pressure rise inside the circuit breaker when an electric arc is generated, and a circuit breaker having the same.

[0026] Furthermore, the present invention aims to provide an arc-extinguishing assembly capable of suppressing fluid leakage between the circuit breaker and the arc-extinguishing assembly when an electric arc is generated, and a circuit breaker having the same.

[0027] In addition, the present invention aims to provide a circuit breaker with a structure capable of sealing the gap between the circuit breaker and the arc-extinguishing assembly when an electric arc is generated.

[0028] In addition, the present invention aims to provide an arc extinguishing assembly with a structure that can improve arc extinguishing performance when an electric arc is generated, and a circuit breaker having the same.

[0029] Technical solutions to the problem

[0030] To achieve the above objectives, the present invention provides an arc-extinguishing assembly comprising: an exhaust portion inserted into a receiving space having an open portion on one side, covering the open portion; and plate-shaped side portions joined to the two sides of the exhaust portion on the inner side of the receiving space, the side portions being spaced apart from each other by a predetermined distance and facing each other.

[0031] Additionally, the exhaust portion includes: an exhaust body, whose two sides are joined to the side portion in a first direction, and a receiving portion is formed through the central portion, and a mounting portion is provided that protrudes from both sides in a second direction intersecting the first direction; an exhaust cover, which is joined to one side of the exhaust body and covers the receiving portion; and a sealing member, which is joined to the exhaust body.

[0032] In addition, in the second direction, mounting spaces for mounting the mounting portion are formed on both sides of the open portion.

[0033] Additionally, the sealing member includes: a first sealing portion located between the mounting portion and the mounting space, extending a predetermined length along the first direction; a second sealing portion located between the exhaust cover and the exhaust body, extending a predetermined length along the second direction on both sides of the exhaust body in the first direction; and a third sealing portion located between the mounting portion and the mounting space, connecting the two ends of the first sealing portion and the two ends of the second sealing portion.

[0034] In addition, the sealing member is formed of an elastic member.

[0035] In addition, the arc extinguishing assembly also includes an arc extinguishing assembly fastening member, which penetrates the exhaust cover and the mounting portion. One end of the fastening member is fastened in the mounting space, and the sealing member is elastically deformed by the fastening force of the arc extinguishing assembly fastening member.

[0036] Additionally, the second sealing portion includes: a second bottom extending a predetermined length along the second direction; and a wing protruding from the second bottom in a direction away from the receiving portion and extending a predetermined length along the second direction.

[0037] In addition, in the first direction, the length of the exhaust cover is greater than the length of the exhaust body.

[0038] In addition, in the first direction, cover mounting grooves for mounting the vent cover on both sides are formed on both sides of the open portion, and the wing is located between the cover mounting grooves and the two sides of the vent cover.

[0039] In addition, the wing is pressurized and elastically deformed between one side of the cover mounting groove and the two sides of the exhaust cover.

[0040] Additionally, a wing receiving groove with a specified depth is formed in a portion of the exhaust cover facing the cover mounting groove.

[0041] In addition, the thickness of the wing is greater than the distance between one side of the cover mounting groove and the exhaust cover.

[0042] Additionally, in a portion of the mounting part facing the mounting space, a first sealing part insertion groove and a third sealing part insertion groove are recessed, with the first sealing part inserted into the first sealing part insertion groove and the third sealing part inserted into the third sealing part insertion groove.

[0043] In addition, the first sealing part is pressurized and elastically deformed between one side of the installation space and the first sealing part insertion groove, and the third sealing part is pressurized and elastically deformed between the other side of the installation space and the third sealing part insertion groove.

[0044] In addition, the thickness of the first sealing part is greater than the distance between one side of the mounting space and the insertion groove of the first sealing part, and the thickness of the third sealing part is greater than the distance between the other side of the mounting space and the insertion groove of the third sealing part.

[0045] In addition, the second sealing part includes a hook insertion part that extends a predetermined length from the second bottom toward the receiving part and then protrudes a predetermined length toward the exhaust body.

[0046] In addition, an insertion groove of a predetermined depth is provided on one side of the exhaust body facing the hook insertion part, and the hook insertion part is accommodated in the insertion groove.

[0047] Additionally, a second protrusion is provided on a portion of the second bottom, which is the opposite side to the side facing the exhaust cover.

[0048] In addition, in the first sealing portion, the first protrusion extends a predetermined length in the direction of protrusion of the mounting portion, and a portion of the mounting portion has a predetermined space recessed on one side facing the first protrusion, into which the first protrusion is inserted.

[0049] In addition, to achieve the above objectives, the present invention provides a circuit breaker comprising: a circuit breaker body having an inner side having an open receiving space; and an arc extinguishing assembly inserted into the receiving space and having an exhaust portion covering the open portion of the receiving space.

[0050] Additionally, the exhaust portion includes: an exhaust body, a receiving portion formed through the center, and mounting portions protruding from both sides; an exhaust cover, which is attached to one side of the exhaust body and covers the receiving portion; and a sealing member, which is attached to the exhaust body.

[0051] In addition, in the first direction in which the mounting part protrudes, mounting spaces for mounting the mounting part are respectively provided on both sides of the open portion of the receiving space.

[0052] In addition, the installation space is provided with a first mating surface facing the installation part and third mating surfaces on both sides of the first mating surface facing the installation part.

[0053] In addition, in a second direction intersecting the first direction, second mating surfaces supporting the two sides of the exhaust cover are formed on both sides of the open portion of the accommodating space.

[0054] Additionally, the sealing member includes: a first sealing portion located between the mounting portion and the first mating surface; a second sealing portion located on both sides in the second direction between the exhaust cover and the exhaust body; and a third sealing portion located between the mounting portion and the third mating surface, connecting the two ends of the first sealing portion and the two ends of the second sealing portion.

[0055] Additionally, the second sealing portion includes: a second bottom portion located on both sides in the second direction, between the exhaust cap and the exhaust body; and a wing portion protruding from the second bottom portion in a direction away from the receiving portion.

[0056] Additionally, the wing is located between the second mating surface and the two sides of the exhaust cover.

[0057] In addition, the wing is pressurized and elastically deformed between the second mating surface and the two sides of the exhaust cover.

[0058] Additionally, a wing-receiving groove of a specified depth is formed in a portion of the exhaust cover facing the second mating surface.

[0059] Invention Effects

[0060] According to the present invention, the following effects are achieved.

[0061] First, a sealing member is installed in the gap between the arc-extinguishing assembly and the circuit breaker. This prevents fluid leakage from inside the circuit breaker through the gap between the arc-extinguishing assembly and the circuit breaker.

[0062] As a result, when an electric arc is generated, the temporary pressure rise inside the circuit breaker can be increased, the arc extension length can be increased, and thus the arc voltage can be further increased.

[0063] In addition, it can improve arc extinguishing capability, thereby preventing the circuit breaker from being damaged by the arc when it is generated.

[0064] In addition, the sealing member is elastically deformed by the clamping force of the arc-extinguishing assembly and the circuit breaker. The elastically deformed sealing member applies pressure to the mating surfaces between the arc-extinguishing assembly and the circuit breaker.

[0065] If the tightening force between the arc-extinguishing assembly and the circuit breaker is increased, the elastic deformation of the sealing member will increase. If the elastic deformation of the sealing member increases, the sealing member will exert stronger pressure on the mating surfaces between the arc-extinguishing assembly and the circuit breaker.

[0066] That is, as the fastening force of the arc-extinguishing assembly and the circuit breaker increases, the sealing force between the arc-extinguishing assembly and the circuit breaker can be improved. Attached Figure Description

[0067] Figure 1 This is a three-dimensional diagram showing an existing arc-extinguishing assembly.

[0068] Figure 2 It shows the electric arc in Figure 1 A three-dimensional cross-sectional view of the path extending within the arc-extinguishing assembly.

[0069] Figure 3 This is an exploded perspective view of a circuit breaker according to an embodiment of the present invention.

[0070] Figure 4 yes Figure 3 An exploded three-dimensional view of the arc-extinguishing assembly.

[0071] Figure 5 yes Figure 4 An exploded perspective view of the exhaust section.

[0072] Figure 6 yes Figure 5 Top view and perspective view of the exhaust body.

[0073] Figure 7 yes Figure 5 Bottom view and perspective view of the exhaust body.

[0074] Figure 8 yes Figure 5 A three-dimensional view of the sealing component.

[0075] Figure 9 yes Figure 5 Front and side views of the sealing component.

[0076] Figure 10 This is a perspective view of a circuit breaker according to an embodiment of the present invention.

[0077] Figure 11 It is Figure 10 A cross-sectional view of the circuit breaker cut along line XI-XI.

[0078] Figure 12 It is Figure 11 An enlarged cross-sectional view of region A.

[0079] Figure 13 It is Figure 10 A cross-sectional view of the circuit breaker cut along line XIII-XIII.

[0080] Figure 14 It is Figure 13 An enlarged sectional view of region B.

[0081] Figure 15 It is Figure 10 A cross-sectional view of the circuit breaker cut along the XV-XV line.

[0082] Figure 16 It is Figure 15 An enlarged sectional view of region C.

[0083] Explanation of reference numerals in the attached figures

[0084] 1: Circuit breaker 2: Circuit breaker body

[0085] 2a: Accommodation space; 2b1: First mating surface

[0086] 2b2: Second mating surface; 2b3: Third mating surface

[0087] 2c: Installation space mating groove; 2d: Installation space

[0088] 2e: Cover mounting slot; 3: Arc extinguishing assembly

[0089] 4: Arc-extinguishing assembly fastening components; 10: Exhaust section

[0090] 20: Side panel 21: Clip fastening hole

[0091] 22: Grid component fastening hole; 23: Arc flow channel fastening hole

[0092] 30: Grid component; 31: Main body of the grid component

[0093] 32: Grid fastening protrusion; 40: Arc flow channel

[0094] 41: Main body of the electric arc flow channel; 42: Fastening protrusion of the electric arc flow channel

[0095] 100: Exhaust cover; 110: Gas exhaust port

[0096] 120: First cover mating hole; 130: Second cover mating hole

[0097] 140: Wing receiving slot; 200: Filter

[0098] 300: Insulation board; 310: Vent hole

[0099] 400: Exhaust unit 410: Mounting part

[0100] 411: First mounting part mating hole; 412: Second mounting part mating hole

[0101] 413: First sealing part insertion groove; 414: Third sealing part insertion groove

[0102] 420: Frame section; 420a: Receiving section

[0103] 421: Pad portion; 422: Side joint portion

[0104] 423: Side joint space; 424: Buckle protrusion.

[0105] 425: First insertion slot; 426: Second insertion slot

[0106] 500: Sealing component; 510: First sealing part

[0107] 511: First bottom part; 512: First protrusion.

[0108] 520: Second protrusion 521: Hook insertion part

[0109] 522: Second bottom; 522a: Second protrusion

[0110] 523: Wing section; 530: Third sealing section

[0111] 610: Fastening bolt; 620: Fastening nut Detailed Implementation

[0112] The arc-extinguishing assembly and the circuit breaker having the same embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0113] In the following description, descriptions of certain constituent elements may be omitted in order to clearly define the features of the present invention.

[0114] 1. Definition of terms

[0115] The term "circuit breaker" as used below refers to a device connected to a circuit that senses a leakage current, overcurrent, or short circuit in the circuit and, in the event of such a condition, disconnects the current in the circuit. In one embodiment, the circuit breaker may be an air circuit breaker.

[0116] The term "normal current" as used below refers to the current in which the circuit breaker does not trip. Specifically, it includes the current within the circuit breaker's preset current range, the current in which there is no leakage current, or the current in which there is no short circuit.

[0117] The term "abnormal current" as used below refers to the current in which the circuit breaker trips. Specifically, it includes currents exceeding the current range preset by the circuit breaker, currents in the event of leakage, and currents in the event of a short circuit.

[0118] The term "arc" as used below refers to the plasma of electrons and ions generated when movable and fixed contacts separate, which are in a state where they are in contact and generate current.

[0119] The terms "front side," "rear side," "left side," "right side," "upper side," and "lower side" mentioned below can be found in [reference needed]. Figure 1 , Figures 3 to 8 as well as Figure 10 Understanding the coordinate system shown.

[0120] 2. Description of the configuration of circuit breaker 1 according to an embodiment of the present invention

[0121] Below, refer to Figure 3 The configuration of a circuit breaker 1 according to an embodiment of the present invention will be described. In the illustrated embodiment, a portion of the entire arc-extinguishing assembly 3 is omitted.

[0122] Reference Figure 3 The diagram shows a circuit breaker 1 configured to interrupt current when an abnormal current is generated.

[0123] The circuit breaker 1 is provided with a circuit breaker body 2, which has an upwardly opening receiving space 2a inside. An arc-extinguishing assembly 3 is inserted into the receiving space 2a, and the open upper side of the receiving space 2a is covered by the inserted arc-extinguishing assembly 3. The arc-extinguishing assembly 3 is combined with the circuit breaker body 2 around the periphery of the open portion of the receiving space 2a.

[0124] Recessed mounting spaces 2d are formed on the front and rear sides of the open portion of the receiving space 2a, so that the exhaust portion 10 of the arc-extinguishing assembly 3 (see reference) can be used to vent the arc-extinguishing assembly 3. Figure 3 Insert on both sides.

[0125] The two sides of the exhaust section 10, namely the front side and the rear side, are respectively inserted into the mounting space 2d and supported by the first mating surface 2b1 and the third mating surface 2b3. Specifically, the first mating surface 2b1 supports the exhaust section 10 in the vertical direction, and the third mating surface 2b3 supports the exhaust section 10 in the horizontal direction.

[0126] On the left and right sides of the open portion of the accommodating space 2a, groove-shaped cover mounting grooves 2e are formed. The cover mounting grooves 2e are recessed to allow the exhaust cover 100 of the exhaust portion 10 (see reference) to be mounted. Figure 5 Insert on both sides.

[0127] The two sides of the exhaust cover 100, namely the left and right sides, are inserted into the cover mounting groove 2e and supported by the second mating surface 2b2. Specifically, the cover mounting groove 2e supports the exhaust cover 100 in the vertical direction.

[0128] An installation space mating groove 2c is formed in the installation space 2d, which is recessed to allow the arc-extinguishing assembly 3 to engage with the installation space 2d. Specifically, the installation space mating groove 2c is formed in the center of the first mating surface 2b1.

[0129] One end of the arc-extinguishing assembly fastening member 4, which passes through the front and rear sides of the exhaust section 10, is inserted into and engaged with the mounting space engagement groove 2c.

[0130] The exhaust section 10 is joined to the circuit breaker body 2 by the fastening force of the arc-extinguishing assembly fastening member 4 and the mounting space connecting groove 2c. That is, the arc-extinguishing assembly 3 and the circuit breaker body 2 are joined by the fastening force of the arc-extinguishing assembly fastening member 4 and the mounting space connecting groove 2c.

[0131] The accommodating space 2a of the circuit breaker body 2 is provided with a fixed contact (not shown) and a movable contact (not shown) configured to disconnect or connect the power supply side and the load side.

[0132] The fixed contact is connected to the power supply side, and the movable contact is connected to the load side.

[0133] The fixed contact and the movable contact are arranged on the lower side of the arc extinguishing assembly 3.

[0134] When a normal current flows in a circuit, the fixed contact and the movable contact are in contact with each other and are energized, so the current flows between the power supply side and the load side.

[0135] When an abnormal current flows in the circuit, the movable contact rotates by a predetermined angle in the direction of separation from the fixed contact. This separates the fixed and movable contacts, thus disconnecting the current between the power supply side and the load side.

[0136] Since the structure of the movable and fixed contacts for connecting or disconnecting the power supply side and the load side is a known technology, a detailed description of the structure is omitted.

[0137] When the fixed and movable contacts separate due to an abnormal current, an electric arc is generated between them. This arc is a high-temperature plasma of electrons and ions; if it is not extinguished quickly, the structure of the circuit breaker may be damaged. Therefore, it is preferable that the arc generated between the fixed and movable contacts is adequately extinguished by an arc-extinguishing assembly 3 located above the fixed and movable contacts.

[0138] The arc moves upward and is inside the arc-extinguishing assembly 3, where the grid element 30 (see reference) is located. Figure 4 ) and arc flow channel 40 (refer to) Figure 4 The arc extends and is then discharged to the outside of the circuit breaker 1 through the central portion of the exhaust section 10. When an arc is generated, the pressure inside the containment space 2a temporarily increases due to the metallic gas generated between the fixed and movable contacts. In order to fully push the arc upward and extend it, a sufficient amount of temporary pressure increase inside the containment space 2a needs to be formed before the arc is discharged through the central portion of the exhaust section 10.

[0139] If fluid inside the containment space 2a leaks from the gap between the exhaust section 10 and the mating surfaces 2b1, 2b2, 2b3, the temporary pressure increase inside the containment space 2a may be insufficient when an electric arc is generated. Therefore, the arc may not be able to be sufficiently pushed upwards, resulting in a shorter arc extension length.

[0140] Considering this problem, a structure is needed to improve arc-extinguishing performance by increasing the force pushing the arc upwards. That is, a structure is needed to suppress leakage of fluid inside the containment space 2a between the exhaust section 10 and the mating surfaces 2b1, 2b2, 2b3. In other words, a structure is needed to seal the gap between the exhaust section 10 and the mating surfaces 2b1, 2b2, 2b3.

[0141] An arc-extinguishing assembly 3 according to one embodiment of the present invention is provided with a sealing member 500 for sealing the gap between the exhaust section 10 and the mating surfaces 2b1, 2b2, 2b3, which will be described in detail later.

[0142] 3. Description of the arc-quenching assembly 3 according to an embodiment of the present invention

[0143] Reference Figure 4 The arc extinguishing assembly 3 includes an exhaust section 10, a side section 20, a grid section 30, and an arc flow channel 40.

[0144] A pair of plate-shaped side portions 20 are joined on the left and right sides of the exhaust section 10, and a grid member 30 and an electric arc flow channel 40 are joined between the plate-shaped side portions 20.

[0145] The electric arc generated on the lower side of the arc extinguishing assembly 3 extends through the grid 30 and the arc flow channel 40, and is then discharged to the outside of the circuit breaker 1 through the exhaust section 10.

[0146] The components will now be explained. However, the exhaust section 10 will be explained briefly, and a more detailed explanation will follow in another section.

[0147] (1) Explanation of exhaust section 10

[0148] First, the exhaust section 10 will be explained.

[0149] The exhaust section 10 is generally quadrilateral in shape. The exhaust section 10 includes an exhaust body 400 and an exhaust cover 100 that covers the upper side of the exhaust body 400.

[0150] In one embodiment, the exhaust cover 100 can be formed to a size that completely covers the upper side of the exhaust body 400. That is, the area of ​​the exhaust cover 100 can be larger than the area of ​​the exhaust body 400.

[0151] A gas outlet 110 capable of venting an electric arc is formed through the central portion of the exhaust cover 100. In one embodiment, a plurality of gas outlets 110 may be formed.

[0152] On both sides (left and right sides) of the exhaust body 400, there are snap-fit ​​protrusions 424 for engaging with the side portions 20. A pair of side portions 20 are engaged on the left and right sides of the exhaust body 400 respectively.

[0153] (2) Explanation of side part 20

[0154] The side portion 20 will now be described.

[0155] A pair of side portions 20 are provided and are formed in the shape of plates. The side portions 20 are located facing each other, and the grid member 30 and the arc flow channel 40, described later, are disposed between the side portions 20 and are combined with the side portions 20.

[0156] A plurality of grid member fastening holes 22 and arc flow channel fastening holes 23 are formed through the center of the side portion 20. The grid member fastening protrusion 32 and the arc flow channel fastening protrusion 42, described later, are respectively inserted into the grid member fastening holes 22 and the arc flow channel fastening holes 23.

[0157] Here, the dimensions of the grid fastening hole 22 and the arc flow channel fastening hole 23 correspond to or are slightly smaller than the dimensions of the grid fastening protrusion 32 and the arc flow channel fastening protrusion 42. Therefore, the grid fastening protrusion 32 and the arc flow channel fastening protrusion 42 can be pressed into the grid fastening hole 22 and the arc flow channel fastening hole 23, and the side portion 20 can be combined with the grid 30 and the arc flow channel 40.

[0158] In the illustrated embodiment, the grid fastening hole 22 and the arc flow channel fastening hole 23 are formed as quadrilaterals, or their shapes may vary depending on the shapes of the grid fastening protrusion 32 and the arc flow channel fastening protrusion 42.

[0159] The exhaust section 10 is joined to the side section 20 on the upper side of the side section 20.

[0160] A snap-fit ​​hole 21 for engaging with the exhaust section 10 is formed through the upper side of the side portion 20.

[0161] A pair of side portions 20 slide toward the left and right sides of the exhaust portion 10 in order to engage with the exhaust portion 10. If the side portions 20 move, the snap-fit ​​protrusions 424 protruding from the left and right sides of the exhaust portion body 400 are inserted into and engaged with the snap-fit ​​fastening holes 21.

[0162] Here, the latching protrusion 424 is formed obliquely along the insertion direction of the side portion 20. As a result, the latching protrusion 424 can be easily inserted into the latching fastening hole 21. In addition, when the latching protrusion 424 is inserted into the latching fastening hole 21, the side portion 20 will not move arbitrarily to the lower side of the exhaust body 400.

[0163] In the illustrated embodiment, the snap fastening hole 21 is formed as a quadrilateral, but this can vary depending on the shape of the snap protrusion 424.

[0164] (3) Explanation of grid component 30 and arc flow channel 40

[0165] Next, the grid element 30 will be described.

[0166] The grid member 30 is formed in the shape of a plate, and a plurality of them are stacked at a predetermined distance from the front side to the rear side. The grid member 30 includes a grid member main body 31 and grid member fastening protrusions 32 formed from both sides of the grid member main body 31.

[0167] The grid member fastening protrusions 32 protruding to both sides are inserted into the grid member fastening holes 22, thereby fixing the grid member 30 between a pair of side portions 20.

[0168] The grid element 30 can be formed of any material capable of exerting electromagnetic attraction on the electric arc. In one embodiment, the grid element 30 can be formed of iron (Fe).

[0169] The electric arc extends and moves between a plurality of grid members 30. As a result, the arc voltage increases, and the arc is cooled.

[0170] Next, the arc flow channel 40 will be described.

[0171] The arc flow channel 40 is formed in the shape of a plate and is located at a predetermined distance rearward from the plurality of grid members 30.

[0172] The electric arc extends to the lower end of the arc flow channel 40 and flows along the arc flow channel 40. If the electric arc cannot reach the arc flow channel 40, the arc extinguishing performance may decrease. Considering this, it is preferable to shorten the distance between the location where the electric arc occurs and the arc flow channel 40.

[0173] Therefore, the lower end of the arc flow channel 40 is bent towards the front.

[0174] The arc flow channel 40 can be formed of any material capable of exerting electromagnetic attraction on the arc. In one embodiment, the arc flow channel can be formed of iron (Fe) material.

[0175] 4. Description of the configuration of the exhaust section 10 according to an embodiment of the present invention

[0176] Next, refer to Figures 5 to 9 The structure of the exhaust section 10 will be explained.

[0177] The exhaust section 10 includes an exhaust cover 100, a filter 200, an insulating plate 300, and an exhaust body 400. A sealing member 500 for sealing the gap between the exhaust section 10 and the circuit breaker 1 is provided in the exhaust body 400.

[0178] (1) Explanation of exhaust cover 100

[0179] The exhaust cover 100 is plate-shaped. The exhaust cover 100 is attached to and covers the upper side of the exhaust body 400.

[0180] A gas outlet 110 for discharging extinguished electric arc is formed through the center of the exhaust cover 100. In one embodiment, a plurality of gas outlets 110 may be formed.

[0181] On both sides of the exhaust cover 100, a first cover engagement hole 120 and a second cover engagement hole 130 are formed for engaging with the exhaust body 400. In the illustrated embodiment, the first cover engagement hole 120 and the second cover engagement hole 130 are formed on the front and rear sides of the exhaust cover 100.

[0182] In the illustrated embodiment, the first cover engagement hole 120 is formed at the center of the front and rear sides of the exhaust cover 100, respectively. That is, there can be two first cover engagement holes 120.

[0183] In the illustrated embodiment, the second cover engagement holes 130 are formed at various corners of the vent cover 100. That is, there may be four second cover engagement holes 130.

[0184] (2) Explanation of filter 200 and insulating plate 300

[0185] The filter 200 is inserted into and accommodated in a receiving portion 420a formed through the center of the exhaust body 400. A pad portion 421 is formed protruding from the front and rear sides of the receiving portion 420a, and the pad portion 421 supports the inserted filter 200.

[0186] In one embodiment, the filter 200 may be made of a porous material with internally formed porous structures that allow fluid to pass through. Alternatively, the filter 200 may be formed by stacking a plurality of plates with internally formed porous structures that allow fluid to pass through.

[0187] The filter 200 housed in the housing 420a is covered by the exhaust cover 100. When an electric arc is generated, the fluid in the housing 2a passes through the filter 200 and is discharged to the outside of the circuit breaker 1 via the gas outlet 110.

[0188] The insulating plate 300 is a plate-shaped member through which a plurality of vent holes 310 are formed. The insulating plate 300 is inserted and fixed to the receiving portion 420a from the underside of the pad portion 421.

[0189] In one embodiment, the insulating plate 300 can be formed by stacking a plurality of insulating plate-shaped members. In the exhaust section 10, the insulating plate 300, the filter 200, and the exhaust cover 100 are arranged sequentially from bottom to top. Thus, the extinguished electric arc is discharged to the outside of the circuit breaker 1 through the exhaust port 310, the perforations of the filter 200, and the gas outlet 110.

[0190] (3) Explanation of the exhaust body 400

[0191] Next, refer to Figure 6 and Figure 7 The exhaust body 400 will be described.

[0192] Reference Figure 6 The diagram shows a top view and a perspective view of the upper side of the exhaust body 400. (Refer to...) Figure 7 The diagram shows a bottom view and a perspective view of the lower side of the exhaust body 400.

[0193] The exhaust body 400 includes: a frame portion 420, with a receiving portion 420a formed through the center; and a mounting portion 410 protruding from both sides of the frame portion 420. In one embodiment, the exhaust body 400 may be in the shape of a generally quadrilateral ring.

[0194] The mounting portion 410 protrudes from the front and rear sides of the frame portion 420 and is inserted into the mounting space 2d of the circuit breaker body portion 2, respectively. The inserted mounting portion 410 is supported by the first mating surface 2b1 and the third mating surface 2b3 of the mounting space 2d.

[0195] In one embodiment, the mounting portion 410 may be formed with dimensions corresponding to the mounting space 2d. To suppress leakage of fluid from the receiving space 2a between the mounting portion 410 and the mounting space 2d, it is preferable that the mounting portion 410 is formed with dimensions similar to those of the mounting space 2d.

[0196] A first mounting part engagement hole 411 is formed through the center of the mounting part 410. When the mounting part 410 is inserted into the mounting space 2d, the arc extinguishing assembly fastening member 4 passes through the first cover engagement hole 120 and the first mounting part engagement hole 411 in sequence.

[0197] One end of the through-type arc-extinguishing assembly fastening member 4 is inserted into the mounting space mating groove 2c. As a result, the exhaust cover 100 and the exhaust body 400 are pressed into the mounting space mating groove 2c by the arc-extinguishing assembly fastening member 4.

[0198] That is, the exhaust section 10 is connected to the circuit breaker body section 2 by the fastening force of the arc extinguishing assembly fastening member 4 and the mounting space connecting groove 2c.

[0199] Second mounting engagement holes 412 are formed through the left and right sides of the mounting portion 410 for engaging with the exhaust cover 100. The lower end of the second mounting engagement hole 412 is formed into a quadrangular prism-shaped space.

[0200] The fastening nut 620 is inserted into the lower end of the second mounting part engagement hole 412, and one end of the fastening bolt 610, which passes through the second cover engagement hole 130 and the second mounting part engagement hole 412, is fastened to the fastening nut 620. Thus, the exhaust cover 100 and the exhaust body 400 are pressurized against each other by the fastening bolt 610 and the fastening nut 620. This securely fastens the exhaust body 400 and the exhaust cover 100.

[0201] In a portion of the lower side of the mounting portion 410 that connects to the frame portion 420 (described later), a first sealing portion insertion groove 413 is formed in the shape of a recess, so that the first sealing portion 510 (described later) can be inserted.

[0202] Additionally, a third sealing insert groove 414 is formed in a portion of the left and right sides of the mounting portion 410 that connects to the frame portion 420 described later, so that the third sealing portion 530 described later can be inserted.

[0203] The first sealing part insertion groove 413 is formed along the entire left and right side length of the mounting part 410 and is connected to the third sealing part insertion groove 414.

[0204] Side joint portions 422 are formed on both sides of the frame portion 420. In one embodiment, the upper side of the side joint portion 422 may be lower than the adjacent frame portion 420 portion. That is, the upper side of the side joint portion 422 may be formed as a step with the upper side of the adjacent frame portion 420.

[0205] The second sealing part 520, described later, is located in the space where the step is formed.

[0206] The side joint portions 422 are respectively formed with recessed groove-shaped side joint spaces 423 to allow the side portion 20 to be inserted. In one embodiment, the side joint space 423 may be formed with a size corresponding to the upper side of the side portion 20.

[0207] Each side portion has a protruding latching protrusion 424 in the space 423. Thus, when the side portion 20 is inserted, the latching protrusion 424 is inserted into the latching fastening hole 21, thereby restricting the side portion 20 from moving arbitrarily up or down.

[0208] A first insertion groove 425 for fixing the second sealing part 520 (described later) is formed on the upper side of the side portion engaging space 423. In one embodiment, the first insertion groove 425 may be formed with a size corresponding to the second protrusion 522a (described later).

[0209] A recessed groove-shaped second insertion groove 426 may be formed in a portion of the upper side surface of the side joint 422 that connects to the portion of the adjacent frame portion 420. That is, a recessed groove-shaped second insertion groove 426 may be formed in a portion of the upper side surface of the side joint 422 that is closest to the receiving space 420a.

[0210] The hook insertion portion 521, described later, is inserted into the second insertion groove 426, which has a predetermined length in the front-to-back direction. In one embodiment, the predetermined length may be a length corresponding to the length of the hook insertion portion 521.

[0211] The second sealing part 520, described later, is inserted between the upper side of the side joint 422 and the exhaust cover 100.

[0212] (4) Explanation of sealing component 500

[0213] Next, refer to Figure 8 and Figure 9 The sealing component 500 is described below.

[0214] Reference Figure 8 A perspective view of the sealing member 500 is shown, with reference to... Figure 9 The front and side views of the sealing member 500 are shown.

[0215] The sealing member 500 is a component that is combined with the exhaust body 400 and seals the gap created between the exhaust section 10 and the circuit breaker body section 2. In one embodiment, the sealing member 500 may be formed of an elastic insulating material. Alternatively, the sealing member 500 may be formed of a material that elastically deforms under applied pressure.

[0216] The sealing member 500 includes a first sealing part 510, a second sealing part 520, and a third sealing part 530.

[0217] The first sealing portion 510 is formed by extending a predetermined distance in one direction, and a pair of them are provided and spaced apart from each other. In the illustrated embodiment, the one direction can be defined as a left-right direction, and the pair of first sealing portions 510 are spaced apart from each other in the front-back direction.

[0218] The second sealing portion 520 is formed by extending a predetermined distance in one direction, and a pair of them are provided and spaced apart from each other. In the illustrated embodiment, the one direction can be defined as a front-back direction, and the pair of second sealing portions 520 are spaced apart from each other in a left-right direction.

[0219] The third sealing portion 530 is formed by extending a predetermined distance in one direction, and connects the two ends of the first sealing portion 510 and the second sealing portion 520 respectively. In the illustrated embodiment, the direction can be defined as a vertical direction, and four third sealing portions 530 can be provided.

[0220] That is, the sealing member 500 can be formed as a quadrilateral ring shape in which a pair of second sealing portions 520 spaced apart from each other in the left-right direction and a pair of first sealing portions 510 spaced apart from each other in the front-back direction are arranged vertically. Each sealing portion 510, 520, 530 functions to seal the gap between the exhaust body 400 and the mounting space 2d, the gap between the exhaust cover 100 and the cover mounting groove 2e, or the gap between the exhaust cover 100 and the exhaust body 400.

[0221] First, the first sealing portion 510 includes a first bottom portion 511 extending a predetermined length in the left-right direction and a first protrusion portion 512 protruding from the first bottom portion 511.

[0222] The first bottom part 511 is inserted into the first sealing part insertion groove 413, and the first protrusion 512 is inserted into the lower space of the second mounting part engagement hole 412.

[0223] In addition, the third sealing part 530 is inserted into the third sealing part insertion groove 414.

[0224] Additionally, the second sealing portion 520 includes: a second bottom portion 522, which is formed by extending a predetermined length in the front-rear direction; a hook insertion portion 521, which protrudes from the second bottom portion 522 toward the receiving portion 420a; and a wing portion 523, which protrudes from the second bottom portion 522 toward the direction away from the receiving portion 420a.

[0225] The hook insertion portion 521 has a cross-section that extends a predetermined length toward the receiving portion 420a and then protrudes downward by a predetermined length. That is, it has a " "A cross-section of a shape, or having " "A cross-section of a shape that flips left and right (see reference)" Figure 9 (a)).

[0226] The downward protruding portion of the hook insertion part 521 is inserted into the second insertion groove 426 of the frame part 420 of the exhaust body 400. As a result, the second sealing part 520 can be more securely fixed between the exhaust cover 100 and the exhaust body 400.

[0227] In addition, the second bottom 522 has a quadrilateral cross section, and a second protrusion 522a protruding downward is formed on the lower side of the second bottom 522.

[0228] The second bottom portion 522 is disposed between the upper side of the side joint portion 422 and the vent cap 100, and the second protrusion 522a is inserted into the first insertion groove 425. In one embodiment, the second protrusion 522a may be formed with a size corresponding to the first insertion groove 425.

[0229] Additionally, the wing 523 is formed by protruding upward from the second bottom 522 in a direction away from the receiving portion 420a. In one embodiment, the wing 523 may be formed to have the same length as the second bottom 522 in the front-rear direction. The wing 523 is inserted between the cover mounting groove 2e and the vent cover 100.

[0230] 5. Description of the sealing structure of the circuit breaker 1 according to an embodiment of the present invention

[0231] Next, refer to Figures 10 to 16 The sealing structure of the circuit breaker 1 in this embodiment will be described.

[0232] Figure 10 The circuit breaker 1 is shown in its state with the arc-extinguishing assembly 3 attached. A portion of the entire arc-extinguishing assembly 3 is omitted in the accompanying drawings.

[0233] Figure 11 A cross-sectional view is shown showing the upper side of circuit breaker 1 cut along line XI-XI in the vertical direction. Figure 11 A sealing structure based on the first sealing part 510 is shown.

[0234] Figure 13 A cross-sectional view is shown showing the upper side of circuit breaker 1 cut along line XIII-XIII in the vertical direction. Figure 13 A sealing structure based on the second sealing part 520 is shown.

[0235] Figure 15 A cross-sectional view is shown, showing the front side of circuit breaker 1 cut along the XV-XV line in the front-back direction. Figure 15 A sealing structure based on the third sealing part 530 is shown.

[0236] (1) Explanation of the sealing structure based on the first sealing part 510

[0237] Reference Figure 11 When the arc-extinguishing assembly 3 and the circuit breaker body 2 are joined, a space (gap) is created between the lower side of the mounting part 410 and the first mating surface 2b1, and the first sealing part 510 is inserted into the space and elastically deformed. This part is illustrated in area A.

[0238] Figure 12 This is an enlarged cross-sectional view of region A. Figure 12 (a) shows a cross-sectional view of region A with the first seal 510 removed. Figure 12(b) shows a cross-sectional view of region A with the first sealing part 510 inserted.

[0239] Reference Figure 12 In (a), even if the exhaust body 400 and the first mating surface 2b1 are pressurized against each other due to strong fastening force, fluid may still leak from between the exhaust body 400 and the first mating surface 2b1 if the internal pressure of the accommodating space 2a increases. In the illustrated embodiment, the possible leakage path of fluid is shown by dashed arrows.

[0240] Reference Figure 12 (b) In order to prevent leakage of this fluid, a first sealing part 510 is provided between the exhaust body 400 and the first mating surface 2b1.

[0241] When the exhaust body 400 is engaged, the first sealing part 510 is pressurized and elastically deformed between the exhaust body 400 and the first engagement surface 2b1.

[0242] In one embodiment, the first sealing portion 510 may be formed to a size that allows it to be pressurized and elastically deformed between the exhaust body 400 and the first mating surface 2b1.

[0243] In one embodiment, the volume of the first bottom 511 may be larger than the volume of the first sealing insertion groove 413.

[0244] In one embodiment, the cross-sectional area of ​​the first bottom 511 may be larger than the cross-sectional area of ​​the first sealing insertion groove 413.

[0245] The elastically deformable first sealing part 510 presses against the lower side of the first mating surface 2b1 and the mounting part 410 and fits tightly against the lower side of the first mating surface 2b1 and the mounting part 410.

[0246] Thus, the gap between the first mating surface 2b1 and the exhaust body 400 is sealed, which can prevent the fluid in the containing space 2a from leaking out from the gap between the first mating surface 2b1 and the exhaust body 400.

[0247] (2) Explanation of the sealing structure based on the second sealing part 520

[0248] Reference Figure 13 When the arc-extinguishing assembly 3 and the circuit breaker body 2 are joined, spaces (gaps) may be created between the upper side of the mounting part 410 and the vent cover 100, and between the second mating surface 2b2 and the lower side of the vent cover 100. The second sealing part 520 is inserted into the space and elastically deformed. This part is illustrated in area B.

[0249] Figure 14 An enlarged cross-sectional view of region B is shown. Figure 14(a) shows a cross-sectional view of region B with the second seal 520 removed. Figure 14 (b) shows a cross-sectional view of region B with the second seal 520 inserted.

[0250] Reference Figure 14 Even if the upper side of the mounting portion 410 and the vent cap 100, the second mating surface 2b2 and the vent cap 100 are pressed against each other with a strong fastening force, fluid may still leak from the gaps between them if the internal pressure of the receiving space 2a increases. In the illustrated embodiment, the possible leakage path of fluid is shown by dashed arrows.

[0251] Reference Figure 14 (b) In order to prevent leakage of this fluid, a second sealing part 520 is provided between the upper side of the mounting part 410 and the exhaust cover 100, and between the second mating surface 2b2 and the lower side of the exhaust cover 100.

[0252] When the exhaust body 400 and the exhaust cover 100 are joined, the second bottom 522 and the hook insertion part 521 are pressurized and elastically deformed between the upper side of the side joint 422 and the lower side of the exhaust cover 100.

[0253] Furthermore, when the exhaust body 400 and the exhaust cover 100 are joined, the second bottom 522 can be pressurized and elastically deformed between the side joint 422 and the inner side of the receiving space 2a facing the side joint 422.

[0254] In one embodiment, the hook insertion portion 521 may be formed to a size that allows it to be pressurized and elastically deformed between the second insertion slot 426 and the vent cap 100.

[0255] In one embodiment, the volume of the downward protruding portion of the hook insertion part 521 may be greater than the volume of the second insertion groove 426.

[0256] In one embodiment, the cross-sectional area of ​​the downward protruding portion of the hook insertion part 521 may be greater than the cross-sectional area of ​​the second insertion groove 426.

[0257] In one embodiment, the second bottom 522 may be formed to a size that can be elastically deformed under pressure between the upper side of the side joint 422 and the lower side of the exhaust cap 100.

[0258] In one embodiment, the second bottom 522 may be formed with dimensions that allow it to be elastically deformed under pressure between the side joint 422 and the inner surface of the receiving space 2a facing the side joint 422.

[0259] The elastically deformable second bottom 522 and hook insertion portion 521 pressurize and fit tightly against the upper side of the side joint 422 and the exhaust cover 100. Thus, the gap between the upper side of the side joint 422 and the exhaust cover 100 is sealed, preventing fluid leakage through the filter 200 from the gap.

[0260] Furthermore, the elastically deformable second bottom 522 presses against the inner surface of the side joint 422 and the receiving space 2a facing the side joint 422, and fits tightly against the inner surface of the side joint 422 and the receiving space 2a facing the side joint 422. As a result, the gap between the side joint 422 and the inner surface of the receiving space 2a facing the side joint 422 is sealed, preventing fluid leakage from the receiving space 2a from the gap.

[0261] When the exhaust body 400 and the exhaust cover 100 are joined, the wing 523 is pressurized and elastically deformed between the cover mounting groove 2e and the exhaust cover 100.

[0262] In one embodiment, a wing receiving groove 140 with a recessed groove shape of a predetermined depth is formed in a portion of the exhaust cover 100 facing the cover mounting groove 2e.

[0263] In one embodiment, the wing 523 may be formed to a size that allows it to be pressurized and elastically deformed between the cover mounting groove 2e and the exhaust cover 100.

[0264] In one embodiment, the vertical thickness of the wing 523 can be greater than the distance between the cover mounting groove 2e and the exhaust cover 100.

[0265] In one embodiment, the volume of the wing 523 may be greater than the size of the space between the cover mounting groove 2e and the exhaust cover 100.

[0266] In one embodiment, the cross-sectional area of ​​the wing 523 may be greater than the area between the cover mounting groove 2e and the exhaust cover 100.

[0267] The elastically deformable wing 523 presses against the second mating surface 2b2 of the cover mounting groove 2e and the lower side surface of the exhaust cover 100, and comes into close contact with the second mating surface 2b2 and the lower side surface of the exhaust cover 100. As a result, the gap between the second mating surface 2b2 and the lower side surface of the exhaust cover 100 is sealed, which can prevent fluid inside the receiving space 2a from leaking out of the gap.

[0268] (3) Explanation of the sealing structure based on the third sealing part 530

[0269] Reference Figure 15When the arc-extinguishing assembly 3 and the circuit breaker body 2 are joined, a space (gap) is created between the left and right sides of the mounting part 410 and the third mating surface 2b3. The third sealing part 530 is inserted into the space and elastically deforms. This part is illustrated in area C.

[0270] Figure 16 A magnified cross-sectional view of region C is shown. Figure 16 (a) shows a cross-sectional view of region C with the third seal 530 removed. Figure 16 (b) shows a cross-sectional view of region C with the third seal 530 inserted.

[0271] Reference Figure 16 In embodiment (a), even if the exhaust body 400 and the third mating surface 2b1 are pressurized against each other due to a strong fastening force, fluid may still leak between the exhaust body 400 and the third mating surface 2b3 due to increased internal pressure in the containment space 2a. In the illustrated embodiment, the possible leakage path is shown by dashed arrows.

[0272] Reference Figure 16 (b) In order to prevent leakage of this fluid, a third sealing part 530 is provided between the mounting part 410 and the third mating surface 2b3.

[0273] When the exhaust body 400 is assembled, the third sealing part 530 is pressurized and elastically deformed between the third mating surface 2b3 and the left and right sides of the mounting part 410.

[0274] In one embodiment, the third sealing portion 530 may be formed to a size that allows it to be pressurized and elastically deformed between the exhaust body 400 and the third mating surface 2b3.

[0275] In one embodiment, the volume of the third sealing part 530 may be larger than the volume of the third sealing part insertion groove 414.

[0276] In one embodiment, the cross-sectional area of ​​the third sealing portion 530 may be larger than the cross-sectional area of ​​the third sealing portion insertion groove 414.

[0277] The elastically deformable third sealing part 530 presses against the left and right sides of the third mating surface 2b3 and the mounting part 410 and fits tightly against the left and right sides of the third mating surface 2b3 and the mounting part 410.

[0278] Thus, the gap between the third mating surface 2b3 and the exhaust body 400 is sealed, which can prevent the fluid in the containing space 2a from leaking out from the gap between the third mating surface 2b3 and the exhaust body 400.

[0279] 6. The effect of the sealing structure of the circuit breaker 1 according to an embodiment of the present invention

[0280] As described above, a sealing member 500 is provided in the gap between the arc extinguishing assembly 3 and the circuit breaker body 2 in this embodiment.

[0281] The sealing member 500 is pressurized and elastically deformed by the fastening force between the arc-extinguishing assembly 3 and the circuit breaker body 2. The elastically deformed sealing member 500 pressurizes both the arc-extinguishing assembly 3 and the circuit breaker body 2, thereby sealing the gap between them.

[0282] This prevents fluid leakage inside the containment space 2a through the gap between the arc-extinguishing assembly 3 and the circuit breaker body 2. As a result, it increases the temporary pressure rise inside the containment space 2a when an electric arc is generated.

[0283] Furthermore, it can increase the arc extension length, thereby allowing the arc voltage to rise further. As a result, it can improve the arc extinguishing capability, thus preventing damage to the circuit breaker 1 due to the arc when it is generated.

[0284] In addition, the sealing component undergoes elastic deformation due to the tightening force of the arc-extinguishing assembly and the circuit breaker. That is, if the tightening force of the arc-extinguishing assembly and the circuit breaker is increased, the amount of elastic deformation of the sealing component will increase.

[0285] If the elastic deformation of the sealing member increases, the sealing member will exert more pressure on the arc-extinguishing assembly 3 and the circuit breaker body 2. That is, the sealing force between the arc-extinguishing assembly 3 and the circuit breaker body 2 can be increased by increasing the fastening force between them.

[0286] The above description refers to preferred embodiments of the present invention. However, those skilled in the art will understand that various modifications and alterations can be made to the present invention without departing from the spirit and scope of the invention as set forth in the claims.

[0287] Industrial applicability

[0288] This invention relates to an arc-extinguishing assembly and a circuit breaker having the same, and is industrially applicable because it can provide an arc-extinguishing assembly with a sealing member and a circuit breaker having the same.

Claims

1. An arc-extinguishing assembly, wherein, include: An exhaust section is inserted into a receiving space that has an opening on one side, and covers the opening. as well as The plate-shaped side portions are respectively attached to the two sides of the exhaust portion inside the receiving space, and the side portions are spaced apart from each other and face each other; The exhaust section includes: The exhaust body has two sides that are joined to the side portion in a first direction, and is provided with a receiving portion that penetrates the central portion, and is provided with a mounting portion that protrudes from both sides in a second direction that intersects with the first direction; An exhaust cap, which is attached to one side of the exhaust body, covers the receiving portion; and The sealing component is combined with the exhaust body; In the second direction, mounting spaces for mounting the mounting portion are respectively provided on both sides of the open portion; The sealing component includes: A first sealing portion is located between the mounting portion and the mounting space, and extends a predetermined length along the first direction; A second sealing portion, located between the exhaust cover and the exhaust body, extends a predetermined length along the second direction on both sides of the exhaust body in the first direction; and The third sealing part is located between the mounting part and the mounting space, and connects the two ends of the first sealing part and the two ends of the second sealing part; The second sealing part includes: The second bottom extends a predetermined length along the second direction; and The wing protrudes from the second bottom in a direction away from the receiving portion and extends a predetermined length along the second direction; In the first direction, cover mounting grooves for mounting the exhaust cover on both sides are provided on both sides of the open portion, and the wing is located between the cover mounting grooves and the two sides of the exhaust cover; The wing portion is in continuous contact with one side of the cover mounting groove and both sides of the exhaust cover.

2. The arc-extinguishing assembly according to claim 1, wherein, The sealing member includes an elastic member.

3. The arc-extinguishing assembly according to claim 1, wherein, It also includes an arc-extinguishing assembly fastening component, which penetrates the exhaust cover and the mounting portion, with one end penetrating the exhaust cover and the mounting portion being fastened to the mounting space. The sealing member is elastically deformed by the fastening force of the arc-extinguishing assembly fastening member.

4. The arc-extinguishing assembly according to claim 1, wherein, In the first direction, the length of the exhaust cover is greater than the length of the exhaust body.

5. The arc-extinguishing assembly according to claim 4, wherein, The wing is pressurized and elastically deformed between one side of the cover mounting groove and both sides of the exhaust cover.

6. The arc-extinguishing assembly according to claim 4, wherein, A portion of the exhaust cover facing the cover mounting groove is provided with a wing receiving groove recessed to a predetermined depth.

7. The arc-extinguishing assembly according to claim 4, wherein, The thickness of the wing is greater than the distance between one side of the cover mounting groove and the exhaust cover.

8. The arc-extinguishing assembly according to claim 1, wherein, A first sealing insert groove and a third sealing insert groove are provided in a portion of the mounting part facing the mounting space. The first sealing part is inserted into the first sealing part insertion groove. The third sealing part is inserted into the third sealing part insertion groove.

9. The arc-extinguishing assembly according to claim 8, wherein, The first sealing part is pressurized and elastically deformed between one side of the mounting space and the insertion groove of the first sealing part. The third sealing part is pressurized and elastically deformed between the other side of the installation space and the insertion groove of the third sealing part.

10. The arc-extinguishing assembly according to claim 8, wherein, The thickness of the first sealing portion is greater than the distance between one side of the mounting space and the insertion groove of the first sealing portion. The thickness of the third sealing part is greater than the distance between the other side of the mounting space and the insertion groove of the third sealing part.

11. The arc-extinguishing assembly according to claim 1, wherein, The second sealing portion includes a hook insertion portion that extends a predetermined length from the second bottom toward the receiving portion and then protrudes a predetermined length toward the exhaust body.

12. The arc-extinguishing assembly according to claim 11, wherein, An insertion groove of a predetermined depth is provided on one side of the exhaust body facing the hook insertion part. The hook insertion portion is accommodated in the insertion slot.

13. The arc-extinguishing assembly according to claim 1, wherein, A second protrusion is provided in a portion of the second bottom, which is the opposite side to the side facing the exhaust cover.

14. The arc-extinguishing assembly according to claim 1, wherein, In the first sealing portion, the first protrusion extends a predetermined length in the direction in which it protrudes from the mounting portion. A recessed space is provided on one side of the mounting portion facing the first protrusion, into which the first protrusion is inserted.

15. A circuit breaker, wherein, include: The circuit breaker body has an open-side receiving space on its inner side; as well as An arc-extinguishing assembly is inserted into the receiving space and has an exhaust section that covers the open portion of the receiving space; The exhaust section includes: The exhaust body is provided with a receiving part that runs through the center and mounting parts that protrude from both sides; An exhaust cap, which is attached to one side of the exhaust body, covers the receiving portion; and The sealing component is combined with the exhaust body; In the first direction in which the mounting part protrudes, mounting spaces for mounting the mounting part are respectively provided on both sides of the open portion of the receiving space. In the installation space, a first mating surface facing the mounting portion and third mating surfaces on both sides of the first mating surface facing the mounting portion are respectively provided. In a second direction intersecting the first direction, second mating surfaces supporting the two sides of the exhaust cover are respectively provided on both sides of the open portion of the accommodating space. The sealing component includes: The first sealing part is located between the mounting part and the first mating surface; The second sealing portion is located on both sides in the second direction, between the exhaust cover and the exhaust body; and The third sealing part is located between the mounting part and the third mating surface, connecting the two ends of the first sealing part and the two ends of the second sealing part; The second sealing part includes: The second bottom extends a predetermined length along the second direction; and The wing protrudes from the second bottom in a direction away from the receiving portion and extends a predetermined length along the second direction; In the first direction, cover mounting grooves for mounting the exhaust cover on both sides are provided on both sides of the open portion, and the wing is located between the cover mounting grooves and the two sides of the exhaust cover; The wing portion is in continuous contact with one side of the cover mounting groove and both sides of the exhaust cover.

16. The circuit breaker according to claim 15, wherein, The wing is pressurized and elastically deformed between the second mating surface and the two sides of the exhaust cap.

17. The circuit breaker according to claim 16, wherein, A portion of the exhaust cover facing the second mating surface is provided with a recessed wing receiving groove of a specified depth.

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