CN220856376U - Arc extinguishing device of switch - Google Patents
Arc extinguishing device of switch Download PDFInfo
- Publication number
- CN220856376U CN220856376U CN202322580909.6U CN202322580909U CN220856376U CN 220856376 U CN220856376 U CN 220856376U CN 202322580909 U CN202322580909 U CN 202322580909U CN 220856376 U CN220856376 U CN 220856376U
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- Prior art keywords
- arc
- side plate
- arc extinguishing
- isolation cover
- switch
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- 238000004880 explosion Methods 0.000 claims abstract 6
- 238000002955 isolation Methods 0.000 claims description 38
- 230000003068 static effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
An arc extinguishing device of a switch belongs to the technical field of low-voltage electrical appliances. The switch includes base and extinguishing device, extinguishing device including installing the explosion chamber in the base, the explosion chamber include a pair of curb plate that face-to-face each other set up and set up the arc chute piece between a pair of curb plate with the interval state, extinguishing device still including installing the arc shield that is used for covering arc chute piece leg on the explosion chamber, the curb plate on seted up the curb plate opening, the arc shield install in the curb plate opening, be provided with the backstop structure that prevents to separate the arc shield from withdrawing from the curb plate opening between curb plate opening and arc shield. The advantages are that: the arc extinguishing chamber is designed and improved, so that the arc extinguishing chamber is convenient to install, reliable in matching and stable in positioning, and the breaking capacity of the switch is guaranteed.
Description
Technical Field
The utility model belongs to the technical field of piezoelectric devices, and particularly relates to an arc extinguishing device of a switch.
Background
The switch comprises an arc extinguishing device, a contact system, an operating mechanism and other components. The arc-extinguishing chamber is an important component of the switch, and when the moving contact and the fixed contact of the switch are separated, an arc can be generated, and because the moving path of the contact arm of the moving contact is in the cavity of the arc-extinguishing grid plate, the arc can enter the arc-extinguishing chamber in the generating process, and the arc is led between the grid plates through the arc-extinguishing grid plate, so that the arc is cut into series short arcs, the arc is thinned, the arc voltage is rapidly increased, and the arc-extinguishing effect is achieved.
The arc extinguishing chamber has the function of extinguishing the arc generated on the contact system, the arc extinguishing gate sheet is arranged in the existing arc extinguishing chamber, the arc extinguishing gate sheet is riveted with two sides of the arc extinguishing chamber by adopting insulating plates, the insulating arc isolating covers are arranged on two sides of the legs of the arc extinguishing gate sheet, and a deep arcing channel is formed by the insulating arc isolating covers, so that the arc generated during breaking current is lengthened and developed towards the deep part of the arc extinguishing device, the extinguishing speed of the arc is improved, but the stability of the arc is maintained, the existing insulating arc isolating covers are generally in short supply, the gas generating material of ultrasonic welding is easy to fall off during breaking, so that a moving contact guide rod is clamped, and meanwhile, the position of the arc extinguishing chamber is not stable enough after being assembled into a switch body, is easy to shift due to the impact of air current, and the breaking performance is influenced. The existing arc extinguishing device structure has room for improvement in the technology.
Disclosure of utility model
The utility model aims to provide an arc-extinguishing device of a switch, which is used for improving the design of an arc-extinguishing chamber, so that the arc-extinguishing chamber is convenient to install, reliable in matching and stable in positioning, and the breaking capacity of the switch is ensured.
The object of the utility model is achieved by an arc extinguishing device for a switch comprising a base and an arc extinguishing device comprising an arc extinguishing chamber mounted in the base, the arc extinguishing chamber comprising a pair of side plates arranged facing each other and an arc extinguishing gate arranged between the pair of side plates in a spaced-apart condition, the arc extinguishing device further comprising an arc separating cover mounted on the arc extinguishing chamber for covering the legs of the arc extinguishing gate, characterized in that: the side plate is provided with a side plate opening, the arc isolation cover is arranged in the side plate opening, and a stop structure for preventing the arc isolation cover from withdrawing from the side plate opening is arranged between the side plate opening and the arc isolation cover.
In a specific embodiment of the utility model, the arc isolation cover is provided with accommodating cavities at intervals in the height direction for wrapping the arc extinguishing grid plates, the accommodating cavities are 冂 -shaped cavities formed by outer side walls, inner side walls and front side walls of the accommodating cavities, which directly extend on the arc isolation cover, and the arc extinguishing grid plate legs are inserted into the accommodating cavities.
In another specific embodiment of the present utility model, the side plate opening includes a side plate upper top surface and a side plate lower bottom surface, the arc-blocking cover is installed between the upper top surface and the side plate lower bottom surface, and the side plate upper top surface and the side plate lower bottom surface restrict movement of the arc-blocking cover in a height direction.
In yet another specific embodiment of the present utility model, the stop structure includes a groove disposed in the side plate opening and a boss disposed on the arc-isolating cover corresponding to the groove; or a boss arranged in the opening of the side plate and a groove arranged on the arc-isolating cover and corresponding to the boss.
In still another specific embodiment of the present utility model, the arc isolation cover is provided with an abutting portion that is in abutting engagement with the base, and the abutting portion is an extension section formed by extending the outer side wall of the accommodating cavity in a direction away from the arc extinguishing grid plate and perpendicular to the front side wall of the accommodating cavity.
In a further specific embodiment of the utility model, at least one supporting block for supporting the abutting portion is arranged between the abutting portion of the arc-isolating cover and the front side wall of the accommodating cavity.
In a further specific embodiment of the utility model, the base is provided with an abutment surface cooperating with an abutment portion, the end of the abutment portion facing the abutment surface being provided with an abutment protrusion, which abutment protrusion rests on or is snapped onto the abutment surface.
In a further specific embodiment of the present utility model, a stopper for limiting the base is disposed at an outer side of the outer side wall of the accommodating cavity at intervals.
In yet another specific embodiment of the present utility model, the arc extinguishing chamber further includes an upper arc striking plate disposed at an upper portion of the arc extinguishing gate sheet for striking an arc generated on the movable contact, and a lower arc striking plate disposed at a lower portion of the arc extinguishing gate sheet for striking an arc generated on the stationary contact.
The utility model has the beneficial effects that due to the adoption of the structure, the utility model has the following advantages: the first arc-isolation cover is arranged in a clamping way instead of welding, so that the arc-isolation cover is prevented from falling out of the side plate after being arranged, the assembly reliability of the arc-isolation cover is improved, and the production cost is reduced; secondly, by arranging the supporting block between the abutting part of the arc isolation cover and the front side wall of the accommodating cavity, the strength of the abutting part is enhanced, the firmness of the arc extinguishing device is enhanced, the service life of the arc extinguishing device is prolonged, and the breaking capacity of the switch is ensured; and thirdly, the arc extinguishing device is limited to shake back and forth through the cooperation of the arc isolation cover abutting part and the base, and the arc extinguishing device is limited to shake left and right through the cooperation of the limiting block and the base, so that the arc extinguishing chamber is reliably matched with the base of the switch.
Drawings
Fig. 1 is an exploded view of an arc extinguishing device according to the present utility model;
fig. 2 is a schematic side view of an arc isolation cover of the arc extinguishing device according to the present utility model;
Fig. 3 is another schematic side view of the arc chute of the arc extinguishing device of the present utility model;
Fig. 4 is a perspective view of an arc extinguishing device according to the present utility model;
fig. 5 is a schematic installation diagram of the arc extinguishing device and the base.
In the figure: 1. the base, 11, the abutting surface, 12, the side of cavity; 2. arc extinguishing chamber, side plate, 211, side plate opening, 2111, side plate upper top surface, 2112, side plate lower bottom surface, 2113, side plate concave part, 2114, groove, 212, arc extinguishing grid plate positioning flange hole, 22, arc extinguishing grid plate, 221, arc extinguishing grid plate leg, 222, arc extinguishing grid plate positioning flange, 23, upper arc striking plate, 24, lower arc striking plate; 3. arc isolation cover, 31, accommodating cavity, 32, abutting part, 321, abutting convex part, 33, outer side wall of accommodating cavity, 331, side plate matching convex part, 332, boss, 34, inner side wall of accommodating cavity, 35, front side wall of accommodating cavity, 36, supporting block, 37, limiting block and 38, moving contact moving cavity.
Detailed Description
The following detailed description of specific embodiments of the utility model, while given in connection with the accompanying drawings, is not intended to limit the scope of the utility model, and any changes that may be made in the form of the inventive concepts described herein, without departing from the spirit and scope of the utility model.
In the following description, any reference to the directions or azimuths of up, down, left, right, front and rear is based on the positions shown in the corresponding drawings, and therefore, should not be construed as a limitation on the technical solutions provided by the present utility model.
Referring to fig. 1, 4 and 5, the present utility model relates to an arc extinguishing device of a switch, the switch includes a base 1, a moving contact, a fixed contact and the arc extinguishing device of the present utility model, the arc extinguishing device includes an arc extinguishing chamber 2 installed in the base 1, the arc extinguishing chamber 2 includes a pair of side plates 21 disposed opposite to each other and arc extinguishing gate plates 22 disposed between the pair of side plates 21 in a spaced state from top to bottom or from bottom to top, and the arc extinguishing chamber 2 further includes an upper arc striking plate 23 and a lower arc striking plate 24, as shown in fig. 1 and 4, since each arc extinguishing gate plate 22, upper arc striking plate 23 and lower arc striking plate 24 are inclined from left to right at a certain inclination angle, the arc extinguishing chamber is distributed between the pair of side plates 21 in a fan-shaped state as a whole.
Referring to fig. 1 to 5, the arc extinguishing device further includes an arc isolating cover 3 mounted on the arc extinguishing chamber 2 for covering the arc extinguishing gate legs 221, and a pair of side plates 21 and arc extinguishing gate 22 are in plug-in fit with the arc isolating cover 3. The side plate 21 is provided with a side plate opening 211 towards the direction of the arc isolation cover 3, the side plate opening 211 comprises a side plate upper top surface 2111 and a side plate lower bottom surface 2112, the arc isolation cover 3 is arranged between the side plate upper top surface 2111 and the side plate lower bottom surface 2112, and the side plate upper top surface 2111 and the side plate lower bottom surface 2112 limit the movement of the arc isolation cover 3 in the height direction.
Referring to fig. 1 and 2, in order to better protect the arc extinguishing gate 22 near the position of the switch fixed contact, a side plate concave portion 2113 is provided on one side surface of the side plate 21 in the direction near the arc isolation cover 3, a side plate matching convex portion 331 is provided on the outer side wall 33 of the accommodating cavity of the arc isolation cover 3 at the position corresponding to the side plate concave portion 2113, and the side plate concave portion 2112 is matched with the side plate matching convex portion 331. After the arc isolation cover 3 is mounted on the arc extinguishing chamber 2, the arc extinguishing gate legs 221 on the arc extinguishing gate 22 at the lower part of the arc extinguishing chamber 2 are wrapped more by the accommodating cavity formed between the side plate matching convex part 331 and the inner side wall 34 of the accommodating cavity, so that burning loss is prevented.
In order to prevent the arc-separating cover 3 from being withdrawn from the side plate opening 211 after being mounted to the arc extinguishing chamber 2, a stopper structure is provided between the arc-separating cover 3 and the side plate opening 211, the stopper structure including a groove provided on the side plate lower bottom surface 2112 and a boss provided on the housing chamber outer side wall 33 corresponding to the groove on the side plate lower bottom surface 2112; or a groove provided on the side plate upper top surface 2111 and a boss provided on the housing chamber outer side wall 33 corresponding to the groove on the side plate upper top surface 2111; or a boss provided on the side plate lower bottom surface 2112 and a groove provided on the housing chamber outer side wall 33 corresponding to the boss on the side plate lower bottom surface 2112; or a boss provided on the side plate upper top surface 2111 and a groove provided on the housing chamber outer side wall 33 corresponding to the boss on the side plate upper top surface 2111.
The stopper structure described in this embodiment is preferably a combination of a groove 2114 provided on the side plate lower bottom surface 2112 and a boss 332 provided on the housing chamber outer side wall 33. After the arc-isolating cover 3 is mounted on the arc extinguishing chamber 2, the side plate concave portion 2113 is attached to the side plate matching convex portion 331, the groove 2114 is clamped with the boss 332, and the arc-isolating cover 3 is limited in front and back to prevent the arc-isolating cover 3 from exiting from the side plate opening 211.
The boss 332 is an arc-shaped boss or a trapezoid boss correspondingly matched with the groove 2114, and the embodiment is preferably a trapezoid boss; the groove 2114 is a circular arc groove, an inverted trapezoid groove or the like, and the inverted trapezoid groove is preferred in this embodiment.
Referring to fig. 2, the accommodating cavity 31 is a 冂 -shaped cavity formed by an accommodating cavity outer side wall 33, an accommodating cavity inner side wall 34 and an accommodating cavity front side wall 35 which directly extend on the arc isolation cover 3, and the arc extinguishing gate plate legs 221 are inserted into the accommodating cavity 31, so that the accommodating cavity inner side walls 34 on the accommodating cavities 31 on two sides, into which the arc extinguishing gate plate legs 221 of the arc extinguishing gate plates 22 are inserted, are arranged face to face, and a space between the accommodating cavity inner side walls 34 arranged face to face is formed as a moving contact moving cavity 38 for moving a moving contact.
Referring to fig. 3 and fig. 5, the arc isolation cover 3 is provided with an abutting portion 32 that is in abutting engagement with the base 1, and the abutting portion 32 is an extension portion formed by extending the outer sidewall 33 of the accommodating cavity in a direction away from the arc extinguishing gate 22 and perpendicular to the front sidewall 35 of the accommodating cavity. The base 1 is provided with an abutting surface 11 matched with an abutting part 32, and the abutting part 32 abuts against the abutting surface 11 to limit the front-back shaking of the arc extinguishing device. Further, an end of the abutting portion 32 facing the abutting surface 11 is provided with an abutting convex portion 321, and the abutting convex portion 321 abuts against the abutting surface 11 or is clamped in a clamping groove on the abutting surface 11. The abutment protrusion 321 may have various shapes, such as a rectangle, a trapezoid, etc., and the present embodiment is preferably a rectangle.
At least one supporting block 36 for supporting the abutting portion 32 is arranged between the abutting portion 32 of the arc isolation cover 3 and the front side wall 35 of the accommodating cavity, the supporting block 36 is triangular, two sides of the supporting block 36 are respectively connected with the abutting portion 32 and the front side wall 35 of the accommodating cavity, and the supporting blocks 36 are arranged at intervals along the height direction of the arc isolation cover 3. The support blocks 36 strengthen the abutting portion 32, and prevent the abutting portion 32 from being deformed or broken after the arc extinguishing device is mounted. For optimal effect, the support block 36 is arranged between the abutment protrusion 321 and the front side wall 35 of the receiving cavity.
The outer side of the outer side wall 33 of the accommodating cavity is provided with a limiting block 37 at intervals for limiting the base 1, the limiting block 37 is a strip-shaped protruding block arranged at intervals along the height direction of the arc isolation cover 3, and the limiting block 37 cooperates with the cavity side 12 of the base 1 to limit the left-right shaking of the arc extinguishing device.
With continued reference to fig. 1 and 2, arc-extinguishing gate positioning flange holes 212 are respectively formed at positions corresponding to each other between the pair of side plates 21, and arc-extinguishing gate positioning flanges 222 extend from positions corresponding to the arc-extinguishing gate positioning flange holes 212 on both sides of the arc-extinguishing gate 22, and the arc-extinguishing gate positioning flanges 222 are in riveted fit with the arc-extinguishing gate positioning flange holes 212.
The arc extinguishing chamber 2 further comprises an upper arc striking plate 23 arranged on the upper part of the arc extinguishing grid piece 22 and a lower arc striking plate 24 arranged on the lower part of the arc extinguishing grid piece 22. When the switch is disconnected, an arc is generated when the moving contact of the switch is opened, the upper arc striking plate 23 is connected with an arc generated on the moving contact, and the lower arc striking plate 24 is connected with an arc generated on the fixed contact and extinguishes through the arc extinguishing chamber 2.
Referring to fig. 4, from the above description and from the schematic of fig. 4, it can be seen that: the arc isolation cover 3 is preferably arranged in bilateral symmetry, and the arc isolation cover 3 can be integrally arranged. The arc isolation cover 3 is made of an insulating gas generating material.
Claims (9)
1. An arc extinguishing device of a switch, the switch includes base (1) and arc extinguishing device, the arc extinguishing device including install explosion chamber (2) in base (1), explosion chamber (2) include a pair of curb plate (21) that face-to-face setting each other and set up arc extinguishing bars piece (22) between a pair of curb plate (21) with interval state, arc extinguishing device still including installing arc extinguishing bars piece leg (221) of being used for cover arc extinguishing bars piece cover (3), its characterized in that on explosion chamber (2): the side plate (21) is provided with a side plate opening (211), the arc isolation cover (3) is arranged in the side plate opening (211), and a stop structure for preventing the arc isolation cover (3) from withdrawing from the side plate opening (211) is arranged between the side plate opening (211) and the arc isolation cover (3).
2. The arc suppressing apparatus of a switch as defined in claim 1, wherein: the arc isolation cover (3) is provided with accommodating cavities (31) used for wrapping arc extinguishing grid plates (22) at intervals in the height direction, the accommodating cavities (31) are 冂 -shaped cavities formed by accommodating cavity outer side walls (33), accommodating cavity inner side walls (34) and accommodating cavity front side walls (35) which directly extend on the arc isolation cover (3), and arc extinguishing grid plate legs (221) are inserted into the accommodating cavities (31).
3. The arc suppressing apparatus of a switch as defined in claim 1, wherein: the side plate opening (211) comprises a side plate upper top surface (2111) and a side plate lower bottom surface (2112), the arc isolation cover (3) is arranged between the side plate upper top surface (2111) and the side plate lower bottom surface (2112), and the side plate upper top surface (2111) and the side plate lower bottom surface (2112) limit the arc isolation cover (3) to move in the height direction.
4. The arc suppressing apparatus of a switch as defined in claim 1, wherein: the stop structure comprises a groove arranged in the side plate opening (211) and a boss which is arranged on the arc isolation cover (3) and corresponds to the groove; or a boss arranged in the side plate opening (211) and a groove arranged on the arc isolation cover (3) and corresponding to the boss.
5. The arc suppressing apparatus of a switch as defined in claim 2, wherein: the arc isolation cover (3) is provided with an abutting part (32) which is in abutting fit with the base (1), and the abutting part (32) is an extension section formed by extending the outer side wall (33) of the accommodating cavity in a direction away from one side of the arc extinguishing grid sheet (22) and perpendicular to the front side wall (35) of the accommodating cavity.
6. The switching arc extinguishing device of claim 5 wherein: at least one supporting block (36) for supporting the abutting part (32) is arranged between the abutting part (32) of the arc isolation cover (3) and the front side wall (35) of the accommodating cavity.
7. The switching arc extinguishing device of claim 5 wherein: the base (1) is provided with an abutting surface (11) matched with the abutting part (32), the end part of the abutting part (32) facing the abutting surface (11) is provided with an abutting convex part (321), and the abutting convex part (321) abuts against the abutting surface (11) or is clamped on the abutting surface (11).
8. The arc suppressing apparatus of a switch as defined in claim 2, wherein: limiting blocks (37) used for limiting the base (1) are arranged at intervals on the outer side of the outer side wall (33) of the accommodating cavity.
9. The arc suppressing apparatus of a switch as defined in claim 1, wherein: the arc extinguishing chamber (2) also comprises an upper arc striking plate (23) arranged at the upper part of the arc extinguishing grid sheet (22) and used for connecting and striking the arc generated on the movable contact, and a lower arc striking plate (24) arranged at the lower part of the arc extinguishing grid sheet (22) and used for connecting and striking the arc generated on the static contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322580909.6U CN220856376U (en) | 2023-09-22 | 2023-09-22 | Arc extinguishing device of switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322580909.6U CN220856376U (en) | 2023-09-22 | 2023-09-22 | Arc extinguishing device of switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220856376U true CN220856376U (en) | 2024-04-26 |
Family
ID=90747374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322580909.6U Active CN220856376U (en) | 2023-09-22 | 2023-09-22 | Arc extinguishing device of switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220856376U (en) |
-
2023
- 2023-09-22 CN CN202322580909.6U patent/CN220856376U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |