CN215955222U - Arc extinguish chamber device of circuit breaker - Google Patents
Arc extinguish chamber device of circuit breaker Download PDFInfo
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- CN215955222U CN215955222U CN202122604808.9U CN202122604808U CN215955222U CN 215955222 U CN215955222 U CN 215955222U CN 202122604808 U CN202122604808 U CN 202122604808U CN 215955222 U CN215955222 U CN 215955222U
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Abstract
An arc extinguish chamber device of a circuit breaker belongs to the technical field of low-voltage electrical appliances. The circuit breaker includes the casing, installs in the casing and installs the explosion chamber that is used for extinguishing disconnected electric arc of dividing, correspond explosion chamber gas outlet position on the casing and offer the opening that is used for discharging disconnected gaseous, characteristics are: the circuit breaker further comprises a shielding plate, the shielding plate is installed in the opening and shields the lower portion of the opening, the height of the shielding plate is higher than that of a wiring screw of the circuit breaker after the shielding plate is installed in place, the shielding plate is used for preventing electric arcs generated by breaking of the circuit breaker from polluting the wiring screw, an air outlet is further formed in the upper portion of the opening, and the area of the air outlet is more than 30% of the area of the opening. The advantages are that: through the area of the exhaust port at the air outlet position of the arc extinguish chamber of the circuit breaker, gas is rapidly exhausted from the exhaust port, and the shell of the circuit breaker is prevented from being damaged.
Description
Technical Field
The utility model belongs to the technical field of low-voltage electric appliances, and particularly relates to an arc extinguish chamber device of a circuit breaker.
Background
In recent years, breaking indexes of the molded case circuit breaker are continuously improved, however, the size of the circuit breaker is more and more miniaturized, the space limitation leads the pressure inside an arc extinguish chamber of the circuit breaker to be more and more large in the breaking process, the shell is often exploded by airflow generated in breaking, a contact system and an arc extinguish system are continuously consumed by generated electric arcs, breaking capacity cannot be improved, and the circuit breaker is easily damaged, so that how to realize quick and efficient exhaust of electric arc gas in the arc extinguish chamber is an important guarantee for improving breaking performance.
In view of the above-mentioned prior art, there is a need for a reasonable improvement of the arc chute arrangement structure of the existing circuit breaker. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an arc extinguish chamber device of a circuit breaker, which can rapidly exhaust gas from an exhaust port by increasing the area of the exhaust port at the air outlet position of the arc extinguish chamber of the circuit breaker so as to prevent the shell of the circuit breaker from being damaged.
The task of the utility model is accomplished in such a way that the circuit breaker comprises a shell, an arc extinguish chamber for extinguishing the breaking electric arc is arranged in the shell, an opening for discharging the breaking gas is arranged on the shell corresponding to the gas outlet of the arc extinguish chamber, and the circuit breaker is characterized in that: the circuit breaker further comprises a shielding plate, the shielding plate is installed in the opening and shields the lower portion of the opening, the height of the shielding plate is higher than that of a wiring screw of the circuit breaker after the shielding plate is installed in place, the shielding plate is used for preventing electric arcs generated by breaking of the circuit breaker from polluting the wiring screw, an air outlet is further formed in the upper portion of the opening, and the area of the air outlet is more than 30% of the area of the opening.
In a specific embodiment of the present invention, the housing includes an upper cover and a base, and the opening is opened at the wire inlet end of the assembled upper cover and base.
In another specific embodiment of the present invention, the shielding plate is provided with an exhaust groove, a height L1 of the shielding plate is equal to a height L of the opening, and the exhaust port is the exhaust groove provided on the shielding plate.
In another specific embodiment of the present invention, the shielding plate is provided with an exhaust groove, the height L1 of the shielding plate is lower than the height L of the opening, and the exhaust port is an opening portion formed by the exhaust groove and the opening.
In another specific embodiment of the present invention, the shielding plate is a solid flat plate, the height L1 of the shielding plate is lower than the height L of the opening, and the exhaust opening is the opening portion of the opening higher than the shielding plate.
In another specific embodiment of the present invention, the exhaust groove on the shielding plate is trapezoidal, circular, square or U-shaped.
In yet another embodiment of the present invention, the exhaust port area is 60% to 80% of the opening area.
In a more specific embodiment of the present invention, the shielding plate material is a gas generating material.
In yet another embodiment of the present invention, the gas generating material is melamine, nylon or DMC.
In a more specific embodiment of the present invention, an insulating partition plate is further disposed between the shielding plate and the opening, and the insulating partition plate is provided with a horizontal indentation, and when the gas in the arc extinguish chamber rushes out, the upper end of the insulating partition plate is turned outwards along the indentation.
Due to the adoption of the structure, the utility model has the beneficial effects that: firstly, gas is rapidly exhausted from an exhaust port by increasing the area of the exhaust port at the exhaust position of an arc extinguish chamber of the circuit breaker, so that the shell of the circuit breaker is prevented from being damaged; and secondly, an insulating partition plate is arranged between the shielding plate and the opening, and the insulating partition plate selects whether to seal the exhaust port according to whether high-pressure gas is exhausted from the arc extinguishing chamber, so that proper sealing and releasing actions are performed.
Drawings
Fig. 1 is a schematic perspective view of a circuit breaker according to the present invention.
Fig. 2 is a perspective view of the circuit breaker base according to the present invention.
Fig. 3 is a schematic diagram of the circuit breaker arc extinguish chamber and the shielding plate in cooperation.
Fig. 4 is a schematic diagram of the matching of the arc extinguish chamber, the shielding plate and the insulating partition plate of the circuit breaker.
Figure 5 is a side view of the circuit breaker arc chute, shield and insulating barrier in accordance with the present invention.
Fig. 6 is a front view of the circuit breaker shutter according to the present invention.
In the figure: 1. the shell, 11, an upper cover, 12, a base, 121, a positioning part, 122, a cavity and 13, wherein the shell is provided with an opening; 2. an arc extinguishing chamber 21, an arc extinguishing grid sheet; 3. a shielding plate 31, an exhaust groove; 4. insulating spacers, 41, indentations.
Detailed Description
The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments by the applicant is not intended to limit the technical solutions, and any changes made in the form of the present invention rather than the essential changes should be regarded as the protection scope of the present invention.
In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the positions shown in the corresponding drawings, and thus, should not be construed as particularly limiting the technical solution provided by the present invention.
Example 1
Referring to fig. 1 to 6, the present embodiment relates to an arc extinguishing chamber device of a circuit breaker, where the circuit breaker includes a housing 1, a rotating shaft system, an operating mechanism, a contact system, and an arc extinguishing system. The operating mechanism is arranged in a shell 1 of the circuit breaker and used for switching on and off the circuit breaker, and the rotating shaft system receives the action of the operating mechanism and transmits the action to the contact system to realize the switching-off or switching-on operation of the circuit breaker. As shown in fig. 1 and 2, the housing 1 includes an upper cover 11 and a base 12, and the base 12 is provided with a plurality of cavities 122.
As shown in fig. 2 to 5, the arc extinguishing system include the explosion chamber device, the explosion chamber device include explosion chamber 2, set up shielding plate 3, the setting that is in 2 front ends of explosion chamber positions of giving vent to anger and paste the insulating barrier 4 who pastes shielding plate 3 at 3 front ends of shielding plate, the laminating of the arc extinguishing bars piece 21 that sets up on 3 one sides of shielding plate and the explosion chamber 2, the laminating of another side and insulating barrier 4. Arc extinguishing chamber 2 installs in the appearance chamber 122 of base 12 with shielding plate 3, insulating barrier 4 jointly, still is provided with location portion 121 on the base 12, and shielding plate 3 and insulating barrier 4 are installed in place after, and location portion 121 fixes a position shielding plate 3 and insulating barrier 4.
As shown in fig. 1 to 3, the housing formed by assembling the upper cover 11 and the base 12 is formed with an opening 13 at a wire inlet end, i.e. at a position corresponding to the gas outlet of the arc extinguish chamber 2, the shielding plate 3 is installed inside the opening 13 and shields the lower part of the opening 13, the height of the shielding plate 3 is higher than that of the wiring screw of the circuit breaker after the shielding plate 3 is installed in place, the shielding plate 3 is used for preventing the electric arc generated by the circuit breaker breaking from polluting the wiring screw, and the upper end of the opening 13 is further formed with a gas outlet for discharging gas when the circuit breaker is broken, and the area of the gas outlet is more than 30% of the area of the opening 13, preferably 60% to 80%.
As shown in fig. 4 and 5, the insulating partition plate 4 is attached to the shielding plate 3 to close the exhaust port on the opening 13, and the insulating partition plate 4 is provided with a horizontal indentation 41, wherein the indentation 41 is flush with the bottom of the exhaust groove 31. When the breaker is disconnected and the arc erodes the gas-generating material, the gas-generating material generates gas to increase the gas pressure in the arc extinguish chamber 2, thereby increasing the arc voltage in the disconnection process, accelerating the arc extinction speed, and simultaneously, the high-pressure gas generated in the arc extinguish chamber 2 is quickly exhausted through the exhaust port of the opening 13, so that the upper end of the insulating partition plate 4 is outwards overturned along the indentation 41, as shown in fig. 5, the sealing of the exhaust port of the opening 13 is released, and the blocking of the exhaust speed is reduced.
Preferably, as shown in fig. 6, an exhaust groove 31 is provided above the shielding plate 3, the exhaust groove 31 is trapezoidal, the shielding plate 3 is made of melamine, the height L1 of the shielding plate 3 is lower than the height L of the opening 13, and the exhaust port is an opening formed by the exhaust groove 31 and the opening 13.
Example 2
The present embodiment is different from embodiment 1 in that: the exhaust groove 31 above the shielding plate 3 is trapezoidal, the height L1 of the shielding plate 3 is consistent with the height L of the opening 13, and the exhaust port is the exhaust groove 31 arranged on the shielding plate 3.
Example 3
The present embodiment is different from embodiment 1 in that: the exhaust groove 31 above the shielding plate 3 is circular (not shown in the figure), the height L1 of the shielding plate 3 is lower than the height L of the opening 13, and the exhaust port is an opening formed by the exhaust groove 31 and the opening 13.
Example 4
The present embodiment is different from embodiment 1 in that: the exhaust groove 31 above the shielding plate 3 is circular (not shown in the figure), the height L1 of the shielding plate 3 is consistent with the height L of the opening 13, and the exhaust port is the exhaust groove 31 arranged on the shielding plate 3.
Example 5
The present embodiment is different from embodiment 1 in that: the exhaust groove 31 above the shielding plate 3 is square (not shown in the figure), the height L1 of the shielding plate 3 is lower than the height L of the opening 13, and the exhaust port is an opening formed by the exhaust groove 31 and the opening 13.
Example 6
The present embodiment is different from embodiment 1 in that: the exhaust groove 31 above the shielding plate 3 is square (not shown in the figure), the height L1 of the shielding plate 3 is consistent with the height L of the opening 13, and the exhaust port is the exhaust groove 31 arranged on the shielding plate 3.
Example 7
The present embodiment is different from embodiment 1 in that: the exhaust groove 31 above the shielding plate 3 is U-shaped (not shown in the figure), the height L1 of the shielding plate 3 is lower than the height L of the opening 13, and the exhaust port is an opening formed by the exhaust groove 31 and the opening 13.
Example 8
The present embodiment is different from embodiment 1 in that: the exhaust groove 31 above the shielding plate 3 is U-shaped (not shown in the figure), the height L1 of the shielding plate 3 is consistent with the height L of the opening 13, and the exhaust port is the exhaust groove 31 arranged on the shielding plate 3.
Example 9
The present embodiment is different from embodiment 1 in that: the shielding plate 3 is a solid flat plate structure, the exhaust groove 31 is not arranged above the shielding plate 3, the height L1 of the shielding plate 3 is lower than the height L of the opening 13, and the exhaust port is an opening part of the opening 13 which is higher than the shielding plate 3.
It is to be understood that the above-described embodiments are illustrative only and not restrictive of the broad invention, and that various other modifications and changes in light thereof will be suggested to persons skilled in the art based upon the above teachings. And are neither required nor exhaustive of all embodiments. Obvious variations or modifications of this invention are intended to be covered by the present patent.
Claims (10)
1. The utility model provides an explosion chamber device of circuit breaker, the circuit breaker includes casing (1), installs explosion chamber (2) that are used for extinguishing disconnected electric arc of branch in casing (1), correspond explosion chamber (2) gas outlet position on casing (1) and offer opening (13) that are used for the disconnected gaseous of discharge, its characterized in that: the circuit breaker further comprises a shielding plate (3), the shielding plate (3) is installed inside the opening (13) and shields the lower portion of the opening (13), the height of the shielding plate (3) is higher than that of a wiring screw of the circuit breaker after the shielding plate is installed in place, the shielding plate is used for preventing electric arcs generated by circuit breaker breaking from polluting the wiring screw, an exhaust port is further formed in the upper portion of the opening (13), and the area of the exhaust port is more than 30% of that of the opening (13).
2. Arc chute arrangement of a circuit breaker according to claim 1, characterized in that: the shell (1) comprises an upper cover (11) and a base (12), and the opening (13) is formed in the wire inlet end formed by assembling the upper cover (11) and the base (12).
3. Arc chute arrangement of a circuit breaker according to claim 1, characterized in that: the shielding plate (3) is provided with an exhaust groove (31), the height L1 of the shielding plate (3) is equal to the height L of the opening (13), and the exhaust port is the exhaust groove (31) arranged on the shielding plate (3).
4. Arc chute arrangement of a circuit breaker according to claim 1, characterized in that: the shielding plate (3) is provided with an exhaust groove (31), the height L1 of the shielding plate (3) is lower than the height L of the opening (13), and the exhaust port is an opening part formed by the exhaust groove (31) and the opening (13).
5. Arc chute arrangement of a circuit breaker according to claim 1, characterized in that: the shielding plate (3) is of a solid flat plate structure, the height L1 of the shielding plate (3) is lower than the height L of the opening (13), and the exhaust port is an opening part of the opening (13) which is higher than the shielding plate (3).
6. Arc chute arrangement of a circuit breaker according to claim 4, characterized in that: the exhaust groove (31) on the shielding plate (3) is trapezoidal, circular, square or U-shaped.
7. Arc chute arrangement of a circuit breaker according to claim 1, characterized in that: the area of the exhaust port is 60-80% of the area of the opening (13).
8. Arc chute arrangement of a circuit breaker according to claim 1, characterized in that: the material of the shielding plate (3) is a gas generating material.
9. Arc chute arrangement of a circuit breaker according to claim 8, characterized in that: the gas generating material is melamine, nylon or DMC.
10. Arc chute arrangement of a circuit breaker according to claim 1, characterized in that: still be provided with insulating barrier (4) between shielding plate (3) and opening (13), insulating barrier (4) on be provided with indentation (41) that are the horizontal direction, when the gaseous rush-out in explosion chamber (2), insulating barrier (4) upper end along indentation (41) outwards overturn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122604808.9U CN215955222U (en) | 2021-10-28 | 2021-10-28 | Arc extinguish chamber device of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122604808.9U CN215955222U (en) | 2021-10-28 | 2021-10-28 | Arc extinguish chamber device of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215955222U true CN215955222U (en) | 2022-03-04 |
Family
ID=80410955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122604808.9U Active CN215955222U (en) | 2021-10-28 | 2021-10-28 | Arc extinguish chamber device of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215955222U (en) |
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2021
- 2021-10-28 CN CN202122604808.9U patent/CN215955222U/en active Active
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