CN-122000221-A - Switch

CN122000221ACN 122000221 ACN122000221 ACN 122000221ACN-122000221-A

Abstract

The application discloses a switch which comprises a shell, wherein at least one breaking space is arranged in the shell, a first contact, a second contact and an arc extinguishing grid sheet group are arranged in each breaking area, the first contact and the second contact are in a separated first state and a contacted second state, the breaking space comprises an arc generating area used for accommodating the first contact and the second contact, a grid sheet accommodating area used for accommodating the arc extinguishing grid sheet group and positioned below the arc generating area in a first direction, a first exhaust channel and a second exhaust channel are respectively arranged on two sides of the arc extinguishing grid sheet group in a second direction and are communicated with the outside, the first exhaust channel is closer to the arc generating area relative to the second exhaust channel, at least one part of the first exhaust channel is of a narrow-mouth structure, the caliber of the narrow-mouth structure is smaller than that of any position of the second exhaust channel, and the first direction is perpendicular to the second direction.

Inventors

ZHAN LIYING
GAO XIANG
SUN LIANGQUAN
Lei Shaoxian
CHANG ZHIQIANG
LIU YI

Assignees

浙江天正电气股份有限公司
上海芯上科电器科学研究有限公司

Dates

Publication Date: 20260508
Application Date: 20260330

Claims (10)

1. A switch is a breaker or a disconnecting switch, which comprises a shell, wherein at least one breaking space is arranged in the shell, a first contact, a second contact and an arc extinguishing grid sheet group are arranged in each breaking area, the first contact and the second contact have a separated first state and a contacted second state, and the switch is characterized in that the breaking space comprises, An arc generating region for accommodating the first contact and the second contact; A grid sheet accommodation area for accommodating the arc extinguishing grid sheet group and positioned below the arc generation area in the first direction; the first exhaust channel and the second exhaust channel are respectively arranged at two sides of the arc extinguishing grid sheet group in the second direction and all communicate the grid sheet accommodating area with the outside; The first exhaust passage is closer to the arc generating area than the second exhaust passage, and at least one part of the first exhaust passage is of a narrow-mouth structure; The caliber of the narrow-mouth structure is smaller than the caliber of any position of the second exhaust passage; The first direction is perpendicular to the second direction.
2. A switch as in claim 1 wherein the slot structure is constructed solely from the housing; alternatively, the slot structure is constructed from a housing and a blocking member secured to the housing.
3. A switch as set forth in claim 1, wherein the arc chute sheet comprises an arc chute sheet housing, the arc chute sheet is fixed to the arc chute sheet housing, the arc chute sheet housing defines a first opening and a second opening, the first opening is a portion of the first exhaust passage, the second opening is a portion of the second exhaust passage, and the slot structure is configured by a housing or the slot structure is configured by the housing and the first opening together, or the slot structure is the first opening.
4. A switch as in claim 1 wherein the narrow opening structure is a single hole structure; the narrow opening structure is a porous structure, the number of the holes is N,1<N is less than or equal to 5, and the caliber is the sum of all the holes.
5. A switch according to claim 1, wherein the aperture of the narrow opening structure is R1, and the aperture of the smallest aperture of the second exhaust passage is R2, 0.2R2≤R1≤ 0.8R2.
6. The switch of claim 1, wherein the first exhaust passage is of a narrow-mouth structure, and the caliber of any position of the first exhaust passage is smaller than that of any position of the second exhaust passage; Or, the part of the first exhaust passage is of a narrow-mouth structure, and the caliber of the narrow-mouth structure is smaller than that of the rest parts of the first exhaust passage.
7. A switch as in claim 1, wherein at least one layer of filter structures is disposed in each of the first and second exhaust passages, and the number of filter structures in the second exhaust passage is no greater than the number of filter structures in the first exhaust passage; Or/and, at least one layer of filtering structure is arranged in each of the first exhaust channel and the second exhaust channel, and the narrow-mouth structure in the first exhaust channel is closer to the arc extinguishing grid sheet group than the filtering structure.
8. A switch as set forth in claim 1, wherein said first exhaust passage comprises a first exhaust port communicating with the outside, a first air inlet connected to the gate receiving area, an intermediate area between the first exhaust port and the first air inlet, and a narrow port structure provided at the first exhaust port or the first air inlet or the intermediate area; and/or the caliber of at least two parts of the second exhaust passage is different.
9. A switch according to claim 1, wherein the arc extinguishing gate group comprises a first gate cluster and a second gate cluster, the first exhaust channel and the second gate cluster are positioned at two sides of the first gate cluster in the second direction, the second exhaust channel is positioned at one side of the second gate cluster far away from the first gate cluster, gate feet of arc extinguishing gate parts in the first gate cluster extend to an arc generating area, or the total length of the second gate cluster in the second direction is larger than the total length of the first gate cluster in the second direction, or the number of arc extinguishing gate parts in the second gate cluster is larger than the number of arc extinguishing gate parts in the first gate cluster.
10. The switch of claim 9, wherein the arc extinguishing bars in the second bar cluster are sequentially arranged along the preset direction, the inclination angle of each arc extinguishing bar relative to the first direction is not more than 20 degrees, the inclination angle of each arc extinguishing bar is different, and the inclination angle of the arc extinguishing bar is larger when the arc extinguishing bar is closer to the second exhaust passage; or, each arc-extinguishing grid sheet in the second grid sheet cluster is obliquely arranged and forms an included angle with the first direction, each arc-extinguishing grid sheet in the first grid sheet cluster is obliquely arranged and forms an included angle with the first direction, and the inclination degree of each arc-extinguishing grid sheet in the second grid sheet cluster is greater than that of each arc-extinguishing grid sheet in the first grid sheet cluster; Or, the first grid sheet cluster comprises a first grid sheet sub-cluster and a second grid sheet sub-cluster, the first grid sheet sub-cluster is close to the first exhaust channel, the second grid sheet sub-cluster is close to the second grid sheet cluster, the arc-extinguishing grid sheets in the first grid sheet sub-cluster and the arc-extinguishing grid sheets in the second arc-extinguishing grid sheet sub-cluster are obliquely arranged, the oblique directions of the arc-extinguishing grid sheets and the arc-extinguishing grid sheets are opposite, and the oblique degree of each arc-extinguishing grid sheet of the first grid sheet sub-cluster is smaller than that of each arc-extinguishing grid sheet in the second arc-extinguishing grid sheet sub-cluster.

Description

Switch Technical Field The application relates to the field of low-voltage electricity, in particular to a switch, in particular to a circuit breaker or an isolating switch. Background The plastic shell switch is a common switch in the field of low voltage power supply and is used for overload and short-circuit protection of a circuit in a circuit. The arc extinguishing chamber and the contact of the conventional molded case circuit breaker are arranged along the length direction, and the shell of the molded case circuit breaker is also provided with a corresponding exhaust hole along which arc gas can be exhausted. With the increasing performance requirements of the molded case circuit breaker, the conventional molded case circuit breaker scheme at present is not suitable for the high voltage scene. Thus, the art has devised a new plastic case circuit breaker solution with contacts located above the arc chute in the height direction, which has a large arc chute space and thus can accommodate a very large number of arc chute blades. However, the increase in the number of arc chute sheets does not necessarily represent an adequate utilization of the arc chute sheets. Therefore, how to set up a novel molded case circuit breaker scheme with more reasonable air passages and fully utilize the arc extinguishing grid plates to carry out arc extinguishing becomes another problem. Disclosure of Invention In view of the above, the present application aims to overcome the defects in the prior art, and aims to provide a switch. The application provides a switch, which comprises a shell, wherein at least one breaking space is arranged in the shell, a first contact, a second contact and an arc extinguishing grid sheet group are arranged in each breaking area, the first contact and the second contact have a separated first state and a contacted second state, wherein the breaking space comprises, An arc generating region for accommodating the first contact and the second contact; A grid sheet accommodation area for accommodating the arc extinguishing grid sheet group and positioned below the arc generation area in the first direction; the first exhaust channel and the second exhaust channel are respectively arranged at two sides of the arc extinguishing grid sheet group in the second direction and all communicate the grid sheet accommodating area with the outside; The first exhaust passage is closer to the arc generating area than the second exhaust passage, and at least one part of the first exhaust passage is of a narrow-mouth structure; The caliber of the narrow-mouth structure is smaller than the caliber of any position of the second exhaust passage; The first direction is perpendicular to the second direction. In some embodiments of the application, the slot structure is constructed solely from the housing. In some embodiments of the application, the slot structure is constructed from a housing and a barrier secured to the housing. In some embodiments of the present application, the arc chute sheet set includes an arc chute sheet housing, the arc chute sheet set is fixed on the arc chute sheet housing, the arc chute sheet housing is provided with a first opening and a second opening, the first opening is a part of the first exhaust channel, the second opening is a part of the second exhaust channel, the narrow opening structure is constructed by a housing, or the narrow opening structure is constructed by the housing and the first opening together, or the narrow opening structure is the first opening. In some embodiments of the application, the narrow mouth structure is a single hole structure. In some embodiments of the application, the narrow-mouth structure is a porous structure, the number of holes is N, 1<N≤5, and the caliber is the sum of all the holes. In some embodiments of the application, the aperture of the narrow-mouth structure is R1, and the aperture at the minimum aperture in the second exhaust passage is R2, 0.2R2≤R1≤ 0.8R2. In some embodiments of the present application, the first exhaust passage is entirely of a narrow-mouth structure, and the aperture at any position thereof is smaller than the aperture at any position of the second exhaust passage. In some embodiments of the application, the portion of the first exhaust passage is a narrow mouth structure having a smaller caliber than the remainder of the first exhaust passage. In some embodiments of the application, at least one layer of filter structures is disposed in each of the first and second exhaust passages, and the number of filter structures in the second exhaust passage is no greater than the number of filter structures in the first exhaust passage. In some embodiments of the present application, at least one layer of filter structure is disposed in each of the first and second exhaust channels, and the narrow-mouth structure in the first exhaust channel is closer to the arc chute sheet group than the filter structure. In some embodimen