Arc extinguish chamber of circuit breaker

Abstract

The utility model relates to an arc extinguish chamber of a circuit breaker. Comprising a deionization device, a partition plate, an insulating part, an integrated U-shaped support and arc extinguishing grid pieces, the integrated U-shaped support comprises a U-shaped connecting piece, a first U-shaped side wall and a second U-shaped side wall, a cavity is formed in the U-shaped connecting piece, a plurality of cavity bosses are arranged on the left side and the right side of the cavity, and the first U-shaped side wall and the second U-shaped side wall are in bilateral symmetry and connected to the two sides of the U-shaped connecting piece; a plurality of parallel side wall bosses are arranged on the inner walls of the two U-shaped side walls, and channels are formed between the side wall bosses; two protrusions are arranged at one end of each arc extinguishing grid piece in a bilateral symmetry mode and are horizontally installed in a channel formed by the bosses of the two U-shaped side walls. The arc extinguish chamber is provided with the integrated U-shaped support, the integrated U-shaped support is formed through a mold, the number of parts is small, the production cost is low, riveting or additional tool clamps are not needed in the installation process, the assembly cost is reduced, and the assembly efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker technical field, in particular to a circuit breaker's arc extinguishing chamber. BACKGROUND

[0002] The circuit breaker is widely used in low-voltage distribution system, and its carrying current is large and protection range is comprehensive, and is generally used as main switch in distribution system and is directly used as line protection switch in wind power system.

[0003] When the fault current appears in the system, the circuit breaker controller triggers the operating mechanism to drive the movable contact to open rapidly, and the arc is generated between the movable contact and the static contact, so that the movable contact, the static contact and the arc extinguishing chamber form a contact arc extinguishing system, the arc is transferred, divided, cooled and deionized by the arc leading piece, the grid piece and other components of the arc extinguishing chamber, and finally the arc is extinguished.

[0004] At present, the circuit breaker arc extinguishing chamber generally adopts multiple grid pieces riveted on the left and right side plates, and the riveting structure is rigidly connected with the air outlet components through screws or buckles; or the arc leading piece, the grid piece and the air outlet components are accommodated by the support of the left and right side splicing structure. The above-mentioned scheme has many arc extinguishing chamber components and complicated process, and the assembly needs the help of tool clamps, which is time-consuming and laborious. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the defects of prior art and provides a circuit breaker arc extinguishing chamber, which has an integrated U-shaped support, fewer components, does not need riveting or additional tool clamps during installation, reduces assembly cost and improves assembly efficiency.

[0006] According to the utility model, the arc extinguishing chamber of the circuit breaker is provided, which comprises a deionization device, a partition plate, an insulating part, an integrated U-shaped support and arc extinguishing grid pieces, the integrated U-shaped support comprises a U-shaped connecting piece, a U-shaped side wall one and a U-shaped side wall two, the U-shaped connecting piece has a cavity inside, a plurality of cavity bosses are arranged on the left and right sides of the cavity, the U-shaped side wall one and the U-shaped side wall two are symmetrically arranged on the left and right sides of the U-shaped connecting piece, a plurality of parallel side wall bosses are arranged on the inner walls of the U-shaped side wall one and the U-shaped side wall two, channels are formed between the plurality of side wall bosses, and the integrated U-shaped support is formed by a mold; the arc extinguishing grid pieces are symmetrically provided with two protrusions at one end, and the arc extinguishing grid pieces are horizontally installed in the channels formed by the plurality of side wall bosses; the deionization device is installed in the cavity of the U-shaped connecting piece, and the partition plate is installed on the cavity boss.

[0007] Preferably, the thickness of the boss plus the thickness of the partition plate is equal to the thickness of the cavity.

[0008] As preferred, a plurality of insulation piece mounting holes are arranged on the outer wall of the U-shaped side wall one and the U-shaped side wall two.

[0009] As preferred, a plurality of side wall air outlet holes are arranged on the side wall of the U-shaped side wall one and the U-shaped side wall two.

[0010] As preferred, a plurality of bottom plate air outlet holes are arranged on the bottom plate of the U-shaped connecting piece.

[0011] As preferred, the partition plate is in a rectangular structure, and a plurality of partition plate air outlet holes are arranged on the partition plate.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The arc-extinguishing chamber has an integrated U-shaped support which is formed by a mold, has few parts, has low production cost, does not need riveting or additional fixtures during installation, reduces assembly cost and improves assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A circuit breaker arc-extinguishing chamber structure diagram is provided for the utility model.

[0015] Figure 2 A deionization structure assembly drawing is provided for the utility model.

[0016] Figure 3 An integrated U-shaped support structure diagram is provided for the utility model.

[0017] Figure 4 A partition plate structure diagram is provided for the utility model.

[0018] Figure 5 An arc-extinguishing grid structure diagram is provided for the utility model.

[0019] Figure 6 An assembly explosion diagram is provided for the utility model.

[0020] Illustration: 1, integrated U-shaped support; 2, partition plate; 3, arc-extinguishing grid, 4, insulation piece; 5, deionization device; 11, U-shaped side wall one; 12, U-shaped side wall two; 13, U-shaped connecting piece; 21, partition plate air outlet hole; 11-1, U-shaped side wall one air outlet hole; 11-2, U-shaped side wall one insulation piece mounting hole; 12-1, U-shaped side wall two air outlet hole, 12-2, insulation piece mounting hole; 12-3, side wall boss; 13-1, U-shaped connecting piece bottom plate; 13-2, U-shaped connecting piece bottom plate fixing place; 13-3, chamber; 13-31, chamber boss; 13-11, bottom plate air outlet hole; 3-1, protrusion. DETAILED DESCRIPTION

[0021] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit and scope of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application. It should be understood that the descriptions of the present application are merely intended to help understand the principles of the present application, and should not be used to restrict the scope of the present application.

[0022] In the description of the present application, it should be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0023] In addition, if these terms "first", "second" appear, these terms are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features referred to. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0024] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be interpreted broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] In the present application, unless specifically stated and limited otherwise, if there is a description of a first feature "on" or "under" a second feature, etc., it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "on", "above" and "over" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0026] It should be noted that if an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0027] Referring to Figures 1-6 , Figure 1 A schematic diagram of the arc-extinguishing chamber structure of a circuit breaker in an embodiment of the present application is shown, which includes an integrated U-shaped support 1, arc-extinguishing grid 3, deionization device 5, partition plate 2 and insulating member 4. The integrated U-shaped support includes U-shaped connecting member 13, U-shaped side wall one 11 and U-shaped side wall two 12. As shown in Figure 2 The U-shaped connecting member 13 has a cavity 13-3 inside, which is used to install and arrange the deionization device 5. Chamber bosses 13-31 of a certain thickness are arranged on the left and right sides of the cavity 13-3. The partition plate 2 is installed on the chamber bosses 13-31. The thickness of the chamber bosses 13-31 plus the thickness of the partition plate 2 is equal to the thickness of the cavity 13-3. After the partition plate 2 is put in, it is flush with the outlet of the cavity.

[0028] As Figure 3As shown, U-shaped sidewall 11 and U-shaped sidewall 2 12 are symmetrical about left and right and are connected to both sides of U-shaped connector 13. The width of the two sidewalls is smaller than the width of the U-shaped connector base plate fixing point 13-2. Several parallel sidewall protrusions 12-3 are provided on the inner walls of U-shaped sidewall 11 and U-shaped sidewall 2 12. A channel is formed between the protrusions 12-3. The arc extinguishing grid plate 3 is horizontally installed in the channel formed by the protrusions 12-3 of U-shaped sidewall 11 and U-shaped sidewall 2 12. Several insulating component mounting holes 11-2 and 12-2 are provided on the outer walls of U-shaped sidewall 11 and U-shaped sidewall 2 12. These holes are used to rigidly connect the insulating component 4. Several bottom plate vent holes 13-11 are provided on the bottom plate of the U-shaped connector, and several side wall vent holes 11-1 and 12-1 are provided on the side walls of U-shaped sidewall 11 and U-shaped sidewall 2 12. The gas treated by the deionization device 5 is discharged from the arc extinguishing chamber through the vent holes.

[0029] like Figure 4 As shown, the partition 2 is a rectangular structure with several partition vents 21 for discharging the gas treated by the deionization device 5.

[0030] like Figure 5 As shown, two protrusions 3-1 are symmetrically arranged on the left and right sides of one end of the arc-extinguishing grid plate 3. After the arc-extinguishing grid plate 3 is installed, the protrusions 3-1 abut against the partition plate 2.

[0031] like Figure 6 As shown, Figure 6 An exploded view of the assembly in one embodiment of this utility model is shown. During assembly, the ion-extinguishing device 5 is first arranged in the chamber 13-3 inside the integrated U-shaped bracket 1; the partition 2 is placed on the chamber bosses 13-31 on the left and right sides of the chamber 13-3; then, several arc-extinguishing grid plates 3 are inserted from the channel formed by the two U-shaped side wall bosses 12-3 until the protrusions 3-1 of the arc-extinguishing grid plates 3 abut against the partition; finally, the insulating member 4 is rigidly connected to the insulating member mounting holes 11-2 and 12-2 on the two side walls to fix the arc-extinguishing grid plates 3 and the gas that generates the cooling arc. At this time, one side wall of the insulating member 4 is close to the arc-extinguishing grid plate 3 to prevent the arc-extinguishing grid plate 3 from sliding out of the channel.

[0032] The integrated U-shaped bracket 1 of this utility model is formed by mold, and the strength of the finished part meets the requirements for use.

[0033] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An arc chute of a circuit breaker comprising a deionization device, a baffle and an insulating member, characterized in that, The integrated U-shaped support and the arc extinguishing grid are also included, The integrated U-shaped support comprises a U-shaped connecting piece, a U-shaped side wall one and a U-shaped side wall two, the U-shaped connecting piece has a cavity inside, a plurality of cavity bosses are arranged on the left and right sides of the cavity, the U-shaped side wall one and the U-shaped side wall two are symmetrically arranged on the two sides of the U-shaped connecting piece, a plurality of parallel side wall bosses are arranged on the inner walls of the U-shaped side wall one and the U-shaped side wall two, channels are formed between the side wall bosses, and the integrated U-shaped support is formed by a mold; The arc extinguishing grid is horizontally installed in the channels formed by the plurality of side wall bosses, and two protrusions are symmetrically arranged on one end of the arc extinguishing grid. The ionization elimination device is installed in the cavity of the U-shaped connecting piece, and the partition plate is installed on the cavity boss.

2. An arc chute for a circuit breaker according to claim 1, wherein The thickness of the boss plus the thickness of the partition plate is equal to the thickness of the cavity.

3. An arc chute for a circuit breaker according to claim 1, wherein A plurality of insulating piece installation holes are arranged on the outer walls of the U-shaped side wall one and the U-shaped side wall two.

4. The arc chute of claim 1 wherein, A plurality of side wall air outlet holes are arranged on the side walls of the U-shaped side wall one and the U-shaped side wall two.

5. The arc chute of claim 1 wherein, A plurality of bottom plate air outlet holes are arranged on the bottom plate of the U-shaped connecting piece.

6. An arc chute for a circuit breaker according to claim 1, wherein The partition plate has a rectangular structure, and a plurality of partition plate air outlet holes are arranged thereon.

Images