Arc extinguish chamber structure of circuit breaker

Abstract

The utility model discloses an arc extinguish chamber structure of a circuit breaker, comprising a body, the body is provided with at least two cavities, each cavity accommodates an arc extinguish grid sheet group, an insulating part is arranged between two adjacent cavities, the insulating part limits arc channeling of the two adjacent arc extinguish grid sheet groups, the insulating part is provided with a shielding part, and the shielding part isolates magnetic fields of the two adjacent cavities; the arc extinguishing structure is formed by the plurality of arc extinguishing grid sheet groups, so that the cutting arc extinguishing effect of the arc is improved, and secondly, the shielding part is arranged, so that the situation that the movement of the arc and the arc extinguishing effect are influenced due to interference of magnetic fields of two adjacent cavities in the using process is prevented.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, in particular to an arc extinguishing chamber structure of a circuit breaker. Background Art

[0002] In order to extinguish the arc, an arc extinguishing chamber is usually set in the circuit breaker. The arc extinguishing chamber uses arc extinguishing grids and gas-generating materials to extinguish the arc. However, with the development of new energy sources such as photovoltaics, the demand for direct current or high current in circuit breakers is increasing day by day. Conventional arc extinguishing chambers obviously cannot meet this demand. How to increase the arc extinguishing capacity of the arc extinguishing chamber on the existing basis has become a technical problem that technicians in this field need to solve urgently. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is how to increase the arc extinguishing capacity of the arc extinguishing chamber. To this end, an arc extinguishing chamber structure of a circuit breaker includes:

[0004] The main body is provided with at least two chambers, each of which accommodates an arc-extinguishing grid group, an insulating member is provided between two adjacent chambers, the insulating member limits arcing between two adjacent arc-extinguishing grid groups, and the insulating member is provided with a shielding part, which isolates the magnetic field of the two adjacent chambers.

[0005] It also includes a shielding component. The insulating component is provided with a fixing cavity. The shielding component is accommodated in the fixing cavity. The shielding component cooperates with the fixing cavity to form the shielding portion.

[0006] The shielding component is detachably connected to the fixing cavity.

[0007] The shielding member and the fixing cavity are integrally formed.

[0008] The insulating member is connected and fixed to the inner wall of the main body.

[0009] It also includes an equipotential grid, which is connected to two adjacent arc-extinguishing grid groups.

[0010] The arc extinguishing grid group includes a first longitudinal portion, a first transverse portion and a second longitudinal portion, two ends of the first transverse portion are respectively connected to the first longitudinal portion and the second longitudinal portion, and the equipotential grids are connected to the adjacent first longitudinal portion and the second longitudinal portion.

[0011] It also includes a gas production block, which is accommodated in the chamber and located below the arc extinguishing grid group.

[0012] The gas production block is provided with an isolation portion, the isolation portion extends toward the first transverse portion, and the isolation portion is located between the first longitudinal portion and the second longitudinal portion.

[0013] There are two gas generating blocks, which are arranged at intervals. A magnetizing component is fixed to the gas generating block, and the two magnetizing components are arranged on both sides of the motion track of the moving contact.

[0014] The gas production block and the body are connected by splicing, bolting or snap-on connection.

[0015] The technical solution of the utility model has the following advantages:

[0016] 1. The utility model provides an arc extinguishing chamber structure of a circuit breaker, which forms an arc extinguishing structure through a plurality of arc extinguishing grid groups, thereby improving the arc cutting and arc extinguishing effect. Secondly, the shielding part is set to prevent the magnetic fields of two adjacent chambers from interfering with each other during use, thereby affecting the movement of the arc and the arc extinguishing effect.

[0017] 2. The utility model provides a circuit breaker arc extinguishing chamber structure, wherein a shielding part is formed by accommodating a shielding member in a fixed cavity, thereby achieving a better shielding effect. The shielding member may be an iron sheet or other metal material to form an isolation between two adjacent magnetic fields.

[0018] 3. The utility model provides an arc extinguishing chamber structure of a circuit breaker, wherein the shielding member and the fixing cavity can be connected in a detachable manner to form a fixing effect, wherein the detachable manner can be a plug-in type or a receiving type fixing.

[0019] 4. The arc extinguishing chamber structure of a circuit breaker provided by the utility model is integrally formed, which makes processing more convenient. Here, the shielding part and the fixing cavity can be integrally injection molded.

[0020] 5. In the arc extinguishing chamber structure of a circuit breaker provided by the utility model, the insulating part is fixed by connecting with the body, thereby achieving a fixing effect and improving the stability of the insulating part.

[0021] 6. The utility model provides an arc extinguishing chamber structure for a circuit breaker. The arc extinguishing grid group adopts this structural arrangement to form an inverted U-shaped series circuit inside the chamber, thereby increasing the movement length of the arc and improving the arc extinguishing effect.

[0022] 7. The utility model provides an arc extinguishing chamber structure for a circuit breaker. The arrangement of the gas generating block generates arc extinguishing gas during the arc extinguishing process, thereby achieving a better arc extinguishing effect.

[0023] 8. The utility model provides an arc extinguishing chamber structure for a circuit breaker. The setting of the isolating part forms an isolation effect between the first longitudinal part and the second longitudinal part to prevent arcing. At the same time, the arc cooperates with the isolating part to produce arc extinguishing gas, which can better achieve the arc extinguishing effect.

[0024] 9. The utility model provides an arc extinguishing chamber structure for a circuit breaker. The arrangement of a magnetizing component forms a magnetic field, which can better achieve a magnetic blowing effect, so that the arc moves toward the arc extinguishing grid group, and can better achieve an arc extinguishing effect.

[0025] 10. The arc extinguishing chamber structure of a circuit breaker provided by the utility model forms a connection and fixing effect of the gas generating block by connecting the gas generating block with the body, thereby improving the stability between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of an arc extinguishing chamber of a circuit breaker provided by the utility model;

[0028] Figure 2 An exploded diagram of an arc extinguishing chamber structure of a circuit breaker provided by the utility model;

[0029] Figure 3 A cross-sectional view of an arc extinguishing chamber structure of a circuit breaker provided by the utility model;

[0030] Figure 4 The utility model provides a cross-sectional view of an arc extinguishing chamber structure of a circuit breaker.

[0031] Description of reference numerals:

[0032] 11. Main body; 12. Arc extinguishing grid group; 13. Insulating part; 14. Equipotential grid; 15. Shielding part; 16. Gas producing block; 17. Magnetizing part; 18. Arc striking plate; 111. Chamber; 121. First longitudinal part; 122. First transverse part; 123. Second longitudinal part; 131. Shielding part; 132. Fixed cavity; 161. Isolation part. DETAILED DESCRIPTION

[0033] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] Example 1

[0038] This embodiment provides an arc extinguishing chamber structure of a circuit breaker, as shown in the attached Figure 1-4 As shown, including:

[0039] The main body 11 is provided with at least two chambers 111, and the number of the chambers 111 can be adjusted according to actual needs. The lower end of the chamber 111 can cooperate with the moving contact, that is, the arc generated by the moving contact and the static contact enters the chamber 111 from the lower end to form an arc extinguishing effect. It can also be the upper end or side of the chamber 111. It is only necessary to ensure that the chamber 111 cooperates with the moving contact so that the generated arc enters the chamber 111. The cooperation orientation of the chamber 111 and the moving contact can be adjusted according to actual needs. Each chamber 111 accommodates an arc extinguishing grid group 12. The layout of the arc extinguishing grid group 12 can be adjusted according to actual needs. It can be arranged in an array with equal spacing, or in a U shape, or in an M shape. Those skilled in the art can adjust it according to actual needs.

[0040] An insulating member 13 is provided between two adjacent chambers 111, and the insulating member 13 limits arcing between two adjacent arc-extinguishing grid groups 12. When the arc passes through one arc-extinguishing grid group 12, the arc will not directly run from the middle of the arc-extinguishing grid group 12 to the adjacent arc-extinguishing grid group 12. The insulating member 13 is provided with a shielding portion 131, and the shielding portion 131 isolates the magnetic field of the two adjacent chambers 111. Here, the magnetic field in the chamber 111 can be an additional magnetic field, or it can be a magnetic field generated by the arc passing through the arc-extinguishing grid group 12, which is isolated by the shielding portion 131, thereby preventing interference between the two adjacent magnetic fields and affecting the magnetic blowing effect. The two adjacent chambers 111 are not completely separated, and the lower end of the connection between the two adjacent chambers 111 is connected. The arc can enter the adjacent chamber 111 through the connection, and the arc extinguishing effect is improved by multiple chambers 111.

[0041] The arc cutting and arc extinguishing effect of the arc is improved by using a plurality of arc extinguishing grid groups 12. Secondly, the shielding part 131 is provided to prevent the magnetic fields of two adjacent chambers 111 from interfering with each other during use, thereby affecting the movement of the arc and the arc extinguishing effect.

[0042] Specifically, as attached Figure 1-4 As shown, it also includes a shielding member 15, and the insulating member 13 is provided with a fixed cavity 132, and the shielding member 15 is accommodated in the fixed cavity 132. It should be noted here that the shielding member 15 is not electrically connected to the equipotential grid 14 or the arc extinguishing grid group 12, that is, the arc will not enter the fixed cavity 132. The shielding member 15 cooperates with the fixed cavity 132 to form a shielding portion 131. The shielding member 15 is accommodated in the fixed cavity 132 to form the shielding portion 131, so as to better achieve the shielding effect. Here, the shielding member 15 can be an iron sheet or other metal material to form an isolation between two adjacent magnetic fields. The number of shielding members 15 can be one or more, and those skilled in the art can adjust it according to actual needs. In addition, structures other than the shielding member 15 can also be used for insulation shielding, such as increasing the gap between the two chambers 111, or isolating the two adjacent chambers 111 through multiple insulating members 13.

[0043] Specifically, as attached Figure 1-4 As shown, the shielding member 15 is detachably connected to the fixed cavity 132. The shielding member 15 and the fixed cavity 132 can be detachably connected to form a fixing effect, and the detachable connection here can be a plug-in type or a accommodating type fixation. Specifically, the fixed cavity 132 is provided with an opening, and then the shielding member 15 is accommodated in the fixed cavity 132 through the opening, or the fixed cavity 132 can have two openings, and the shielding member 15 is accommodated in the fixed cavity 132. Here, when there is one opening, it can be considered that the opening is facing upward, and the shielding member 15 can be better accommodated in the fixed cavity 132 under the action of gravity.

[0044] Specifically, the shielding member 15 and the fixing cavity 132 are integrally formed. The integrally formed arrangement makes processing more convenient, and the shielding member 15 and the fixing cavity 132 can be integrally injection molded.

[0045] Specifically, as attached Figure 1-4 As shown, the insulating member 13 is connected and fixed to the inner wall of the body 11. The insulating member 13 is connected and fixed to the body 11, thereby achieving a fixing effect and improving the stability of the insulating member 13. The insulating member 13 and the body 11 can be connected by a snap connection, a riveted connection, an adhesive connection, or a bolt connection. In addition, the insulating member 13 can also be integrally formed by injection molding of the body 11, and then the shielding member 15 is inserted into the insulating member 13.

[0046] Specifically, as attached Figure 1-4 As shown, it also includes an equipotential grid 14, which is connected to two adjacent arc-extinguishing grid groups 12. Here, the equipotential grid 14 can cooperate with the upper ends of the two adjacent arc-extinguishing grid groups 12, and the equipotential grid 14 can also cooperate with the lower ends of the two adjacent arc-extinguishing grid groups 12. The equipotential grid 14 can also cooperate with the upper end of one of the arc-extinguishing grid groups 12 at one end, and the other end of the equipotential grid 14 can cooperate with the lower end of the adjacent arc-extinguishing grid group 12. Those skilled in the art can adjust according to actual needs. The equipotential grid 14 can be fitted and connected with the arc-extinguishing grid group 12, and the equipotential grid 14 can also be spaced apart from the arc-extinguishing grid group 12. When it is spaced apart, the arc can break through the gap and flow into the equipotential grid 14 or the adjacent arc-extinguishing grid group 12. Whether it is a fitted connection or a spaced arrangement, the electrical connection effect between the equipotential grid 14 and the adjacent arc-extinguishing grid group 12 can be achieved. In this embodiment, two adjacent arc extinguishing grid groups 12 are connected via an equipotential grid 14 to form a series circuit, which can lengthen the trajectory of the arc movement and improve the arc extinguishing effect.

[0047] Specifically, as attached Figure 1-4As shown, the arc-extinguishing grid group 12 includes a first longitudinal portion 121, a first transverse portion 122 and a second longitudinal portion 123. As shown in the accompanying drawings, the first longitudinal portion 121 is located in the left area of ​​the chamber 111, the first transverse portion 122 is located in the area near the top of the chamber 111, and the second longitudinal portion 123 is located in the right area of ​​the chamber 111, so that the first transverse portion 122 is formed with the first longitudinal portion 121 and the second longitudinal portion 123 connected at both ends, respectively, and the entire arc-extinguishing grid group 12 forms an approximately inverted U-shaped structure. Here, the arc-extinguishing grids of the first longitudinal portion 121 can be arranged horizontally with equal spacing, or can be arranged obliquely with equal spacing; the arc-extinguishing grids of the first transverse portion 122 are arranged vertically with equal spacing; the arc-extinguishing grids of the second longitudinal portion 123 can be arranged horizontally with equal spacing, or can be arranged obliquely with equal spacing, and those skilled in the art can adjust the number and angle of the arc-extinguishing grids according to actual needs. It should also be noted here that the number of arc-extinguishing grids in different arc-extinguishing grid groups 12 may be different, and those skilled in the art can increase or decrease according to actual needs. The equipotential grid 14 is connected to the adjacent first longitudinal portion 121 and the second longitudinal portion 123, that is, one end of the equipotential grid 14 cooperates with the lower end of the second longitudinal portion 123 of one of the arc-extinguishing grid groups 12, and the other end of the equipotential grid 14 cooperates with the lower end of the first longitudinal portion 121 of the adjacent arc-extinguishing grid group 12. The arc-extinguishing grid group 12 adopts this structural setting to form an inverted U-shaped series circuit inside the chamber 111, thereby increasing the movement length of the arc and improving the arc extinguishing effect. In this embodiment, the equipotential grid 14 is V-shaped. In addition, the equipotential grid 14 can also adjust the shape and the positional relationship with the arc-extinguishing grid group 12 according to actual needs.

[0048] Specifically, as attached Figure 1-4 As shown, it also includes a gas production block 16, which is accommodated in the chamber 111, and the gas production block 16 is located below the arc extinguishing grid group 12. The setting of the gas production block 16 allows arc extinguishing gas to be generated during the arc extinguishing process, which can better achieve the arc extinguishing effect. The shape and structure of the gas production block 16 can be adjusted according to actual needs. One gas production block 16 can be set for one chamber 111, one gas production block 16 can be set for multiple chambers 111, or multiple gas production blocks 16 can be set for multiple chambers 111. In this embodiment, two gas production blocks 16 arranged at intervals are set for two chambers 111, that is, one gas production block 16 is accommodated in two chambers 111, and the two gas production blocks 16 are symmetrically arranged. When the number of chambers 111 is three, the number of gas production blocks 16 can also be two, one gas production block 16 is accommodated in three chambers 111, and the other gas production block 16 is also accommodated in three chambers 111, and the two gas production blocks 16 are symmetrically arranged.

[0049] Specifically, as attached Figure 2-4As shown, the gas generating block 16 is provided with an isolation portion 161, which extends toward the first transverse portion 122 and is located between the first longitudinal portion 121 and the second longitudinal portion 123. The setting of the isolation portion 161 forms an isolation effect between the first longitudinal portion 121 and the second longitudinal portion 123 to prevent arcing. At the same time, the arc cooperates with the isolation portion 161 to generate arc extinguishing gas, which can better achieve the arc extinguishing effect.

[0050] Specifically, as attached Figure 2-4 As shown, there are two gas producing blocks 16, and the two gas producing blocks 16 are arranged at intervals, and a channel is formed between the two gas producing blocks 16. Here, the channel is the area where the moving contact rotates, so that the arc generated by the moving contact and the static contact can better enter the chamber 111. The gas producing block 16 is fixed with a magnetizing component 17, and the two magnetizing components 17 are arranged on both sides of the movement trajectory of the moving contact. The setting of the magnetizing component 17 forms a magnetic field, which can better play a magnetic blowing effect, so that the arc moves toward the arc extinguishing grid group 12, and the arc extinguishing effect can be better achieved. The magnetizing component 17 here can be a magnet or an iron material. When the magnetizing component 17 is made of iron, the generated arc can cooperate with the magnetizing component 17 to form a magnetic field. It should also be noted here that the two magnetizing components 17 are insulated and separated by the gas producing material, and no short circuit will occur between the two magnetizing components 17.

[0051] Specifically, as attached Figure 2-4 As shown, the gas generating block 16 is spliced, bolted, or snap-fitted to the body 11. The gas generating block 16 is connected to the body 11 to form a connection and fixation effect of the gas generating block 16, thereby improving the stability between the two.

[0052] Specifically, the lower end of the arc extinguishing grid group 12 is also equipped with an arc striking piece 18, and the arc striking piece 18 is used to cooperate with the moving contact and the static contact to form an arc striking effect.

[0053] Specifically, the body 11 is composed of three parts, and the three parts cooperate to form a plurality of chambers, namely, two parts at the bottom, a part arranged horizontally at the top, and the parts located at the top are respectively connected and fixed with the two parts located at the bottom, and the three parts can be connected by splicing, bolting, or snap-on connection. The number of parts here can also be two, and the two parts are spliced ​​left and right to form a plurality of chambers. It can also include a fixing plate, and two fixing plates, an arc-extinguishing grid plate group 12, and an equipotential grid plate 14 are connected and fixed to form a modular structure, and then the entire module is inserted into a plurality of chambers and fixed.

[0054] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. An arc extinguishing chamber structure of a circuit breaker, characterized in that: include: A body (11) is provided with at least two chambers (111), each chamber (111) containing an arc extinguishing grid plate group (12), an insulating member (13) is provided between two adjacent chambers (111), the insulating member (13) limits arcing between two adjacent arc extinguishing grid plate groups (12), and the insulating member (13) is provided with a shielding part (131), and the shielding part (131) isolates the magnetic field of the two adjacent chambers (111).

2. The arc extinguishing chamber structure of the circuit breaker according to claim 1, characterized in that: It also includes a shielding member (15), the insulating member (13) is provided with a fixed cavity (132), the shielding member (15) is accommodated in the fixed cavity (132), and the shielding member (15) cooperates with the fixed cavity (132) to form the shielding portion (131).

3. The arc extinguishing chamber structure of the circuit breaker according to claim 2, characterized in that: The shielding component (15) and the fixing cavity (132) are detachably connected; or the shielding component (15) and the fixing cavity (132) are integrally formed.

4. The arc extinguishing chamber structure of the circuit breaker according to claim 1, 2 or 3, characterized in that: The insulating member (13) is connected and fixed to the inner wall of the body (11).

5. The arc extinguishing chamber structure of the circuit breaker according to claim 1, characterized in that: It also comprises an equipotential grid (14), wherein the equipotential grid (14) is connected to two adjacent arc-extinguishing grid groups (12).

6. The arc extinguishing chamber structure of the circuit breaker according to claim 5, characterized in that: The arc extinguishing grid group (12) comprises a first longitudinal portion (121), a first transverse portion (122) and a second longitudinal portion (123); two ends of the first transverse portion (122) are respectively connected to the first longitudinal portion (121) and the second longitudinal portion (123); and the equipotential grid (14) is connected to adjacent first longitudinal portions (121) and second longitudinal portions (123).

7. The arc extinguishing chamber structure of the circuit breaker according to claim 6, characterized in that: It also comprises a gas production block (16), wherein the gas production block (16) is accommodated in the chamber (111), and the gas production block (16) is located below the arc extinguishing grid plate group (12).

8. The arc extinguishing chamber structure of the circuit breaker according to claim 7, characterized in that: The gas generating block (16) is provided with an isolation portion (161), the isolation portion (161) extending toward the first transverse portion (122), and the isolation portion (161) is located between the first longitudinal portion (121) and the second longitudinal portion (123).

9. The arc extinguishing chamber structure of the circuit breaker according to claim 7 or 8, characterized in that: The number of the gas generating blocks (16) is two, and the two gas generating blocks (16) are arranged at intervals. The gas generating blocks (16) are fixed with magnetizing components (17), and the two magnetizing components (17) are arranged on both sides of the movement track of the moving contact.

10. The arc extinguishing chamber structure of the circuit breaker according to claim 7 or 8, characterized in that: The gas production block (16) and the body (11) are spliced, bolted, or snap-fitted.

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