Arc extinguishing system for rotary disconnecting switch

Abstract

The utility model relates to an arc extinguishing system for a rotary disconnecting switch, which comprises a top plate, a bottom plate and an arc extinguishing grid group arranged between the top plate and the bottom plate. An arc extinguishing channel for a moving contact to pass through is formed in the front side of the arc extinguishing grid sheet group, a magnetic blow-out chamber is formed in the rear side of the arc extinguishing grid sheet group, the magnetic blow-out chamber is back to the arc extinguishing channel, at least one magnetic block is arranged in the magnetic blow-out chamber, and an insulating part is arranged between the magnetic block and the arc extinguishing grid sheet. The magnetic blow-out chamber is arranged in the arc extinguishing grid sheet group, the magnetic blow-out chamber is directly back to the arc extinguishing channel, the design effectively utilizes the space of the arc extinguishing system, the magnetic block additionally occupies the control position of the arc extinguishing system, the layout is more reasonable, the magnetic block is back to the arc extinguishing channel, the magnetic blow-out is more ideal, and the arc extinguishing performance is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage equipment, and particularly relates to an arc extinguishing system for a rotary disconnector. Background Art

[0002] In a rotary disconnector, it includes an operating mechanism and a conductive device. The conductive device includes a moving contact, a static contact, and an arc extinguishing system. During the operation, when the moving contact and the static contact are disconnected, an arc will be generated, and the arc extinguishing system cuts these arcs to extinguish the arc.

[0003] Currently, the principle of the arc extinguishing system in the market is to cut the arc through the arc extinguishing grid sheets distributed at intervals. To enhance the arc extinguishing effect, magnetic blocks are added to the arc extinguishing system, and the magnetic blowing force generated by the magnetic blocks is used to blow the arc into the arc extinguishing grid sheets. However, the magnetic blocks in the current arc extinguishing system are all arranged on the periphery of the arc extinguishing grid sheet group. For example, in the prior patent CN218482184U, the arc extinguishing chamber and the circuit breaker, in this patent, the magnetic blocks are arranged on the side of the arc extinguishing grid sheet group. Another example is CN218160253U, the arc extinguishing chamber and the circuit breaker, in this patent, the magnetic blocks are arranged at the static contact. In the past, the arrangement of the magnetic blocks in the arc extinguishing system was relatively unreasonable. Although it could achieve a certain magnetic blowing effect, the effect was not ideal. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and provide an arc extinguishing system for a rotary disconnector, so as to solve the problem that the unreasonable arrangement of the magnetic block position in the previous arc extinguishing system leads to an unsatisfactory magnetic blowing effect.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] Provide an arc extinguishing system for a rotary disconnector, including

[0007] a top plate, a bottom plate, and an arc extinguishing grid sheet group, and the arc extinguishing grid sheet group is arranged between the top plate and the bottom plate;

[0008] An arc extinguishing channel for the moving contact to pass through is opened on the front side of the arc extinguishing grid sheet group, a magnetic blowing chamber is opened on the rear side of the arc extinguishing grid sheet group, the magnetic blowing chamber is back to back with the arc extinguishing channel, and at least one magnetic block is arranged in the magnetic blowing chamber, and an insulating part is arranged between the magnetic block and the arc extinguishing grid sheet.

[0009] Furthermore, a pair of arc guiding sheets are also arranged between the top plate and the bottom plate, and the two arc guiding sheets are respectively located on both sides of the arc extinguishing grid sheet group.

[0010] Furthermore, the arc guiding sheet includes a sheet body and an arc guiding folding edge, the arc guiding folding edge is located on one side of the arc extinguishing channel, and the arc guiding folding edge is bent outwards.

[0011] Further, the insulating member includes an upper insulating cover and a lower insulating cover. At least one receiving groove is formed in both the upper insulating cover and the lower insulating cover. When the upper insulating cover and the lower insulating cover are combined, the upper and lower receiving grooves form a receiving cavity, and the magnetic block is placed in the receiving cavity.

[0012] Further, the magnetic blow chamber transversely penetrates the entire arc extinguishing grid plate group.

[0013] Further, the arc extinguishing system is arranged in the casing of the conductive device, and the casing includes

[0014] an upper casing and a lower casing. An upper positioning groove is formed on the inner wall of the upper casing, and a lower positioning groove is formed on the inner wall of the lower casing. The upper positioning groove is adapted to cooperate with the top plate, and the lower positioning groove is adapted to cooperate with the bottom plate.

[0015] Further, limit blocks are arranged on the inner walls of both the upper casing and the lower casing. The limit blocks are adapted to abut against the insulating member, thereby restricting the magnetic block in the magnetic blow chamber.

[0016] The beneficial effects of the present utility model are as follows:

[0017] By providing a magnetic blow chamber in the arc extinguishing grid plate group, the magnetic blow chamber directly backs on the arc extinguishing channel. This design effectively utilizes the space of the arc extinguishing system. The magnetic block additionally occupies the control position of the arc extinguishing system, and the layout is more reasonable. Secondly, with the magnetic block backing on the arc extinguishing channel, the magnetic blow is more ideal, and the arc extinguishing performance is greatly improved.

[0018] The magnetic block is installed at the rear side of the arc extinguishing grid plate group. When the arc extinguishing system is installed in the casing of the conductive device, the casing positions the arc extinguishing system through the upper and lower positioning grooves, and the magnetic block is restricted by the limit blocks. The installation structure is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present utility model will be further described below with reference to the accompanying drawings.

[0020] Figure 1 and Figure 2 are schematic diagrams of the arc extinguishing system for a rotary disconnector of the present utility model;

[0021] Figure 3 is a schematic diagram of a single arc extinguishing grid plate;

[0022] Figure 4 is a schematic diagram of the insulating member;

[0023] Figure 5 is a half-sectional view of the insulating member;

[0024] Figure 6 is a schematic diagram of the conductive device;

[0025] Figure 7 is a schematic diagram of the lower casing in the conductive device;

[0026] Among them,

[0027] 1. The housing, 11. The moving contact, 12. The static contact, 13. The rotating shaft, 14. The lower housing;

[0028] 2. The arc extinguishing system, 21. The top plate, 22. The bottom plate;

[0029] 3. The arc extinguishing grid group, 31. The arc extinguishing channel, 32. The magnetic blow chamber; 3A. The arc extinguishing grid;

[0030] 4. The arcing piece, 41. The arcing flange;

[0031] 5. The insulating part, 51. The upper insulating cover, 52. The lower insulating cover;

[0032] 6. The magnetic block;

[0033] 71. The lower positioning groove, 72. The limiting block. Specific implementation manners

[0034] To make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] The present application provides an arc extinguishing system for a rotary disconnector, which will be described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. And in the following embodiments, each embodiment has its own emphasis. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0036] To solve the technical problem in the prior art that the position arrangement of the magnetic block 6 in the arc extinguishing system 2 is unreasonable, resulting in an unsatisfactory magnetic blow effect, an embodiment of the present application provides an arc extinguishing system for a rotary disconnector. The following is a detailed elaboration.

[0037] As Figures 1 to 5 shown, an arc extinguishing system for a rotary disconnector includes

[0038] a top plate 21, a bottom plate 22 and an arc extinguishing grid group 3, and the arc extinguishing grid group 3 is arranged between the top plate 21 and the bottom plate 22;

[0039] An arc extinguishing channel 31 for the moving contact 11 to pass through is formed at the front side of the arc extinguishing grid group 3. A magnetic blowout chamber 32 is formed at the rear side of the arc extinguishing grid group 3. The magnetic blowout chamber 32 is adjacent to the arc extinguishing channel 31. At least one magnetic block 6 is arranged in the magnetic blowout chamber 32. An insulating member 5 is arranged between the magnetic block 6 and the arc extinguishing grid 3A.

[0040] The arc extinguishing grid group 3 is composed of a plurality of arc extinguishing grid groups 3. As Figure 3 shown, openings are formed at both the front and rear ends of the arc extinguishing grid 3A. The front opening corresponds to the arc extinguishing channel 31, and the rear opening corresponds to the magnetic blowout chamber 32. The arc extinguishing grid 3A is a metal part formed by stamping. Clamping blocks are arranged at both the upper and lower ends of the arc extinguishing grid 3A. The arc extinguishing grid 3A is clamped to the top plate 21 and the bottom plate 22 respectively through the clamping blocks.

[0041] Specifically, as an alternative implementation in this embodiment, as Figure 2 shown, a pair of arc guiding sheets 4 are further arranged between the top plate 21 and the bottom plate 22. The two arc guiding sheets 4 are respectively located on both sides of the arc extinguishing grid group 3.

[0042] The arc guiding sheets 4 are also installed between the top plate 21 and the bottom plate 22 by means of clamping blocks.

[0043] As Figure 2 shown, the arc guiding sheet 4 includes a sheet body and an arc guiding folding edge 41. The arc guiding folding edge 41 is located on one side of the arc extinguishing channel 31, and the arc guiding folding edge 41 is bent outwards.

[0044] The arc on the moving contact rod can be guided to the arc extinguishing grid group 3 through the arc guiding folding edge 41.

[0045] In this embodiment, the magnetic blowout chamber 32 transversely penetrates the entire arc extinguishing grid group 3. Through this structure, the magnetic blowing range of the magnetic block 6 in the arc extinguishing grid group 3 is expanded, and the arc extinguishing performance of the entire arc extinguishing system 2 is improved.

[0046] Specifically, as an alternative implementation in this embodiment, as Figure 4 Figure 5 shown, the insulating member 5 includes an upper insulating cover 51 and a lower insulating cover 52. Two receiving grooves are formed in both the upper insulating cover 51 and the lower insulating cover 52. When the upper insulating cover 51 and the lower insulating cover 52 are combined, the upper and lower receiving grooves form a receiving cavity, and the magnetic block 6 is placed in the receiving cavity.

[0047] The insulating member 5 with this structure can stably wrap the magnetic block 6 to prevent the magnetic block 6 from directly contacting the arc extinguishing grid 3A. At the same time, this structure of the insulating member 5 also facilitates the installation of the magnetic block 6 into the arc extinguishing grid group 3.

[0048] As Figure 6 Figure 7The conductive device shown includes a housing 1, a rotating shaft 13, a moving contact 11, a pair of arc extinguishing systems 2, and a static contact 12. The housing 1 includes an upper housing and a lower housing 14. The moving contact 11 is installed on the rotating shaft 13, and the static contact 12 and the arc extinguishing system 2 are installed in the housing.

[0049] The rotating shaft 13 drives the moving contact 11 to rotate in the middle of the housing 1. The arc extinguishing systems 2 are installed on both sides of the housing 1, and the two static contacts 12 are respectively located on both sides of the housing 1. The two sides of the arc extinguishing system 2 are respectively the closing position and the opening position of the conductive device, and one side of the static contact 12 is the closing position.

[0050] An upper positioning groove is formed on the inner wall of the upper housing, and a lower positioning groove 71 is formed on the inner wall of the lower housing 14. The upper positioning groove is adapted to cooperate with the top plate 21, and the lower positioning groove 71 is adapted to cooperate with the bottom plate 22.

[0051] When the arc extinguishing system 2 is installed in the housing 1, it is clamped between the top plate 21 and the bottom plate 22 through the upper and lower positioning grooves to fix its position in the housing 1.

[0052] Specifically, as an optional implementation manner in this embodiment, limiting blocks 72 are provided on the inner walls of the upper housing and the lower housing 14. The limiting blocks 72 are adapted to abut against the insulating member 5, thereby restricting the magnetic block 6 in the magnetic blow chamber 32.

[0053] As Figure 6 described, after the housing 1 is assembled, the limiting block 72 provided on the inner side wall of the lower housing 14 abuts against the rear side of the insulating member 5 to restrict the insulating member 5 from moving backward, and the left and right positions of the insulating member 5 are limited by the arc guiding piece 4.

[0054] For the arc extinguishing system of the rotary disconnector of the present invention, the magnetic block 6 is installed in the magnetic blow chamber 32 behind the arc extinguishing grid group 3. In this way, the installation of the magnetic block 6 in the arc extinguishing system 2 will not additionally occupy the position of the arc extinguishing system. And because the magnetic block 6 is inside the arc extinguishing grid group 3, the magnetic blow effect is better. The magnetic blow force can disperse the arc in the arc extinguishing grid group 3, so that the arc can quickly and comprehensively enter the arc extinguishing grid group 3, improving the arc guiding ability and facilitating arc extinction. While optimizing the installation structure of the magnetic block 6, the arc extinguishing performance of the arc extinguishing system 2 is also improved.

[0055] All the devices (components whose specific structures are not described) selected in this application are common standard parts or parts known to those skilled in the art, and their structures and principles can be known by those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0056] In the description of the embodiments of the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model may be understood according to specific circumstances.

[0057] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0058] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some communication interfaces. The indirect coupling or communication connection between devices or units may be in electrical, mechanical, or other forms.

[0059] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0060] In addition, in each embodiment of the present utility model, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0061] Inspired by the above-described ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present utility model. The technical scope of the present utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An arc extinguishing system for a rotary disconnector, characterized in that, including a top plate (21), a bottom plate, and an arc extinguishing grid plate group (3), wherein the arc extinguishing grid plate group (3) is arranged between the top plate (21) and the bottom plate (22); an arc extinguishing channel (31) for a moving contact to pass through is formed on the front side of the arc extinguishing grid plate group (3), a magnetic blowing chamber (32) is formed on the rear side of the arc extinguishing grid plate group (3), the magnetic blowing chamber (32) is back to back with the arc extinguishing channel (31), at least one magnetic block (6) is arranged in the magnetic blowing chamber (32), and an insulating member (5) is arranged between the magnetic block (6) and the arc extinguishing grid plate.

2. The arc extinguishing system for a rotary disconnector according to claim 1, characterized in that a pair of arc guiding plates (4) are further arranged between the top plate (21) and the bottom plate (22), and the two arc guiding plates (4) are respectively located on both sides of the arc extinguishing grid plate group (3).

3. The arc extinguishing system for a rotary disconnector according to claim 2, characterized in that the arc guiding plate (4) includes a plate body and an arc guiding folding edge (41), the arc guiding folding edge (41) is located on one side of the arc extinguishing channel (31), and the arc guiding folding edge (41) is bent outwards.

4. The arc extinguishing system for a rotary disconnector according to claim 1, characterized in that the insulating member (5) includes an upper insulating cover (51) and a lower insulating cover (52), at least one accommodating groove is formed in both the upper insulating cover (51) and the lower insulating cover (52), when the upper insulating cover (51) and the lower insulating cover (52) are combined together, the upper and lower accommodating grooves form an accommodating cavity, and the magnetic block (6) is placed in the accommodating cavity.

5. The arc extinguishing system for a rotary disconnector according to claim 1, characterized in that the magnetic blowing chamber (32) transversely penetrates through the whole arc extinguishing grid plate group (3).

6. The arc extinguishing system for a rotary disconnector according to claim 1, characterized in that the arc extinguishing system (2) is arranged in a housing (1) of a conductive device, and the housing (1) includes an upper housing and a lower housing (14), an upper positioning groove is formed on the inner wall of the upper housing, a lower positioning groove (71) is formed on the inner wall of the lower housing (14), the upper positioning groove is adapted to cooperate with the top plate (21), and the lower positioning groove (71) is adapted to cooperate with the bottom plate (22).

7. The arc extinguishing system for a rotary disconnector according to claim 6, characterized in that limit blocks (72) are arranged on the inner walls of the upper housing and the lower housing (14), and the limit blocks (72) are adapted to abut against the insulating member (5) so as to limit the magnetic block (6) in the magnetic blowing chamber (32).

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