Arc extinguishing system for rotary disconnecting switch

Abstract

The invention 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, and is characterized in that the arc extinguishing grid group is 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 invention relates to the field of low-voltage equipment, and in particular to an arc extinguishing system for a rotary isolating switch. Background Art

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

[0003] The principle of the arc extinguishing system currently on the market is to cut the arc through the arc extinguishing grids that are distributed at intervals. In order to increase the arc extinguishing effect, magnetic blocks are added to the arc extinguishing system, and the arc is blown into the arc extinguishing grids by the magnetic blowing force generated by the magnetic blocks. However, the magnetic blocks in the current arc extinguishing system are all arranged on the periphery of the arc extinguishing grid group, such as the arc extinguishing chamber and circuit breaker of the prior patent CN218482184U, in which the magnetic blocks are arranged on the side of the arc extinguishing grid group, and another example is the arc extinguishing chamber and circuit breaker of CN218160253U, in which the magnetic blocks are arranged at the static contact. In the past, the arrangement of magnetic blocks in the arc extinguishing system was relatively unreasonable. Although it can achieve a certain magnetic blowing effect, the effect is not ideal. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an arc extinguishing system for a rotary disconnector to solve the problem that the previous arc extinguishing system used unreasonable arrangement of magnetic blocks, resulting in unsatisfactory magnetic blowing effect.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] An arc extinguishing system for a rotary disconnector is provided, comprising:

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

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

[0009] Furthermore, a pair of arc-striking plates are arranged between the top plate and the bottom plate, and the two arc-striking plates are respectively located on both sides of the arc-extinguishing grid plate group.

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

[0011] Furthermore, the insulating member includes an upper insulating cover and a lower insulating cover, each of which has at least one receiving groove. When the upper insulating cover and the lower insulating cover are combined together, the upper and lower receiving grooves form a receiving cavity, and the magnetic block is placed in the receiving cavity.

[0012] Furthermore, the magnetic blowing chamber transversely penetrates the entire arc extinguishing grid group.

[0013] Furthermore, the arc extinguishing system is arranged in a casing of the conductive device, and the casing comprises

[0014] An upper shell and a lower shell, wherein an upper positioning groove is provided on the inner wall of the upper shell, and a lower positioning groove is provided on the inner wall of the lower shell, wherein the upper positioning groove is suitable for cooperating with the top plate, and the lower positioning groove is suitable for cooperating with the bottom plate.

[0015] Furthermore, limit blocks are provided on the inner walls of the upper shell and the lower shell, and the limit blocks are suitable for abutting against the insulating member, so as to limit the magnetic block in the magnetic blowing chamber.

[0016] The beneficial effects of the present invention are:

[0017] By opening a magnetic blowing chamber in the arc extinguishing grid group, the magnetic blowing chamber is directly backed by 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, the magnetic block is backed by the arc extinguishing channel, the magnetic blowing 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 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. The magnetic block is restricted by the limit block, and the installation structure is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings.

[0020] Figure 1 and Figure 2 It is a schematic diagram of an arc extinguishing system for a rotary disconnector of the present invention;

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

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

[0023] Figure 5 It is a half-section view of the insulating part;

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

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

[0026] in,

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

[0028] 2. Arc extinguishing system, 21. Top plate, 22. Bottom plate;

[0029] 3. Arc extinguishing grid group, 31. Arc extinguishing channel, 32. Magnetic blowing chamber; 3A. Arc extinguishing grid;

[0030] 4. Arc-starting sheet, 41. Arc-starting folding edge;

[0031] 5. Insulating member, 51. Upper insulating cover, 52. Lower insulating cover;

[0032] 6. Magnetic blocks;

[0033] 71. Lower positioning groove, 72. Limit block. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The present application provides an arc extinguishing system for a rotary disconnector, which is 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. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0036] In order to solve the technical problem that the arc extinguishing system 2 in the prior art uses an unreasonable arrangement of the magnetic block 6, resulting in an unsatisfactory magnetic blowing effect, an embodiment of the present application provides an arc extinguishing system for a rotary disconnector, which is described in detail below.

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

[0038] A top plate 21, a bottom plate 22 and an arc-extinguishing grid set 3, wherein the arc-extinguishing grid set 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 provided on the front side of the arc extinguishing grid group 3, and a magnetic blowing chamber 32 is provided on the rear side of the arc extinguishing grid group 3. The magnetic blowing chamber 32 is backed by 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 3A.

[0040] The arc extinguishing grid group 3 is composed of multiple arc extinguishing grid groups 3, such as Figure 3 As shown, the arc extinguishing grid 3A is provided with openings at both the front and rear ends, the front opening corresponds to the arc extinguishing channel 31, and the rear opening corresponds to the magnetic blowing chamber 32. The arc extinguishing grid 3A is a metal part formed by stamping. Blocks are provided at the upper and lower ends of the arc extinguishing grid 3A, and the arc extinguishing grid 3A is respectively connected to the top plate 21 and the bottom plate 22 through the blocks.

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

[0042] The arc-starting piece 4 is mounted on the top plate 21 and the bottom plate 22 by means of a clamping block.

[0043] like Figure 2 As shown, the arc-striking sheet 4 includes a sheet body and an arc-striking folded edge 41 . The arc-striking folded edge 41 is located at one side of the arc extinguishing channel 31 , and the arc-striking folded edge 41 is bent outwards.

[0044] The arc-starting folded edge 41 facilitates guiding the arc on the moving contact rod to the arc-extinguishing grid group 3 .

[0045] In this embodiment, the magnetic blowing chamber 32 transversely penetrates the entire arc extinguishing grid set 3. This structure expands the magnetic blowing range of the magnetic block 6 in the arc extinguishing grid set 3, thereby improving the arc extinguishing performance of the entire arc extinguishing system 2.

[0046] Specifically, as an optional implementation in this embodiment, Figure 4 Figure 5 As shown, the insulating member 5 includes an upper insulating cover 51 and a lower insulating cover 52. The upper insulating cover 51 and the lower insulating cover 52 each have two receiving grooves. When the upper insulating cover 51 and the lower insulating cover 52 are combined together, 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 of 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, the structure of the insulating member 5 also facilitates the installation of the magnetic block 6 into the arc-extinguishing grid group 3.

[0048] like 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 system 2 is installed on both sides of the housing 1, and the two static contacts 12 are respectively on both sides of the housing 1. The two sides of the arc extinguishing system 2 are 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 shell, and a lower positioning groove 71 is formed on the inner wall of the lower shell 14 . The upper positioning groove is suitable for cooperating with the top plate 21 , and the lower positioning groove 71 is suitable for cooperating with the bottom plate 22 .

[0051] When the arc extinguishing system 2 is installed in the casing 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 casing 1 .

[0052] Specifically, as an optional implementation in this embodiment, limit blocks 72 are provided on the inner walls of the upper shell and the lower shell 14 , and the limit blocks 72 are suitable for abutting against the insulating member 5 , thereby limiting the magnetic block 6 in the magnetic blowing chamber 32 .

[0053] like Figure 6 As described above, the limit block 72 arranged on the inner wall of the lower shell 14 abuts against the rear side of the insulating part 5 after the casing 1 is assembled, restricting the insulating part 5 from moving backward, and the left and right positions of the insulating part 5 are limited by the arc-starting piece 4.

[0054] The arc extinguishing system for the rotary disconnector of the present invention installs the magnetic block 6 in the magnetic blowing chamber 32 on the rear side of the arc extinguishing grid group 3, so that the installation of the magnetic block 6 in the arc extinguishing system 2 will not occupy the position of the arc extinguishing system additionally, and because the magnetic block 6 is inside the arc extinguishing grid group 3, the magnetic blowing effect is better, and the magnetic blowing force can blow the arc away in the arc extinguishing grid group 3, so that the arc can quickly and comprehensively enter the arc extinguishing grid group 3, improve the arc striking ability, and facilitate arc extinguishing. While optimizing the installation structure of the magnetic block 6, the arc extinguishing performance of the arc extinguishing system 2 is also improved.

[0055] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0056] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 an indirect connection 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.

[0057] 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.

[0058] In the several embodiments provided in 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 merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For 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 mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

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

[0060] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0061] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of 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: include 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 provided on the front side of the arc extinguishing grid group (3), a magnetic blowing chamber (32) is provided on the rear side of the arc extinguishing grid group (3), the magnetic blowing chamber (32) is backed by 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.

2. The arc extinguishing system for a rotary disconnector according to claim 1, characterized in that: A pair of arc-striking plates (4) are also arranged between the top plate (21) and the bottom plate (22), and the two arc-striking 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-striking sheet (4) comprises a sheet body and an arc-striking folded edge (41), wherein the arc-striking folded edge (41) is located on one side of the arc-extinguishing channel (31), and the arc-striking folded 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) comprises an upper insulating cover (51) and a lower insulating cover (52), each of the upper insulating cover (51) and the lower insulating cover (52) being provided with at least one receiving groove, and when the upper insulating cover (51) and the lower insulating cover (52) are combined together, the upper and lower receiving grooves form a receiving cavity, and the magnetic block (6) is placed in the receiving cavity.

5. The arc extinguishing system for a rotary disconnector according to claim 1, characterized in that: The magnetic blowing chamber (32) transversely penetrates the entire 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 casing (1) of a conductive device, and the casing (1) comprises An upper shell and a lower shell (14), wherein an upper positioning groove is provided on the inner wall of the upper shell, and a lower positioning groove (71) is provided on the inner wall of the lower shell (14), wherein the upper positioning groove is suitable for cooperating with the top plate (21), and the lower positioning groove (71) is suitable for cooperating 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 provided on the inner walls of the upper shell and the lower shell (14), and the limit blocks (72) are suitable for abutting against the insulating member (5), thereby limiting the magnetic block (6) in the magnetic blowing chamber (32).

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