Arc extinguish chamber with flashover elimination assembly

Abstract

The utility model relates to the technical field of arc extinguish chambers, in particular to an arc extinguish chamber with a flashover elimination assembly, which comprises a fixed plate, an arc extinguish grid plate assembly and the flashover elimination assembly. The number of the fixing plates is two, the two fixing plates are arranged at a certain interval, and the arc extinguishing grid plate assembly is fixed between the two fixing plates. The flashover eliminating assembly is arranged on one side of the arc outlet end of the arc extinguishing grid plate assembly and comprises an arc inlet plate and an insulating back plate, an arc inlet hole is formed in the arc inlet plate, an arc extinguishing channel is formed between the arc inlet plate and the insulating back plate, one end of the arc extinguishing channel is a closed end, and the other end of the arc extinguishing channel is an arc outlet; and a plurality of arc extinguishing plates are fixed in the arc extinguishing channel. According to the utility model, the flashover elimination assembly is arranged in the arc extinguish chamber, so that flashover can be effectively captured and eliminated, and the arc extinguish effect and safety of the arc extinguish chamber are improved.

Description

Technical Field

[0001] This utility model relates to the field of arc-extinguishing chamber technology, and specifically to an arc-extinguishing chamber with an arc-eliminating component. Background Technology

[0002] In power systems, arc-extinguishing chambers play a crucial role in ensuring the safe interruption of circuits. However, existing arc-extinguishing chambers have shortcomings in handling arc flashover, potentially leading to problems such as residual arc and unsatisfactory arc extinguishing effects. Current solutions involve adding an arc flashover elimination device to the outside of the circuit breaker, which is quite bulky. Utility Model Content

[0003] The purpose of this invention is to provide an arc-extinguishing chamber with an arc-extinguishing component to address the shortcomings of existing arc-extinguishing chambers in handling arc flashes and improve arc-extinguishing effect and safety.

[0004] The technical solution adopted by this utility model is as follows: An arc-extinguishing chamber with an arc-extinguishing component includes a fixing plate, an arc-extinguishing grid assembly, and an arc-extinguishing component. Two fixing plates are provided, spaced a certain distance apart, and the arc-extinguishing grid assembly is fixed between the two fixing plates. The arc-extinguishing component is located on the arc-out end side of the arc-extinguishing grid assembly, and includes an arc-inlet plate and an insulating back plate. The arc-inlet plate has an arc-inlet hole, and an arc-extinguishing channel is formed between the arc-inlet plate and the insulating back plate. One end of the arc-extinguishing channel is a closed end, and the other end is an arc-outlet. Several arc-extinguishing plates are fixed within the arc-extinguishing channel.

[0005] The arc inlet hole is a strip-shaped hole extending in the longitudinal direction. There are several arc inlet holes, which are distributed sequentially at intervals from the closed end to the arc outlet end.

[0006] Several arc-extinguishing plates are distributed sequentially at intervals from the closed end to the arc-exit end, with the arc-entry holes alternately staggered.

[0007] The insulating back plate is provided with a slot, one side of the arc extinguishing plate is inserted and fixed to the insulating back plate and the other side abuts against the surface of the arc inlet plate; the upper and lower sides of the arc inlet plate and the insulating back plate are respectively fixedly connected to two fixing plates.

[0008] The upper and lower sides of the insulating backplate have protrusions that form several mating blocks, and slots are formed between adjacent mating blocks.

[0009] One end of the insulating back plate is bent to form a folded plate, and the folded plate is attached to the surface of the arc-inducing plate to form the closed end of the arc-extinguishing channel.

[0010] The arc-extinguishing grid assembly consists of a first arc-extinguishing grid group, a second arc-extinguishing grid group, and a third arc-extinguishing grid group arranged in an "L" shape and connected in sequence. The first arc-extinguishing grid group consists of at least two parallel arc-extinguishing grids, and the third arc-extinguishing grid group consists of at least two parallel arc-extinguishing grids that are perpendicular to the first arc-extinguishing grid group. The second arc-extinguishing grid group is located at a corner, and the arc-extinguishing grids therein are arranged radially with the adjacent arc-extinguishing grids.

[0011] The arc extinguishing assembly is provided in two sets, and the two sets of arc extinguishing assemblies are respectively distributed on the arc-out end side of the first arc-extinguishing grid plate group and the arc-out end side of the third arc-extinguishing grid plate group. Both sets of arc extinguishing assemblies extend to the arc-out end side of the second arc-extinguishing grid plate group, and the arc-out port of both sets of arc extinguishing assemblies is located on the arc-out end side of the second arc-extinguishing grid plate group. The arc-inlet plates of the two sets of arc extinguishing assemblies are connected, and the insulating back plates are spaced a certain distance apart to form an air outlet.

[0012] The outer side of the first arc-extinguishing grid plate group is provided with a first arc-inducing plate, which is used to connect with the stationary contact;

[0013] The outer side of the third arc-extinguishing grid plate group is provided with a second arc-inducing plate, and the second arc-inducing plate is provided with a bent arc-inducing part for cooperating with the opening position of the moving contact;

[0014] The first arc-inducing plate and the second arc-inducing plate extend into the arc-entry holes near the closed ends of the two sets of arc-eliminating components, respectively.

[0015] The beneficial effects of this utility model are as follows: By setting an arc-extinguishing component in the arc-extinguishing chamber, this utility model can effectively capture and eliminate arcs, thereby improving the arc-extinguishing effect and safety of the arc-extinguishing chamber. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0017] Figure 1 This is a cross-sectional view of one embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure of an arc-eliminating component according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of an arc-extinguishing plate according to an embodiment of the present invention;

[0020] In the figure, the components are: fixed plate-100, first arc-extinguishing grid plate group-210, second arc-extinguishing grid plate group-220, third arc-extinguishing grid plate group-230, arc-entry plate-310, arc-entry hole-311, insulating back plate-320, mating block-321, folding plate-322, arc-extinguishing plate-330, first arc-initiating plate-410, second arc-initiating plate-420, and arc-initiating part-421. Detailed Implementation

[0021] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0022] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0023] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0024] An arc-extinguishing chamber with an arc-extinguishing component, such as Figure 1 As shown, it includes a fixing plate 100, an arc-extinguishing grid assembly, and an arc-eliminating assembly.

[0025] Two fixing plates 100 are provided. During actual assembly, the two fixing plates are set in parallel at a specific interval, providing a stable mounting base for the arc extinguishing grid assembly and the arc elimination assembly.

[0026] The arc-extinguishing grid assembly consists of a first arc-extinguishing grid group 210, a second arc-extinguishing grid group 220, and a third arc-extinguishing grid group 230 arranged in an "L" shape and connected sequentially. The first arc-extinguishing grid group 210 consists of at least two parallel arc-extinguishing grids, and the third arc-extinguishing grid group 230 consists of at least two parallel arc-extinguishing grids perpendicular to the first arc-extinguishing grid group 210. The second arc-extinguishing grid group 220 is located at a corner, and its arc-extinguishing grids are arranged radially with adjacent arc-extinguishing grids. The "L"-shaped arrangement of the arc-extinguishing grids in the arc-extinguishing grid assembly plays an important role in the generation of an electric arc during circuit breaking, and can further effectively promote the elongation, breaking, and extinguishing of the electric arc generated during disconnection, thereby improving the breaking capacity of the circuit breaker.

[0027] The arc-extinguishing component is located on the arc-ejection end side of the arc-extinguishing grid assembly. After the arc is divided and cooled by the arc-extinguishing grid, the discharged gas will contain a certain amount of arc flash. After entering the arc-extinguishing component, it can be further eliminated. Specifically, as shown... Figure 1 , Figure 2 As shown, the arc extinguishing assembly includes an arc inlet plate 310 and an insulating back plate 320. The arc inlet plate 310 has an arc inlet hole 311, and an arc extinguishing channel is formed between the arc inlet plate 310 and the insulating back plate 320. One end of the arc extinguishing channel is a closed end, and the other end is an arc outlet. Several arc extinguishing plates 330 are fixed inside the arc extinguishing channel. When the arc escapes from the arc extinguishing grid assembly, it enters the arc extinguishing channel through the arc inlet hole on the arc inlet plate, passes through the several arc extinguishing plates 330 in the arc extinguishing channel, and is discharged through the arc outlet, effectively dissipating the energy of the arc and promoting its extinguishing. The structure of the arc extinguishing plate 330 is as follows: Figure 3 As shown, several through holes are provided, increasing the contact area and time between the electric arc and the arc-extinguishing plate, thereby more effectively dissipating the energy of the electric arc. Furthermore, the insulating back plate 320 can effectively block other areas within the circuit breaker switch from escaping arcing, preventing excessive temperature rise.

[0028] The arc inlet hole 311 is a strip-shaped hole extending in the longitudinal direction. Several arc inlet holes 311 are provided and are distributed at intervals from the closed end to the arc outlet end. This facilitates the rapid entry of the electric arc escaping from the arc extinguishing grid assembly into the arc extinguishing channel.

[0029] Several extinguishing plates fixed within the arc-extinguishing channel are distributed at intervals from the closed end to the arc exit, and are alternately staggered from the arc inlet hole. Several extinguishing plates 330 are also distributed at intervals from the closed end to the arc exit end, with the arc inlet hole 311 alternately staggered from them. This arrangement ensures that the arc is evenly distributed within the arc-extinguishing channel and that the arc contacts the extinguishing plates 330 are staggered, preventing arc accumulation.

[0030] like Figure 2 As shown, the insulating back plate 320 is provided with slots. One side of the arc-extinguishing plate 330 is inserted and fixed to the insulating back plate 320, and the other side abuts against the surface of the arc-inducing plate 310. The upper and lower sides of the arc-inducing plate 310 and the insulating back plate 320 are respectively fixedly connected to two fixing plates 100. The slot design on the insulating back plate facilitates the insertion and fixing of the arc-extinguishing plate, while ensuring the stability of the arc-extinguishing plate's position. The fixed connection of the upper and lower sides of the arc-inducing plate and the insulating back plate to the fixing plates ensures the structural stability of the entire arc-extinguishing assembly. Specifically, the upper and lower sides of the insulating back plate 320 protrude to form several mating blocks 321, and slots are formed between adjacent mating blocks 321. The setting of the mating blocks 321 can ensure the width space of the arc-extinguishing channel while increasing the depth of the slots, which is beneficial to the stable fixing of the arc-extinguishing plate 330.

[0031] One end of the insulating back plate 320 is bent to form a folded plate 322, which fits against the surface of the arc-inducing plate 310 to form the closed end of the arc-extinguishing channel. This reduces the number of parts and facilitates assembly.

[0032] In this embodiment, two sets of arc-extinguishing components are provided for the arc-emitting ends of the first and third arc-extinguishing grid groups, respectively. Both sets extend to one side of the arc-emitting end of the second arc-extinguishing grid group 220, and the arc-emitting ports of both sets are located on one side of the arc-emitting end of the second arc-extinguishing grid group 220. The arc-inlet plates 310 of the two sets of arc-extinguishing components are connected, and the insulating back plates 320 are spaced apart to form air outlets. This structural arrangement can comprehensively cover areas where arcing may occur.

[0033] Furthermore, such as Figure 1 As shown, the first arc-extinguishing grid plate group 210 has a first arc-inducing plate 410 on its outer side, which is used to connect with the stationary contact; the third arc-extinguishing grid plate group 230 has a second arc-inducing plate 420 on its outer side, which has a bent arc-inducing part 421 for cooperating with the opening position of the moving contact; the arrangement of the first arc-inducing plate 410 and the second arc-inducing plate 420 facilitates the extraction of the arc from the opening stationary contact and the moving contact. Furthermore, the first arc-inducing plate 410 and the second arc-inducing plate 420 extend into the arc inlet holes 311 near the closed end of the two sets of arc-extinguishing components, which helps to guide the arc to quickly enter the arc-extinguishing components.

[0034] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An arc extinguishing chamber with arc flight elimination assembly, comprising a fixed plate (100) and an arc extinguishing grid assembly, the fixed plate (100) is provided with two and two is set apart a certain interval, the arc extinguishing grid assembly is fixed between two fixed plates (100), characterized in that: It also includes an arc extinguishing component, which is disposed on the arc-out end side of the arc-extinguishing grid assembly. The component includes an arc-inlet plate (310) and an insulating back plate (320). The arc-inlet plate (310) is provided with an arc-inlet hole (311). An arc-extinguishing channel is formed between the arc-inlet plate (310) and the insulating back plate (320). One end of the arc-extinguishing channel is a closed end and the other end is an arc-outlet. Several arc-extinguishing plates (330) are fixed inside the arc-extinguishing channel.

2. The arc blast chamber having arc flight elimination assembly as claimed in claim 1 wherein: The arc inlet hole (311) is a strip-shaped hole extending in the longitudinal direction. There are several arc inlet holes (311), which are distributed sequentially at intervals from the closed end to the arc outlet end.

3. The arc blast chamber having arc flight elimination assembly as claimed in claim 2 wherein: Several arc-extinguishing plates (330) are distributed sequentially at intervals from the closed end to the arc-exit end, and the arc-entry holes (311) are alternately staggered.

4. The arc blast chamber having arc flight elimination assembly as claimed in claim 3 wherein: The insulating back plate (320) is provided with a slot, and the arc extinguishing plate (330) is inserted and fixed on one side of the insulating back plate (320) and abuts against the surface of the arc inlet plate (310) on the other side; the arc inlet plate (310) and the insulating back plate (320) are fixedly connected to two fixing plates (100) on the upper and lower sides respectively.

5. The arc blast chamber having arc flight elimination assembly as claimed in claim 4 wherein: The upper and lower sides of the insulating back plate (320) protrude to form several mating blocks (321), and slots are formed between adjacent mating blocks (321).

6. The arc blast elimination assembly having an arc chute according to claim 1, wherein: One end of the insulating back plate (320) is bent to form a folded plate (322), and the folded plate (322) is attached to the surface of the arc-inducing plate (310) to form the closed end of the arc-extinguishing channel.

7. An arc blast chamber having an arc blast elimination assembly as claimed in any one of claims 1 to 6, wherein: The arc-extinguishing grid assembly consists of a first arc-extinguishing grid group (210), a second arc-extinguishing grid group (220), and a third arc-extinguishing grid group (230) arranged in an "L" shape and connected in sequence. The first arc-extinguishing grid group (210) consists of at least two parallel arc-extinguishing grids. The third arc-extinguishing grid group (230) consists of at least two parallel arc-extinguishing grids that are perpendicular to the first arc-extinguishing grid group (210). The second arc-extinguishing grid group (220) is located at a corner and its arc-extinguishing grids are arranged radially with the adjacent arc-extinguishing grids. The arc extinguishing assembly is provided in two sets, and the two sets of arc extinguishing assemblies are respectively distributed on the arc-out end side of the first arc-extinguishing grid plate group (210) and the arc-out end side of the third arc-extinguishing grid plate group (230). Both sets of arc extinguishing assemblies extend to the arc-out end side of the second arc-extinguishing grid plate group (220), and the arc-out port of both sets of arc extinguishing assemblies is located on the arc-out end side of the second arc-extinguishing grid plate group (220). The arc-inlet plates (310) of the two sets of arc extinguishing assemblies are connected, and the insulating back plates (320) are separated by a certain distance to form an air outlet.

8. The arc blast chamber having arc flight elimination assembly as claimed in claim 7 wherein: The outer side of the first arc-extinguishing grid plate group (210) is provided with a first arc-inducing plate (410), which is used to connect with the stationary contact; The third arc-extinguishing grid plate group (230) is provided with a second arc-inducing plate (420) on its outer side. The second arc-inducing plate (420) is provided with a bent arc-inducing part (421) for cooperating with the opening position of the moving contact. The first arc-inducing plate (410) and the second arc-inducing plate (420) extend into the arc-inlet holes (311) near the closed ends of the two sets of arc-eliminating components, respectively.

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