Arc extinguishing assembly and contact system
By designing permanent magnets in electrical equipment to guide the electric arc into a closed arc-extinguishing channel and accelerate cooling, the problems of complex and space-consuming arc-extinguishing chambers in existing electrical equipment are solved, achieving efficient arc extinguishing and extending equipment life.
Patent Information
- Application Number
- CN202520303357.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-02-24
AI Technical Summary
In existing electrical equipment, the arc-extinguishing chamber is complex and requires a large layout space, resulting in poor arc-extinguishing effect, which leads to melting and evaporation of the contact surface and affects the life of the equipment.
Design an arc extinguishing component, including a permanent magnet and a mounting housing. The housing has a second mounting chamber at both the upper and lower ends. The permanent magnet generates a magnetic field to guide the electric arc into the arc extinguishing channel, and the arc is cooled and extinguished by the closed arc extinguishing channel and the partition rib structure.
It effectively improves arc extinguishing effect, shortens arc duration, enhances cooling speed, extends the service life of contact system, and has a simple structure and small footprint.
Smart Images
Figure CN223941698U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrical equipment technology, and more specifically, to an arc extinguishing component and a contact system. Background Technology
[0002] In the field of electrical equipment, electric arcs are generated during the closing and opening of the moving and stationary contacts of a switch. These arcs can cause the contact surface to melt and evaporate, which can seriously affect the contact performance of the contacts in the long run, thus shortening the life of the equipment.
[0003] However, existing electrical equipment has complex arc-extinguishing chambers that usually require a large layout space and have poor arc-extinguishing effect. Utility Model Content
[0004] The purpose of this invention is to provide an arc-extinguishing component and a contact system that can effectively extinguish arcs and extend the service life of the contact system.
[0005] The embodiments of this utility model are implemented as follows:
[0006] In a first aspect, this utility model provides an arc-extinguishing component, comprising:
[0007] permanent magnet;
[0008] The mounting housing has a first mounting chamber and two second mounting chambers. The permanent magnet is disposed in the first mounting chamber, and the two second mounting chambers are disposed on the top and bottom sides of the mounting housing. Each second mounting chamber includes an inlet, an arc-extinguishing channel, and an outlet connected in sequence. The two inlets at the top and bottom ends are arranged opposite each other. The arc-extinguishing channel extends along the end of the mounting housing, and the two outlets are respectively disposed at the top and bottom of the mounting housing.
[0009] In an optional embodiment, the side of the permanent magnet facing the mounting housing with the second mounting chamber is an N pole or an S pole, and magnetic shielding plates are provided at the upper and lower ends of the permanent magnet.
[0010] In an optional embodiment, there are multiple permanent magnets, and the magnetic poles of the multiple permanent magnets are arranged in the same direction.
[0011] In an optional implementation, two adjacent permanent magnets are arranged at an angle.
[0012] In an optional embodiment, a plurality of spaced first dividing ribs are provided at one end of the arc extinguishing channel near the outlet. The first dividing ribs divide the arc extinguishing channel into a plurality of secondary channels. There are a plurality of outlets, and the plurality of outlets are connected to the plurality of secondary channels one by one.
[0013] In an optional embodiment, the top and bottom of the mounting housing are provided with a plurality of second partition ribs, the plurality of second partition ribs are spaced apart and form a plurality of first channels, the first channels are connected to the outlet, and the first channels extend in a direction away from the outlet.
[0014] In an optional embodiment, the arc extinguishing assembly further includes two separate grid plate groups, which are respectively disposed at the top and bottom of the mounting housing;
[0015] The grid assembly includes multiple grids, which are spaced apart to form a second channel, and the multiple second channels are configured to correspond one-to-one with the multiple outlets.
[0016] In an optional embodiment, the grid includes a first segment and a second segment connected together, one end of the first segment extending into the outlet and the other end extending in a direction away from the outlet, and the second segment extending along the side wall of the mounting housing.
[0017] In an optional embodiment, the two ends of the arc extinguishing channel are the inlet and the outlet, respectively, and the sides are a closed structure.
[0018] Secondly, this utility model provides a contact system, including a housing, a moving contact, a stationary contact, and an arc-extinguishing assembly as described in any of the foregoing embodiments. The moving contact is rotatably or slidably disposed in the housing, and the stationary contact and the arc-extinguishing assembly are both disposed in the housing. The cross-section of the moving contact and the stationary contact is located between the openings of the two second mounting chambers.
[0019] The beneficial effects of the arc-extinguishing assembly and contact system provided in this embodiment of the invention include: by providing second mounting chambers at both the upper and lower ends of the mounting housing, with the openings of the two second mounting chambers facing each other and positioned on the upper and lower sides of the dividing surface between the moving and stationary contacts, when an arc is generated, the arc can enter the arc-extinguishing channel through the two openings and flow out from the outlet through the arc-extinguishing channel. Due to the closed nature of the arc-extinguishing channel, the arc is effectively prevented from scattering and overflowing during the transfer process, thus effectively improving the arc-extinguishing effect. Furthermore, by providing a permanent magnet in the first mounting chamber, the magnetic field generated by the permanent magnet can effectively guide the arc to the entrance of the second mounting chamber, which helps to extinguish the arc more quickly, shorten the arc duration, and increase the cooling effect of the arc, thereby accelerating the cooling rate of the arc and further accelerating the arc extinguishing process. Therefore, the arc-extinguishing assembly provided in this embodiment of the invention has a simple structure, occupies little space, and has a good arc-extinguishing effect. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is one of the schematic diagrams of the contact system structure provided in the embodiment of this utility model;
[0022] Figure 2 This is a first-view structural schematic diagram of the arc-extinguishing component provided in the first embodiment of the present utility model.
[0023] Figure 3 Exploded view of the first embodiment of the arc extinguishing component provided in this utility model;
[0024] Figure 4 This is a schematic diagram of the arc-extinguishing component of the first embodiment provided by this utility model from a second perspective.
[0025] Figure 5 This is a schematic diagram of the permanent magnet structure provided in an embodiment of the present utility model;
[0026] Figure 6 A schematic diagram of the second embodiment of the arc extinguishing component provided in this utility model;
[0027] Figure 7 The second schematic diagram of the contact system structure provided for an embodiment of this utility model.
[0028] Icons: 10-Contact system; 100-Arc extinguishing assembly; 110-Permanent magnet; 111-Magnetic shielding plate; 120-Mounting housing; 121-First mounting chamber; 122-Second mounting chamber; 1221-Inlet; 1222-Arc extinguishing channel; 1223-Outlet; 130-First separating rib; 140-Secondary channel; 150-Second separating rib; 160-First channel; 170-Grid plate; 171-First section; 172-Second section; 180-Second channel; 200-Moving contact; 300-Stationary contact. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0033] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.
[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0035] In the field of electrical equipment, electric arcs are generated during the closing and opening of the moving and stationary contacts of a switch. These arcs can cause the contact surface to melt and evaporate, which can seriously affect the contact performance of the contacts in the long run, thus shortening the life of the equipment.
[0036] However, existing electrical equipment has complex arc-extinguishing chambers that usually require a large layout space and have poor arc-extinguishing effect.
[0037] Based on the problems existing in the current technology, please refer to Figures 1 to 5 This utility model provides a contact system 10, which is applied in the field of low-voltage electrical equipment technology. The contact system 10 includes a housing, an operating mechanism, and a moving contact 200, a stationary contact 300, and an arc-extinguishing assembly 100 disposed within the housing. The moving contact 200 is rotatably or slidably disposed in the housing. The cross-section of the moving contact 200 and the stationary contact 300 is located between the openings of two second mounting chambers 122, which can effectively extinguish arcs and extend the service life of the contact system 10.
[0038] In this embodiment, it should be noted that, as Figure 1 As shown, the moving contact 200 can be a translational structure; moreover, as... Figure 7 As shown, the moving contact 200 can also be a rotary structure, which is not specifically limited here.
[0039] In detail, the arc extinguishing assembly 100 includes a permanent magnet 110 and a mounting housing 120.
[0040] The mounting housing 120 is provided with a first mounting chamber 121 and two second mounting chambers 122. The permanent magnet 110 is disposed in the first mounting chamber 121. The two second mounting chambers 122 are disposed on the top and bottom sides of the mounting housing 120. The second mounting chamber 122 includes an inlet 1221, an arc extinguishing channel 1222 and an outlet 1223 connected in sequence. The two inlets 1221 at the upper and lower ends are disposed opposite to each other. The arc extinguishing channel 1222 extends along the end of the mounting housing 120. The two outlets 1223 are respectively disposed at the top and bottom of the mounting housing 120.
[0041] In this embodiment, by providing second mounting chambers 122 at both the upper and lower ends of the mounting housing 120, and by setting the openings of the two second mounting chambers 122 opposite to each other, and by setting the two openings on the upper and lower sides of the dividing surface between the moving contact 200 and the stationary contact 300, when an electric arc is generated, the electric arc can enter the arc extinguishing channel 1222 along the upper and lower openings, and flow out from the outlet 1223 through the arc extinguishing channel 1222. Due to the closed nature of the arc extinguishing channel 1222, the electric arc is effectively prevented from scattering and overflowing during the transfer process, thus effectively improving the arc extinguishing effect.
[0042] Furthermore, by setting a permanent magnet 110 in the first mounting chamber 121, the magnetic field generated by the permanent magnet 110 can effectively guide the arc to move to the entrance 1221 of the second mounting chamber 122, which helps to extinguish the arc more quickly, shorten the arc duration, and also increases the arc cooling effect, thereby accelerating the arc cooling speed and further accelerating the arc extinguishing process.
[0043] Therefore, it can be seen that the arc extinguishing component 100 provided in this embodiment of the present invention has a simple structure, occupies little space, and has a good arc extinguishing effect.
[0044] It should also be noted that the arc extinguishing channel 1222 has open structures at both ends, namely the inlet 1221 and the outlet 1223, while the side of the arc extinguishing channel 1222 is a completely closed structure.
[0045] Furthermore, the side of the permanent magnet 110 facing the mounting housing 120 where the second mounting chamber 122 is located is the N pole or the S pole, and magnetic shielding plates 111 are provided at the upper and lower ends of the permanent magnet 110.
[0046] In this embodiment, the side of the permanent magnet 110 facing the mounting housing 120 where the second mounting chamber 122 is located is the S pole, and the other side is the N pole. Magnetic shielding plates 111 are provided at the upper and lower ends of the permanent magnet 110 to isolate the reverse magnetic field at both ends of the permanent magnet 110. As a result, the reverse magnetic field in the air is reduced and cannot prevent the electric arc from passing through, thereby ensuring that the electric arc can effectively enter the second mounting chamber 122 and improving the arc extinguishing effect.
[0047] Furthermore, there are multiple permanent magnets 110, and the magnetic poles of the multiple permanent magnets 110 are arranged in the same direction.
[0048] In this embodiment, by setting multiple permanent magnets 110 with the same magnetic pole direction, the magnetic field direction of the permanent magnets 110 has a component parallel to the breaking plane, thereby causing the electric arc to move in a direction perpendicular to the breaking plane, thus lengthening the electric arc.
[0049] Optionally, as shown in the figure, in this embodiment, there are two permanent magnets 110, and the mounting housing 120 is provided with two first mounting chambers 121, in which the two permanent magnets 110 are respectively disposed. Of course, in other embodiments of this utility model, other numbers of permanent magnets 110 may be provided, which are not specifically limited here.
[0050] In detail, two adjacent permanent magnets 110 are set at an angle (as shown in angle A in the figure).
[0051] In this embodiment, multiple permanent magnets 110 are vertically arranged, with one magnetic pole of each permanent magnet 110 facing the side of the mounting housing 120 where the second mounting chamber 122 is located, and the other magnetic pole facing the back side of the mounting housing 120 away from the second mounting chamber 122. Furthermore, the parallel plane of any one permanent magnet 110 parallel to its magnetic pole plane forms an angle with the parallel plane of the magnetic pole plane of an adjacent permanent magnet 110. In other words, the two magnetic pole planes of the same permanent magnet 110 are arranged parallel, and the magnetic pole plane of one permanent magnet 110 forms an angle with the magnetic pole plane of an adjacent permanent magnet 110, with the angle opening direction facing the side of the mounting housing 120 where the second mounting chamber 122 is located.
[0052] Optionally, the included angle between two adjacent permanent magnets 110 can be between 5° and 20°. For example, the included angle between two adjacent permanent magnets 110 can be 5°, 10°, 15° and 20°. Of course, it is not limited to this, and the included angle between two adjacent permanent magnets 110 can also be other values, which are not specifically limited here.
[0053] Furthermore, the arc extinguishing channel 1222 is provided with multiple first dividing ribs 130 at intervals near the outlet 1223. The first dividing ribs 130 divide the arc extinguishing channel 1222 into multiple secondary channels 140. There are multiple outlets 1223, and the multiple outlets 1223 are connected to the multiple secondary channels 140 in a one-to-one correspondence.
[0054] In this embodiment, by setting multiple first separating ribs 130 in the arc extinguishing channel 1222 and dividing the isolation channel into multiple secondary channels 140, not only can the electric arc and high-temperature gas entering the arc extinguishing channel 1222 be separated, but the contact area between the electric arc and high-temperature gas and the arc extinguishing channel 1222 is also increased, that is, the cooling area is increased, thereby improving the arc extinguishing effect.
[0055] It should be noted that the flow area of the arc extinguishing channel 1222 gradually decreases from the middle of the mounting housing 120 in the direction away from the middle, and multiple first partition ribs 130 are arranged at the end with a smaller flow area in the arc extinguishing channel 1222.
[0056] Furthermore, the top and bottom of the mounting housing 120 are provided with a plurality of second partition ribs 150, the plurality of second partition ribs 150 are spaced apart and form a plurality of first channels 160, the first channels 160 are connected to the outlet 1223, and the first channels 160 extend in a direction away from the outlet 1223.
[0057] In this embodiment, by providing a plurality of second partition ribs 150 at the bottom and top of the mounting housing 120, and by providing a plurality of first channels 160 formed by the plurality of second partition ribs 150 corresponding to a plurality of outlets 1223, the electric arc and high-temperature gas discharged from the outlets 1223 are further separated.
[0058] It should be noted that since the permanent magnet 110 is set in the first mounting chamber 121 of the mounting housing 120, and the top and bottom of the mounting housing 120 also form multiple first channels 160, that is, the first channels 160 located at both ends of the mounting housing 120 are also located at the upper and lower ends of the permanent magnet respectively, the electric arc and high temperature gas cannot overflow to the arc extinguishing channel 1222 and the surrounding area outside the first channel 160, but can only overflow to the first channels 160 at both ends under the action of air blowing.
[0059] Furthermore, in other embodiments of this utility model, such as Figure 6 As shown, the arc extinguishing assembly 100 may also include two separate grid groups, which are respectively disposed on the top and bottom of the mounting housing 120.
[0060] The grid assembly includes multiple grids 170. In this embodiment, the top and bottom of the mounting housing 120 are not provided with second partition ribs 150, but multiple grids 170 are provided at the top and bottom of the mounting housing 120. The multiple grids 170 are spaced apart and form second channels 180. The multiple second channels 180 are provided in a one-to-one correspondence with multiple outlets 1223.
[0061] In this embodiment, multiple second channels 180 corresponding to multiple outlets 1223 are formed by multiple grid plates 170, further separating the electric arc and high-temperature gas discharged from the outlets 1223.
[0062] Furthermore, the grid 170 includes a first segment 171 and a second segment 172 connected to each other. One end of the first segment 171 extends into the outlet 1223, and the other end extends in a direction away from the outlet 1223. The second segment 172 extends along the side wall of the mounting housing 120.
[0063] In this embodiment, the first segment 171 and the second segment 172 are vertically connected, and the first segment 171 extends along the bottom or top of the mounting housing 120, while the second segment 172 extends vertically along the side wall of the mounting housing 120 toward the middle of the mounting housing 120, thereby forming an L-shaped second channel 180, so that the electric arc and high-temperature gas are discharged from the outlet 1223 and then discharged along the top and bottom of the mounting housing 120 along the second channel 180 to the back side of the mounting housing 120.
[0064] Furthermore, the mounting housing 120 is made of gas-generating material, which not only protects the permanent magnet 110 from demagnetization, but also cools the electric arc and enhances the air blowing effect.
[0065] In summary, this utility model provides an arc-extinguishing assembly 100 and a contact system 10. By providing second mounting chambers 122 at both the upper and lower ends of the mounting housing 120, and arranging the openings of the two second mounting chambers 122 opposite to each other, with the two openings located on the upper and lower sides of the dividing surface between the moving contact 200 and the stationary contact 300, when an arc is generated, the arc can enter the arc-extinguishing channel 1222 along the two openings and flow out from the outlet 1223 through the arc-extinguishing channel 1222. Due to the closed nature of the arc-extinguishing channel 1222, the arc is effectively prevented from scattering and overflowing during the transfer process, thus effectively improving the arc-extinguishing effect. Furthermore, by providing a permanent magnet 110 in the first mounting chamber 121, the magnetic field generated by the permanent magnet 110 can effectively guide the arc to move to the entrance 1221 of the second mounting chamber 122, which helps to extinguish the arc more quickly, shorten the arc duration, and increase the arc cooling effect, thereby accelerating the arc cooling rate and further accelerating the arc extinguishing process. Therefore, it can be seen that the arc extinguishing component 100 provided in this embodiment of the present invention has a simple structure, occupies little space, and has a good arc extinguishing effect.
[0066] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An arc-extinguishing assembly (100), characterized in that, include: Permanent magnet(110); The mounting housing (120) is provided with a first mounting chamber (121) and two second mounting chambers (122). The permanent magnet (110) is disposed in the first mounting chamber (121). The two second mounting chambers (122) are disposed on the top and bottom sides of the mounting housing (120). The second mounting chamber (122) includes an inlet (1221), an arc extinguishing channel (1222), and an outlet (1223) that are connected in sequence. The two inlets (1221) at the upper and lower ends are disposed opposite to each other. The arc extinguishing channel (1222) extends along the end of the mounting housing (120). The two outlets (1223) are respectively disposed on the top and bottom of the mounting housing (120).
2. The arc-extinguishing assembly (100) according to claim 1, characterized in that, The side of the permanent magnet (110) facing the mounting housing (120) where the second mounting chamber (122) is provided is the N pole or the S pole, and magnetic shielding plates (111) are provided at the upper and lower ends of the permanent magnet (110).
3. The arc-extinguishing assembly (100) according to claim 1, characterized in that, The number of permanent magnets (110) is multiple, and the magnetic poles of the multiple permanent magnets (110) are arranged in the same direction.
4. The arc-extinguishing assembly (100) according to claim 3, characterized in that, The two adjacent permanent magnets (110) are arranged at an angle.
5. The arc-extinguishing assembly (100) according to claim 1, characterized in that, The arc-extinguishing channel (1222) is further provided with a plurality of spaced first dividing ribs (130) at one end near the outlet (1223). The first dividing ribs (130) divide the arc-extinguishing channel (1222) into a plurality of secondary channels (140). There are a plurality of outlets (1223), and the plurality of outlets (1223) are connected to the plurality of secondary channels (140) in a one-to-one correspondence.
6. The arc-extinguishing assembly (100) according to claim 5, characterized in that, The top and bottom of the mounting housing (120) are provided with a plurality of second partition ribs (150), the plurality of second partition ribs (150) are spaced apart and form a plurality of first channels (160), the first channels (160) are connected to the outlet (1223), and the first channels (160) extend in a direction away from the outlet (1223).
7. The arc-extinguishing assembly (100) according to claim 1, characterized in that, The arc extinguishing assembly (100) also includes two separate grid plate groups, which are respectively disposed at the top and bottom of the mounting housing (120); The grating assembly includes multiple gratings (170), the multiple gratings (170) are spaced apart and form a second channel (180), and the multiple second channels (180) are configured one-to-one with the multiple outlets (1223).
8. The arc-extinguishing assembly (100) according to claim 7, characterized in that, The grid plate (170) includes a first segment (171) and a second segment (172) connected to each other. One end of the first segment (171) extends into the outlet (1223) and the other end extends in a direction away from the outlet (1223). The second segment (172) extends along the side wall of the mounting housing (120).
9. The arc-extinguishing assembly (100) according to claim 1, characterized in that, The arc extinguishing channel (1222) has an inlet (1221) and an outlet (1223) at its two ends, and its sides are closed.
10. A contact system (10), characterized in that, The device includes an operating mechanism, a housing, a moving contact (200), a stationary contact (300), and an arc-extinguishing assembly (100) as described in any one of claims 1-9. The moving contact (200) is rotatably or slidably disposed in the housing. The stationary contact (300) and the arc-extinguishing assembly (100) are both disposed in the housing. The cross-section of the moving contact (200) and the stationary contact (300) is located between the openings of the two second mounting chambers (122).