Arc extinguishing device of disconnecting switch

Abstract

The utility model relates to an arc extinguishing device of an isolating switch, which comprises a shell, and a moving contact, a plurality of static contacts and a plurality of arc extinguishing chambers are arranged in the shell. According to the utility model, the arc extinguish chamber is arranged on the motion trail of the moving contact, so that electric arcs generated in the opening and closing process of the moving contact and the static contact can be quickly captured and extinguished, the arc extinguish efficiency and the safety are effectively improved, the magnet box is arranged on the side wall of one side, close to the arc extinguish chamber, of the shell, and the permanent magnet is arranged in the magnet box. The permanent magnet can absorb impurities such as metal steam and particles generated in the arc extinguishing process, the arc extinguishing chamber is kept clean, the service life of equipment is prolonged, the first airflow channel and the second airflow channel are formed in the two ends, corresponding to the magnet box, of the shell respectively and used for discharging substances absorbed by the permanent magnet, and it is ensured that the impurities are effectively removed; impurities are prevented from being accumulated in the shell, and the reliability and the stability of the equipment are further improved.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switch technology, and in particular to an arc extinguishing device for a disconnecting switch. Background Technology

[0002] In power systems, disconnect switches are crucial electrical equipment, and their reliable operation is essential for the safety and stability of the system. However, during the opening and closing process of disconnect switches, electric arcs often occur between the moving and stationary contacts. This can not only burn the contacts but also cause equipment failure and even affect the stable operation of the entire power system.

[0003] Traditional arc-extinguishing devices for disconnecting switches, while capable of extinguishing arcs to some extent, often suffer from low arc-extinguishing efficiency and difficulty in effectively removing impurities generated during the arc-extinguishing process. Specifically, some arc-extinguishing devices, due to unreasonable structural design, fail to capture and extinguish the arc quickly, thus affecting arc-extinguishing efficiency and safety. At the same time, impurities such as metal vapor and particles generated during the arc-extinguishing process tend to accumulate inside the device, affecting not only the cleanliness of the arc-extinguishing chamber but also potentially adversely impacting the equipment's service life. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an arc extinguishing device for a disconnecting switch that is efficient, reliable and easy to maintain.

[0005] To achieve the above objectives, this utility model employs an arc-extinguishing device for a disconnecting switch, comprising a housing, within which are a moving contact, several stationary contacts, and several arc-extinguishing chambers. The moving contact is disposed within the housing and moves in a circular motion. The stationary contacts are disposed within the housing and cooperate with the moving contact. The arc-extinguishing chambers are arranged along the movement trajectory of the moving contact. A magnet box is provided on the side wall of the housing near the arc-extinguishing chamber, and a permanent magnet is placed inside the magnet box. The housing has a first airflow channel and a second airflow channel at both ends corresponding to the magnet box, for discharging substances attracted by the permanent magnet.

[0006] The beneficial effects of the above structure are as follows: by arranging the arc-extinguishing chamber on the movement trajectory of the moving contact, the arc generated during the opening and closing of the moving and stationary contacts can be quickly captured and extinguished, effectively improving the arc-extinguishing efficiency and safety. The housing has a magnet box on the side wall near the arc-extinguishing chamber, which contains a permanent magnet that can adsorb impurities such as metal vapor and particles generated during the arc-extinguishing process, keeping the arc-extinguishing chamber clean and extending the service life of the equipment. The housing has a first airflow channel and a second airflow channel at both ends of the corresponding magnet box to discharge the substances adsorbed by the permanent magnet, ensuring the effective removal of impurities and preventing impurities from accumulating in the housing, further improving the reliability and stability of the equipment.

[0007] This utility model further comprises a first protrusion and a second protrusion extending outward on the side of the magnet box near the arc-extinguishing chamber. The first protrusion and the second protrusion are located on the upper and lower sides of the magnet box, respectively. The housing is provided with a third protrusion and a fourth protrusion at the positions corresponding to the first protrusion and the second protrusion of the magnet box. The first protrusion and the third protrusion are staggered to form a first airflow channel surrounding the top of the magnet box, and the second protrusion and the fourth protrusion are staggered to form a second airflow channel surrounding the bottom of the magnet box. Through the staggered arrangement of the first and third protrusions and the second and fourth protrusions, a clear airflow path is formed, namely the first airflow channel and the second airflow channel, so that the airflow forms an effective circulation around the magnet box, enhancing the airflow guidance and helping to more efficiently discharge the material attracted by the permanent magnet.

[0008] This invention further features a movable contact positioned within the central region of the housing, moving in a circular motion around that central region. By placing the movable contact within the central region of the housing, the space utilization of the entire arc-extinguishing device becomes more rational. This layout achieves effective movement of the movable contact within the limited space of the housing, thus improving space utilization.

[0009] This invention is further configured such that the stationary contacts are respectively arranged on the central axis of the housing, and are mirror-symmetrical with respect to the axis of the housing. When the moving contact separates from the stationary contact, the generated arc will rapidly spread into the arc-extinguishing chamber. The mirror-symmetrical arrangement of the stationary contacts helps the arc to be more evenly distributed in the arc-extinguishing chamber, allowing the arc-extinguishing grid to cut and cool the arc more effectively, thereby improving the arc-extinguishing performance.

[0010] This invention is further configured such that an arc-extinguishing grid is provided within the arc-extinguishing chamber, the grid being used to cut and cool the electric arc, and the arc-extinguishing chamber is arranged in a mirror-symmetrical layout. The arc-extinguishing grid can cut a long electric arc into multiple short arcs, each with relatively low voltage and energy, making them easier to extinguish. The mirror-symmetrical layout of the arc-extinguishing chambers allows the electric arc to be more evenly distributed within each chamber during diffusion. Each arc-extinguishing grid within the chamber effectively cuts and cools the arc, thereby improving the overall arc-extinguishing efficiency.

[0011] This utility model is further configured with a housing comprising an outer shell, a housing cover mounted on the outer shell, and an upper cover disposed on the assembly of the outer shell and the housing cover. A slot is provided at the connection between the outer shell and the housing cover, and an observation window is embedded within the slot. The upper cover has a slot corresponding to the position of the observation window. The observation window allows personnel to directly observe the internal working status and component condition of the arc-extinguishing device through the window without disassembling the housing. Attached Figure Description

[0012] Figure 1 This is an exploded view of the structure of an embodiment of this utility model.

[0013] Figure 2 This is a front view of the internal structure of the shell according to an embodiment of the present utility model.

[0014] Figure 3 yes Figure 2 A magnified view of a portion of the image.

[0015] Figure 4 This is a perspective view of the internal structure of the shell according to an embodiment of the present utility model.

[0016] Figure 5 yes Figure 4 A magnified view of a portion of the image. Detailed Implementation

[0017] like Figures 1-5 As shown, an embodiment of this utility model provides an arc-extinguishing device for a disconnecting switch, including a housing 1. The housing 1 contains a moving contact 2, two stationary contacts 3, and two arc-extinguishing chambers 4. The housing 1 is composed of an outer shell 11, a housing cover 12 mounted on the outer shell 11, and an upper cover 13 disposed on the assembly of the outer shell 11 and the housing cover 12. A slot is provided at the connection between the outer shell 11 and the housing cover 12, and an observation window 5 is embedded in the slot to facilitate observation of the internal working condition without disassembling the housing 1. The upper cover 13 has a slot 131 corresponding to the position of the observation window 5 for convenient maintenance and repair. The moving contact 2 is disposed in the central area of ​​the housing 1 and moves in a circular motion around the central area and cooperates with the stationary contact 3. The two stationary contacts 3 are respectively disposed on the central axis of the housing 1 and are arranged in a mirror symmetrical layout with respect to the axis of the housing 1. The two arc-extinguishing chambers 4 are arranged on the movement trajectory of the moving contact 2 to ensure that the arc can be quickly captured and extinguished. An arc-extinguishing grid 41 is provided in the arc-extinguishing chamber 4 for cutting and cooling the arc, and the two arc-extinguishing chambers 4 are arranged in a mirror symmetrical layout.

[0018] The housing 1 has a magnet box 6 on the side wall near the arc-extinguishing chamber 4, which contains a permanent magnet 61 for adsorbing impurities generated during the arc extinguishing process. The magnet box 6 has a first protrusion 62 and a second protrusion 63 extending outward on the side near the arc-extinguishing chamber 4, located on the upper and lower sides of the magnet box 4 respectively. The housing 1 has a third protrusion 14 and a fourth protrusion 15 at the positions corresponding to the first protrusion 62 and the second protrusion 63 of the magnet box 4. The first protrusion 62 and the third protrusion 14 are staggered to form a first airflow channel 7 around the top of the magnet box 6. The second protrusion 63 and the fourth protrusion 15 are staggered to form a second airflow channel 8 around the bottom of the magnet box 6.

[0019] Of course, in addition to the above embodiments, this utility model may have other various embodiments. Without departing from the essential technical solution of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, and these changes or modifications are equivalent to the technical solution in this patent. Therefore, these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model, and the utility model creation is in line with the applicant's actual R&D capabilities and resource conditions.

Claims

1. An arc extinguishing device for a disconnector, characterized in that: The application relates to a circuit breaker, which comprises a shell, a moving contact, a plurality of static contacts and a plurality of arc extinguishing chambers, the moving contact is arranged in the shell and performs circular motion, the static contacts are arranged in the shell and matched with the moving contact, the arc extinguishing chambers are arranged on the motion track of the moving contact, a magnet box is arranged on the side wall of the shell close to the arc extinguishing chambers, a permanent magnet is arranged in the magnet box, the shell is provided with a first airflow channel and a second airflow channel at the two ends corresponding to the magnet box, and the first airflow channel and the second airflow channel are used for discharging substances adsorbed by the permanent magnet.

2. The device according to claim 1, characterized in that: The magnet box is provided with a first boss and a second boss extending outward on the side close to the arc extinguishing chambers, the first boss and the second boss are arranged on the upper and lower sides of the magnet box respectively, the shell is provided with a third boss and a fourth boss at the positions corresponding to the first boss and the second boss of the magnet box, the first boss and the third boss are arranged in a staggered mode to form a first airflow channel surrounding the top of the magnet box, and the second boss and the fourth boss are arranged in a staggered mode to form a second airflow channel surrounding the bottom of the magnet box.

3. The device according to claim 1 or 2, characterized in that: The moving contact is arranged in the central region of the shell and performs circular motion around the central region.

4. The device according to claim 3, characterized in that: The static contacts are arranged on the central axis of the shell and arranged in a mirror image mode relative to the axis of the shell.

5. The device according to claim 4, characterized in that: The arc extinguishing chambers are provided with arc extinguishing grids for cutting and cooling electric arcs, and the arc extinguishing chambers are arranged in a mirror image mode.

6. The device according to claim 1, characterized in that: The shell comprises an outer shell, a shell cover mounted on the outer shell and an upper cover arranged on the combination of the outer shell and the shell cover, a clamping groove is arranged at the joint of the outer shell and the shell cover, an observation window is embedded in the clamping groove, and a slot is arranged on the upper cover at the position corresponding to the observation window.

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