Arc extinction structure and isolating switch
By opening an exhaust hole on the outer wall of the case and communicating with the arc extinguishing cover, the excess gas is discharged, which solves the problem of pressure increase caused by excessive gas in high-voltage or high-current environments, and improves the arc extinguishing stability.
Patent Information
- Application Number
- CN202420792684.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-04-15
AI Technical Summary
In high-voltage or high-current environments, excessive gas generated by the gas production plate will increase the internal pressure of the arc extinguishing cover, which may cause the shell to rupture or seal failure, affecting the normal operation of the isolation switch.
An arc-extinguishing structure is designed, with an exhaust hole in the outer wall of the shell, which is in communication with the arc-extinguishing cover, and the air flow generated by the arc-extinguishing is discharged through the exhaust hole to prevent excessive gas from increasing internal pressure.
It effectively prevents the pressure increase caused by excessive gas, avoids the shell cracking or seal failure, and improves the arc extinguishing stability of the arc extinguishing structure.
Smart Images
Figure CN222883432U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of isolating switches, in particular to an arc extinguishing structure and an isolating switch. Background Art
[0002] The contact system of the disconnector is a key component to ensure the safety and efficiency of power transmission. These systems often face arc problems, which not only threaten the safety of the equipment, but also may cause power loss and reduced operating efficiency. Therefore, an arc extinguishing hood is usually set around the contact system. The arc extinguishing hood has a gas-generating plate. The gas-generating plate produces a large amount of gas under the high temperature of the arc generated when the moving contact and the static contact are disconnected, which can quickly extinguish the arc. However, under high voltage or high current environment, the gas-generating plate will produce more gas. Too much gas will increase the pressure inside the arc extinguishing hood, which may cause the arc extinguishing device shell to rupture or the seal to fail, affecting its normal operation. Utility Model Content
[0003] Therefore, the technical problem to be solved by the utility model is that under high voltage or high current environment, the gas producing plate will produce more gas. Excessive gas will increase the pressure inside the arc extinguishing cover, which may cause the arc extinguishing device shell to rupture or the seal to fail, affecting its normal operation, thereby providing an arc extinguishing structure and an isolating switch.
[0004] In order to solve the above problems, the utility model provides an arc extinguishing structure, comprising:
[0005] A shell, wherein the shell has a through hole, a moving contact is movably arranged in the through hole, a static contact is arranged in the shell, one end of the static contact extends to the through hole and contacts the moving contact, an arc extinguishing hood is arranged on the peripheral side of the through hole, an exhaust hole is opened on the outer wall of the shell, the exhaust hole is connected with the arc extinguishing hood, and the exhaust hole is suitable for discharging the airflow generated by the arc extinguishing of the arc extinguishing hood out of the shell.
[0006] Furthermore, the shell has an air flow channel therein, the air flow channel is arranged between the exhaust hole and the arc extinguishing cover, and the air flow channel is communicated with the exhaust hole and the arc extinguishing cover respectively.
[0007] Furthermore, a concave baffle is provided in the air flow channel, the groove of the concave baffle faces the exhaust hole, and there is a gap between the convex parts on both sides of the concave baffle and the inner wall of the shell. The airflow generated by the arc extinguishing of the arc extinguishing hood is suitable for entering the groove of the concave baffle through the gap and being discharged from the shell from the exhaust hole.
[0008] Furthermore, retaining ribs are arranged on the inner side wall of the shell, and the retaining ribs are respectively arranged on both sides of the exhaust hole.
[0009] Furthermore, one side of the concave baffle has a wind guiding slope.
[0010] Furthermore, the concave baffle and the shell are injection molded.
[0011] Furthermore, a positioning hole is provided on the shell.
[0012] The present invention is an isolating switch, characterized in that it comprises: the arc extinguishing structure described in any one of the above schemes.
[0013] The utility model has the following advantages:
[0014] The utility model discloses an arc extinguishing structure, wherein an exhaust hole is opened on the outer wall of a shell, and the exhaust hole is connected with an arc extinguishing hood. The gas in the arc extinguishing hood can be discharged from the shell through the exhaust hole, thereby ensuring that the gas in the arc extinguishing hood can extinguish the arc and at the same time, exhausting excess gas from the shell, preventing excessive gas from increasing the pressure inside the arc extinguishing hood, resulting in the occurrence of arc extinguishing device shell rupture or sealing failure, and further improving the arc extinguishing stability of the arc extinguishing structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 This is a schematic diagram of the structure of the arc extinguishing structure in the first embodiment of the present utility model;
[0017] Figure 2 This is a schematic diagram of the air flow channel in the first embodiment of the present utility model;
[0018] Description of reference numerals:
[0019] 1. Shell; 2. Moving contact; 3. Static contact; 4. Arc extinguishing cover; 5. Exhaust hole; 6. Air flow channel; 7. Concave baffle; 8. Baffle rib; 9. Wind guide slope; 10. Positioning hole. DETAILED DESCRIPTION
[0020] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] 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.
[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected 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.
[0023] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0024] Embodiment 1
[0025] like Figure 1 and Figure 2 As shown, this embodiment discloses an arc extinguishing structure, including: a housing 1. The housing 1 has a through hole, a moving contact 2 is movably arranged in the through hole, a stationary contact 3 is arranged in the housing 1, one end of the stationary contact 3 extends to the through hole and contacts the moving contact 2, an arc extinguishing hood 4 is arranged on the peripheral side of the through hole, and an exhaust hole 5 is opened on the outer wall of the housing 1, the exhaust hole 5 is connected to the arc extinguishing hood 4, and the exhaust hole 5 is suitable for discharging the airflow generated by the arc extinguishing hood 4 out of the housing 1.
[0026] Specifically, the middle of the housing 1 has a through hole, the moving contact 2 is movably arranged in the through hole, and the housing 1 is provided with a stationary contact 3. One end of the stationary contact 3 that cooperates with the moving contact 2 extends to one side of the through hole and is in the same plane as the inner side wall of the through hole. The moving contact 2 can move in the through hole to connect or disconnect with the stationary contact 3. Figure 1An arc extinguishing hood 4 is respectively provided on the upper and lower sides of the middle through hole. An arc will be generated when the moving contact 2 is disconnected from the static contact 3, and the arc can be guided into the arc extinguishing hood 4. A gas producing plate is provided in the arc extinguishing hood 4. The high temperature of the arc can cause the gas producing plate to produce a large amount of gas and extinguish the arc. An exhaust hole 5 is provided on the outer wall of the shell 1. The exhaust hole 5 is connected to the end of the arc extinguishing hood 4 away from the moving contact 2. The gas in the arc extinguishing hood 4 can be discharged from the shell 1 through the exhaust hole 5, thereby preventing excessive gas from increasing the pressure inside the arc extinguishing hood 4, resulting in the occurrence of rupture of the arc extinguishing device shell 1 or seal failure.
[0027] Furthermore, the housing 1 has an air flow channel 6 therein, the air flow channel 6 is arranged between the exhaust hole 5 and the arc extinguishing hood 4, and the air flow channel 6 is communicated with the exhaust hole 5 and the arc extinguishing hood 4 respectively.
[0028] Specifically, Figure 1 As shown, the air flow channel 6 is arranged on the side of the arc extinguishing hood 4 away from the moving contact 2, and the air flow channel 6 is connected with the exhaust hole 5 and the arc extinguishing hood 4 respectively. The gas in the arc extinguishing hood 4 first flows into the air flow channel 6 and then is discharged from the shell 1 through the exhaust hole 5, thereby preventing the gas from being discharged too quickly, resulting in a small amount of gas in the arc extinguishing hood 4 and being unable to extinguish the arc.
[0029] Furthermore, a concave baffle 7 is provided in the air flow channel 6, the groove of the concave baffle 7 faces the exhaust hole 5, and there is a gap between the convex parts on both sides of the concave baffle 7 and the inner wall of the shell 1. The airflow generated by the arc extinguishing of the arc extinguishing hood 4 is suitable to enter the groove of the concave baffle 7 through the gap and be discharged from the exhaust hole 5 to the shell 1.
[0030] Specifically, Figure 1 and Figure 2 As shown, a concave baffle 7 is arranged in the airflow channel 6, the groove of the concave baffle 7 faces the exhaust hole 5, the side of the concave baffle 7 away from the groove is close to the arc extinguishing cover 4, and there is a gap between the convex parts on both sides of the concave baffle 7 and the inner wall of the shell 1 to form a channel. The gas in the airflow channel 6 enters the groove through the gap and then is discharged from the shell 1 from the exhaust hole 5. The concave baffle 7 mainly extends the path of the arc airflow to discharge from the shell 1, and reduces the airflow speed by increasing the complexity of the path, effectively utilizing the physical obstruction principle to achieve the purpose of eliminating the arc, thereby improving the safety and efficiency of the entire system.
[0031] Further, such as Figure 2 As shown, one side of the concave baffle 7 has a wind guiding inclined surface 9.
[0032] Furthermore, retaining ribs 8 are provided on the inner wall of the shell 1 , and the retaining ribs 8 are respectively provided on both sides of the exhaust hole 5 .
[0033] Specifically, Figure 1 and Figure 2As shown, a baffle 8 is provided on both sides of the exhaust hole 5. The baffle 8 is used to control the airflow direction and provide resistance. The baffle 8 can cooperate with the concave baffle 7 to reduce the gas flow rate.
[0034] Furthermore, the concave baffle 7 and the housing 1 are injection molded.
[0035] Further, such as Figure 1 As shown, the housing 1 is provided with a positioning hole 10. The housing 1 can be fixedly connected to other electrical components through the positioning hole 10.
[0036] Embodiment 2
[0037] This embodiment provides an isolating switch, including: an arc extinguishing structure, and the arc extinguishing structure is the arc extinguishing structure described in the first embodiment.
[0038] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.
Claims
1. An arc extinguishing structure, characterized in that: include: A shell (1), wherein the shell (1) has a through hole, a moving contact (2) is movably arranged in the through hole, a stationary contact (3) is arranged in the shell (1), one end of the stationary contact (3) extends to the through hole and contacts the moving contact (2), an arc extinguishing hood (4) is arranged on the peripheral side of the through hole, an exhaust hole (5) is opened on the outer wall of the shell (1), the exhaust hole (5) is connected to the arc extinguishing hood (4), and the exhaust hole (5) is suitable for discharging the airflow generated by the arc extinguishing hood (4) out of the shell (1).
2. The arc extinguishing structure according to claim 1, characterized in that: The housing (1) has an air flow channel (6) therein, the air flow channel (6) being arranged between the exhaust hole (5) and the arc extinguishing hood (4), and the air flow channel (6) being communicated with the exhaust hole (5) and the arc extinguishing hood (4) respectively.
3. The arc extinguishing structure according to claim 2, characterized in that: A concave baffle (7) is arranged in the air flow channel (6), the groove of the concave baffle (7) faces the exhaust hole (5), and there is a gap between the convex parts on both sides of the concave baffle (7) and the inner wall of the shell (1), and the airflow generated by the arc extinguishing of the arc extinguishing cover (4) is suitable for entering the groove of the concave baffle (7) through the gap and being discharged from the shell (1) from the exhaust hole (5).
4. The arc extinguishing structure according to any one of claims 1 to 3, characterized in that: The inner wall of the shell (1) is provided with retaining ribs (8), and the retaining ribs (8) are respectively arranged on both sides of the exhaust hole (5).
5. The arc extinguishing structure according to claim 3, characterized in that: One side of the concave baffle (7) is provided with an air guiding inclined surface (9).
6. The arc extinguishing structure according to claim 3, characterized in that: The concave baffle (7) and the shell (1) are injection molded.
7. The arc extinguishing structure according to claim 4, characterized in that: The housing (1) is provided with a positioning hole (10).
8. An isolating switch, characterized in that: include: The arc extinguishing structure as claimed in any one of claims 1 to 7.