Arc blow-out coil and main circuit connection structure

Abstract

The utility model relates to the technical field of power switch equipment, and discloses an arc blow-out coil and main circuit connecting structure which comprises an arc extinguish chamber, a static contact and a moving contact, an arc blow-out coil is arranged on the bottom surface of the arc extinguish chamber, and a lower connecting bar is arranged below the arc extinguish chamber. According to the connecting structure of the arc blow-out coil and the main circuit, the metal bending structural member is fixed with the lower connecting row by arranging the metal bending structural member, the arc blow-out coil, the arc extinguish chamber and other components, the other end of the metal bending structural member is in elastic contact with the arc blow-out coil, the arc blow-out coil is connected in the main circuit in series through the metal bending structural member, and the magnetic field direction of the arc blow-out coil is perpendicular to an arc path. The arc extinguishing chamber is used for cooling and extinguishing the arc, stable conduction under thermal deformation or vibration can be ensured through the elastic contact design between the metal bending structural member and the arc blowing coil, the elastic contact design can avoid the poor contact problem of rigid connection, and the service life is prolonged.

Description

Technical Field

[0001] This application relates to the field of power switchgear technology, specifically to a connection structure between an arc-blowing coil and the main circuit. Background Technology

[0002] An arc-blowing coil is a coil that generates a magnetic field within an electric arc region. Its original design purpose is to effectively control and extinguish electric arcs generated in electrical equipment. This type of coil, through connection with the main circuit, uses magnetic force to blow the arc away from the electrodes, accelerating the transfer and extinguishing of the arc. Arc-blowing coil technology is widely used in power equipment such as high-voltage switches, circuit breakers, and disconnecting switches, effectively ensuring the normal operation of the equipment and the safety of operators. In power switchgear, when the main circuit is disconnected, a high-temperature arc is generated instantaneously when the moving and stationary contacts separate. If the arc is not extinguished in time, it may lead to contact erosion, deterioration of insulation materials, or even equipment failure or safety accidents.

[0003] In existing arc extinguishing technologies, common solutions include using an arc extinguishing chamber structure or a magnetic blow-out coil to generate a magnetic field to guide the arc. However, when using traditional structures, the coil and the main circuit are rigidly connected, which is susceptible to vibration or thermal deformation, resulting in poor contact and thus unreliable connection.

[0004] Therefore, there is an urgent need for a technical solution for the connection structure between the arc-blowing coil and the main circuit. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a connection structure between an arc-blowing coil and the main circuit. This structure ensures stable conduction even under thermal deformation or vibration, and its elastic contact design avoids poor contact problems associated with rigid connections, thus extending service life. This solves the problem that traditional structures, due to their rigid connection between the coil and the main circuit, are susceptible to vibration or thermal deformation, leading to poor contact and ultimately unreliable connections.

[0006] To achieve the above objectives, this application provides the following technical solution: a connection structure between an arc-blowing coil and a main circuit, comprising an arc-extinguishing chamber, a stationary contact, and a moving contact. An arc-blowing coil is disposed on the bottom surface of the arc-extinguishing chamber, and a lower connecting bar is disposed below the arc-extinguishing chamber. A metal bending structure is fixedly connected to the upper surface of the lower connecting bar, and the other end of the metal bending structure is in elastic contact with the outer surface of the arc-blowing coil.

[0007] To avoid poor contact issues with rigid connections and ensure stable conduction under thermal deformation or vibration, thus extending service life, the above solution involves installing an arc-blowing coil on the bottom surface of the arc-extinguishing chamber, along with stationary and moving contacts. A lower connecting block is positioned below the arc-extinguishing chamber, and a bent metal structure is fixed to the upper surface of the lower connecting block. The other end of the bent metal structure is connected to the arc-blowing coil in an elastic contact configuration. The arc-blowing coil is connected in series with the main circuit via the bent metal structure, with its magnetic field direction perpendicular to the arc path. The arc-extinguishing chamber is used for cooling and extinguishing the arc. The elastic contact design between the bent metal structure and the arc-blowing coil ensures stable conduction under thermal deformation or vibration, and avoids poor contact issues associated with rigid connections, thereby extending service life.

[0008] Furthermore, a fixed rod is provided below the arc-extinguishing chamber, and a connecting rod is rotatably connected to the outer surface of the fixed rod.

[0009] The above scheme involves placing the fixing rod below the arc-extinguishing chamber and fixing its position. The connecting rod is then mounted on the surface of the fixing rod, and rotation is set between them. The fixing rod is used to limit the movement of the connecting rod.

[0010] Furthermore, the arc-extinguishing chamber is located in the area where the moving and stationary contacts separate.

[0011] With the above scheme, the arc-extinguishing chamber is located in the area where the moving contact and the stationary contact are separated, and is used for cooling and extinguishing the electric arc. When the moving contact and the stationary contact are separated, an electric arc is generated between the contacts. At this time, the arc current flows through the arc-blowing coil. Under the action of the current, the coil generates a strong magnetic field perpendicular to the electric arc, which rapidly elongates the electric arc and introduces it into the arc-extinguishing chamber. The arc-extinguishing chamber achieves the effect of efficient arc extinguishing by cooling and splitting the electric arc.

[0012] Furthermore, a mounting base is rotatably mounted on the inner wall of the connecting rod, and the upper surface of the mounting base is fixedly connected to the bottom surface of the moving contact.

[0013] With the above scheme, the mounting base is set on the inner wall of the connecting rod and is configured to rotate. The bottom surface of the moving contact is connected to the mounting base. When the connecting rod rotates through the fixed rod, the mounting base moves. The mounting base and the connecting rod are hinged, so that the moving contact can contact and connect with the stationary contact, so that the moving contact and the stationary contact are closed, realizing the conduction state.

[0014] Furthermore, a curved plate is fixedly connected to the bottom surface of the mounting base, and the upper surface of the curved plate is fixedly connected to the bottom surface of the lower connecting row.

[0015] With the above scheme, the bent plate is installed on the bottom surface of the mounting base and set as fixed, and the lower connecting row is connected to the bent plate and set as fixed. When the connecting rod drives the mounting base to move, the bent plate and the lower connecting row can move simultaneously.

[0016] Furthermore, a fixing base is fixedly installed on the front of the arc-extinguishing chamber.

[0017] The above method involves installing the mounting base on the front of the arc-extinguishing chamber and fixing it between them to achieve the installation of the mounting base.

[0018] Furthermore, the upper surface of the fixed base is fixedly connected to the bottom surface of the stationary contact.

[0019] The above scheme connects the upper surface of the fixed base to the bottom surface of the stationary contact and sets it to be fixed. By fixing the arc-extinguishing chamber, the fixed base and the stationary contact, the position of the stationary contact remains unchanged. The conduction state and the disconnection state are realized by the contact and disconnection between the stationary contact and the moving contact.

[0020] Furthermore, an upper connecting row is fixedly connected to the left side of the fixing base.

[0021] The above scheme connects the upper connecting bar to the fixed base and sets it to be fixed, thus realizing the installation of the upper connecting bar. When the moving contact and the stationary contact are closed, the current flows through the upper connecting bar, the stationary contact, the moving contact, the lower connecting bar, the metal bending structure and the arc blowing coil in sequence to form a closed circuit.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] This invention relates to a structure for connecting an arc-blowing coil to the main circuit. It incorporates components such as a bent metal structure, an arc-blowing coil, and an arc-extinguishing chamber. The bent metal structure is fixed to the lower connecting bar, while the other end is in elastic contact with the arc-blowing coil. The arc-blowing coil is connected in series with the main circuit via the bent metal structure, with its magnetic field direction perpendicular to the arc path. The arc-extinguishing chamber is used for cooling and extinguishing the arc. The elastic contact design between the bent metal structure and the arc-blowing coil ensures stable conduction even under thermal deformation or vibration. Furthermore, the elastic contact design avoids the poor contact problems of rigid connections, extending service life. When the moving and stationary contacts separate, an arc is generated between them. At this time, the arc current flows through the arc-blowing coil, which generates a strong magnetic field perpendicular to the arc under the influence of the current. This rapidly elongates the arc and introduces it into the arc-extinguishing chamber. The arc-extinguishing chamber achieves efficient arc extinguishing by cooling and dividing the arc. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the entire application;

[0025] Figure 2 This is the overall main view structure diagram of this application;

[0026] Figure 3 This is a structural diagram showing the connection relationship between the connecting strip and the bent plate in this application;

[0027] Figure 4 This is a structural diagram showing the connection relationship between the stationary contact and the fixed base in this application;

[0028] Figure 5 This is a structural diagram showing the connection relationship between the fixed rod and the connecting rod in this application.

[0029] In the picture:

[0030] 1. Upper connecting bar; 2. Lower connecting bar; 3. Stationary contact; 4. Moving contact; 5. Metal bending structure; 6. Arc blowing coil; 7. Arc extinguishing chamber; 8. Bending plate; 9. Fixed rod; 10. Connecting rod; 11. Mounting base; 12. Fixed base. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figure 3 , Figure 4 and Figure 5 In this embodiment, a structure for connecting an arc-blowing coil to the main circuit includes an arc-extinguishing chamber 7, a stationary contact 3, and a moving contact 4. An arc-blowing coil 6 is disposed on the bottom surface of the arc-extinguishing chamber 7, and a lower connecting row 2 is disposed below the arc-extinguishing chamber 7. A metal bending structure 5 is fixedly connected to the upper surface of the lower connecting row 2, and the other end of the metal bending structure 5 is in elastic contact with the outer surface of the arc-blowing coil 6.

[0033] Please see Figure 3 , Figure 4 and Figure 5 A fixed rod 9 is provided below the arc-extinguishing chamber 7. A connecting rod 10 is rotatably connected to the outer surface of the fixed rod 9. The fixed rod 9 is set below the arc-extinguishing chamber 7 and its position is fixed. The connecting rod 10 is installed on the surface of the fixed rod 9 and is set to rotate between them. The fixed rod 9 is used to limit the movement of the connecting rod 10.

[0034] Please see Figure 1 , Figure 2 and Figure 3The arc-extinguishing chamber 7 is located in the separation area between the moving contact 4 and the stationary contact 3. It is used for cooling and extinguishing the electric arc. When the moving contact 4 and the stationary contact 3 are separated, an electric arc is generated between the contacts. At this time, the arc current flows through the arc-blowing coil 6. The coil generates a strong magnetic field perpendicular to the electric arc under the action of the current, which quickly elongates the electric arc and introduces it into the arc-extinguishing chamber 7. The arc-extinguishing chamber 7 achieves the effect of efficient arc extinguishing by cooling and splitting the electric arc.

[0035] Please see Figure 3 and Figure 5 A mounting base 11 is rotatably mounted on the inner wall of the connecting rod 10. The upper surface of the mounting base 11 is fixedly connected to the bottom surface of the moving contact 4. The mounting base 11 is set on the inner wall of the connecting rod 10 and is configured to rotate. The bottom surface of the moving contact 4 is connected to the mounting base 11. When the connecting rod 10 rotates through the fixed rod 9, the mounting base 11 moves. The mounting base 11 and the connecting rod 10 are hinged, so that the moving contact 4 can contact and connect with the stationary contact 3, so that the moving contact 4 and the stationary contact 3 are closed, realizing the conduction state.

[0036] Please see Figure 2 , Figure 4 and Figure 5 A bent plate 8 is fixedly connected to the bottom surface of the mounting base 11. The upper surface of the bent plate 8 is fixedly connected to the bottom surface of the lower connecting row 2. The bent plate 8 is installed on the bottom surface of the mounting base 11 and is fixed. The lower connecting row 2 is connected to the bent plate 8 and is fixed. When the connecting rod 10 drives the mounting base 11 to move, the bent plate 8 and the lower connecting row 2 can move simultaneously.

[0037] Please see Figure 4 A fixing seat 12 is fixedly installed on the front of the arc-extinguishing chamber 7. The fixing seat 12 is installed on the front of the arc-extinguishing chamber 7 and fixed between them to achieve the installation of the fixing seat 12.

[0038] Please see Figure 4 The upper surface of the fixed base 12 is fixedly connected to the bottom surface of the stationary contact 3. The upper surface of the fixed base 12 is connected to the bottom surface of the stationary contact 3 and is set to be fixed. Through the fixing between the arc extinguishing chamber 7, the fixed base 12 and the stationary contact 3, the position of the stationary contact 3 remains fixed. The conduction state and the disconnection state are realized through the contact and disconnection between the stationary contact 3 and the moving contact 4.

[0039] Please see Figure 1 , Figure 2 and Figure 4 The upper connecting bar 1 is fixedly connected to the left side of the fixed base 12. The upper connecting bar 1 is connected to the fixed base 12 and set to be fixed, so as to realize the installation of the upper connecting bar 1. When the moving contact 4 and the stationary contact 3 are closed, the current flows through the upper connecting bar 1, the stationary contact 3, the moving contact 4, and the lower connecting bar 2 in sequence to form a closed circuit.

[0040] In this embodiment, an arc-blowing coil is connected to the main circuit via a structure consisting of a metal bent structure 5, an arc-blowing coil 6, and an arc-extinguishing chamber 7. The metal bent structure 5 is fixed to the lower connecting strip 2, and the other end is in elastic contact with the arc-blowing coil 6. The arc-blowing coil 6 is connected in series with the main circuit via the metal bent structure 5, and its magnetic field direction is perpendicular to the arc path. The arc-extinguishing chamber 7 is used for cooling and extinguishing the arc. The elastic contact design between the metal bent structure 5 and the arc-blowing coil 6 ensures stable conduction even under thermal deformation or vibration. Furthermore, the elastic contact design avoids the contact problems of rigid connections, thus improving service life. When the moving contact 4 separates from the stationary contact 3, an arc is generated between the contacts. At this time, the arc current flows through the arc-blowing coil 6, and the coil generates a strong magnetic field perpendicular to the arc under the action of the current, which rapidly elongates the arc and introduces it into the arc-extinguishing chamber 7. The arc-extinguishing chamber 7 achieves efficient arc extinguishing by cooling and dividing the arc.

[0041] It should be noted that the arc blowing coil 6 can be connected in series with the main circuit through the metal bending structure 5, and its magnetic field direction is perpendicular to the arc path. The metal bending structure 5 can connect the arc blowing coil 6 to form a closed magnetic blowing circuit when the circuit is broken, which also facilitates installation and spatial layout.

[0042] The working principle of the above embodiments is as follows:

[0043] In the conducting state, the coil push rod drives the connecting rod 10 to rotate on the surface of the fixed rod 9, thereby causing the lower connecting bar 2, the bent plate 8, the mounting base 11, and the moving contact 4 to move. At this time, the stationary contact 3 and the moving contact 4 are closed, and the current flows sequentially through the upper connecting bar 1, the stationary contact 3, the moving contact 4, and the lower connecting bar 2, forming a closed circuit. In the disconnecting state, the moving contact 4 is separated from the stationary contact 3, and an electric arc is generated between the contacts. At this time, the arc current flows through the arc-blowing coil 6, and the coil generates a strong magnet perpendicular to the electric arc under the action of the current. The field rapidly elongates the electric arc and introduces it into the arc-extinguishing chamber 7. The arc-extinguishing chamber 7 achieves efficient arc extinguishing by cooling and dividing the arc. The arc current directly drives the magnetic field, shortening the arc extinguishing response time. The elastic contact design between the metal bending structure 5 and the arc-blowing coil 6 ensures stable conduction even under thermal deformation or vibration. Furthermore, the elastic contact design avoids the contact problems of rigid connections, improving service life. In addition, the arc-extinguishing chamber 7 and the magnetic field work together to extinguish arcs with higher current levels, making it suitable for high-voltage scenarios.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A structure for connecting an arc-extinguishing coil to a main circuit, comprising an arc-extinguishing chamber (7), a stationary contact (3), and a moving contact (4), characterized in that: The bottom surface of the arc-extinguishing chamber (7) is provided with an arc-blowing coil (6), and a lower connecting row (2) is provided below the arc-extinguishing chamber (7). A metal bending structure (5) is fixedly connected to the upper surface of the lower connecting row (2), and the other end of the metal bending structure (5) is in elastic contact with the outer surface of the arc-blowing coil (6).

2. The arc-blowing coil and main circuit connection structure according to claim 1, characterized in that: A fixed rod (9) is provided below the arc-extinguishing chamber (7), and a connecting rod (10) is rotatably connected to the outer surface of the fixed rod (9).

3. The arc-blowing coil and main circuit connection structure according to claim 1, characterized in that: The arc-extinguishing chamber (7) is located in the area where the moving and stationary contacts separate.

4. The arc-blowing coil and main circuit connection structure according to claim 2, characterized in that: The inner wall of the connecting rod (10) is rotatably mounted with a mounting base (11), and the upper surface of the mounting base (11) is fixedly connected to the bottom surface of the moving contact (4).

5. The arc-blowing coil and main circuit connection structure according to claim 4, characterized in that: The bottom surface of the mounting base (11) is fixedly connected to a bent plate (8), and the upper surface of the bent plate (8) is fixedly connected to the bottom surface of the lower connecting row (2).

6. The arc-blowing coil and main circuit connection structure according to claim 1, characterized in that: The front of the arc-extinguishing chamber (7) is fixedly installed with a mounting base (12).

7. The arc-blowing coil and main circuit connection structure according to claim 6, characterized in that: The upper surface of the fixed base (12) is fixedly connected to the bottom surface of the stationary contact (3).

8. The arc-blowing coil and main circuit connection structure according to claim 6, characterized in that: The upper connecting row (1) is fixedly connected to the left side of the fixed seat (12).

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