Contactor magnetic blow-out arc structure

Abstract

The utility model discloses a contactor magnetic blow-out arc structure, which relates to the technical field of electric switches and comprises an arc extinguish chamber main body, a contactor main body and a pair of arc blow-out coils, magnetic conductive plates are arranged on the front side wall and the rear side wall of the arc extinguish chamber main body, and the arc extinguish chamber main body is arranged on the contactor main body. A movable contact plate is arranged in the center of the upper surface of the contactor body, static contact plates are arranged on the two sides of the upper surface of the contactor body respectively, static contacts are arranged at one ends of the inner sides of the two static contact plates, movable contacts are arranged at the two ends of the movable contact plate, and the static contacts and the movable contacts can form an attached state or a separated state. According to the utility model, the arc blow-out coil is additionally arranged on the basis of the existing permanent magnet arc blow-out, so that when the main loop is broken, the arc blow-out coil generates a magnetic field through the breaking current of the main loop, the magnetic field intensity of the arc blow-out coil is further enhanced, the magnetic field intensity of the arc blow-out coil is in direct proportion to the breaking current of the main loop, and the larger the current is, the larger the arc blow-out magnetic field is.

Description

Technical Field

[0001] The utility model relates to the technical field of electric switches, in particular to a contactor magnetic blowout arc structure. Background Art

[0002] In the DC contactors commonly seen in the current market, the arc blowing magnetic field is usually generated by permanent magnets. By distributing the magnetic field of the permanent magnets on both sides of the contactor contact break, when the DC contactor is disconnected, the DC arc generated at the break can be blown away from the break and into the arc extinguishing chamber by the arc blowing magnetic field. However, this method of using permanent magnets for arc blowing is limited by the size and magnetic field strength of the permanent magnets, and the arc blowing effect is poor. If you want to obtain a better arc blowing effect, you need a larger permanent magnet, which will increase the cost and volume of the contactor. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the utility model provides a contactor magnetic arc blowing structure, which adds an arc blowing coil on the basis of the existing permanent magnet arc blowing. When the main circuit is disconnected, the arc blowing coil generates a magnetic field through the main circuit disconnecting current, thereby enhancing the arc blowing magnetic field strength. The magnetic field strength of the arc blowing coil is proportional to the main circuit disconnecting current. The larger the current, the larger the arc blowing magnetic field, thereby improving the arc blowing effect.

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a contactor magnetic arc blowing structure, including an arc extinguishing chamber body, a contactor body and a pair of arc blowing coils, the front and rear side walls of the arc extinguishing chamber body are provided with magnetic conductive plates, the arc extinguishing chamber body is arranged on the contactor body, a moving contact plate is arranged at the center of the upper surface of the contactor body, static contact plates are arranged on both sides of the upper surface of the contactor body, static contacts are arranged at one end of the inner side of the two static contact plates, and moving contacts are arranged at both ends of the moving contact plate, and the static contacts and the moving contacts can form a fitting state or The arc blowing coils are arranged on the left and right sides of the arc extinguishing chamber body, and both ends are connected to the magnetic conductive plates on the front and rear side walls. The lower end of the arc blowing coil is electrically connected to the static contact plate, and the upper end is electrically connected to the arc striking plate. The inner ends of the arc striking plates on both sides extend into the interior of the arc extinguishing chamber body. A permanent magnet is arranged between the arc striking plate and the static contact plate and is located close to the static contact and the moving contact. Both ends of the permanent magnet are connected to the magnetic conductive plates on the front and rear side walls. The current of the arc blowing coil is proportional to the current conducted when the moving contact plate and the static contact plate are in a fitted state.

[0005] Preferably, the magnetic conductive plate includes a first magnetic conductive plate and a second magnetic conductive plate, the first magnetic conductive plate is covered at both ends of the permanent magnet and extends to a position between a static contact and a moving contact, and the second magnetic conductive plate is covered at both ends of the arc blowing coil and extends to a position between the static contact and the moving contact.

[0006] Preferably, the arc blowing coil comprises a skeleton, an iron core and a copper coil, wherein the copper coil is arranged on the iron core and is wound and installed through the skeleton, and both ends of the iron core are connected to the magnetic conductive plate.

[0007] Preferably, the static contact and the moving contact are circular respectively.

[0008] Preferably, the iron core and the magnetic conductive plate are fixed by bolts.

[0009] The utility model provides a contactor magnetic blowout arc structure, which has the following beneficial effects:

[0010] The utility model adds an arc blowing coil on the basis of the existing permanent magnet arc blowing, so that when the main circuit is disconnected, the arc blowing coil generates a magnetic field through the main circuit disconnecting current, thereby enhancing the arc blowing magnetic field strength, and the magnetic field strength of the arc blowing coil is proportional to the main circuit disconnecting current. The larger the current, the larger the arc blowing magnetic field, thereby improving the arc blowing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a front view of the overall magnetic arc blowing structure of a contactor of the utility model;

[0012] Figure 2 This is a schematic diagram of a magnetic arc blowing structure of a contactor of the utility model;

[0013] Figure 3 The utility model is a schematic diagram of an arc blowing coil in a contactor magnetic arc blowing structure.

[0014] In the figure: 1. arc blowing coil; 2. moving contact; 3. moving contact plate; 4. arc striking plate; 5. permanent magnet; 6. static contact; 7. first magnetic conductive plate; 8. second magnetic conductive plate; 9. static contact plate; 10. bolt; 11. iron core; 12. frame; 13. copper coil; 14. arc extinguishing chamber body; 15. contactor body. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0016] like Figure 1-3As shown, a contactor magnetic arc blowing structure comprises an arc extinguishing chamber body 14, a contactor body 15 and a pair of arc blowing coils 1, the front and rear side walls of the arc extinguishing chamber body 14 are provided with magnetic conductive plates, the arc extinguishing chamber body 14 is arranged on the contactor body 15, a moving contact plate 3 is arranged at the center position of the upper surface of the contactor body 15, static contact plates 9 are arranged on both sides of the upper surface of the contactor body 15, static contact points 6 are arranged at one end of the inner side of the two static contact plates 9, and moving contacts 2 are arranged at both ends of the moving contact plate 3, the static contact points 6 and the moving contacts 2 can form a fitting state or a separation state, and are located between a pair of magnetic conductive plates, a pair of arc blowing coils 1 are arranged on the left and right sides of the arc extinguishing chamber body 14, and the two ends are connected to the magnetic conductive plates of the front and rear side walls, the lower end of the arc blowing coil 1 is electrically connected to the static contact plate 9, and the upper end is electrically connected to the arc starting plate 4, and the inner ends of the arc starting plates 4 on both sides extend to the inside of the arc extinguishing chamber body 14, A permanent magnet 5 is arranged between the arc striking plate 4 and the static contact plate 9 and is located near the static contact 6 and the moving contact 2. The two ends of the permanent magnet 5 are connected to the magnetic conductive plates on the front and rear side walls. The current of the arc blowing coil 1 is proportional to the current conducted when the moving contact plate 3 and the static contact plate 9 are in a fitted state; the arc blowing coil 1 includes a skeleton 12, an iron core 11 and a copper coil 13. The copper coil 13 is arranged on the iron core 11 and is wound and installed through the skeleton 12. The two ends of the iron core 11 are connected to the magnetic conductive plates; the magnetic conductive plates include a first magnetic conductive plate 7 and a second magnetic conductive plate 8. The first magnetic conductive plate 7 covers the two ends of the permanent magnet 5 and extends to the position between the static contact 6 and the moving contact 2. The second magnetic conductive plate 8 covers the two ends of the arc blowing coil 1 and extends to the position between the static contact 6 and the moving contact 2. The iron core 11 and the magnetic conductive plate are fixed by bolts 10. The static contact 6 and the moving contact 2 are circular respectively.

[0017] The detailed connection means are well-known in the art. The following mainly introduces the working principle and process, which are as follows:

[0018] In order to enable personnel to clearly see the internal structure of the utility model, the arc extinguishing chamber in the arc extinguishing chamber body 14 is not drawn in the attached drawings of the specification book. The specific position is at one end of the inner side of the arc striking plates 4 on both sides. This design is the prior art. In addition, the contactor body 15 and the arc extinguishing chamber body 14 are all prior art, which can be well understood by those skilled in the art.

[0019] According to the instruction manual Figure 1-3It can be known that when the utility model is working, the magnetic field of the permanent magnet 5 is conducted to the break between the static contact 6 and the moving contact 2, and the magnetic field blows the arc between the break to the arc extinguishing chamber, and the arc-starting plate 4 can play a guiding role. On this basis, in the main circuit, that is, when the moving contact 2 is separated from the static contact 6, the arc blowing coil 1 generates a magnetic field by breaking the current of the main circuit, thereby enhancing the intensity of the arc blowing magnetic field, and improving the effect of blowing the arc to the arc extinguishing chamber, and the magnetic field intensity of the arc blowing coil 1 is proportional to the breaking current of the main circuit. The larger the current, the larger the arc blowing magnetic field, and the arc blowing effect is improved. Here, the arc blowing coil 1 includes a skeleton 12, an iron core 11 and a copper coil 13. The copper coil 13 is arranged on the iron core 11 and is wound and installed through the skeleton 12. The two ends of the iron core 11 are connected to the magnetic conductive plate. Of course, the iron core 11 and the magnetic conductive plate can be fixed by bolts 10. The structure of the arc blowing coil 1 is simple and easy to repair and maintain. It should be understood that the current of the arc blowing coil 1 is indeed proportional to the main circuit in the working state, but the state in which the arc blowing coil 1 generates current is generated during the separation process of the moving contact plate 3 and the static contact plate 9. When the moving contact plate 3 and the static contact plate 9 are in the closed state, no current flows in the arc blowing coil 1.

[0020] The magnetic conductive plate includes a first magnetic conductive plate 7 and a second magnetic conductive plate 8. The first magnetic conductive plate 7 is arranged to cover both ends of the permanent magnet 5 and extends to the position between the static contact 6 and the moving contact 2. The second magnetic conductive plate 8 is arranged to cover both ends of the arc blowing coil 1 and extends to the position between the static contact 6 and the moving contact 2. The magnetic conductive plate is designed to be split, which is convenient for disassembly and installation, and provides convenience for repair and maintenance.

[0021] Among them, the static contact 6 and the moving contact 2 are respectively circular, and the connection is accurate and stable.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A contactor magnetic blown arc structure, characterized in that: The invention comprises an arc extinguishing chamber body (14), a contactor body (15) and a pair of arc blowing coils (1), wherein the front and rear side walls of the arc extinguishing chamber body (14) are provided with magnetic conductive plates, the arc extinguishing chamber body (14) is arranged on the contactor body (15), a moving contact plate (3) is arranged at the center position of the upper surface of the contactor body (15), static contact plates (9) are arranged on both sides of the upper surface of the contactor body (15), static contacts (6) are arranged at one end of the inner side of the two static contact plates (9), moving contacts (2) are arranged at both ends of the moving contact plate (3), and the static contacts (6) and the moving contacts (2) can form a fitted state or a separated state, and are located between the pair of magnetic conductive plates. A pair of arc blowing coils (1) are arranged on the left and right sides of the arc extinguishing chamber body (14), and both ends are connected to the magnetic conductive plates on the front and rear side walls. The lower end of the arc blowing coil (1) is electrically connected to the static contact plate (9), and the upper end is electrically connected to the arc striking plate (4). The inner ends of the arc striking plates (4) on both sides extend into the interior of the arc extinguishing chamber body (14). A permanent magnet (5) is arranged between the arc striking plate (4) and the static contact plate (9) and is located near the static contact point (6) and the moving contact point (2). Both ends of the permanent magnet (5) are connected to the magnetic conductive plates on the front and rear side walls. The current of the arc blowing coil (1) is proportional to the current conducted when the moving contact plate (3) and the static contact plate (9) are in a state of being in contact.

2. A contactor magnetic blown arc structure according to claim 1, characterized in that: The magnetic conductive plate comprises a first magnetic conductive plate (7) and a second magnetic conductive plate (8), wherein the first magnetic conductive plate (7) is arranged to cover the two ends of the permanent magnet (5) and extends to a position between the static contact (6) and the moving contact (2), and the second magnetic conductive plate (8) is arranged to cover the two ends of the arc blowing coil (1) and extends to a position between the static contact (6) and the moving contact (2).

3. A contactor magnetic blowout arc structure according to claim 1, characterized in that: The arc blowing coil (1) comprises a frame (12), an iron core (11) and a copper coil (13); the copper coil (13) is arranged on the iron core (11) and is wound and installed through the frame (12); and two ends of the iron core (11) are connected to magnetic conductive plates.

4. A contactor magnetic blown arc structure according to claim 1, characterized in that: The static contact (6) and the movable contact (2) are respectively circular.

5. A contactor magnetic blown arc structure according to claim 3, characterized in that: The iron core (11) and the magnetic conductive plate are fixed by bolts (10).

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