Non-polar magnetic blow-out system, contactor

Abstract

The utility model discloses a non-polarity magnetic blowout arc extinguishing system and a contactor, belonging to the technical field of magnetic blowout arc extinguishing of direct current arcs, comprising: two stationary contacts; a contact bridge contacting or disconnecting with the two stationary contacts; an arc extinguishing chamber accommodating the contact bridge; a protective cover connected with the arc extinguishing chamber to form an arc extinguishing cavity; two permanent magnets assembled on the protective cover and corresponding to the two stationary contacts respectively; a magnetic conductive plate forming a closed magnetic circuit with the two permanent magnets; the non-polarity magnetic blowout arc extinguishing system and the contactor can be used for switching on and off direct current circuits, and have the advantages of non-polarity of contacts, no restriction on the use of positive and negative poles, obvious magnetic blowout effect, strong arc extinguishing ability, DC1500V load breaking ability, small size, etc.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnetic blow-out of direct current arcs, and in particular relates to a non-polar magnetic blow-out system and a contactor. Background Art

[0002] As one of the most widely used electrical switches, contactors are in huge demand. Existing DC contactors of the same type have problems such as polarity of contacts, unclear magnetic blowing effect, and poor arc extinguishing ability. Therefore, it is necessary to develop a new non-polarity magnetic blowing arc extinguishing system and contactor to solve the existing problems. Utility Model Content

[0003] The utility model aims to provide a non-polarity magnetic blowout arc extinguishing system and a contactor to solve the problem of poor arc extinguishing capability of a DC contactor.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a non-polarity magnetic blow-out arc system, comprising:

[0005] Two stationary contacts;

[0006] A contact bridge that contacts or disconnects with the two stationary contacts;

[0007] An arc extinguishing chamber accommodating the contact bridge;

[0008] A protective cover connected to the arc extinguishing chamber to form an arc extinguishing cavity;

[0009] Two permanent magnets mounted on the protective cover and corresponding to the two static contacts respectively;

[0010] A magnetic conductive plate forms a closed magnetic circuit with the two permanent magnets.

[0011] Preferably, the two permanent magnets are respectively located between the stationary contact and the magnetic conductive plate.

[0012] Preferably, the “N” pole end of the permanent magnet is close to the stationary contact, and the “S” pole end of the permanent magnet is far away from the stationary contact.

[0013] Preferably, the angle formed by the intersection of the extended line of the midpoint of the stationary contact and the midpoint of the permanent magnet with the central axis of the stationary contact is 50°.

[0014] Preferably, the stationary contact comprises:

[0015] Stationary contact pole;

[0016] A stationary contact point connected to the stationary contact pole;

[0017] Wherein, the static contact pole is provided with a static contact anti-rotation limit straight surface penetrating the arc extinguishing chamber;

[0018] And a static contact anti-pullout limit groove.

[0019] Preferably, the shape of the stationary contact is square; the contact bridge is provided with a square contact bridge contact, and the square contact bridge contact and the stationary contact contact form a cross structure.

[0020] Preferably, the protective cover is provided with a protective cover permanent magnet protective cover wrapping the permanent magnet;

[0021] And the protective cover and permanent magnet anti-fool chamfers matched with the permanent magnet.

[0022] Preferably, the permanent magnet is provided with a permanent magnet polarity identification chamfer that matches the permanent magnet anti-mistake chamfer of the protective cover.

[0023] The utility model further provides a contactor, comprising the above-mentioned non-polarity magnetic blow-out arc system.

[0024] The technical effects and advantages of the utility model are as follows: the non-polarity magnetic blow-out arc extinguishing system and contactor can be used for switching on and off DC circuits, and have the advantages of non-polarity of contacts, no restrictions on the use of positive and negative poles, obvious magnetic blow-out effect, strong arc extinguishing ability, DC1500V load breaking capacity, and small size. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of the non-polarity magnetic blow-out arc system of the utility model;

[0026] Figure 2 For this utility model Figure 1 Sectional view of AA in the middle;

[0027] Figure 3 For this utility model Figure 1 Cross-sectional view of the middle BB;

[0028] Figure 4 It is a structural schematic diagram of the arc extinguishing chamber of the utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the protective cover of the utility model;

[0030] Figure 6 It is a structural schematic diagram of the static contact of the utility model;

[0031] Figure 7 For this utility model Figure 6 Schematic diagram of the structure rotated 180 degrees;

[0032] Figure 8 It is a structural schematic diagram of the contact bridge of the utility model;

[0033] Fig. 9This is a schematic diagram of the structure of the permanent magnet of the utility model;

[0034] Fig.10 This is a three-dimensional diagram of the permanent magnet of the utility model;

[0035] Fig.11 This is a schematic diagram of the installation of the non-polarity magnetic blowout arc extinguishing system of the utility model without the arc extinguishing chamber installed;

[0036] Fig.12 It is a schematic diagram of magnetic induction lines without a magnetic conductive plate of the utility model;

[0037] Fig.13 It is a schematic diagram of magnetic induction lines with a magnetic conductive plate of the utility model;

[0038] Fig.14 This is a schematic front view of the principle of non-polar magnetic blow-out arcing in which the positive pole of the utility model is the 1# static contact pole;

[0039] Fig.15 It is a top view schematic diagram of the non-polarity magnetic blow-out arc-extinguishing principle of the utility model, in which the positive pole is the 1# static contact pole;

[0040] Fig.16 It is a left view schematic diagram of the non-polarity magnetic blow-out arc-extinguishing principle of the utility model, in which the positive pole is the 1# static contact pole;

[0041] Fig.17 It is a left view schematic diagram of the non-polarity magnetic blow-out arc-extinguishing principle of the utility model with the negative pole being the 2# static contact pole;

[0042] Fig.18 This is a schematic front view of the principle of non-polar magnetic blow-out arcing in which the positive pole of the utility model is the 2# static contact pole;

[0043] Fig.19 It is a top view schematic diagram of the non-polarity magnetic blow-out arc-extinguishing principle of the utility model, in which the positive pole is the 2# static contact pole;

[0044] Fig. 20 It is a left view schematic diagram of the non-polarity magnetic blow-out arc-extinguishing principle of the utility model, in which the negative pole is the 1# static contact pole;

[0045] Fig.21 It is a left view schematic diagram of the non-polar magnetic blow-out arc-extinguishing principle of the utility model in which the positive pole is the 2# static contact pole.

[0046] In the figure: 101, magnetic conductive plate; 102, permanent magnet; 102-1, chamfer of permanent magnet polarity mark; 103, contact bridge; 103-1, square contact of contact bridge; 104, static contact; 104-1, square contact of static contact; 104-2, anti-rotation limit surface of static contact; 104-3, anti-pull-out limit groove of static contact; 104-4, static contact pole; 105, protective cover; 105-1, protective cover permanent magnet protective cover; 105-2, anti-stupid chamfer of permanent magnet of protective cover; 106, arc extinguishing chamber. DETAILED DESCRIPTION

[0047] 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.

[0048] The utility model provides Figure 1 , Figure 3 , Fig.12 A non-polarity magnetic blow-out arc extinguishing system as shown in the figure comprises a magnetic conductive plate 101, a permanent magnet 102, a contact bridge 103, a static contact 104, and a protective cover 105 connected in sequence from bottom to top, as shown in the figure. Figure 2 As shown, the permanent magnet 102 is placed at the lower left corner or lower right corner of the stationary contact 104 and the contact bridge 103, and the "N" pole and the "S" pole of the permanent magnet 102 are placed up and down, and are placed above the magnetic conductive plate 101; the permanent magnet 102 and the magnetic conductive plate 101 form a closed magnetic circuit; at this position, the magnetic induction lines of the permanent magnet 102 are concentrated on the magnetic conductive plate 101 on one side and concentrated in the gap between the stationary contact 104 and the contact bridge 103 on the other side. This position is most conducive to magnetic blowing out the arc, and the magnetic blowing effect is obvious;

[0049] The permanent magnet 102 and the magnetic plate 101 form a closed magnetic circuit; the two permanent magnets 102 and the magnetic plate 101 constitute a magnetic structure: the magnetic structure is a part of the non-polarity magnetic blow-out arc system. With the magnetic structure, the magnetic blow-out arc circuit is more efficient.

[0050] The permanent magnet 102 is placed at the lower left corner or lower right corner of the stationary contact 104 and the contact bridge 103 at an angle of about 50°. The "N" pole and the "S" pole of the permanent magnet 102 are placed up and down and placed above the magnetic conductive plate 101. The permanent magnet 102 and the magnetic conductive plate 101 form a closed magnetic circuit. At this position, the magnetic induction lines of the permanent magnet 102 are concentrated on the magnetic conductive plate 101 on one side and in the gap between the stationary contact 104 and the contact bridge 103 on the other side. This position is most conducive to magnetic blowing out arcs, and the magnetic blowing effect is obvious.

[0051] The magnetic induction lines of the permanent magnet 102 are concentrated on the magnetic conductive plate 101 on one side and on the gap between the static contact 104 and the contact bridge 103 on the other side.

[0052] like Fig. 9 , Fig.10 As shown, a permanent magnet 102 having a permanent magnet polarity identification chamfer 102-1 is provided;

[0053] like Figure 6 , Figure 7 As shown, a stationary contact 104 having a stationary contact square contact 104-1 is provided;

[0054] like Figure 8 As shown, a contact bridge 103 having square contact bridge points 103-1 is provided;

[0055] like Figure 5 As shown, a protective cover 105 having a permanent magnet protective cover 105-1 or a protective cover 105 having a permanent magnet anti-fouling chamfer 105-2;

[0056] The function of the permanent magnet 102 is to change the arc direction by using the magnetic induction line, lengthen and cool the arc and extinguish the arc;

[0057] The function of the magnetic plate 101 is to change the direction of the magnetic induction line of the magnetic blow-out arc, and to gather and shrink it, with an effect similar to that of light beam focusing; it is a magnetic conductive part of the electromagnetic coil; it is a limit baffle of the action structure; and it strengthens the structural strength of the arc extinguishing cavity.

[0058] The permanent magnet polarity identification chamfer 102-1 corresponds to the protective cover permanent magnet anti-fool chamfer 105-2, anti-fool matching, and convenient assembly;

[0059] The square contact 104-1 of the static contact and the square contact 103-1 of the contact bridge are in a cross position, which not only ensures the contact area and current carrying capacity of the contacts, but also facilitates the rapid transfer of the arc and reduces arc erosion on the contact surface;

[0060] Function of the protective cover 105: The protective cover permanent magnet protective cover 105-1 wraps the permanent magnet 102 to prevent the permanent magnet 102 from being burned by a strong arc and degrading its magnetic force; Figure 4 As shown, it forms an arc extinguishing cavity with the arc extinguishing chamber 106 to prevent the arc from leaking out;

[0061] Principle of non-polarity magnetic blow-out arc extinguishing system: Figure 12-Figure 21As shown, direct current has positive and negative poles, and the arcs are blown diagonally, which achieves non-polarity; magnetic arc blowing out stretches the arc and extinguishes it; the role of the permanent magnet 102 is to use the magnetic induction lines to change the direction of the arc, stretch the cooling arc and extinguish the arc; the role of the magnetic plate 101 is to change the direction of the magnetic induction lines of the magnetic arc blowing out, and gather and shrink them; the arc (current beam) is affected by the magnetic induction lines and will change the direction of movement; in order to achieve non-polarity, the position of the permanent magnet is set at the above position, and the arc is blown out with a staggered position; when the current is reversed, the arc direction is also opposite, and the arc is still blown out with a staggered position; that is to say, the arc blowing direction changes with the current direction but will not cross.

[0062] The utility model further provides a contactor, comprising the above-mentioned non-polarity magnetic blow-out arc system.

[0063] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A non-polarity magnetic blow-out arc system, characterized in that: include: two stationary contacts (104); A contact bridge (103) that contacts or disconnects from the two stationary contacts (104); An arc extinguishing chamber (106) accommodating the contact bridge (103); A protective cover (105) connected to the arc extinguishing chamber (106) to form an arc extinguishing cavity; Two permanent magnets (102) mounted on the protective cover (105) and corresponding to the two stationary contacts (104) respectively; A magnetic conductive plate (101) that forms a closed magnetic circuit with the two permanent magnets (102).

2. A non-polarity magnetic blow-out arc extinguishing system according to claim 1, characterized in that: The two permanent magnets (102) are respectively located between the stationary contact (104) and the magnetic conductive plate (101).

3. The non-polarity magnetic blow-out arc extinguishing system according to claim 1, characterized in that: The "N" extreme end of the permanent magnet (102) is close to the stationary contact (104), and the "S" extreme end of the permanent magnet (102) is far away from the stationary contact (104).

4. A non-polarity magnetic blow-out arc extinguishing system according to claim 3, characterized in that: The angle formed by the intersection of the extended line of the midpoint of the stationary contact (104) and the midpoint of the permanent magnet (102) and the central axis of the stationary contact (104) is 50°.

5. The non-polarity magnetic blow-out arc extinguishing system according to any one of claims 1 to 4, characterized in that: The stationary contact (104) comprises: Stationary contact pole (104-4); A stationary contact point (104-1) connected to the stationary contact pole (104-4).

6. A non-polarity magnetic blow-out arc extinguishing system according to claim 5, characterized in that: The static contact point (104-1) is in a square shape; the contact bridge (103) is provided with a square contact bridge contact (103-1), and the square contact bridge contact (103-1) and the static contact point (104-1) form a cross structure.

7. The non-polarity magnetic blow-out arc system according to claim 1, characterized in that: The protective cover (105) is provided with a protective cover permanent magnet protective shield (105-1) that wraps the permanent magnet (102); and a permanent magnet anti-fool chamfer (105-2) of the protective cover matched with the permanent magnet (102).

8. The non-polarity magnetic blow-out arc extinguishing system according to claim 7, characterized in that: The permanent magnet (102) is provided with a permanent magnet polarity identification chamfer (102-1) that matches the permanent magnet anti-mistake chamfer (105-2) of the protective cover.

9. A non-polarity magnetic blow-out arc extinguishing system according to claim 5, characterized in that: The static contact pole (104-4) is provided with a static contact anti-rotation limiting straight surface (104-2) that penetrates the arc extinguishing chamber (106); And a static contact anti-pullout limit groove (104-3).

10. A contactor, characterized in that: A non-polarity magnetic arc extinguishing system comprising any one of claims 1-9.

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