Arc extinguishing system for enhancing magnetic blow-out effect

Abstract

An arc extinguishing system capable of enhancing a magnetic blow-out effect comprises a contact system and an arc extinguishing chamber, the contact system comprises a moving contact and a static contact, electric arcs generated by breaking of the moving contact and the static contact are extinguished through an arc extinguishing grid sheet in the arc extinguishing chamber and then are discharged, the moving contact comprises an arc contact and a main contact, and the main contact is arranged in the arc extinguishing chamber. And a permanent magnet is arranged at a corresponding position beside the arc contact, and the magnetic field of the permanent magnet can lengthen an electric arc generated by breaking the moving contact and the static contact and blow the electric arc to the side surface position of the arc extinguish chamber to extinguish the electric arc at the same time. According to the arc extinguishing system, the permanent magnet is arranged in the corresponding area of the arc contact, and the arc is lengthened by using the strong magnetic field force of the permanent magnet, so that the high-voltage arc can be smoothly extinguished. Meanwhile, the permanent magnet blows the electric arc to the side surface position of the arc extinguishing chamber, so that the electric arc is cut and extinguished by the arc extinguishing grid sheets as many as possible.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of low-voltage apparatus, specifically speaking, it is related to an arc extinguishing system with enhanced magnetic blow effect. BACKGROUND

[0002] In the field of existing low-voltage apparatus, the voltage that can be withstood by a direct-current switch can only reach DC 1500V. According to the latest development needs of the low-voltage apparatus industry, the current voltage that needs to be withstood by a direct-current switch will develop to AC 2000V and DC 3000V. At present, the product can only reach single-pole DC 750V and two-pole DC 1500V, and the products on the market cannot meet the standard requirements of DC 2500V. Traditionally, a DC 1500V product is usually formed by 4P two-by-two series connection, but the 4P product is large in size and high in cost; in order to reduce the cost, 2P / DC 1500V and 2P / DC 2000V products have appeared on the market, but the 2P / DC 1500V and 2P / DC 2000V product needs to withstand a higher voltage per P, which leads to the situation that the arc of each single pole of the 2P product cannot be extinguished due to the excessively high single-pole voltage division and insulation failure occurs. As shown in the accompanying drawings, the contact is divided into a main contact and an arc contact, and the gas generating member extends between the main contact and the arc contact. When the switch is opened, the arc mainly occurs on the arc contact, and the arc generated by the arc contact enters the arc extinguishing grid piece through the gas channel and is sprayed to the outside. However, the structure of this contact system is applied in the process of high-voltage products, and the high-voltage arc generated by the separation of the moving contact and the stationary contact cannot be completely extinguished by the arc extinguishing grid piece, so that the high-voltage arc generated during the separation has no discharge channel, which leads to serious arcing and arc failure. Figure 1 Utility model content

[0003] The utility model aims at the defect that the separation arc cannot be completely extinguished by the arc extinguishing grid piece in the existing high-voltage circuit breaker product, which leads to arc failure. An arc extinguishing system with enhanced magnetic blow effect is provided, permanent magnets are arranged in the corresponding area of the arc contact, the strong magnetic field force of the permanent magnet is used to lengthen the arc, so that the high-voltage arc can be smoothly extinguished. At the same time, the permanent magnet blows the arc to the side position of the arc extinguishing chamber, so that the arc is cut and extinguished by as many arc extinguishing grid pieces as possible.

[0004] Technical scheme

[0005] ​In order to achieve the above technical purpose, the utility model provides a kind of arc extinguishing system of enhanced magnetic blow effect, it includes contact system and arc extinguishing chamber, the contact system includes movable contact and static contact, the electric arc generated by the movable contact and static contact breaking is extinguished after passing through arc extinguishing grid piece in arc extinguishing chamber and is discharged, the movable contact includes arc contact and main contact, it is characterized by: corresponding position is arranged with permanent magnet in the side of arc contact, the magnetic field of the permanent magnet can lengthen the electric arc generated by the movable contact and static contact breaking simultaneously blow electric arc to the side position of arc extinguishing chamber so that electric arc is extinguished.

[0006] In one embodiment, the permanent magnet is arranged in the side of the arc contact.

[0007] In one embodiment, the permanent magnet is arranged in the space between the at least two arc contacts arranged side by side.

[0008] In one embodiment, the permanent magnet is embedded in the cavity formed by the arc contacts arranged side by side.

[0009] In one embodiment, the permanent magnet is arranged at one end of the arc contact close to the arc contact point.

[0010] In one embodiment, the magnetic pole direction of the permanent magnet points to the inside of the arc extinguishing chamber at one end and points away from the arc extinguishing chamber at the other end.

[0011] In one embodiment, the permanent magnet is fixed in the side of the arc contact in the arrangement direction of the arc contact and the main contact, and is located on the side of the arc contact close to the main contact.

[0012] In one embodiment, the magnetic pole direction of the permanent magnet points to both ends in the arrangement direction of the arc contact and the main contact.

[0013] In one embodiment, the permanent magnet is arranged on the side of the arc contact away from the arc contact point.

[0014] In one embodiment, the permanent magnet is arranged on the same side of the arc contact as the arc contact point.

[0015] Advantages

[0016] The utility model provides a kind of arc extinguishing system of reinforcing magnetic blow effect, it includes contact system and arc extinguishing chamber, the contact system includes movable contact and static contact, the electric arc generated by movable contact and static contact breaking is discharged after being extinguished by arc extinguishing grid piece in arc extinguishing chamber, the movable contact includes arc contact and main contact, the corresponding position of arc contact is equipped with permanent magnet, the magnetic field of permanent magnet can lengthen the electric arc generated by movable contact and static contact breaking simultaneously blow electric arc to the side position of arc extinguishing chamber so that electric arc is extinguished.This arc extinguishing system arranges permanent magnet in the corresponding area of arc contact, lengthen electric arc using the powerful magnetic field force of permanent magnet, so that high-voltage electric arc can be extinguished smoothly.Simultaneously, permanent magnet blows electric arc to the side position of arc extinguishing chamber, so that electric arc is cut off and extinguished by as many arc extinguishing grid pieces as possible. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0018] FIG. Figure 1 It is the structure schematic diagram of arc extinguishing system in prior art;

[0019] FIG. Figure 2 It is the structure schematic diagram of arc extinguishing system in the embodiment 1 of the utility model Figure 1 ;

[0020] FIG. Figure 3 It is the structure schematic diagram of arc extinguishing system in the embodiment 1 of the utility model Figure 2 ;

[0021] FIG. Figure 4 It is the three-dimensional schematic diagram of arc extinguishing system in the embodiment 1 of the utility model;

[0022] FIG. Figure 5 It is the permanent magnet position schematic diagram in the embodiment 1 of the utility model;

[0023] FIG. Figure 6 It is the permanent magnet position schematic diagram in the embodiment 2 of the utility model;

[0024] FIG. Figure 7 It is the permanent magnet position schematic diagram in the embodiment 3 of the utility model; DETAILED DESCRIPTION

[0025] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely explain the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort should fall into the scope of the present application.

[0026] It should be noted that when a component is referred to as being "on" or "disposed on" another component, it can be directly on the other component or there can be intervening components. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be intervening components. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms as used in the present specification are for purposes of description and not of limitation unless otherwise noted.

[0027] In addition, the terms "first", "second", and the like, are used only to describe the objects and do not imply or suggest relative importance or a quantity of the specified technical features. Thus, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, and the like, unless otherwise explicitly specified and limited.

[0028] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above", and "over" of a first feature to a second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "above", "over", and "on" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature. The "below", "under", and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the first feature is horizontally lower than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0030] Embodiment 1

[0031] As shown in the accompanying Figure 1As shown in the figure, in the prior art, the traditional contact system structure is used in the process of high voltage products. The high voltage arc generated by the disconnection of the moving contact and the static contact cannot be completely extinguished by the arc extinguishing grid, resulting in the high voltage arc generated during disconnection due to the lack of a discharge channel, causing serious arcing, and further leading to arc extinguishing failure. In order to solve this problem, as shown in the attached figure, Figure 2 , as shown in Figures 3 and 4, this embodiment provides an arc extinguishing system for enhancing the magnetic blow effect, which includes a contact system a and an arc extinguishing chamber b, wherein the contact system a includes a moving contact 1 and a static contact 2, and the arc generated by the disconnection of the moving contact 1 and the static contact 2 is extinguished through the arc extinguishing grid 3 in the arc extinguishing chamber b and then discharged, and the moving contact 1 includes an arc contact 101 and a main contact 102, and the arc contact 101 and the main contact 102 are separated and placed in different areas by an insulating member 5, and the arc contact 101 adopts the form of closing first and then opening, so that the arc generated when opening the switch mainly starts on the arc contact 101.

[0032] A permanent magnet 4 is arranged at a corresponding position beside the arcing contact 101. The permanent magnet 4 is fixed on the arcing contact 101 and is located beside the arcing contact 101. Figure 5 As shown, in this embodiment, the permanent magnet 4 is arranged in the space between the at least two arcing contacts 101. One end of the magnetic pole of the permanent magnet 4 points into the arc extinguishing chamber b, and the other end points away from the arc extinguishing chamber b, thereby achieving non-polarity.

[0033] The magnetic field of the permanent magnet 4 can stretch the arc generated by the disconnection of the moving contact 1 and the static contact 2, and at the same time blow the arc toward the side of the arc extinguishing chamber b, so that the arc is stretched, cut and extinguished by as many arc extinguishing grids 3 as possible, or contact with the insulating member 5 to generate gas and accelerate the extinguishing. Then, the arc generated by the disconnection of the moving contact 1 and the static contact 2 is blown toward the side of the arc extinguishing chamber b by the magnetic field of the permanent magnet 4, and then discharged through the exhaust port at the rear end of the arc extinguishing chamber b. In detail, as shown in the attached figure, Figure 2 As shown, according to the left-hand rule, due to the magnetic field force F of the permanent magnet, when the current is from the static contact 2 to the moving contact 1 in the figure, it blows upward; when the current is Figure 3 When the direction is from the moving contact 1 to the static contact 1, the arc is blown downward. Finally, no matter it is blown upward or downward, the arc is discharged from the exhaust port b01 at the rear end of the arc extinguishing chamber b.

[0034] Example 2

[0035] As attached Figure 6 As shown, in this embodiment, the permanent magnet 4 is embedded in a cavity c formed by two arc contacts 101 arranged side by side. Other structures and working principles are the same as those of the first embodiment.

[0036] Example 3

[0037] As attached Figure 7As shown in the embodiment, the arc contact 101 has an arc contact point 101a in contact with the static contact 2, and the permanent magnet 4 is arranged at one end of the arc contact 101 close to the arc contact point 101a, specifically, the permanent magnet 4 is arranged at the side of the arc contact 101 away from the arc contact point 101a and on the track of the arc contact 101 moving in the opening direction.

[0038] In addition, the permanent magnet 4 can also be arranged on the same side of the arc contact 101 as the arc contact point 101a.

[0039] The other structures and working principles of the embodiment are the same as those of the embodiment 1, and the arc can also be lengthened by the strong magnetic field force of the permanent magnet, so that the high-voltage arc can be smoothly extinguished.

[0040] Embodiment 4

[0041] In the embodiment, the permanent magnet 4 is arranged at a position beside the track of the arc contact 101, specifically, the permanent magnet 4 is fixed at a position beside the arc contact 101 in the arrangement direction of the arc contact 101 and the main contact 102 and is located at the side of the arc contact 101 close to the main contact 102.

[0042] Embodiment 5

[0043] In the embodiment, the magnetic pole directions of the permanent magnet 4 are respectively directed to the two ends in the arrangement direction of the arc contact 101 and the main contact 102, so that the switch has polarity.

[0044] The utility model provides a kind of arc extinguishing system of reinforcing magnetic blow effect, it includes contact system a and arc extinguishing chamber b, the contact system a includes movable contact 1 and static contact 2, the arc generated by movable contact 1 and static contact 2 are extinguished after passing through arc extinguishing grid piece 3 in arc extinguishing chamber b and are discharged, the movable contact 1 includes arc contact 101 and main contact 102, it is characterized by: the corresponding position of arc contact 101 is arranged with permanent magnet 4, the magnetic field of permanent magnet 4 can lengthen the arc generated by movable contact 1 and static contact 2 simultaneously and blow arc to the side position of arc extinguishing chamber b, so that arc is cut off and extinguished by as many arc extinguishing grid pieces 3 as possible.The arc extinguishing system of the utility model arranges permanent magnet in the corresponding area of arc contact, utilizes the strong magnetic field force of permanent magnet to lengthen arc, so that high-voltage arc can be smoothly extinguished.

[0045] The technical features of the above embodiments can be combined arbitrarily, and to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0046] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a more specific and detailed manner, but should not be construed as limiting the scope of the patent of the present application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An arc extinguishing system with enhanced magnetic blow effect, comprising a contact system (a) and an arc chamber (b), said contact system (a) comprising a moving contact (1) and a stationary contact (2), said moving contact (1) and stationary contact (2) breaking the generated arc and discharging after the arc is extinguished by arc plates (3) in the arc chamber (b), said moving contact (1) comprising an arc contact (101) and a main contact (102), characterized in that: A permanent magnet (4) is arranged at a position beside the arc contact (101), and a magnetic field of the permanent magnet (4) can elongate the arc generated by breaking the moving contact (1) and the stationary contact (2) and blow the arc to a side position of the arc extinguishing chamber (b) so that the arc is extinguished.

2. An arc quenching system with enhanced magnetic blow effect as claimed in claim 1 wherein: The permanent magnet (4) is arranged at a position beside the arc contact (101).

3. An arc quenching system to enhance magnetic blow effect as claimed in claim 2 wherein: The permanent magnet (4) is arranged in a space between at least two arc contacts (101) arranged side by side.

4. An arc quenching system to enhance magnetic blow effect as claimed in claim 3 wherein: The permanent magnet (4) is inlaid in a cavity (c) formed by two arc contacts (101) arranged side by side.

5. An arc quenching system to enhance magnetic blow effect as claimed in claim 1 wherein: The permanent magnet (4) is arranged at an end of the arc contact (101) close to the arc contact point (101a).

6. An arc quenching system to enhance magnetic blow effect as claimed in claim 1 wherein: The magnetic pole direction of the permanent magnet (4) points to one end inside the arc extinguishing chamber (b) and the other end away from the arc extinguishing chamber (b).

7. An arc quenching system to enhance magnetic blow effect as claimed in claim 2 wherein: The permanent magnet (4) is fixed at a position beside the arc contact (101) in the arrangement direction of the arc contact (101) and the main contact (102), and is located at a side of the arc contact (101) close to the main contact (102).

8. An arc quenching system to enhance magnetic blow effect as claimed in claim 1 wherein: The magnetic pole direction of the permanent magnet (4) points to both ends in the arrangement direction of the arc contact (101) and the main contact (102).

9. An arc quenching system to enhance magnetic blow effect as claimed in claim 5 wherein: The permanent magnet (4) is arranged at a side of the arc contact (101) away from the arc contact point (101a).

10. An arc quenching system to enhance magnetic blow effect as claimed in claim 5 wherein: The permanent magnet (4) is arranged at a side of the arc contact (101) on the same side as the arc contact point (101a).

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