Arc extinguish chamber

Abstract

An arc extinguish chamber comprises a first transverse arc extinguish grid piece set, a second transverse arc extinguish grid piece set and a longitudinal arc extinguish grid piece set, the first transverse arc extinguish grid piece set and the second transverse arc extinguish grid piece set are located on the two sides of the longitudinal arc extinguish grid piece set, and one end of a movable end tab is arranged at the end, away from the longitudinal arc extinguish grid piece set, of the first transverse arc extinguish grid piece set. One end of the static arc striking plate is arranged at one end, far away from the longitudinal arc extinguishing grid plate group, of the transverse arc extinguishing grid plate group II, the other end of the movable arc striking plate and the other end of the static arc striking plate extend towards a separation area of the movable contact and the static contact, and one end of the longitudinal arc extinguishing grid plate group is located between the transverse arc extinguishing grid plate group I and the transverse arc extinguishing grid plate group II. And the other end of the moving contact extends to a separation area of the moving contact and the static contact. By changing the arrangement mode of the arc extinguishing grid plates in the arc extinguishing chamber, particularly arranging the arc extinguishing grid plates into a transverse arc extinguishing grid plate group and a longitudinal arc extinguishing grid plate group which are intersected, the arc column voltage and the grid plate near-pole voltage drop are increased at the same time, so that the arc voltage is improved, and the arc extinguishing capability of the arc extinguishing chamber is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to low pressure switch technical field, specifically is related to an arc-extinguishing chamber. BACKGROUND

[0002] In the field of existing low-voltage switches, AC switches can reach AC1140V. According to the latest development needs of low-voltage electrical industry standards, the current and voltage that AC switches can withstand will reach AC2000V and DC3000V. The existing traditional products have been unable to meet the use requirements. Especially in the wind power industry, after the system voltage is raised from AC1140V to AC2000V, higher arc voltage is needed to extinguish the arc, but in the traditional arc-extinguishing chamber, the arc-extinguishing grids are arranged in parallel, and there is no space to arrange more arc-extinguishing grids. Figure 1 As shown in the figure, in the prior art, after the arc generated by the separation of the moving contact and the stationary contact is blown into the arc-extinguishing chamber, the arc-extinguishing chamber cuts the arc and provides a near-pole voltage drop. However, the arrangement of the arc-extinguishing grids in the existing arc-extinguishing chamber cannot achieve sufficient arc voltage, which leads to an increase in the difficulty of extinguishing the arc after the system voltage is raised from AC1140V to AC2000V. SUMMARY

[0003] The utility model discloses to the above-mentioned arrangement of the arc-extinguishing grids in the existing arc-extinguishing chamber, which is difficult to achieve sufficient arc voltage, thereby leading to an increase in the difficulty of extinguishing the arc after the system voltage is raised from AC1140V to AC2000V, and provides an arc-extinguishing chamber. By changing the arrangement of the arc-extinguishing grids in the arc-extinguishing chamber, the arc voltage is greatly improved, thereby enhancing the arc-extinguishing capacity of the arc-extinguishing chamber.

[0004] TECHNICAL SCHEME

[0005] In order to achieve the above technical purpose, the utility model provides an arc-extinguishing chamber, which is characterized by comprising a horizontal arc-extinguishing grid group one, a horizontal arc-extinguishing grid group two and a vertical arc-extinguishing grid group, the horizontal arc-extinguishing grid group one and the horizontal arc-extinguishing grid group two are located on both sides of the vertical arc-extinguishing grid group, one end of the moving arc plate is arranged at the end of the horizontal arc-extinguishing grid group one away from the vertical arc-extinguishing grid group, one end of the stationary arc plate is arranged at the end of the horizontal arc-extinguishing grid group two away from the vertical arc-extinguishing grid group, the other end of the moving arc plate and the other end of the stationary arc plate extend to the separation area of the moving contact and the stationary contact, one end of the vertical arc-extinguishing grid group is located between the horizontal arc-extinguishing grid group one and the horizontal arc-extinguishing grid group two, and the other end extends to the separation area of the moving contact and the stationary contact.

[0006] In one embodiment, the outer side of the other end of the moving arc plate and the outer side of the other end of the stationary arc plate are respectively provided with permanent magnet one and permanent magnet two.

[0007] In one of the embodiments, the other end of the moving arc plate and the other end of the static arc plate extend to and gradually surround the moving contact and static contact separation area.

[0008] In one of the embodiments, the longitudinal arc-extinguishing fin group has a V-shaped arc-extinguishing fin one, and the openings of the stacked arc-extinguishing fins one are directed towards the moving contact and static contact separation area.

[0009] In one of the embodiments, the arc-extinguishing fin two in the transverse arc-extinguishing fin group one and the transverse arc-extinguishing fin group two is arranged on both sides of the longitudinal arc-extinguishing fin group away from the moving contact and static contact separation area.

[0010] In one of the embodiments, the arc-extinguishing fin two in the transverse arc-extinguishing fin group one and the transverse arc-extinguishing fin group two gradually inclines from the side away from the longitudinal arc-extinguishing fin group one to the side close to the longitudinal arc-extinguishing fin group one.

[0011] In one of the embodiments, the arc-extinguishing fin two in the transverse arc-extinguishing fin group one and the transverse arc-extinguishing fin group two away from the longitudinal arc-extinguishing fin group one is arranged vertically, and the arc-extinguishing fin two close to the transition of the longitudinal arc-extinguishing fin group is close to the angle of the adjacent arc-extinguishing fin one.

[0012] In one of the embodiments, the inner side of the moving arc plate and the transverse arc-extinguishing fin group one and the longitudinal arc-extinguishing fin group form a space one, the inner side of the static arc plate and the transverse arc-extinguishing fin group two and the longitudinal arc-extinguishing fin group form a space two, the inner side of the moving arc plate and the inner side of the static arc plate form a space three below the end of the longitudinal arc-extinguishing fin group close to the moving contact and static contact separation area, and the arc generated by the separation of the moving contact and the static contact travels along the space one, the space three, and the space two to form an M shape.

[0013] In one of the embodiments, the static contact and the static arc plate are integrated.

[0014] In one of the embodiments, the moving contact and static contact separation area is located at the entrance of the end surrounded by the moving arc plate and the static arc plate.

[0015] Advantages

[0016] The utility model provides a kind of arc extinguishing chamber, it includes horizontal arc extinguishing grid piece group one, horizontal arc extinguishing grid piece group two and longitudinal arc extinguishing grid piece group, horizontal arc extinguishing grid piece group one, horizontal arc extinguishing grid piece group two are located longitudinal arc extinguishing grid piece group both sides, one end of dynamic arc plate is arranged in the one end of horizontal arc extinguishing grid piece group one far from longitudinal arc extinguishing grid piece group, one end of static arc plate is arranged in the one end of horizontal arc extinguishing grid piece group two far from longitudinal arc extinguishing grid piece group, the other end of dynamic arc plate and the other end of static arc plate extend to dynamic contact and static contact separation area, the outside of the other end of dynamic arc plate and the outside of the other end of static arc plate correspond and be equipped with permanent magnet one and permanent magnet two, longitudinal arc extinguishing grid piece group one end is located between horizontal arc extinguishing grid piece group one and horizontal arc extinguishing grid piece group two, and other end extends to dynamic contact and static contact separation area. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be needed to use the drawings in the embodiments briefly introduced, should understand, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art comes, under the premise of not paying creative labor, can also obtain other related drawings according to these drawings.

[0018] Figure Figure 1 It is arc extinguishing chamber structure schematic diagram in prior art;

[0019] Figure Figure 2 It is electric arc movement path schematic diagram in prior art;

[0020] Figure Figure 3 It is arc extinguishing chamber structure schematic diagram in the embodiments of the utility model;

[0021] Figure Figure 4 It is electric arc movement path schematic diagram in the embodiments of the utility model;

[0022] Figure Figure 5 It is arc extinguishing chamber and contact system structure schematic diagram in the embodiments of the utility model; DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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 include at least one of the features explicitly or implicitly. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of the first feature to the 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 "on", "above" and "over" 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 higher than the second feature in horizontal height. The "under", "below" 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 lower than the second feature in horizontal height.

[0027] 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.

[0028] Embodiments

[0029] As Figure 1As shown, in the prior art, after the arc generated by the breaking of the moving and stationary contacts is blown into the arc-extinguishing chamber within the casing, the arc-extinguishing chamber cuts the arc and provides a near-electrode voltage drop. However, the arrangement of the arc-extinguishing grid plates in the existing arc-extinguishing chamber makes it difficult to achieve sufficient arc voltage, which leads to increased difficulty in extinguishing the arc after the system voltage is increased from AC1140V to AC2000V.

[0030] In a frame circuit breaker, an electric arc is generated on the contacts after the moving and stationary contacts open. This arc is introduced into the arc-extinguishing chamber by the arc-starting plates, and the arc-extinguishing chamber uses the near-pole voltage drop of the multi-grid plates to cut and extinguish the arc.

[0031] In existing technology, the traditional empirical formula for extinguishing AC arc voltage is:

[0032]

[0033] U A =U0+(n+1)ΔU

[0034] In the formula, I—current, L—inductance, U c —Power supply voltage, R—Circuit resistance, U A — Arc voltage, U0 — Arc column voltage, n — Number of grid plates, ΔU — Near-field voltage drop of the grid plate.

[0035] Therefore, if you want to turn off the higher power supply voltage U c A higher arc voltage U is required. A And a higher arc voltage U A Therefore, the arc column voltage U0 and / or the near-field voltage drop ΔU must be increased.

[0036] like Figure 1 In the traditional structure shown, such as Figure 2 As shown, when an arc g is generated between the moving contact e and the stationary contact f, the arc g enters the arc-extinguishing chamber grid plate h under the magnetic blow-off force attraction of the grid plate h. However, this traditional structure cannot be further expanded to include more arc-extinguishing grid plates, thus making it impossible to increase the voltage to the required 2000V.

[0037] To solve the above problems, see attached Figure 5As shown, the embodiment provides an arc-extinguishing chamber, which comprises a transverse arc-extinguishing fin group one 1, a transverse arc-extinguishing fin group two 10 and a longitudinal arc-extinguishing fin group 2, the transverse arc-extinguishing fin group one 1 and the transverse arc-extinguishing fin group two 10 are located on both sides of the longitudinal arc-extinguishing fin group 2, in the embodiment, the transverse arc-extinguishing fin group one 1, the transverse arc-extinguishing fin group two 10 and the longitudinal arc-extinguishing fin group 2 form a T shape. One end of the longitudinal arc-extinguishing fin group 2 is located between the transverse arc-extinguishing fin group one 1 and the transverse arc-extinguishing fin group two 10, and the other end extends to the separation area of the moving contact 5 and the static contact 6. The arc-extinguishing fins two 101 in the transverse arc-extinguishing fin group one 1 and the transverse arc-extinguishing fin group two 10 are arranged on both sides of the end of the longitudinal arc-extinguishing fin group 2 away from the separation area of the moving contact 5 and the static contact 6. The arc-extinguishing fins two 101 in the transverse arc-extinguishing fin group one 1 and the transverse arc-extinguishing fin group two 10 gradually incline from the side away from the longitudinal arc-extinguishing fin group 2 to the side close to the longitudinal arc-extinguishing fin group 2. Among them, the arc-extinguishing fins two 101 on the side of the transverse arc-extinguishing fin group one 1 and the transverse arc-extinguishing fin group two 10 away from the longitudinal arc-extinguishing fin group 2 are arranged vertically, and the arc-extinguishing fins two 101 close to the transition 101a of the longitudinal arc-extinguishing fin group 2 are close to the angle of the adjacent arc-extinguishing fins one 201.

[0038] The number of arc-extinguishing fins in the T-shaped arc-extinguishing fin group is much larger than that in the parallel arrangement in the traditional structure. As shown in the attached Figure 3 In the T-shaped arc-extinguishing fin group, the arc can be cut into a number much larger than that in the traditional parallel arc-extinguishing fin group under the same volume. More arc-extinguishing fins are realized, more near-pole voltage drops are provided, the arc voltage is improved, and the product performance requirements of increasing to AC 2000V are met.

[0039] As shown in the attached Figure 5 One end of the moving arc plate 3 is arranged at the end of the transverse arc-extinguishing fin group one 1 away from the longitudinal arc-extinguishing fin group 2, one end of the static arc plate 4 is arranged at the end of the transverse arc-extinguishing fin group two 10 away from the longitudinal arc-extinguishing fin group 2, the other end of the moving arc plate 3 and the other end of the static arc plate 4 extend to the separation area of the moving contact 5 and the static contact 6, specifically, the other end of the moving arc plate 3 and the other end of the static arc plate 4 extend to the separation area of the moving contact 5 and the static contact 6 and gradually surround. The separation area of the moving contact 5 and the static contact 6 is located at the entrance of the surrounding end of the moving arc plate 3 and the static arc plate 4. The static contact 6 and the static arc plate 4 are integrated.

[0040] As shown in the attached Figure 3 and 5As shown, the outer side of the other end of the moving arc plate 3 and the outer side of the other end of the static arc plate 4 are correspondingly provided with permanent magnet one 7 and permanent magnet two 8, the longitudinal arc-extinguishing fin group 2 is provided with V-shaped arc-extinguishing fin one 201, and the openings of the stacked arc-extinguishing fin one 201 are directed away from the separation area of the moving contact 5 and the static contact 6. The breaking arc can enter from both sides 201a, 201b of the V-shaped arc-extinguishing fin one 201, so that the arc voltage is increased by the fins.

[0041] As shown in the accompanying drawings, the moving arc plate 3 is provided with a plurality of arc-extinguishing fins, and the static arc plate 4 is provided with a plurality of arc-extinguishing fins. Figure 5 As shown, the inner side of the moving arc plate 3 and the space one a between the transverse arc-extinguishing fin group one 1 and the longitudinal arc-extinguishing fin group 2, the inner side of the static arc plate 4 and the space two b between the transverse arc-extinguishing fin group two 10 and the longitudinal arc-extinguishing fin group 2, and the inner side of the moving arc plate 2 and the inner side of the static arc plate 4 below the end of the longitudinal arc-extinguishing fin group 2 close to the separation area of the moving contact 5 and the static contact 6 constitute the space three c, and the breaking arc generated by the separation of the moving contact 5 and the static contact 6 travels along the space one a, the space three c, and the space two b to form an M shape.

[0042] When the breaking arc 9 is generated on the moving contact 5 and the static contact 6, the breaking arc 9 is blown to the moving arc plate 3 by the suction of the permanent magnet one 7 on the moving arc plate 3, and then blown to the static arc plate 4 by the suction of the permanent magnet two 8 on the static arc plate 4, and finally sucked into the arc-extinguishing chamber under the comprehensive action of the T-shaped arc-extinguishing fin group composed of the transverse arc-extinguishing fin group one 1, the transverse arc-extinguishing fin group two 10, and the longitudinal arc-extinguishing fin group 2. The breaking arc 9 finally presents an M shape. Figure 4 As shown in the accompanying drawings, the T-shaped arc-extinguishing fin group can stretch the arc column of the arc into an M shape as shown in the accompanying drawings under the same volume. Figure 4 As shown in the accompanying drawings, the T-shaped arc-extinguishing fin group can stretch the arc column of the arc into an M shape as shown in the accompanying drawings under the same volume.

[0043] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0044] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, some 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 patent protection scope of the present application should be subject to the appended claims.

Claims

1. An arc quenching chamber characterized by: It includes horizontal arc extinguishing fin group one (1), horizontal arc extinguishing fin group two (10) and longitudinal arc extinguishing fin group (2), the horizontal arc extinguishing fin group one (1), horizontal arc extinguishing fin group two (10) are located in longitudinal arc extinguishing fin group (2) both sides, one end of the dynamic arc plate (3) is arranged in the horizontal arc extinguishing fin group one (1) far from the longitudinal arc extinguishing fin group (2) one end, one end of the static arc plate (4) is arranged in the horizontal arc extinguishing fin group two (10) far from the longitudinal arc extinguishing fin group (2) one end, the other end of the dynamic arc plate (3) and the other end of the static arc plate (4) extend to the dynamic contact (5) and the static contact (6) separation area, the longitudinal arc extinguishing fin group (2) one end is located between the horizontal arc extinguishing fin group one (1) and horizontal arc extinguishing fin group two (10), the other end extends to the dynamic contact (5) and the static contact (6) separation area.

2. An arc chamber as claimed in claim 1, characterized in that: The outer side of the other end of the dynamic arc plate (3) and the outer side of the other end of the static arc plate (4) are correspondingly provided with permanent magnet one (7) and permanent magnet two (8).

3. An arc chamber as claimed in claim 1, characterized in that: The other end of the dynamic arc plate (3) and the other end of the static arc plate (4) extend to the dynamic contact (5) and the static contact (6) separation area and gradually surround.

4. An arc chamber as claimed in claim 1, characterized in that: The arc extinguishing fin one (201) in the longitudinal arc extinguishing fin group (2) is V-shaped, and the openings of a plurality of stacked arc extinguishing fin one (201) face the dynamic contact (5) and the static contact (6) separation area.

5. An arc chamber as claimed in claim 1, characterized in that: The arc extinguishing fin two (101) in the horizontal arc extinguishing fin group one (1) and the horizontal arc extinguishing fin group two (10) is arranged on both sides of the longitudinal arc extinguishing fin group (2) far from the dynamic contact (5) and the static contact (6) separation area.

6. An arc chamber as claimed in claim 5, characterized in that: The arc extinguishing fin two (101) in the horizontal arc extinguishing fin group one (1) and the horizontal arc extinguishing fin group two (10) gradually inclines from the side far from the longitudinal arc extinguishing fin group (2) to the side close to the longitudinal arc extinguishing fin group (2).

7. An arc chamber as claimed in claim 5, characterized in that: The arc extinguishing fin two (101) in the horizontal arc extinguishing fin group one (1) and the horizontal arc extinguishing fin group two (10) far from the longitudinal arc extinguishing fin group (2) is vertically arranged, and the arc extinguishing fin two (101) close to the transition (101a) of the longitudinal arc extinguishing fin group (2) is close to the angle of the adjacent arc extinguishing fin one (201).

8. An arc chute as defined in claim 1, wherein: The inner side of the dynamic arc plate (3) and the inner side of the static arc plate (4) form space one (a) between the horizontal arc extinguishing fin group one (1) and the longitudinal arc extinguishing fin group (2), and form space two (b) between the horizontal arc extinguishing fin group two (10) and the longitudinal arc extinguishing fin group (2), and form space three (c) below the end of the longitudinal arc extinguishing fin group (2) close to the dynamic contact (5) and the static contact (6) separation area, the dynamic arc plate (3) and the static arc plate (4), the arc generated by the separation of the dynamic contact (5) and the static contact (6) travels along space one (a), space three (c) and space two (b) to form M-shaped.

9. An arc chute as defined in claim 1, wherein: The static contact (6) and the static arc plate (4) are integrated.

10. An arc chute as claimed in claim 1, characterized in that: The separation area of the dynamic contact (5) and the static contact (6) is located at the entrance of the surrounding end of the dynamic arc plate (3) and the static arc plate (4).

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