Arc extinguish chamber for low-voltage apparatus

Abstract

The utility model relates to the technical field of arc extinguish chambers, and discloses an arc extinguish chamber for a low-voltage electric appliance, which comprises a protective shell, an insulating arc extinguish grid sheet is fixedly connected in the middle of the protective shell, a first groove is formed in the insulating arc extinguish grid sheet, a magnetizer is arranged in the insulating arc extinguish grid sheet, and a second groove is formed in the middle of the protective shell. A first groove is formed in the left side of the protection shell, a second groove is formed in the insulation arc extinguishing grid piece, a permanent magnet is arranged in the insulation arc extinguishing grid piece, a static contact is arranged in the left side of the protection shell, a third groove is formed in the left side of the protection shell, and the outer wall of the static contact is arranged in the third groove; and a moving contact is arranged on the inner wall of the protective shell. According to the utility model, the static contact and the moving contact are connected with an external circuit, and an arc is generated in the arc extinguishing chamber after the external circuit is disconnected, so that the effects of efficiently extinguishing the arc and avoiding vibration and noise of the permanent magnet when the contacts are in a normal closed working state are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to arc-extinguishing chamber technical field especially for low voltage electrical apparatus's arc-extinguishing chamber. BACKGROUND

[0002] Arc-extinguishing chamber is a device for extinguishing arc, mainly applied in various low voltage electrical apparatuses needing to control circuit on-off, arc is a kind of high-temperature, high-energy gas discharge phenomenon generated when electrical contact breaks current, can cause ablation to contact, influence the service life of electrical apparatus, the existence of chamber is to reduce the burning time of arc.

[0003] When arc is generated after contact separation, the magnetic field generated by permanent magnet in arc-extinguishing chamber can quickly lengthen arc and arc can be divided into many small segments by arc-extinguishing grid piece, but permanent magnet will be influenced by alternating magnetic field in alternating current environment, and permanent magnet will vibrate and collide with adjacent contact surface with the increase of current, and then noise will be generated. SUMMARY

[0004] In order to make up for the above shortcomings, the utility model provides an arc-extinguishing chamber for low voltage electrical apparatus, aiming at improving the problem that permanent magnet vibrates and noise is generated due to displacement of permanent magnet in alternating current environment.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] An arc-extinguishing chamber for low voltage electrical apparatus, including protection shell, the middle part inside fixedly connected with insulating arc-extinguishing grid piece of protection shell, the inside of insulating arc-extinguishing grid piece is equipped with first recess, the inside of insulating arc-extinguishing grid piece is equipped with magnetic conductor, the inside of insulating arc-extinguishing grid piece is equipped with second recess, the inside of insulating arc-extinguishing grid piece is equipped with permanent magnet, the left side inside of protection shell is equipped with static contact, the left side inside of protection shell is equipped with third recess, the outer wall of static contact is arranged in the inside of third recess, the inner wall of protection shell is equipped with moving contact, the inner wall of protection shell is equipped with breaking unit shell, the outer wall of breaking unit shell is arranged on the outer wall of insulating arc-extinguishing grid piece, the right side inside of protection shell is fixedly connected with reinforcing rib, the middle part inside of protection shell is equipped with limiting assembly, and the limiting assembly is used to limit the position of moving contact.

[0007] Preferably, the limiting assembly includes a moving contact housing, the outer wall of the moving contact housing is arranged in the middle part inside of the protection shell, and the inside of the moving contact housing is threadedly connected with a fixing screw.

[0008] Preferably, the outer wall of the magnetic conductor is arranged in the inside of the first recess, and the outer wall of the permanent magnet is arranged in the inside of the second recess.

[0009] Preferably, the outer wall of the fixing screw is threadedly connected in the middle part of the protection shell, and the outer wall of the moving contact shell is arranged on the outer wall of the insulating arc-extinguishing fin.

[0010] The utility model has the advantages of the following:

[0011] 1、 the utility model discloses, through static contact, moving contact links arc extinguishing chamber with outside high -voltage circuit, and the arc is generated in arc extinguishing chamber after outside circuit breaker, and a large number of insulating arc-extinguishing fin are installed in the protection shell, and then insulating arc-extinguishing fin divides arc into multiple small arcs and makes arc accelerate dissipation, thereby reach the effect of high -efficient arc extinguishing while avoiding permanent magnet vibration and noise when contact closure working state. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 A three-dimensional structure schematic view of the arc extinguishing chamber for low-voltage electrical apparatus is provided for the utility model;

[0013] Figure 2 A permanent magnet partial structure schematic view of the arc extinguishing chamber for low-voltage electrical apparatus is provided for the utility model;

[0014] Figure 3 A magnetic conductor partial structure schematic view of the arc extinguishing chamber for low-voltage electrical apparatus is provided for the utility model.

[0015] LEGEND:

[0016] 1, protection shell, 2, insulating arc-extinguishing fin, 3, magnetic conductor, 4, permanent magnet, 5, static contact, 6, moving contact, 7, breaking unit shell, 8, reinforcing rib, 9, fixing screw, 10, first recess, 11, second recess, 12, moving contact shell, 13, third recess. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the specification of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0018] REFERENCE Figures 1-3The utility model provides an embodiment: a kind of arc-extinguishing chamber for low-voltage electric appliance, including protective shell 1, the middle portion inside of protective shell 1 is fixedly connected with insulating arc-extinguishing grid piece 2, the inside of insulating arc-extinguishing grid piece 2 is equipped with first recess 10, the inside of insulating arc-extinguishing grid piece 2 is provided with magnet conductor 3, the inside of insulating arc-extinguishing grid piece 2 is equipped with second recess 11, the inside of insulating arc-extinguishing grid piece 2 is provided with permanent magnet 4, the left side inside of protective shell 1 is provided with static contact 5, the left side inside of protective shell 1 is equipped with third recess 13, the outer wall of static contact 5 is arranged in the inside of third recess 13, the inner wall of protective shell 1 is provided with moving contact 6, the inner wall of protective shell 1 is provided with breaking unit shell 7, the outer wall of breaking unit shell 7 is arranged in the outer wall of insulating arc-extinguishing grid piece 2, the right side inside of protective shell 1 is fixedly connected with reinforcing rib 8, the middle portion inside of protective shell 1 is provided with limiting assembly, and limiting assembly is used to limit the position of moving contact 6;

[0019] Specifically, the static contact 5, the moving contact 6 and the high-voltage circuit are connected, the arc is generated in the arc-extinguishing chamber after the circuit is cut off, and the insulating arc-extinguishing grid piece 2 is fixed in the protective shell 1, at this time, the insulating arc-extinguishing grid piece 2 cuts the arc to accelerate the dissipation of the arc, then the magnetic field generated by the permanent magnet 4 attracts the arc into the insulating arc-extinguishing grid piece 2 and lengthens the arc to facilitate cutting, and the reinforcing rib 8 in the protective shell 1 enhances the impact resistance of the arc-extinguishing chamber.

[0020] Referring to Figure 1 The limiting assembly includes a moving contact housing 12, the outer wall of the moving contact housing 12 is arranged in the middle portion of the protective shell 1, and the inside of the moving contact housing 12 is threadedly connected with a fixing screw 9.

[0021] Specifically, the protective shell 1 is arranged on the surface of the protective shell 1, and the fixing screw 9 further fixes the moving contact housing 12 in the protective shell 1.

[0022] Referring to Figure 2 And Figure 3 The outer wall of the magnet conductor 3 is arranged in the first recess 10, and the outer wall of the permanent magnet 4 is arranged in the second recess 11; the outer wall of the fixing screw 9 is threadedly connected in the middle portion of the protective shell 1, and the outer wall of the moving contact housing 12 is arranged on the outer wall of the insulating arc-extinguishing grid piece 2.

[0023] Specifically, the first recess 10 is provided with the magnet conductor 3 to strengthen the magnetic field of the magnet conductor 3, the breaking unit shell 7 is connected with the insulating arc-extinguishing grid piece 2 under the action of the magnetic field of the permanent magnet 4, and the permanent magnet 4 is fixed in the second recess 11 under the mutual attraction of the magnetic force, so that the arc is extinguished efficiently, and the vibration and noise of the permanent magnet 4 are avoided.

[0024] Working principle: when the arc extinguishing chamber needs to be used, first, the static contact 5 and the moving contact 6 are connected with the circuit, and when the external circuit is cut off, the arc is generated between the static contact 5 and the moving contact 6, and a large number of insulating arc-extinguishing grid pieces 2 are installed between the static contact 5 and the moving contact 6, then the insulating arc-extinguishing grid pieces 2 cut the arc into multiple small arcs to accelerate the dissipation of the arc, at this time, the magnetic field generated by the permanent magnet 4 further lengthens the arc and guides the arc to the inside of the insulating arc-extinguishing grid pieces 2 to avoid the overflow of the arc, and a large number of reinforcing ribs 8 are arranged in the inside of the protective shell 1 to enhance the internal structure strength of the arc extinguishing chamber to reduce the damage caused by the collision of the arc extinguishing chamber, then the moving contact shell 12 is fixed in the inside of the protective shell 1 by the fixing screw 9 to fix the position of the moving contact 6, at the same time, the magnet conductor 3 is arranged in the first recess 10 to enhance the magnetic field generated by the permanent magnet 4, and the breaking unit shell 7 is tightly adsorbed on the outer wall of the insulating arc-extinguishing grid pieces 2 under the action of the permanent magnet 4, and under the mutual attraction of the magnetic force, the permanent magnet 4 is attached to the inside of the second recess 11 and is stationary, thereby achieving high-efficiency arc extinguishing while avoiding the vibration and noise of the permanent magnet 4 in the closed working state of the contact.

[0025] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An arc quenching chamber for low voltage electrical apparatus comprising a protective shell (1), characterized in that: The middle part of the protection shell (1) is fixedly connected with an insulating arc-extinguishing fin (2), the inside of the insulating arc-extinguishing fin (2) is provided with a first groove (10), the inside of the insulating arc-extinguishing fin (2) is provided with a magnetic conductor (3), the inside of the insulating arc-extinguishing fin (2) is provided with a second groove (11), the inside of the insulating arc-extinguishing fin (2) is provided with a permanent magnet (4), the left side of the protection shell (1) is provided with a static contact (5), the left side of the protection shell (1) is provided with a third groove (13), the outer wall of the static contact (5) is arranged in the third groove (13), the inner wall of the protection shell (1) is provided with a moving contact (6), the inner wall of the protection shell (1) is provided with a breaking unit shell (7), the outer wall of the breaking unit shell (7) is arranged on the outer wall of the insulating arc-extinguishing fin (2), the right side of the protection shell (1) is fixedly connected with a reinforcing rib (8), the middle part of the protection shell (1) is provided with a limiting assembly, and the limiting assembly is used for limiting the position of the moving contact (6).

2. An arc quenching chamber for low voltage electrical apparatus according to claim 1, characterized in that: The limiting assembly comprises a moving contact shell (12), and the outer wall of the moving contact shell (12) is arranged in the middle part of the protection shell (1).

3. An arc quenching chamber for low voltage electrical apparatus according to claim 1, characterized in that: The outer wall of the magnetic conductor (3) is arranged in the first groove (10), and the outer wall of the permanent magnet (4) is arranged in the second groove (11).

4. An arc quenching chamber for low voltage electrical apparatus according to claim 2, characterized in that: The outer wall of the fixing screw (9) is threadedly connected in the middle part of the protection shell (1), and the outer wall of the moving contact shell (12) is arranged on the outer wall of the insulating arc-extinguishing fin (2).

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