Strong magnetic blow-out high-efficiency arc extinguishing device

Abstract

The utility model provides a strong magnetic blow-out high-efficiency arc extinguishing device, which comprises an arc extinguishing assembly, and the arc extinguishing assembly comprises two outer plates, a locking nut, an arc extinguishing chamber, four guide rails, a stud, two adjusting blocks, a magnetic conductive column and a groove. The two outer plates are symmetrically and fixedly connected to the outer side wall of the arc extinguish chamber. The adjusting block is pushed, the adjusting block drives the magnetic conductive column through the groove, the magnetic conductive column drives the magnetic blow-out assembly to generate displacement, then the position of a magnetic field can be adjusted at the moment so as to meet different working conditions, when the position of the adjusting block is moved, the adjusting block drives the stud, after adjustment is completed, the locking nut is rotated, the stud can be locked, and the magnetic blow-out assembly is convenient to use. When the breaking current is small, the electric arc can be extinguished through the cooperation of the outer arc sheet and the outer arc chute, and when the breaking current is large, the electric arc connects the magnetic blow-out coil to generate a large magnetic field facing the inside of the arc extinguish chamber, and the electric arc moves to the arc extinguish chamber and is extinguished after being in contact with the inner arc chute.

Description

TECHNICAL FIELD

[0001] The utility model relates to an arc extinguishing device, in particular to a strong magnetic blow high -efficient arc extinguishing device belongs to arc extinguishing device technical field. BACKGROUND

[0002] Contactor is a kind of device commonly used in electrical control equipment, mainly used for remote control and on-off operation of power system. Since modern ships and locomotive power systems are mostly direct current circuits, the use of DC contactor is becoming more and more widespread, and the development of power system also puts forward higher requirements for the breaking capacity of contactor. The breaking capacity of contactor mainly depends on arc extinguishing device, and the existing DC contactor generally uses fan-shaped arc extinguishing chamber or obtuse angle arc breaking gap, but the utilization rate of arc extinguishing grid of this design is low, and a large space is needed for arranging arc extinguishing chamber, which does not meet the development trend of "miniaturization" of electrical equipment. In addition, the magnetic field generated by coil or permanent magnet is needed to promote arc breaking, but coil is difficult to apply to small current conditions, and permanent magnet is only suitable for one-way current conditions, both of which have limitations.

[0003] It is known that Chinese invention patent (publication number: CN119049899A) discloses a double magnetic blow quick arc extinguishing device, which uses a square arc extinguishing chamber and is equipped with an arc leading angle arranged at 180°, reducing the occupied space and making it easier for arc to enter the arc extinguishing grid. The arc can be lengthened and extinguished without using arc leading angle. When breaking large current, the arc itself can be transferred to the arc leading angle, and the vertical magnetic field generated by the permanent magnet can push the upper arc to the grid and extend to the arc extinguishing grid, effectively accelerating the extinction of arc.

[0004] The position of magnetic blow coil in the magnetic blow arc extinguishing device is fixed, which can ensure that the device can stably and efficiently operate under standard conditions. However, since the position of magnetic blow coil is fixed, it cannot be flexibly adjusted according to the actual current size, which leads to suboptimal magnetic field distribution and affects the arc extinguishing effect. For example, when facing extreme conditions such as large current, the strength of arc will significantly increase, and the requirements for arc extinguishing device also increase. In order to more effectively blow out the arc, a stronger magnetic field is usually needed to provide sufficient arc blowing force. Therefore, a strong magnetic blow high-efficiency arc extinguishing device is proposed. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a strong magnetic blow high-efficiency arc extinguishing device to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial choice.

[0006] The technical scheme of the utility model embodiment is implemented as follows: a strong magnetic blow high-efficiency arc extinguishing device, comprising an arc extinguishing assembly, the arc extinguishing assembly comprising two outer plates, a locking nut, an arc extinguishing chamber, four guide rails, a stud, two adjusting blocks, a magnetic conducting column and a groove.

[0007] Two outer plates are symmetrically and fixedly connected to the outer side wall of the arc-extinguishing chamber, four guide rails are symmetrically and fixedly connected to the opposite surfaces of the two outer plates, the adjusting blocks are slidably connected to the inner side wall of the guide rail, two grooves are symmetrically formed in the opposite surfaces of the two adjusting blocks corresponding to each other, the magnetic conducting column is located in the two grooves, the threaded stud is fixedly connected to the top end of the magnetic conducting column, the magnetic blow assembly is installed on the outer portion of the magnetic conducting column, and the locking nut is threadedly connected to the outer side wall of the threaded stud.

[0008] Further preferably, the threaded stud is slidably connected to the inner portion of the through groove, and the lower surface of the locking nut is attached to the upper surface of the outer plate.

[0009] Further preferably, the inner arc-extinguishing grid is installed in the arc-extinguishing chamber, and the arc-extinguishing net is installed on the rear surface of the arc-extinguishing chamber.

[0010] Further preferably, the outer arc-extinguishing grid is jointly installed on the opposite surfaces of the two outer plates.

[0011] Further preferably, two permanent magnets are symmetrically embedded in the inner portion of one outer plate.

[0012] Further preferably, the magnetic blow assembly comprises an inner arc-leading piece, a magnetic blow coil and an outer arc-leading piece.

[0013] The inner arc-leading piece is fixedly connected to one end of the magnetic blow coil, and the outer arc-leading piece is fixedly connected to the other end of the magnetic blow coil.

[0014] Further preferably, the magnetic blow coil is wound on the outer side wall of the magnetic conducting column.

[0015] Further preferably, one end of the inner arc-leading piece, which is away from the magnetic blow coil, is fixedly connected to the inner wall of the arc-extinguishing chamber, and the outer arc-leading piece is located outside the arc-extinguishing chamber.

[0016] The embodiment of the utility model has the following advantages due to the adoption of the above technical scheme.

[0017] The utility model discloses a kind of arc-extinguishing chambers, including arc-extinguishing chamber, two outer plates, four guide rails, adjusting block, two grooves, magnetic conducting column, threaded stud, magnetic blow assembly and locking nut, the position of magnetic field can be adjusted by pushing adjusting block, adjusting block drives threaded stud when the position of adjusting block is moved, after adjusting, locking nut is rotated, threaded stud can be locked, the position of magnetic blow assembly is fixed, when breaking current is small, arc is extinguished by the cooperation of outer arc-leading piece and outer arc-extinguishing grid, when breaking current is large, arc will move to arc-extinguishing chamber and be extinguished after contacting with inner arc-extinguishing grid.

[0018] The above summary is intended to illustrate the application and is not intended to be limiting thereof. Further aspects, embodiments and features of the application will be apparent from the detailed description that follows, taken in conjunction with the accompanying drawings and the description of the state of the art. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0020] Figure 1 is a structural diagram of the present application;

[0021] Figure 2 is a structural diagram of the arc extinguishing assembly of the present application;

[0022] Figure 3 is a structural diagram of the guide rail of the present application;

[0023] Figure 4 is a structural diagram of the magnetic blow assembly of the present application.

[0024] Reference signs: 101, arc extinguishing assembly; 11, outer plate; 12, locking nut; 13, through slot; 14, arc extinguishing net; 15, inner arc extinguishing grid; 16, arc extinguishing chamber; 17, guide rail; 18, stud; 19, adjusting block; 20, magnetic conducting column; 21, groove; 22, outer arc extinguishing grid; 23, permanent magnet; 301, magnetic blow assembly; 31, inner arc striking piece; 33, magnetic blow coil; 34, outer arc striking piece. DETAILED DESCRIPTION

[0025] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0026] The embodiments of the present application will be described in detail below with reference to the drawings.

[0027] As Figures 1-4 shown, the present application provides a strong magnetic blow high-efficiency arc extinguishing device, which comprises an arc extinguishing assembly 101.

[0028] The arc extinguishing assembly 101 comprises two outer plates 11, a locking nut 12, an arc extinguishing chamber 16, four guide rails 17, a stud 18, two adjusting blocks 19, a magnetic conducting column 20 and a groove 21.

[0029] Two outer plates 11 are symmetrically fixedly connected to the outer side wall of the arc extinguishing chamber 16, four guide rails 17 are symmetrically fixedly connected to the opposite surfaces of the two outer plates 11, and the adjusting blocks 19 are slidingly connected to the inner side wall of the guide rails 17, so that the adjusting blocks 19 can slide along the guide rails 17;

[0030] The opposite surfaces of the corresponding two adjusting blocks 19 are symmetrically provided with two grooves 21, the magnetic conducting column 20 is located inside the two grooves 21, the threaded stud 18 is fixedly connected to the top end of the magnetic conducting column 20, the magnetic blowing assembly 301 is installed on the outside of the magnetic conducting column 20, and the inside of one outer plate 11 is symmetrically embedded with two permanent magnets 23. By pushing the adjusting block 19, the adjusting block 19 drives the magnetic conducting column 20 through the groove 21, the magnetic conducting column 20 drives the magnetic blowing assembly 301 to displace, and then the position of the magnetic field can be adjusted at this time to meet different working conditions.

[0031] The locking nut 12 is threadedly connected to the outer side wall of the threaded stud 18, the upper surfaces of the upper outer plate 11 and the guide rail 17 are both provided with a through groove 13, the threaded stud 18 is slidingly connected to the inside of the through groove 13, and the lower surface of the locking nut 12 is attached to the upper surface of the outer plate 11. When the position of the adjusting block 19 is moved, the adjusting block 19 drives the threaded stud 18, and the threaded stud 18 can be provided with a relief space through the through groove 13. After the adjustment is completed, the threaded stud 18 can be locked by rotating the locking nut 12, so that the position of the magnetic blowing assembly 301 is fixed.

[0032] In an embodiment, the inside of the arc extinguishing chamber 16 is provided with an inner arc extinguishing grid 15, and the rear surface of the arc extinguishing chamber 16 is provided with an arc extinguishing net 14. The arc entering the arc extinguishing chamber 16 can be extinguished by the inner arc extinguishing grid 15.

[0033] In an embodiment, the opposite surfaces of the two outer plates 11 are jointly provided with an outer arc extinguishing grid 22, and the arc outside the arc extinguishing chamber 16 can be extinguished by the outer arc extinguishing grid 22.

[0034] In an embodiment, the magnetic blowing assembly 301 includes an inner arc leading piece 31, a magnetic blowing coil 33 and an outer arc leading piece 34.

[0035] The inner arc leading piece 31 is fixedly connected with one end of the magnetic blowing coil 33, the outer arc leading piece 34 is fixedly connected with the other end of the magnetic blowing coil 33, the magnetic blowing coil 33 is wound on the outer side wall of the magnetic conducting column 20, one end of the inner arc leading piece 31 away from the magnetic blowing coil 33 is fixedly connected with the inner wall of the arc extinguishing chamber 16, and the outer arc leading piece 34 is located outside the arc extinguishing chamber 16. When the working circuit is a large-current working condition, the arc connects the magnetic blowing coil 33, a larger magnetic field is generated towards the inside of the arc extinguishing chamber 16, and then the arc moves to the arc extinguishing chamber 16 and is extinguished after contacting the inner arc extinguishing grid 15.

[0036] Before use, the arc extinguishing time, arc extinguishing success rate and other indexes of the arc extinguishing device are tested by simulating working conditions of different current sizes and load types.

[0037] The utility model discloses a working time: push the adjusting block 19, and adjusting block 19 is driven magnetism column 20 through the recess 21, and magnetism column 20 drives magnetic blow assembly 301 to produce displacement, and then this can adjust the position of magnetic field, and the outer plate 11 is provided with scale, can be according to the current size reference scale accurate adjustment adjusting block 19's position, when breaking big current, the high temperature of arc production makes the ionization of surrounding air, forms the conductive channel, and then connects magnetic blow coil 33, when the position of adjusting block 19 is removed, adjusting block 19 drives stud 18, when adjusting is finished, rotates locking nut 12, can lock stud 18, and then make the position of magnetic blow assembly 301 fixed, when extinguishing arc, when breaking small current, through the cooperation of outer arc sheet 34 and outer arc extinguishing grid 22, can extinguish arc, when breaking big current, arc will connect magnetic blow coil 33, and produce the larger magnetic field towards arc extinguishing chamber 16, and arc will move to arc extinguishing chamber 16 and extinguish after contacting with inner arc extinguishing grid 15.

[0038] The above, only for the specific implementation mode of the utility model, but the protection scope of the utility model does not limit to this, any skilled in the art person in the utility model disclosed technical range can easily think of its various changes or replacement, these should cover in the protection scope of the utility model. Therefore, the protection scope of the utility model should be accurate with the protection scope of the said claim.

Claims

1. A high-efficiency arc-extinguishing device using strong magnetic blowout, comprising an arc-extinguishing assembly (101), characterized in that: The arc extinguishing assembly (101) includes two outer plates (11), a locking nut (12), an arc extinguishing chamber (16), four guide rails (17), a stud (18), two adjusting blocks (19), a magnetic post (20), and a groove (21); Two outer plates (11) are symmetrically fixed to the outer side wall of the arc-extinguishing chamber (16), four guide rails (17) are symmetrically fixed to the opposite surfaces of the two outer plates (11), the adjusting block (19) is slidably connected to the inner side wall of the guide rail (17), two grooves (21) are symmetrically opened on the opposite surfaces of the two corresponding adjusting blocks (19), the magnetic column (20) is located inside the two grooves (21), the stud (18) is fixedly connected to the top of the magnetic column (20), the magnetic blow-out assembly (301) is installed on the outside of the magnetic column (20), the locking nut (12) is threaded to the outer side wall of the stud (18), and the upper surfaces of the outer plate (11) and the guide rail (17) located above are both provided with through grooves (13).

2. The high-efficiency arc-extinguishing device with strong magnetic blowout according to claim 1, characterized in that: The stud (18) is slidably connected to the inside of the through groove (13), and the lower surface of the locking nut (12) is attached to the upper surface of the outer plate (11).

3. The high-efficiency arc-extinguishing device with strong magnetic blowout according to claim 2, characterized in that: An inner arc-extinguishing grid (15) is installed inside the arc-extinguishing chamber (16), and an arc-extinguishing mesh (14) is installed on the rear surface of the arc-extinguishing chamber (16).

4. The high-efficiency arc-extinguishing device with strong magnetic blowout according to claim 1, characterized in that: An external arc-extinguishing grid (22) is installed on the opposite surfaces of the two outer plates (11).

5. The high-efficiency arc-extinguishing device with strong magnetic blowout according to claim 1, characterized in that: Two permanent magnets (23) are symmetrically embedded inside the outer plate (11).

6. The high-efficiency arc-extinguishing device with strong magnetic blowout according to claim 1, characterized in that: The magnetic blowout assembly (301) includes an inner arc-leading plate (31), a magnetic blowout coil (33), and an outer arc-leading plate (34); The inner arc-leading plate (31) is fixedly connected to one end of the magnetic blow-out coil (33), and the outer arc-leading plate (34) is fixedly connected to the other end of the magnetic blow-out coil (33).

7. The high-efficiency arc-extinguishing device with strong magnetic blowout according to claim 6, characterized in that: The blown-out coil (33) is wound around the outer wall of the magnetic post (20).

8. The high-efficiency arc-extinguishing device with strong magnetic blowout according to claim 7, characterized in that: The inner arc-drawing plate (31) is fixedly connected to the inner wall of the arc-extinguishing chamber (16) at one end away from the magnetic blow-out coil (33), while the outer arc-drawing plate (34) is located outside the arc-extinguishing chamber (16).

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