arc suppression coil assembly and switch assembly

Abstract

The utility model discloses an arc extinguishing coil assembly and switch assembly, the outer ring of arc extinguishing coil assembly, upper insulating pad, lower insulating pad and coil cover are set in the outer circumference of inner ring, and the coil is set between the outer ring and inner ring, and the upper insulating pad is set in the outer ring and the top of coil, and the lower insulating pad is set in the outer ring and the bottom of coil, and the inner ring bottom is provided with lower flanging, and the inner ring top is provided with upper flanging, and lower flanging and upper flanging cooperate and compress the lower insulating pad and upper insulating pad to be fixed on the outer ring and coil, and upper flanging is integrally formed on the inner ring. The utility model discloses the inner ring by riveting pressure's mode integrally forms upper flanging, and upper flanging and lower flanging cooperate and compress the lower insulating pad and upper insulating pad to be fixed on the outer ring and coil, and the structure is more compact, eliminates the risk of falling off, and is more safe and reliable.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to an arc suppression coil assembly and a switch assembly. Background Technology

[0002] When a load switch or circuit breaker breaks a circuit, an electric arc is generated due to ionization during the contact breaking process. Therefore, it is necessary to use arc-extinguishing methods. Currently, commonly used arc-extinguishing methods are limited in scope and their reliability is not high enough.

[0003] Patent CN209087682U discloses a gas-insulated arc-extinguishing device. The main body includes a metal outer retaining ring, a metal inner retaining ring, an upper limit plate, a lower limit plate, a limiting spring, and a metal strip winding. The metal outer retaining ring is disposed outside the metal inner retaining ring and fixed between the upper and lower limit plates. The metal inner retaining ring passes through the middle through hole of the lower and upper limit plates and limits the lower limit plate to the outward bottom edge of the metal inner retaining ring. The limiting spring engages with the outside of the metal inner retaining ring and presses against the top of the upper limit plate. A hollow sandwich is formed between the metal outer retaining ring and the metal inner retaining ring, and the metal strip winding is wrapped around the inside of the hollow sandwich. This structural arrangement enhances the arc-extinguishing capability. The following problems exist in this structural design: (1) The inner metal retaining ring of this arc extinguishing device is fixed by a limiting snap ring. This fixing method has low reliability and is prone to falling off during vibration caused by opening and closing the circuit breaker, which causes the coil to break apart; (2) This arc extinguishing device does not have an arc-inducing tongue, which can easily cause the arc to fail to enter the coil, resulting in arc extinguishing failure and insufficient arc extinguishing reliability. Utility Model Content

[0004] To address the shortcomings of existing arc-extinguishing devices, the applicant provides a reasonably structured arc-extinguishing coil assembly and switch assembly, which are more compact and reliable in fixing, avoid the risk of falling off, and have higher arc-extinguishing reliability.

[0005] The technical solution adopted in this utility model is as follows:

[0006] An arc suppression coil assembly includes an outer ring, an upper insulating pad, a lower insulating pad, and a coil sleeved around the outer periphery of an inner ring. The coil is positioned between the outer ring and the inner ring. The upper insulating pad is positioned between the outer ring and the top of the coil, and the lower insulating pad is positioned between the outer ring and the bottom of the coil. The bottom of the inner ring has a downward flange, and the top of the inner ring has an upward flange. The downward flange and the upward flange cooperate to press and fix the lower insulating pad and the upper insulating pad onto the outer ring and the coil. The upward flange is integrally formed on the inner ring.

[0007] As a further improvement to the above technical solution:

[0008] The inner ring is integrally formed with an upper flange by riveting; the lower flange is integrally formed on the inner ring.

[0009] The wall thickness d0 of the inner ring is equal to the thickness d1 of the lower flange, and the thickness d2 of the upper flange is less than the wall thickness d0 of the inner ring.

[0010] The coil is made of several layers of copper foil, with an insulating film separating adjacent layers. The outermost copper foil is in contact with the outer ring and conducts electricity, while the innermost copper foil is in contact with the inner ring and conducts electricity.

[0011] A connecting plate is connected to the outer ring. The connecting plate includes a first connecting part connected to the outer ring and a second connecting part connected to the switch support. The fasteners of the first connecting part and the second connecting part are installed in orthogonal directions. The outer ring is a C-shaped ring, including a non-closed annular ring and connecting pieces that fold outward from both sides of the opening of the ring. The ring is fitted around the outer periphery of the coil, and the connecting pieces are connected to the connecting plate.

[0012] An arc-guiding plate is provided on the outer side of the inner ring. The arc-guiding plate is located below the lower insulating pad and connected to the inner ring. The arc-guiding plate includes an upper horizontal plate, an inclined plate, and a lower horizontal plate. The inclined plate connects the upper horizontal plate and the lower horizontal plate. The upper horizontal plate and the lower horizontal plate extend outward from the inclined plate in opposite directions.

[0013] There is a notch on the lower horizontal plate.

[0014] The upper horizontal plate is located below the lower insulating pad and extends radially inward from the upper end of the inclined plate toward the inner ring. The inner side of the upper horizontal plate is in contact with the lower flange of the inner ring. The inclined plate extends downward and outward in a direction away from the inner ring. The lower horizontal plate extends outward from the lower end of the inclined plate in a radial direction away from the inner ring. The arc-inducing plate is located directly below the connecting plate.

[0015] A switching assembly includes an arc suppression coil assembly and a first contact on a first crossbeam, the arc suppression coil assembly and the first contact being electrically connected; a second contact on a second crossbeam, an isolating blade rotatably connected to the second contact; and grounding contacts spaced apart on one side of the second crossbeam, the isolating blade rotating between the first contact and the grounding contact to switch between closing, opening, and grounding.

[0016] As a further improvement to the above technical solution:

[0017] A connector is provided on the first crossbeam. One end of the connector is connected to the arc suppression coil assembly, and the other end is connected to the first contact. The arc suppression coil assembly, the connector, and the first contact are connected in series and electrically connected. The isolation knife is mounted on the main shaft, which is rotatably connected to the support plate.

[0018] The beneficial effects of this utility model are as follows:

[0019] The inner ring of this invention is integrally formed with an upper flange by riveting. The upper flange and the lower flange work together to press and fix the lower insulating pad and the upper insulating pad to the outer ring and the coil. The structure is more compact, eliminates the risk of falling off, and the fixation is safer and more reliable.

[0020] This invention features an arc-guiding plate on the outer side of the inner ring to guide the electric arc, ensuring that the arc can be introduced into the coil, thus avoiding arc extinguishing failure and improving arc extinguishing reliability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the switch assembly of this utility model.

[0022] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0023] Figure 3 A three-dimensional view of the arc suppression coil assembly.

[0024] Figure 4 A three-dimensional view of the arc suppression coil assembly.

[0025] Figure 5 This is a cross-sectional view of the arc suppression coil assembly.

[0026] Figure 6 This is a magnified view of point B in diagram 5.

[0027] In the picture:

[0028] 100. Switch assembly;

[0029] 10. Arc suppression coil assembly; 1. Outer ring; 11. Ring portion; 12. Connecting piece; 2. Inner ring; 21. Lower flange; 22. Upper flange; 3. Upper insulating pad; 4. Lower insulating pad; 5. Coil; 6. Connecting plate; 61. First connecting part; 62. Second connecting part; 7. Arc ignition plate; 71. Upper horizontal plate; 72. Inclined plate; 73. Lower horizontal plate; 731. Notch;

[0030] 20. First crossbeam; 30. First contact seat; 40. Second crossbeam; 50. Second contact seat; 60. Grounding contact seat; 70. Spindle; 80. Isolation knife; 90. Connector; 901. Screw. Detailed Implementation

[0031] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0032] like Figure 1The switch assembly 100 of this invention includes an arc-suppression coil assembly 10, a first crossbeam 20, a first contact 30, a second crossbeam 40, a second contact 50, a grounding contact 60, a main shaft 70, and an isolating blade 80. The first crossbeam 20 and the second crossbeam 40 are arranged vertically at intervals. The arc-suppression coil assembly 10 and the first contact 30 are mounted on the first crossbeam 20 and are electrically connected. The second contact 50 is mounted on the second crossbeam 40, and the isolating blade 80 is rotatably connected to the second contact 50. The grounding contact 60 is located on one side of the second crossbeam 40 and has a gap between it and the second crossbeam 40. The main shaft 70 is rotatably connected to a support plate of the switch assembly 100 and can be driven to rotate by a drive mechanism. The isolating blade 80 passes through the main shaft 70 and can be driven to rotate between the first contact 30 and the grounding contact 60 to switch between closing, opening, and grounding.

[0033] like Figure 1 , Figure 2 As shown, a connector 90 is provided on the first crossbeam 20. One end of the connector 90 is connected to the arc suppression coil assembly 10 by a screw 901, and the other end is connected to the first contact 30. The arc suppression coil assembly 10, the connector 90, and the first contact 30 are connected in series and electrically connected, forming a circuit when the switch is closed or opened and an electric arc is generated.

[0034] like Figures 3 to 5 As shown, the arc-suppression coil assembly 10 of this utility model includes an outer ring 1, an inner ring 2, an upper insulating pad 3, a lower insulating pad 4, a coil 5, a connecting plate 6, and an arc-inducing plate 7. The outer ring 1, the upper insulating pad 3, the lower insulating pad 4, and the coil 5 are sleeved around the outer circumference of the inner ring 2. The coil 5 serves as an interlayer, positioned between the outer ring 1 and the inner ring 2. The upper insulating pad 3 covers the top of the outer ring 1 and the coil 5, and the lower insulating pad 4 covers the bottom of the outer ring 1 and the coil 5. The connecting plate 6 is fixedly connected to the outer ring 1. The arc-inducing plate 7 is positioned below the lower insulating pad 4 and connected to the inner ring 2; the arc-inducing plate 7 is located directly below the connecting plate 6.

[0035] like Figure 4 , Figure 5 As shown, the outer ring 1 is a C-shaped ring, including a non-closed annular ring portion 11 and connecting pieces 12 that fold outward from both sides of the opening of the ring portion 11. The ring portion 11 is sleeved on the outer periphery of the coil 5, and the connecting pieces 12 are connected to the connecting plate 6 by fasteners.

[0036] like Figure 5 , Figure 6As shown, the inner ring 2 is a closed circular ring. The bottom of the inner ring 2 has a lower flange 21 that extends radially outward, and the top of the inner ring 2 has an upper flange 22 that extends radially outward. The lower flange 21 and the upper flange 22 work together to press and fix the lower insulating pad 4 and the upper insulating pad 3 onto the outer ring 1 and the coil 5. The upper insulating pad 3 and the lower insulating pad 4 reliably fix the coil 5 and protect it from arc burnout. The inner ring 2, the lower flange 21, and the upper flange 22 are integrally formed, with the upper flange 22 formed by riveting and folding. The wall thickness d0 of the inner ring 2 is equal to the thickness d1 of the lower flange 21, and the thickness d2 of the upper flange 22 is less than the wall thickness d0 of the inner ring 2, facilitating the riveting formation of the upper flange 22. The inner ring 2 is integrally formed with an upper flange 22 by riveting. The upper flange 22 and the lower flange 21 work together to press and fix the lower insulating pad 4 and the upper insulating pad 3 onto the outer ring 1 and the coil 5. The structure is more compact, eliminating the risk of falling off and making the fixation safer and more reliable.

[0037] Coil 5 is made of several layers of copper foil, about 25-30 layers, with an insulating film separating adjacent layers. The outermost copper foil is in contact with the outer ring 1 and is conductive, while the innermost copper foil is in contact with the inner ring 2 and is conductive, thus realizing the strong effect of the magnetic field generated by coil 5 on the electric arc.

[0038] like Figure 4 , Figure 5 As shown, the connecting plate 6 includes a first connecting portion 61 connected to the outer ring 1 and a second connecting portion 62 connected to the switch support. The fasteners of the first connecting portion 61 and the second connecting portion 62 are installed in orthogonal directions. In this embodiment, the fasteners of the first connecting portion 61 are installed in the front-to-back direction, and the fasteners of the second connecting portion 62 are installed in the left-to-right direction. Figure 2 , Figure 5 As shown, the first connecting part 61 is connected to the connecting piece 12 of the outer ring 1 by a fastener, and the second connecting part 62 is connected to the connector 90 by a screw 901.

[0039] like Figure 4 , Figure 5 As shown, the arc-inducing plate 7 includes an upper horizontal plate 71, an inclined plate 72, and a lower horizontal plate 73. The inclined plate 72 connects the upper horizontal plate 71 and the lower horizontal plate 73. The upper horizontal plate 71 and the lower horizontal plate 73 extend outward from the inclined plate 72 in opposite directions. The upper horizontal plate 71 is located below the lower insulating pad 4 and extends radially inward from the upper end of the inclined plate 72 toward the inner ring 2. The inner side of the upper horizontal plate 71 is in contact with the lower flange 21 of the inner ring 2. The inclined plate 72 extends downward and obliquely outward away from the inner ring 2. The lower horizontal plate 73 extends outward from the lower end of the inclined plate 72 in a radial direction away from the inner ring 2. A notch 731 is provided on the lower horizontal plate 73, such as... Figure 2As shown, the notch 731 non-contactly surrounds the first contact 30, bringing the arc-extinguishing coil assembly 10 closer to the arc initiation position, increasing the arc contact range, reducing the arc transfer time, and improving the arc extinguishing efficiency. An arc-initiating plate 7 is provided on the outer side of the inner ring 2 of the arc-extinguishing coil assembly 10 to guide the arc, ensuring that the arc can be introduced into the coil 5, avoiding arc extinguishing failure, and improving arc extinguishing reliability.

[0040] The above description is an explanation of the present utility model and not a limitation thereof. The present utility model can be modified in any form without departing from its spirit.

Claims

1. An arc-suppression coil assembly, wherein an outer ring (1), an upper insulating pad (3), a lower insulating pad (4), and a coil (5) are sleeved on the outer periphery of an inner ring (2), the coil (5) is disposed between the outer ring (1) and the inner ring (2), the upper insulating pad (3) is disposed at the top of the outer ring (1) and the coil (5), and the lower insulating pad (4) is disposed at the bottom of the outer ring (1) and the coil (5), characterized in that: The bottom of the inner ring (2) is provided with a lower flange (21), and the top of the inner ring (2) is provided with an upper flange (22). The lower flange (21) and the upper flange (22) work together to press and fix the lower insulating pad (4) and the upper insulating pad (3) onto the outer ring (1) and the coil (5). The upper flange (22) is integrally formed on the inner ring (2).

2. The arc suppression coil assembly according to claim 1, characterized in that: The inner ring (2) is integrally formed with an upper flange (22) by riveting; the lower flange (21) is integrally formed on the inner ring (2).

3. The arc suppression coil assembly according to claim 1, characterized in that: The wall thickness d0 of the inner ring (2) is equal to the thickness d1 of the lower flange (21), and the thickness d2 of the upper flange (22) is less than the wall thickness d0 of the inner ring (2).

4. The arc suppression coil assembly according to claim 1, characterized in that: The coil (5) is made of several layers of copper foil. An insulating film is used to separate adjacent layers. The outermost copper foil is in contact with the outer ring (1) and conducts, while the innermost copper foil is in contact with the inner ring (2).

5. The arc suppression coil assembly according to claim 1, characterized in that: A connecting plate (6) is connected to the outer ring (1). The connecting plate (6) includes a first connecting part (61) connected to the outer ring (1) and a second connecting part (62) connected to the switch support. The fastener installation directions of the first connecting part (61) and the second connecting part (62) are orthogonal. The outer ring (1) is a C-shaped ring, including a non-closed circular ring part (11) and connecting pieces (12) that fold outward from both sides of the opening of the ring part (11). The ring part (11) is sleeved on the outer periphery of the coil (5), and the connecting pieces (12) are connected to the connecting plate (6).

6. The arc suppression coil assembly according to claim 1, characterized in that: An arc-inducing plate (7) is provided on the outer side of the inner ring (2). The arc-inducing plate (7) is located below the lower insulating pad (4) and connected to the inner ring (2). The arc-inducing plate (7) includes an upper horizontal plate (71), an inclined plate (72) and a lower horizontal plate (73). The inclined plate (72) connects the upper horizontal plate (71) and the lower horizontal plate (73). The upper horizontal plate (71) and the lower horizontal plate (73) extend outward from the inclined plate (72) in opposite directions.

7. The arc suppression coil assembly according to claim 6, characterized in that: A notch (731) is provided on the lower horizontal plate (73).

8. The arc suppression coil assembly according to claim 6, characterized in that: The upper horizontal plate (71) is located below the lower insulating pad (4) and extends radially inward from the upper end of the inclined plate (72) toward the inner ring (2). The inner side of the upper horizontal plate (71) is in contact with the lower flange (21) of the inner ring (2). The inclined plate (72) extends downward and outward in a direction away from the inner ring (2). The lower horizontal plate (73) extends outward from the lower end of the inclined plate (72) in a radial direction away from the inner ring (2). The arc-inducing plate (7) is located directly below the connecting plate (6).

9. A switching assembly, characterized in that: The arc-suppression coil assembly (10) and the first contact (30) as described in claim 1 are provided on the first crossbeam (20), and the arc-suppression coil assembly (10) and the first contact (30) are electrically connected; the second contact (50) is provided on the second crossbeam (40), and the isolating blade (80) is rotatably connected to the second contact (50); a grounding contact (60) is provided at intervals on one side of the second crossbeam (40), and the isolating blade (80) rotates between the first contact (30) and the grounding contact (60) to switch between closing, opening and grounding.

10. The switching assembly according to claim 9, characterized in that: A connector (90) is provided on the first crossbeam (20). One end of the connector (90) is connected to the arc suppression coil assembly (10), and the other end is connected to the first contact seat (30). The arc suppression coil assembly (10), the connector (90), and the first contact seat (30) are connected in series and electrically connected. The isolation knife (80) is mounted on the main shaft (70), and the main shaft (70) is rotatably connected to the support plate.

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