Arc extinguish chamber module and switch equipment

Abstract

The utility model relates to an arc extinguish chamber module and switch equipment, the arc extinguish chamber module comprises an arc extinguish chamber, the arc extinguish chamber comprises a grid sheet assembly and flash barriers oppositely arranged at two ends of the grid sheet assembly, and the grid sheet assembly comprises a first grid sheet group, a second grid sheet group and a third grid sheet group which are sequentially and longitudinally arranged at intervals. The first grid plate group is located at the lower end of the arc extinguish chamber, the first grid plate group and the second grid plate group comprise a pair of first permanent magnets with the same polarity and placed at the rear positions of the two sides of the arc extinguish chamber, the third grid plate group is divided into a left first grid plate column and a right second grid plate column, and a second permanent magnet is placed in the middle. According to the utility model, the number of the grid sheets is increased in a limited space, a permanent magnet magnetic field and the arc extinguishing grid sheets are better utilized, the number of the arc extinguishing grid sheets is increased, the coverage area of the magnetic field to the arc extinguishing chamber is increased, the speed of an arc entering the arc extinguishing chamber is improved, and the arc extinguishing capability is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of circuit breaker technology and relates to an arc-extinguishing chamber module and switch equipment. BACKGROUND

[0002] In the field of DC disconnectors, due to the small breaking current, only the grid sheet is used as the arc-extinguishing approach, which has poor effect and is difficult to achieve high-voltage arc-extinguishing, so a permanent magnet is added for auxiliary arc-extinguishing, and the magnetic field of the permanent magnet makes the arc be quickly lengthened and the arc be quickly extinguished. As described in CN221529747U, the arc-extinguishing grid sheet is arranged in one piece, the permanent magnet is arranged at the middle position inside the arc-extinguishing chamber, and the area of the grid sheet is occupied by the permanent magnet, so the effective arc-extinguishing area is reduced and the ability of the grid sheet to carry the arc is reduced. As described in CN221651437U, the permanent magnet is arranged at the middle of the upper end of the arc-extinguishing chamber, and the arc-extinguishing system is composed of two arc-extinguishing chambers. The arc-extinguishing chamber is difficult to rivet, contains two arc-extinguishing chambers, and has high cost. The middle of all the grid sheets is used for mounting the permanent magnet, so the area of the grid sheet used for arc-extinguishing is reduced and the ability of the grid sheet to carry the arc is reduced. SUMMARY

[0003] The utility model aims to provide an arc-extinguishing chamber module and switch equipment, the arc-extinguishing chamber module adds a permanent magnet for auxiliary arc-extinguishing, adopts a complete arc-extinguishing chamber, the permanent magnet at the lower end of the arc-extinguishing chamber is located behind the arc-extinguishing grid sheet, the permanent magnet at the upper end of the arc-extinguishing chamber is located between the arc-extinguishing grid sheets, the magnetic field of the permanent magnet is distributed in all positions of the arc-extinguishing chamber, the coverage area of the magnetic field on the arc-extinguishing chamber is increased, the speed of the arc entering the grid sheet is increased, and the arc-extinguishing speed and arc-extinguishing ability are improved.

[0004] The utility model can achieve the purpose by the following technical solutions.

[0005] The utility model discloses a kind of arc-extinguishing chamber modules, arc-extinguishing chamber module is located in circuit breaker, the circuit breaker includes static contact and moving contact, the arc-extinguishing chamber module includes arc-extinguishing chamber, the arc-extinguishing chamber includes grid sheet assembly and the arc-extinguishing plate opposite at the both ends of grid sheet assembly, the grid sheet assembly includes first grid sheet group, second grid sheet group, third grid sheet group sequentially vertically spaced arrangement, the first grid sheet group is located at the lower end of arc-extinguishing chamber,

[0006] The static contact is close to the bottom side of the first grid sheet group and is arranged, and the moving contact is close to the third grid sheet group and is arranged;

[0007] The grid sheet in the first grid sheet group and the second grid sheet group, the front side both ends are stretched forward to form front stretch and the first let slot between front stretch, rear side is equipped with rear stretch;The rear stretch both sides are equipped with first permanent magnet, both sides first permanent magnet same polarity is opposite and is arranged;

[0008] The third grid group includes a first grid column and a second grid column arranged transversely side by side, the grids in the first grid column and the second grid column are provided with a second displacement slot between the front ends and a second permanent magnet between the rear ends, the first displacement slot and the second displacement slot are connected to allow the moving contact to pass through and generate an arc.

[0009] Further, the arc-extinguishing chamber module further includes a first shell, the first shell includes an arc-extinguishing chamber mounting cavity and a first mounting cavity located at the rear of the arc-extinguishing chamber mounting cavity, the arc-extinguishing chamber mounting cavity is used to place the arc-extinguishing chamber, and the first permanent magnet is placed in the first mounting cavity, and the magnetic field of the permanent magnet causes the arc to be quickly elongated, thereby accelerating the arc extinction.

[0010] Further, the arc-extinguishing chamber module further includes a second shell, the second shell includes a second shell body, a second mounting cavity, and a plurality of groups of mounting slots arranged on both sides of the second shell body, and the second permanent magnet is placed in the second mounting cavity, i.e., the second permanent magnet is located between the arc-extinguishing grids, so that the magnetic field of the permanent magnet and the arc-extinguishing grids are better utilized, the number of arc-extinguishing grids is increased, the coverage area of the magnetic field on the arc-extinguishing chamber is increased, the speed of the arc entering the arc-extinguishing chamber is improved, and the arc-extinguishing capability is improved.

[0011] Further, the mounting slots are formed by a plurality of parallel convex edges, and the plurality of groups of mounting slots are parallel to each other.

[0012] Further, the first permanent magnet and the second permanent magnet cause the magnetic field to be distributed to all positions of the arc-extinguishing chamber, increase the coverage area of the magnetic field on the arc-extinguishing chamber, accelerate the speed of the arc entering the grids, improve the arc-extinguishing speed and arc-extinguishing capability.

[0013] Further, the first grid group and the second grid group are connected, the first grid column and the second grid column are interrupted, the interruption is used to mount the second shell, and the mounting slots are in close contact with the third grid group at the interruption.

[0014] Further, the first shell adopts a gas-producing insulating shell, for example, a gas-producing insulating shell made of flame-retardant reinforced nylon 66, flame-retardant reinforced nylon 46, flame-retardant reinforced nylon 6, PPA (Polyphthalamide, high-temperature-resistant nylon), etc.

[0015] Further, the second shell adopts a gas-producing insulating shell, for example, a gas-producing insulating shell made of flame-retardant reinforced nylon 66, flame-retardant reinforced nylon 46, flame-retardant reinforced nylon 6, PPA, etc. These shells can accelerate the arc entering the arc-extinguishing chamber and are more conducive to arc extinction.

[0016] Further, the first grid group further has an arc guide corner at the bottom.

[0017] Further, the first permanent magnet and the second permanent magnet are respectively composed of at least one permanent magnet.

[0018] The utility model discloses a second aspect provides a kind of switch device, and the switch device is equipped with above-mentioned arc-extinguishing chamber module inside.This arc-extinguishing chamber module is used to attract the arc produced when moving contact and static contact open and close into the grid sheet of arc-extinguishing chamber quickly, cut arc, extinguish arc, improve arc-extinguishing ability, guarantee the normal use and safety of switch.

[0019] Compared with prior art, the utility model has the beneficial effects that:

[0020] 1)The utility model provides a kind of arc-extinguishing chamber module, and the permanent magnet introduced in arc-extinguishing chamber module does not affect the positive and negative polarity wiring position of switch, realizes the non-polarity of switch;

[0021] 2)The utility model provides a kind of arc-extinguishing chamber module, and the permanent magnet magnetic field distribution is all positions of arc-extinguishing chamber, increases the coverage area of magnetic field to arc-extinguishing chamber, speeds up the speed of arc into grid sheet, improves arc-extinguishing speed and arc-extinguishing ability;

[0022] 3)The utility model provides a kind of arc-extinguishing chamber module, and the number of grid sheet is maximized in limited space, and arc-extinguishing ability is improved;

[0023] 4)The shell in arc-extinguishing chamber module uses gas-producing insulating material, speeds up arc into arc-extinguishing chamber, and is more conducive to arc-extinguishing. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the overall structure schematic diagram of arc-extinguishing chamber module in embodiment 1;

[0025] Figure 2 It is the explosion drawing of arc-extinguishing chamber module in embodiment 1;

[0026] Figure 3 It is the arc-extinguishing chamber schematic diagram of arc-extinguishing chamber module in embodiment 1;

[0027] Figure 4 It is the schematic diagram of second shell of arc-extinguishing chamber module in embodiment 1;

[0028] Figure 5 It is the schematic diagram of first shell of arc-extinguishing chamber module in embodiment 1;

[0029] Figure 6 It is the arc schematic diagram of moving contact and static contact breaking assumption in embodiment 1;

[0030] Figure 7 It is the rear view of arc-extinguishing chamber module in embodiment 1;

[0031] Figure 8 It is the left view of arc-extinguishing chamber module in embodiment 1;

[0032] Figure 9 For Figure 8 A-A sectional view and schematic diagram of the movement trajectory of the assumed generated arc in the direction of the specified magnetic field;

[0033] Figure 10 For Figure 8 B-B sectional view and schematic diagram of the movement trajectory of the assumed generated arc in the direction of the specified magnetic field;

[0034] Figure 11 The exploded view of the arc extinguishing chamber module in Example 2;

[0035] Marked in the figure:

[0036] 1-arc extinguishing chamber, 11-first grid group, 12-second grid group, 13-third grid group, 14-separation plate, 111-arc initiation angle, 2-first shell, 21-arc extinguishing chamber mounting cavity, 22-first mounting cavity, 3-first permanent magnet, 4-second shell, 41-mounting groove, 42-second mounting cavity, 5-second permanent magnet, 6-arc, 7-static contact, 8-moving contact;

[0037] a-arc trajectory one, b-arc trajectory two. DETAILED DESCRIPTION

[0038] The utility model will be explained in detail below in combination with the drawings and specific embodiments. The following examples are implemented on the premise of the above technical solutions of the utility model, and detailed implementation modes and specific operation processes are given, but the protection scope of the utility model is not limited to the following examples.

[0039] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] Some embodiments of the utility model will be explained in detail below in combination with the drawings. In the case of no conflict, the following examples and features in examples can be combined with each other.

[0041] In the following examples, if no special description of raw materials or processing technology, it indicates that they are all conventional commercially available raw material products or conventional processing technology in the art. If no special description of functional components or structure, it indicates that they are all conventional components or conventional structure adopted in the art to realize the corresponding function.

[0042] Example 1:

[0043] Figure 1It is a schematic diagram of the overall structure of the arc-extinguishing chamber module in the embodiment, the arc-extinguishing chamber module is arranged in a circuit breaker, the circuit breaker comprises a static contact 7 and a moving contact 8, and the main function of the arc-extinguishing chamber module is to quickly attract the arc generated when the static contact and the moving contact are switched into or out of the grid fins of the arc-extinguishing chamber, cut the arc, extinguish the arc, improve the arc-extinguishing capability, and ensure the normal use and safety of the switch. Figure 2 It is an exploded view of the arc-extinguishing chamber module in the embodiment, Figure 3 It is a schematic diagram of the arc-extinguishing chamber of the arc-extinguishing chamber module in the embodiment, Figure 7 It is a rear view of the arc-extinguishing chamber module in the embodiment, Figure 8 It is a left view of the arc-extinguishing chamber module in the embodiment, and it can be seen that the arc-extinguishing chamber module comprises an arc-extinguishing chamber 1, the arc-extinguishing chamber 1 comprises a grid fin assembly and arc-shedding plates 14 arranged opposite to both ends of the grid fin assembly, the grid fin assembly comprises a first grid fin group 11, a second grid fin group 12 and a third grid fin group 13 arranged longitudinally and spaced apart in sequence, the first grid fin group 11 is located at the lower end of the arc-extinguishing chamber 1, an arc guiding horn 111 is further arranged at the bottom of the first grid fin group 11, the static contact 7 is arranged close to the bottom side of the first grid fin group 11, and the moving contact 8 is arranged close to the third grid fin group 13; the grid fins in the first grid fin group 11 and the second grid fin group 12 have front ends extending forward to form front extension portions and first displacement slots between the front extension portions, and have rear extension portions arranged at the rear sides; the first displacement slots are in communication between the first grid fin group 11 and the second grid fin group 12; first permanent magnets 3 are arranged at both sides of the rear extension portions, and the first permanent magnets 3 at both sides are arranged with the same polarity opposite to each other; the third grid fin group 13 comprises a first grid fin row and a second grid fin row arranged transversely and side by side, the grid fins in the first grid fin row and the second grid fin row have a second displacement slot arranged between the front ends and a second permanent magnet 5 arranged between the rear ends, and the first displacement slot and the second displacement slot are in communication to allow the moving contact to pass through and generate an arc.

[0044] The arc-extinguishing chamber module further comprises a first shell 2( Figure 4 ) and a second shell 4( Figure 5), the first shell 2 and the second shell 4 adopt gas generating insulation shells, for example, gas generating insulation shells made of flame-retardant reinforced nylon 66, flame-retardant reinforced nylon 46, flame-retardant reinforced nylon 6, PPA, etc., which can accelerate the arc into the arc extinguishing chamber and be more conducive to arc extinguishing. The first shell 2 includes an arc extinguishing chamber mounting cavity 21 for placing the arc extinguishing chamber 1 and a first mounting cavity 22 behind the arc extinguishing chamber mounting cavity 21, and the first permanent magnet 3 is placed in the first mounting cavity 22. The magnetic field of the permanent magnet makes the arc quickly lengthen and accelerate arc extinguishing. The first row of grid fins and the second row of grid fins are interrupted, and the interruption is used to mount the second shell 4. The second shell 4 includes a second shell body, a second mounting cavity 42, and a plurality of groups of mounting grooves 41 arranged on both sides of the second shell body. The mounting grooves 41 are formed by a plurality of parallel convex edges, the plurality of groups of mounting grooves 41 are parallel to each other, and the mounting grooves 41 are in close contact with the third group of grid fins 13 at the interruption. The second permanent magnet 5 is placed in the second mounting cavity 42, i.e., the second permanent magnet 5 is located between the arc extinguishing grid fins. The magnetic field of the permanent magnet is better utilized with the arc extinguishing grid fins. The number of arc extinguishing grid fins is increased, and the coverage area of the magnetic field on the arc extinguishing chamber is also increased. The speed of the arc into the arc extinguishing chamber is improved, and the arc extinguishing capacity is improved. The first permanent magnet and the second permanent magnet make the magnetic field distribute to all positions of the arc extinguishing chamber. The coverage area of the magnetic field on the arc extinguishing chamber is increased. The speed of the arc into the grid fins is accelerated, and the arc extinguishing speed and arc extinguishing capacity are improved.

[0045] After the arc extinguishing chamber module in the embodiment is assembled to form a switch device, the specific working process of the arc extinguishing chamber module is as follows:

[0046] As shown in Figure 6 , when the switch is turned off, an arc 6 is generated between the moving and stationary contacts. When the arc 6 is located near the second group of grid fins 12 at the lower end of the arc extinguishing chamber module, the arc 6 quickly enters one side of the arc extinguishing chamber module under the action of the magnetic field of a pair of same-pole opposite first permanent magnets 3. When the arc 6 is located near the third group of grid fins 13 at the upper end of the arc extinguishing chamber module, the arc 6 quickly enters one side of the arc extinguishing chamber module under the action of the magnetic field of the second permanent magnet 5. Figure 9 One case is described. It is assumed that the direction of the arc 6 is from top to bottom when viewed from above the arc extinguishing chamber module, i.e., in any cross-sectional plane, the arc 6 is located near the second group of grid fins 12 at the lower end of the arc extinguishing chamber module. Under the action of the N-pole and S-pole first permanent magnets 3 as shown in Figure 9 , the arc 6 will move along an arc trajectory a similar to that shown in the figure under the influence of the magnetic field. Under the action of the first permanent magnets 3 and the gas blowing, the arc 6 will move over a larger area on the second group of grid fins 12, increasing the effective arc extinguishing area of the grid fins. When the arc 6 is located near the third group of grid fins 13 at the upper end of the arc extinguishing chamber module, the arc 6 will move along an arc trajectory b similar to that shown in the figure under the influence of the magnetic field of the second permanent magnet 5. Figure 10The electric arc 6 can quickly enter the grid sheet 13 along the similar electric arc trajectory IIb under the magnetic field of the second permanent magnet 5 of the N-pole and S-pole, the magnetic field of the permanent magnet can act on the arc chamber module at any position, the arc 6 is extinguished quickly, and the breaking capacity of the switch is improved.

[0047] The first permanent magnet 3 and the second permanent magnet 5 are arranged at the lower end of the arc chamber 1, the first permanent magnet 3 and the second permanent magnet 5 are arranged at the two sides of the arc chamber 1, the upper end of the arc chamber 1 is provided with the third grid sheet group 13, the third grid sheet group 13 is divided into a left first grid sheet column, a right first grid sheet column and a second grid sheet column, the second permanent magnet 5 is arranged between the left first grid sheet column and the right first grid sheet column, the number of the grid sheets is increased, the magnetic field of the permanent magnet and the grid sheet are better utilized, the number of the grid sheets is increased, the coverage area of the magnetic field on the arc chamber is increased, the speed of the electric arc entering the arc chamber is increased, and the arc extinguishing capacity is improved.

[0048] Embodiment 2

[0049] Compared with the embodiment 1, the embodiment 2 is different only in that the first permanent magnet 3 and the second permanent magnet 5 are respectively composed of a plurality of permanent magnets, and the rest is the same as the embodiment 1. Figure 11 As shown in the figure, specifically, the first permanent magnet 3 is composed of seven permanent magnets, and the second permanent magnet 5 is composed of three permanent magnets.

[0050] The above description of the embodiments is for facilitating the ordinary skilled in the art to understand and use the utility model. The person skilled in the art can obviously easily make various modifications to the embodiments, and apply the general principles described herein to other embodiments without the creative labor. Therefore, the utility model is not limited to the above embodiments, and the improvements and modifications made by the person skilled in the art according to the disclosure of the utility model without departing from the scope of the utility model should be within the protection scope of the utility model.

Claims

1. An arc extinguishing chamber module, arranged in a circuit breaker, the circuit breaker comprising a static contact (7) and a moving contact (8), the arc extinguishing chamber module comprising an arc extinguishing chamber (1), the arc extinguishing chamber (1) comprising a grid assembly and arc isolation plates (14) arranged at both ends of the grid assembly, characterized in that: The grid assembly comprises a first grid group (11), a second grid group (12), and a third grid group (13) which are arranged in sequence and spaced apart longitudinally. The first grid group (11) is located at the lower end of the arc extinguishing chamber (1). The static contact (7) is arranged close to the bottom side of the first grid plate group (11), and the moving contact (8) is arranged close to the third grid plate group (13); The grid plates in the first grid plate group (11) and the second grid plate group (12) have two ends on the front side extending forward to form a front extension portion and a first clearance groove between the front extension portions, and a rear extension portion is provided on the rear side; first permanent magnets (3) are respectively provided on both sides of the rear extension portion, and the first permanent magnets (3) on both sides are arranged opposite to each other with the same poles; The third grid plate group (13) includes a first grid plate column and a second grid plate column that are arranged in parallel in a transverse direction. The grid plates in the first grid plate column and the second grid plate column have a second clearance groove between their front ends and a second permanent magnet (5) between their rear ends. The first clearance groove and the second clearance groove are connected to allow a moving contact to pass through and generate an arc.

2. The arc extinguishing chamber module according to claim 1, characterized in that: The arc extinguishing chamber module further comprises a first shell (2), the first shell (2) comprising an arc extinguishing chamber mounting cavity (21) and a first mounting cavity (22) located behind the arc extinguishing chamber mounting cavity (21), the arc extinguishing chamber mounting cavity (21) being used for placing the arc extinguishing chamber (1), and the first permanent magnet (3) being placed in the first mounting cavity (22).

3. The arc extinguishing chamber module according to claim 2, characterized in that: The arc extinguishing chamber module further comprises a second shell (4), the second shell (4) comprising a second shell body, a second mounting cavity (42), and a plurality of mounting grooves (41) provided on both sides of the second shell body, the second permanent magnet (5) being placed in the second mounting cavity (42).

4. The arc extinguishing chamber module according to claim 3, characterized in that: The installation grooves (41) are formed by a plurality of parallel ridges, and the plurality of groups of installation grooves (41) are parallel to each other.

5. The arc extinguishing chamber module according to claim 3, characterized in that: The first grid plate group (11) is connected to the second grid plate group (12), and there is a discontinuity between the first grid plate column and the second grid plate column. The discontinuity is used to install the second shell (4), and the installation groove (41) is tightly against the third grid plate group (13) at the discontinuity.

6. The arc extinguishing chamber module according to claim 3, characterized in that: The first shell (2) is a gas-generating insulating shell.

7. The arc extinguishing chamber module according to claim 3, characterized in that: The second shell (4) is a gas-generating insulating shell.

8. The arc extinguishing chamber module according to claim 1, characterized in that: An arc starting angle (111) is also provided at the bottom of the first grid plate group (11).

9. The arc extinguishing chamber module according to claim 1, characterized in that: The first permanent magnet (3) and the second permanent magnet (5) are respectively composed of at least one permanent magnet.

10. A switchgear, characterized in that: The switchgear is equipped with the arc extinguishing chamber module according to any one of claims 1 to 9.

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