CN116721888A - Relay capable of improving arc extinguishing performance - Google Patents

Abstract

The invention provides a relay for improving arc extinguishing performance, and relates to the technical field of electric power. The relay comprises a contact assembly, a magnetic circuit assembly and an arc isolation structure, wherein the contact assembly comprises a movable reed and a static reed, the magnetic circuit assembly comprises a coil, and a magnetic field generated by the coil can drive the movable reed and the static reed to be contacted or separated. The arc isolation structure is arranged between the contact part of the contact assembly and the coil and is used for isolating an arc generated at the contact part between the movable reed and the static reed when the movable reed and the static reed are separated. An arc isolation structure is disposed at least partially around the coil for increasing the arc stretch movement space. The arc isolation structure is arranged between the coil and the contact part of the contact assembly, and plays a role in blocking and isolating electric arcs. The arc isolation structure is at least partially arranged around the coil, plays a role in protecting the coil to a certain extent, reduces the risk of arc ablation on the coil, increases the space for extending and moving under the condition of not increasing the volume of the relay, and is beneficial to quick arc extinction.

Description

Relay capable of improving arc extinguishing performance

Technical Field

The present invention relates generally to the field of power technology, and more particularly to a relay that improves arc extinguishing performance.

Background

When the relay breaks a large load, extremely high energy arc can be generated between the relays, contacts are easy to ablate, so that most high-power relays cannot meet the high-voltage and high-current load, or the relay capable of breaking the high-voltage and high-current is very large in size and high in cost.

In order to reduce arc ablation contacts, the arc is blocked by adopting an arc blocking structure in the prior art, and the arc moving space generated when the contacts are disconnected is smaller because the arc blocking structure is of a straight plate type structure, and the arc moving speed is slower, so that the rapid arc extinction is not facilitated.

Disclosure of Invention

The relay for improving the arc extinguishing performance provided by the invention improves the arc extinguishing capability and the internal space utilization rate, and meets the miniaturization requirement.

According to an aspect of the present invention, there is provided a relay for improving arc extinguishing performance, comprising:

the contact assembly comprises a movable reed and a static reed;

the magnetic circuit assembly comprises a coil, and a magnetic field generated by the coil can drive the contact or separation of the movable reed and the static reed;

the arc isolation structure is arranged between the contact part of the contact assembly and the coil and is used for isolating an arc generated at the contact part between the movable reed and the static reed when the movable reed and the static reed are separated;

wherein the arc isolation structure is disposed at least partially around the coil.

In some of these embodiments, the arc isolation structure comprises:

the retaining wall is arranged between the contact part of the contact assembly and the coil;

the retaining wall is of a V-shaped structure, the opening end of the V-shaped structure faces the coil, and the V-shaped structure at least partially surrounds the outside of the coil.

In some embodiments, the distance between the center of the retaining wall and the datum line is less than the distance between the end of the retaining wall and the datum line;

the movable contact is arranged on one side of the movable reed, which faces the movable reed, the fixed contact is arranged on one side of the movable reed, which faces the movable reed, the movable contact and the fixed contact are contacted or separated with each other to form a contact group, the contact group forms at least part of a contact part of the contact assembly, and the datum line is a connecting line between the two contact groups.

In some of these embodiments, the retaining wall and the datum line increase gradually from the center of the retaining wall to the ends of the retaining wall.

In some embodiments, the retaining wall is an arcuate structure from the center of the retaining wall to the ends of the retaining wall; or alternatively, the first and second heat exchangers may be,

the retaining wall includes a plurality of interconnected steps from a center of the retaining wall to an end of the retaining wall.

In some of these embodiments, the arc isolation structure further comprises:

and the bending part is connected with the end part of the retaining wall, and the retaining wall and the bending part at least partially surround the outside of the coil.

In some of these embodiments, the arc isolation structure further comprises:

the blocking part is connected between the bending part and the retaining wall, the coil is electrically connected to the coil leading-out end, and the blocking part is used for blocking the electric arc from moving to the coil leading-out end.

In some embodiments, the arc isolation structure further comprises an insulating portion disposed between the contact assembly and the retaining wall, the insulating portion being disposed between two of the contact sets.

In some of these embodiments, the magnetic circuit assembly further comprises:

the coil rack is used for winding the coil, two ends of the coil rack along the axial direction of the coil rack are respectively provided with two flanges, and the flanges are used for limiting the coil;

one of the flange and the arc isolation structure is provided with a clamping protrusion, and the other is provided with a clamping groove, and the clamping protrusion is clamped in the clamping groove.

In some of these embodiments, the relay further comprises:

the two arc-extinguishing chambers are respectively and correspondingly arranged with the two contact sets, and are arranged among the contact part, the retaining wall, the bending part and the coil rack of the contact assembly;

a magnetic field assembly disposed around the contact portion of the contact assembly;

the contact surface between the movable contact and the fixed contact and the movable reed are perpendicular to the axial direction of the coil, so that a magnetic field generated by the magnetic field assembly can respectively move the electric arcs generated when the two contact sets are disconnected to the two arc extinguishing chambers.

In some of these embodiments, the relay further comprises:

the static spring support is inserted on the static spring support;

wherein, quiet spring support with separate the arc structure and be integrated into one piece structure.

In some embodiments, the relay further comprises a yoke, the yoke comprises a horizontal portion and a vertical portion, the horizontal portion and the vertical portion are perpendicularly connected, the vertical portion is arranged on one side, away from the contact assembly, of the coil, the vertical portion is connected with the movable spring, the coil rack is provided with a through hole, the static spring support is provided with a slot corresponding to the through hole, and the horizontal portion penetrates through the through hole and is clamped in the clamping slot.

In some of these embodiments, the relay further comprises:

the arc extinguishing bars are arranged in parallel at intervals and are arranged in the arc extinguishing chamber.

In some embodiments, the arc isolation structure is made of an insulating material.

In some embodiments, the arc isolation structure is made of at least one of a ceramic material, a plastic material, or a gas generating material.

One embodiment of the present invention has the following advantages or benefits:

the relay for improving the arc extinguishing performance provided by the embodiment of the invention has the advantages that the arc isolation structure is arranged between the coil and the contact part of the contact assembly, and the arc isolation structure plays a role in isolating an arc. The arc isolation structure at least partially surrounds the coil, plays a role in protecting the coil to a certain extent, reduces the risk of arc ablation on the coil by isolating the arc, and meanwhile, increases the space for extending and moving under the condition of not increasing the volume of the relay, thereby being beneficial to quick arc extinction.

Drawings

For a better understanding of the invention, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present invention. In addition, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views. The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Wherein:

fig. 1 shows a schematic diagram of a relay concealing housing for improving arc extinguishing performance according to an embodiment of the present invention;

fig. 2 shows a second schematic structural diagram of a relay concealing housing for improving arc extinguishing performance according to the first embodiment of the present invention;

fig. 3 shows a schematic diagram of a relay concealing housing for improving arc extinguishing performance according to an embodiment of the present invention;

fig. 4 is a schematic diagram showing a structure of a relay concealing housing for improving arc extinguishing performance according to an embodiment of the present invention;

fig. 5 shows a schematic diagram of a relay concealing housing for improving arc extinguishing performance according to an embodiment of the present invention;

fig. 6 is a schematic diagram showing a structure of a relay concealing housing for improving arc extinguishing performance according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a relay concealing housing for improving arc extinguishing performance according to an embodiment of the present invention;

fig. 8 shows a schematic diagram eight of a relay concealing housing for improving arc extinguishing performance according to an embodiment of the present invention;

fig. 9 is a schematic structural view showing the direction of arc current and the direction of magnetic field of a permanent magnet in a relay for improving arc extinguishing performance according to the first embodiment of the present invention;

fig. 10 is a schematic structural view showing the direction of arc stress of a relay for improving arc extinguishing performance according to the first embodiment of the present invention;

fig. 11 is a schematic view showing a structure of a relay for improving arc extinguishing performance according to the first embodiment of the present invention, in which an arc is moved to an arc extinguishing chamber;

fig. 12 is a cross-sectional view showing a relay concealed housing for improving arc extinguishing performance according to the first embodiment of the present invention;

FIG. 13 shows a partial enlarged view of FIG. 12 at A;

fig. 14 is an exploded view of a relay for improving arc extinguishing performance according to the first embodiment of the present invention;

fig. 15 is a schematic structural view of a coil former in a relay for improving arc extinguishing performance according to a first embodiment of the present invention;

fig. 16 is a schematic view showing a first structure of a yoke, a coil bobbin and a static spring support in an assembled state in a relay for improving arc extinguishing performance according to the first embodiment of the present invention;

fig. 17 is a schematic diagram showing a second structure of a yoke, a coil bobbin and a static spring support in an assembled state in a relay for improving arc extinguishing performance according to the first embodiment of the present invention;

fig. 18 is a schematic diagram showing a structure of an arc extinguishing chamber of a relay for improving arc extinguishing performance according to the first embodiment of the present invention;

fig. 19 is a schematic diagram showing a second structure of an arc extinguishing chamber of a relay for improving arc extinguishing performance according to the first embodiment of the present invention;

fig. 20 shows a schematic structural diagram of a relay for improving arc extinguishing performance according to a second embodiment of the present invention;

fig. 21 shows a second schematic structural diagram of a relay for improving arc extinguishing performance according to a second embodiment of the present invention;

fig. 22 shows a third schematic structural diagram of a relay for improving arc extinguishing performance according to the second embodiment of the present invention;

fig. 23 is a schematic diagram showing a first configuration of a relay for improving arc extinguishing performance according to a third embodiment of the present invention;

fig. 24 shows a second schematic structural diagram of a relay for improving arc extinguishing performance according to a third embodiment of the present invention;

fig. 25 shows a third schematic structural view of a relay for improving arc extinguishing performance according to a third embodiment of the present invention.

Wherein reference numerals are as follows:

m, datum line;

1. a contact assembly; 2. a magnetic circuit assembly; 3. an arc extinguishing chamber; 4. a permanent magnet; 5. an arc isolation structure; 6. a base; 7. a housing; 9. arc extinguishing grid plates; 10. a static spring support;

11. a static reed; 111. a stationary contact;

12. a movable reed; 121. a movable contact;

21. a coil former; 211. a first flange; 2111. a clamping groove; 212. a second flange; 213. a through hole; 22. a coil; 23. a yoke; 231. a vertical portion; 232. a horizontal portion; 24. an armature; 25. an iron core;

51. a retaining wall; 511. a clamping protrusion; 512. a step; 52. a bending part; 53. an insulating part; 54. a blocking portion;

101. a slot.

Detailed Description

The technical solutions in the exemplary embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present invention. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, and it should be understood that various modifications and changes can be made to the example embodiments without departing from the scope of the invention.

In the description of the present invention, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present invention, it should be understood that the terms "upper", "lower", "inner", "outer", and the like in the exemplary embodiments of the present invention are described in terms of the drawings, and should not be construed as limiting the exemplary embodiments of the present invention. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.

The present embodiment provides a relay for improving arc extinguishing performance, as shown in fig. 1-3, the relay includes a contact assembly 1 and a magnetic circuit assembly 2, the contact assembly 1 includes a fixed reed 11 and a movable reed 12, the magnetic circuit assembly 2 includes a coil 22, and a magnetic field generated by the coil 22 can drive the movable reed 12 to contact or separate from the fixed reed 11. When the movable reed 12 and the static reed 11 are contacted, the movable reed 12 and the static reed 11 are connected with a load to form a passage, so that the load is communicated.

It will be appreciated that the movable spring 12 and the fixed spring 11 may be directly contacted or separated, and a movable contact 121 may be disposed on a side of the movable spring 12 facing the fixed spring 11, a fixed contact 111 may be disposed on a side of the fixed spring 11 facing the movable spring 12, the movable contact 121 and the fixed contact 111 may be contacted or separated from each other, the movable contact 121 and the fixed contact 111 may form a contact group, and the contact group may form a contact portion at least partially contacting the assembly 1.

Of course, the movable spring 12 and the movable contact 121 may be provided separately or may be an integrally formed structure, and the stationary spring 11 and the stationary contact 111 may be provided separately or may be an integrally formed structure. In addition, the specific contact form between the movable reed 12 and the fixed reed 11 is not limited in this embodiment, and it is within the scope of this embodiment as long as contact or separation between the movable reed 12 and the fixed reed 11 can be achieved.

The contact portion of the contact assembly 1 corresponds to the contact group, the number of the contact group is at least one, the contact group is not limited in this embodiment, two contact groups are taken as examples, and the number of the contact group can be adjusted according to actual production needs.

The moving direction of the movable reed 12 relative to the static reed 11 is defined as a first direction, the first direction is marked by D1, the arrangement direction of the two contact sets is a second direction, the second direction is marked by D2, the third direction is marked by D3, and the first direction, the second direction and the third direction are perpendicular to each other, wherein the first direction, the second direction and the third direction only represent space directions and have no substantial meaning.

When the movable contact spring 12 and the fixed contact spring 11 are separated, the contact between the fixed contact 111 and the movable contact 121 does not generate an arc due to the separation, and if the arc cannot be timely broken or extinguished, the arc can ablate the movable contact 121 or the fixed contact 111, and even the relay fails.

In order to solve this problem, the relay for improving arc extinguishing performance provided in the present embodiment includes, as shown in fig. 1 to 3, an arc isolating structure 5, the arc isolating structure 5 being disposed between a contact portion of the contact assembly 1 and the coil 22 for isolating an arc generated at the contact portion between the movable reed 12 and the static reed 11 when the movable reed 12 is separated from the static reed 11. Wherein an arc separation structure 5 is arranged at least partially around the coil 22 for increasing the arc stretch movement space.

The relay for improving arc extinguishing performance provided by the embodiment has the advantage that the arc isolation structure 5 is arranged between the coil 22 and the contact part of the contact assembly 1, and the arc isolation structure 5 plays a role in isolating an arc. The arc isolation structure 5 at least partially surrounds the coil 22, and the arc isolation structure 5 acts to protect the coil 22 to some extent, reducing the risk of arc ablation of the coil 22. Meanwhile, under the condition of not increasing the volume of the relay, the arc stretching moving space is increased, and quick arc extinction is facilitated.

In one embodiment, the arc isolation structure 5 is made of an insulating material. That is, the arc isolation structure 5 is not conductive and serves to insulate and isolate the arc.

Specifically, the arc isolation structure 5 is made of at least one of ceramic material, plastic material or gas generating material.

Wherein, separate arc structure 5 can adopt ceramic material to make alone, separates arc structure 5 and is solitary ceramic structure, improves the cooling effect of electric arc temperature. The arc isolation structure 5 can also be made of plastic materials, the production cost is low, and the plastic materials need to be high-temperature resistant and can bear the ablation of the electric arc in a short time.

The arc isolation structure 5 may also be made of a gas generating material, such as polyamide, nylon, or polymethyl methacrylate. Under the action of the electric arc, the gas generating material can generate a large amount of gas at high temperature, and the gas can play a role in protecting the surface of the arc isolation structure 5. Meanwhile, on one hand, gas generated by the gas generating material can blow and cool the electric arc, and further blow the electric arc, so that the temperature of the electric arc is reduced, the electric arc is extinguished as soon as possible, and the purpose of cooling the electric arc is achieved; on the other hand, the gas generated by the gas generating material can also flow and circulate, so that the arc is further elongated, and the effect of accelerating arc extinction is realized.

In one embodiment, as shown in fig. 4-6, the arc isolation structure 5 includes a retaining wall 51, the retaining wall 51 being disposed between the contact portion of the contact assembly 1 and the coil 22. A blocking wall 51 is provided between the contact portion of the contact assembly 1 and the coil 22, the blocking wall 51 being used to block an arc generated by the contact group.

The retaining wall 51 is a V-shaped structure, an opening end of the V-shaped structure is disposed towards the coil 22, and the V-shaped structure at least partially surrounds the outside of the coil 22.

The open end of the V-shaped structure is disposed toward the coil 22, and the V-shaped structure wraps the coil 22, increasing the protection range of the coil 22. The space on two sides of the V-shaped structure is relatively large, the space on two sides of the V-shaped structure is fully utilized, the arc drawing space can be further increased, meanwhile, the air around the contact set can be increased, and the integral ionization degree of the space can be reduced.

As shown in fig. 7 to 8, the distance between the center of the retaining wall 51 and the reference line, which is a line connecting the two contact sets, is smaller than the distance between the end of the retaining wall 51 and the reference line, which is indicated by M.

The portion between the center and the end of the retaining wall 51 and the reference line are not parallel, but have a certain angle, that is, the retaining wall 51 has a certain inclination angle relative to the reference line, the distance between the center of the retaining wall 51 and the reference line is smaller, the distance between the two ends of the retaining wall 51 and the reference line is larger, that is, the distance between the retaining wall 51 and the reference line is larger as the retaining wall 51 is far away from the contact group, the space between the contact assembly 1 and the retaining wall 51 is increased, so that the arc-extinguishing space is increased, and arc extinguishing is facilitated. Under the condition of not increasing the volume of the relay, the internal space of the relay is fully utilized, and the space utilization rate is improved. In addition, the air at two sides of the V-shaped structure can be fully utilized, the flow of the air is facilitated, the air around the contact set can be increased, and the overall ionization degree of the space can be reduced.

In one embodiment, as shown in fig. 7-8, the distance between the retaining wall 51 and the reference line gradually increases from the center of the retaining wall 51 to the end of the retaining wall 51.

Because the distance between the retaining wall 51 and the datum line is continuously changed step by step, the resistance of the gas flow on the arc blowing path is small, the rapid flow of the arc gas flow is facilitated, and the rapid arc extinction of the arc is facilitated.

In one embodiment, the retaining wall 51 is an arcuate structure from the center of the retaining wall 51 to the ends of the retaining wall 51.

Because the retaining wall 51 is obliquely arranged relative to the datum line, the retaining wall 51 is in an oblique arc structure, and the flow resistance of the gas on the path of the oblique arc structure is smaller, so that the arc more smoothly slides into the arc extinguishing space between the retaining wall 51 and the contact assembly 1, and the smoothness of arc movement is improved.

In one embodiment, as shown in fig. 7-8, the arc isolation structure 5 further includes a bending portion 52, the bending portion 52 is connected to an end of the retaining wall 51, and the retaining wall 51 and the bending portion 52 at least partially enclose the outside of the coil 22.

Since the bending portion 52 is connected to the end of the retaining wall 51 away from the contact assembly 1, the end of the retaining wall 51 is bent and extended backward in the third direction, and further surrounds the periphery of the coil 22. At this time, the retaining wall 51 of the arc isolation structure 5 is disposed on one side of the coil 22 along the third direction, which is close to the contact assembly 1, the retaining wall 51 can block the arc along the third direction, the bending portion 52 of the arc isolation structure 5 is disposed on one side of the coil 22 along the second direction, and the bending portion can block the arc along the second direction.

It can be understood that the number of the bending portions 52 may be two, the two bending portions 52 and the two retaining walls 51 are correspondingly arranged, the two bending portions 52 are respectively and correspondingly arranged at one sides of the two retaining walls 51 away from each other, the two bending portions 52 are respectively arranged at two sides of the coil 22 along the second direction, the two retaining walls 51 and the two bending portions 52 achieve three-surface surrounding of the coil 22, and the blocking effect of the electric arc and the protection effect of the coil 22 are further improved.

The bending part 52 further improves the insulation between the coil 22 and the contact set, and realizes high-low voltage electric isolation, so that the requirement of higher withstand voltage of customers can be met. However, the bending portion 52 is not necessarily provided, and whether the bending portion 52 is provided is not limited in this embodiment, and may be adjusted according to actual production requirements.

In one embodiment, as shown in fig. 6-8, the arc isolation structure 5 further includes an insulation portion 53, where the insulation portion 53 is disposed between the contact assembly 1 and the retaining wall 51, and the insulation portion 53 is disposed between the two contact sets.

The insulating portion 53 is disposed between the contact assembly 1 and the retaining wall 51, the insulating portion 53 is disposed along the third direction, and the insulating portion 53 can block the arc to some extent. The insulating part 53 is disposed between the two sets of contacts, and the creepage distance between the two sets of contacts can be increased by using the insulating part 53.

In one embodiment, as shown in fig. 6-8, the arc isolation structure 5 further includes a blocking portion 54, where the blocking portion 54 is connected between the bending portion 52 and the retaining wall 51, the coil 22 is electrically connected to the coil outlet, and the blocking portion 54 is used to block the arc from moving to the coil outlet.

The blocking part 54 is connected between the bending part 52 and the retaining wall 51, so that the strength of the whole part is enhanced, meanwhile, the blocking part 54 plays a role in blocking and isolating electric arcs, the insulating performance is improved, and high-low voltage isolation is realized.

In one embodiment, as shown in fig. 8, the relay further includes two arc extinguishing chambers 3 and a magnetic field assembly, the two arc extinguishing chambers 3 are respectively disposed corresponding to the two contact sets, and the arc extinguishing chambers 3 are disposed between the contact portion, the retaining wall 51 and the bending portion 52 of the contact assembly 1. The magnetic field assembly is arranged around the contact portion of the contact assembly 1 such that the magnetic field generated by the magnetic field assembly is able to transfer the arc to the arc chute 3, respectively.

It can be understood that the space enclosed between the contact portion of the contact assembly 1, the retaining wall 51 and the bent portion 52 is the arc extinguishing chamber 3. When the movable reed 12 and the static reed 11 are separated, an arc generated at the contact portion ablates around the contact group and heats the temperature of the gas around the contact group, so that the temperature around the contact group is increased, the gas pressure is increased, and the gas flows from a region with relatively high pressure to a region with relatively low pressure. The contact part of the contact assembly 1 and the arc extinguishing chamber 3 are correspondingly arranged, and the arc extinguishing chamber 3 provides a reserved space for gas flow, so that the gas around the contact part of the contact assembly 1 flows to the reserved position of the arc extinguishing chamber 3. Meanwhile, the electric arc moves towards the direction of the arc-extinguishing chamber 3 under the action of the magnetic field assembly, the electric arc stretches and moves to the arc-extinguishing chamber 3, the arc-extinguishing chamber 3 achieves the arc-extinguishing function, the electric arc is finally broken and can be extinguished as soon as possible, and the breaking capacity of the contact set is high, so that the safety of the relay is guaranteed.

It should be noted that the magnetic field assembly may include two permanent magnets 4, where the two permanent magnets 4 are disposed corresponding to the two arc extinguishing chambers 3, and the magnetic field assembly may further include one permanent magnet 4 and a magnetic conduction structure, where the magnetic conduction structure is a magnetic conduction member or a magnetic conduction frame, so that a magnetic field generated by one permanent magnet 4 may be disposed corresponding to the two arc extinguishing chambers 3 under the guiding action of the magnetic conduction structure.

In one embodiment, as shown in fig. 9-11, the contact surface between the movable contact 121 and the fixed contact 111 is perpendicular to the axial direction of the movable reed 12 opposite to the coil 22, so that the magnetic field generated by the magnetic field assembly can respectively move the electric arcs generated when the two contact sets are disconnected to the two arc extinguishing chambers 3.

For a set of contacts located on the left side in the second direction, assuming that current flows from the static spring 11 to the static contact 111 and finally to the movable contact 121, the current direction is denoted by I, the side of the permanent magnet 4 corresponding to the set of contacts, which is closer to the set of contacts, is the N-pole, the side of the permanent magnet 4, which is farther from the set of contacts, is the S-pole, and the magnetic field direction is denoted by B. Under the influence of the lorentz force and under the action of the magnetic field, the electric arc is blown from the contact set into the arc extinguishing chamber 3 corresponding to the contact set, and the stress direction of the electric arc is marked by F. For a group of contact sets positioned on the right side along the second direction, the directions of the current are opposite, so that the directions of the magnetic poles of the contact sets corresponding to the permanent magnets 4 can be oppositely set, and the magnetic field directions can be correspondingly adjusted, so that the arcs generated when the two contact sets are disconnected can be respectively correspondingly transferred into the two arc extinguishing chambers 3, and the effect of extinguishing the arcs is further achieved.

It will be appreciated that in this embodiment, two contact sets are taken as an example, if the contact forms are other forms, and similar processing is performed, the electric arc can be blown into the preset arc extinguishing chamber 3 only by correspondingly matching the polarity and the current direction of the permanent magnet 4, and the electric arc is influenced by the lorentz force under the action of the magnetic field.

In one embodiment, as shown in fig. 12 to 13, the magnetic circuit assembly 2 further includes a bobbin 21, the bobbin 21 being for winding the coil 22, and both ends of the bobbin 21 in the axial direction thereof being provided with two flanges, respectively, for limiting the coil 22.

Specifically, the coil 22 is wound on the bobbin 21. The two flanges are respectively a first flange 211 and a second flange 212, the first flange 211 and the second flange 212 are respectively arranged at two ends of the coil rack 21 along the first direction, the first flange 211 is positioned above the second flange 212, the first flange 211 can be called as an upper flange, the second flange 212 can be called as a lower flange, the first flange 211 and the second flange 212 play a role in limiting the coil 22, and the situation that the coil 22 is deviated from the position of the coil rack 21 is avoided.

Because the coil 22 is larger in size along the axial direction, the space between the first flange 211 and the second flange 212 of the coil frame 21 and the coil 22 can be used as a part of the arc extinguishing chamber 3, the space of the whole magnetic circuit part is fully utilized, and the space of the arc extinguishing chamber 3 can be maximized by utilizing the internal structure of the relay under the condition of not increasing the volume, thereby being beneficial to quick arc extinguishing. At this time, the arc extinguishing chamber 3 is disposed between the contact portion of the contact assembly 1, the retaining wall 51, the bent portion 52, the first and second flanges 211 and 212 of the bobbin 21, and the coil 22.

The bobbin 21 has a winding form, and also has a winding form or not. Whether or not the bobbin 21 has a winding shaft, the coil 22 is wound through the winding window. Two flanges are respectively arranged at two ends of the winding window along the axial direction of the winding window, and the two flanges improve the limit effect on the coil 22.

In one embodiment, as shown in fig. 12-13, one of the flange and the arc isolation structure 5 is provided with a clamping protrusion 511, and the other is provided with a clamping groove 2111, and the clamping protrusion 511 is clamped in the clamping groove 2111.

Specifically, the retaining wall 51 of the arc isolation structure 5 is provided with a clamping protrusion 511 corresponding to the flange, the flange is provided with a clamping groove 2111 corresponding to the clamping protrusion 511, the clamping protrusion 511 is clamped in the clamping groove 2111, the insertion structure between the retaining wall 51 and the flange is used for fixing, meanwhile, the creepage distance is increased, and the pressure resistance of the coil 22 is improved.

In one embodiment, the relay further comprises a static spring support 10, and the static spring 11 is inserted on the static spring support 10. Wherein, quiet spring support 10 and separate arc structure 5 are integrated into one piece structure.

It can be understood that the arc isolation structure 5 can be an independent structure, and can also be an integrated structure of the arc isolation structure 5 and the static spring support 10, at this time, the static spring support 10, the insulating portion 53, the retaining wall 51, the bending portion 52 and the blocking portion 54 are one part, so that the links of part assembly are reduced, the production time is saved, and the production efficiency is improved.

In one embodiment, the side of the static spring support 10 facing the arc extinguishing chamber 3 is also provided with a reinforcing rib.

Because the static spring support 10 needs to support the static spring 11, the static spring support 10 needs a certain structural strength, the reinforcing ribs are arranged on the static spring support 10, the reinforcing ribs play a role in structurally reinforcing the static spring support 10, and the supporting strength of the static spring support 10 to the static spring 11 is improved. Meanwhile, the reinforcing rib is arranged on one side of the static spring support 10 facing the arc extinguish chamber 3, which is equivalent to the inner side of the static spring support 10, so that the reinforcing rib is not exposed and hidden inside, and the miniaturization requirement is further met.

In one embodiment, the number of the reinforcing ribs is a plurality, the plurality of reinforcing ribs are arranged in parallel at intervals, the interval between two adjacent reinforcing ribs forms a guiding air passage, and the guiding air passage plays a role in guiding air flow so as to guide air around the contact part of the movable reed 12 and the static reed 11 to the arc extinguishing chamber 3, and speed of air circulation is accelerated.

In one embodiment, as shown in fig. 14, the relay further includes a yoke 23, an iron core 25 and an armature 24, the iron core 25 is disposed through the coil 22, the yoke 23 is disposed on a side of the coil 22 away from the contact assembly 1, the armature 24 is connected to the movable spring 12, and the iron core 25 is disposed corresponding to the armature 24.

Specifically, when the coil 22 is energized, the coil 22 generates a magnetic field, the iron core 25 attracts the armature 24, and the armature 24 drives the movable spring 12 to move downward along the first direction, so that the movable spring 12 contacts the contact portion of the fixed spring 11 or the movable contact 121 of the movable spring 12 contacts the fixed contact 111 of the fixed spring 11; when the coil 22 is disconnected, the magnetic field is removed, and the armature 24 moves upward in the first direction under the reaction force of the movable spring 12, so that the movable spring 12 is separated from the contact portion of the fixed spring 11 or the movable contact 121 of the movable spring 12 is separated from the fixed contact 111 of the fixed spring 11.

In one embodiment, as shown in fig. 14 to 17, the yoke 23 includes a horizontal portion 232 and a vertical portion 231, the vertical portion 231 is disposed at a side of the coil 22 away from the contact assembly 1, the vertical portion 231 is connected to the movable spring 12, the coil frame 21 is provided with a through hole 213, the stationary spring support 10 is provided with a slot 101 corresponding to the through hole 213, and the horizontal portion 232 passes through the through hole 213 and is clamped in the clamping groove 2111.

Wherein, the vertical portion 231 of the yoke 23 is arranged along the first direction, the horizontal portion 232 of the yoke 23 is arranged along the third direction, the vertical portion 231 and the horizontal portion 232 are mutually perpendicular and connected to form an L-shaped structure, and the vertical portion 231 is connected to the movable spring 12. The horizontal portion 232 is inserted into the slot 101 of the stationary spring support 10 after passing through the through hole 213 of the bobbin 21 to fix the yoke 23, the bobbin 21 and the stationary spring support 10 into an integral structure. Therefore, the magnetic circuit assembly 2 and the stationary spring support 10 are assembled based on the yoke 23, and the yoke 23 has the characteristics of being not easy to deform and shrink, so that the assembly accuracy of the magnetic circuit assembly 2 and the stationary spring support 10 can be improved.

In one embodiment, as shown in fig. 14, 18-19, the relay further comprises a base 6 and a housing 7 connected to each other, and the contact assembly 1 and the magnetic circuit assembly 2 are disposed in the base 6 and in the housing 7.

Specifically, one end of the housing 7 has an open end, and the open end of the housing 7 is disposed toward the base 6 and connected with the base 6, and an accommodating space is formed between the base 6 and the housing 7 for accommodating the contact assembly 1, the magnetic circuit assembly 2.

It should be noted that, the base 6 may be a separate structure, the base 6 and the coil frame 21 may be an integral structure, or the second flange 212 of the coil frame 21 extends along the second direction and the third direction to form the base 6, where the static spring support 10 and the yoke 23 are disposed on the second flange 212, and the second flange 212 serves as the base 6; the base 6 may also be integrally formed with the stationary spring support 10, or the bottom of the stationary spring support 10 in the first direction may extend in the third direction to form the base 6, and the yoke 23 may be disposed on the bottom extension of the stationary spring support 10, where the bottom extension of the stationary spring support 10 serves as the base 6. The specific form of the base 6 is not limited in this embodiment, and may be adjusted according to actual production conditions.

As shown in fig. 18 to 19, the arc extinguishing chamber 3 is provided between the contact portion of the contact assembly 1, the arc isolation structure 5, the coil 22, the yoke 23, the armature 24, the base 6, and the housing 7.

In other words, the length of the arc extinguishing chamber 3 in the third direction starts from the contact portion of the contact assembly 1 and ends up to the yoke 23 of the relay. The width of the arc chute 3 in the second direction starts from the arc isolation structure 5 to the inner side wall of the housing 7 in the second direction. The height of the arc chute 3 in the first direction starts from a first flange 211 of the coil former 21 to a second flange 212 of the coil former 21.

Example two

This embodiment is similar to the first embodiment, and differs only in the detailed structure of the retaining wall 51.

As shown in fig. 20 to 22, the relay for improving arc extinguishing performance provided in the present embodiment includes a plurality of steps 512 connected to each other from the center of the retaining wall 51 to the end of the retaining wall 51.

Specifically, the retaining wall 51 adopts a stepped structure, and a plurality of steps 512 connected to each other have a stepwise trend of a plurality of steps.

Example III

This embodiment is similar to the first embodiment, except that other details are added to the arc extinguishing chamber 3.

As shown in fig. 23 to 25, the relay for improving arc extinguishing performance according to the present embodiment further includes a plurality of arc extinguishing bars 9, and the plurality of arc extinguishing bars 9 are disposed in parallel and spaced apart and disposed in the arc extinguishing chamber 3.

Specifically, the plurality of arc extinguishing gate sheets 9 are arranged along the first direction; and/or a plurality of arc extinguishing gate sheets 9 are arranged along the second direction.

Specifically, since the first direction is the motion direction of the movable reed 12 relative to the static reed 11, the plurality of arc extinguishing bars 9 can be distributed longitudinally, and at this time, the arc extinguishing bars 9 are arranged in parallel with the plane in which the second direction and the third direction are located, so that the arc can be divided into a plurality of segments of arc interruption in the longitudinal direction, and the arc extinguishing effect is improved.

Because the second direction is the direction of arranging of two contact groups, a plurality of arc extinguishing bars 9 are arranged along the transverse direction, and the arc extinguishing bars 9 can be arranged in parallel along the plane where the first direction and the third direction are located, if the electric arc is parallel to each arc extinguishing bar 9, a wide electric arc can be divided into a plurality of narrow electric arcs, which is equivalent to reducing the ion gas concentration of each electric arc in intangible state, thus being beneficial to arc extinction.

It will be appreciated that the effect is different if the direction of arrangement of the arc chute sheets 9 is different. The arrangement direction of the plurality of arc extinguishing gate sheets 9 is not limited in this embodiment, so long as the breaking of the arc can be realized, which is within the protection scope of this embodiment.

It should be noted here that the relay shown in the drawings and described in the present specification is only one example employing the principle of the present invention. It will be clearly understood by those of ordinary skill in the art that the principles of the present invention are not limited to any details or any components of the devices shown in the drawings or described in the specification.

It should be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the specification. The invention is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications are intended to fall within the scope of the present invention. It should be understood that the invention disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present invention. The embodiments described in this specification illustrate the best mode known for carrying out the invention and will enable those skilled in the art to make and use the invention.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (15)

1. A relay for improving arc extinguishing performance, comprising:

the contact assembly comprises a movable reed and a static reed;

the magnetic circuit assembly comprises a coil, and a magnetic field generated by the coil can drive the contact or separation of the movable reed and the static reed;

the arc isolation structure is arranged between the contact part of the contact assembly and the coil and is used for isolating an arc generated at the contact part between the movable reed and the static reed when the movable reed and the static reed are separated;

wherein the arc isolation structure is disposed at least partially around the coil.

2. The relay for improving arc extinguishing performance according to claim 1, wherein the arc isolating structure comprises:

the retaining wall is arranged between the contact part of the contact assembly and the coil;

the retaining wall is of a V-shaped structure, the opening end of the V-shaped structure faces the coil, and the V-shaped structure at least partially surrounds the outside of the coil.

3. The relay for improving arc extinguishing performance according to claim 2, wherein a distance between a center of the retaining wall and a reference line is smaller than a distance between an end of the retaining wall and the reference line;

the movable contact is arranged on one side of the movable reed, which faces the movable reed, the fixed contact is arranged on one side of the movable reed, which faces the movable reed, the movable contact and the fixed contact are contacted or separated with each other to form a contact group, the contact group forms at least part of a contact part of the contact assembly, and the datum line is a connecting line between the two contact groups.

4. The relay for improving arc extinguishing performance according to claim 3, wherein the retaining wall and the reference line are gradually increased from the center of the retaining wall to the end of the retaining wall.

5. The relay for improving arc extinguishing performance according to claim 2, wherein the retaining wall has an arc-shaped structure from a center of the retaining wall to an end of the retaining wall; or alternatively, the first and second heat exchangers may be,

the retaining wall includes a plurality of interconnected steps from a center of the retaining wall to an end of the retaining wall.

6. The relay for improving arc extinguishing performance according to claim 3, wherein the arc isolating structure further comprises:

and the bending part is connected with the end part of the retaining wall, and the retaining wall and the bending part at least partially surround the outside of the coil.

7. The relay for improving arc extinguishing performance according to claim 6, wherein the arc isolating structure further comprises:

the blocking part is connected between the bending part and the retaining wall, the coil is electrically connected to the coil leading-out end, and the blocking part is used for blocking the electric arc from moving to the coil leading-out end.

8. The relay of claim 6, wherein the arc isolating structure further comprises an insulating portion disposed between the contact assembly and the retaining wall, the insulating portion disposed between two of the contact sets.

9. The relay for improving arc extinguishing performance according to claim 8, wherein the magnetic circuit assembly further comprises:

the coil rack is used for winding the coil, two ends of the coil rack along the axial direction of the coil rack are respectively provided with two flanges, and the flanges are used for limiting the coil;

one of the flange and the arc isolation structure is provided with a clamping protrusion, and the other is provided with a clamping groove, and the clamping protrusion is clamped in the clamping groove.

10. The relay for improving arc extinguishing performance according to claim 9, wherein the relay further comprises:

the two arc-extinguishing chambers are respectively and correspondingly arranged with the two contact sets, and are arranged among the contact part, the retaining wall, the bending part and the coil rack of the contact assembly;

a magnetic field assembly disposed around the contact portion of the contact assembly;

the contact surface between the movable contact and the fixed contact is perpendicular to the axial direction of the movable reed relative to the coil, and the magnetic field generated by the magnetic field assembly can respectively move the electric arcs generated when the two contact sets are disconnected to the two arc extinguishing chambers.

11. The relay for improving arc extinguishing performance according to claim 9, wherein the relay further comprises:

the static spring support is inserted on the static spring support;

wherein, quiet spring support with separate the arc structure and be integrated into one piece structure.

12. The relay for improving arc extinguishing performance according to claim 11, further comprising a yoke, wherein the yoke comprises a horizontal portion and a vertical portion which are connected and arranged in a mutually perpendicular manner, the vertical portion is arranged on one side of the coil away from the contact assembly, the vertical portion is connected with the movable reed, the coil rack is provided with a through hole, the static spring support is provided with a slot corresponding to the through hole, and the horizontal portion penetrates through the through hole and is clamped in the clamping slot.

13. The arc chute of claim 10 wherein the arc chute structure further comprises:

the arc extinguishing bars are arranged in parallel at intervals and are arranged in the arc extinguishing chamber;

wherein, arc extinguishing bars piece with kink integrated into one piece.

14. The relay for improving arc extinguishing performance according to any one of claims 1 to 13, wherein the arc isolating structure is made of an insulating material.

15. The arc chute of claim 14 wherein the arc chute is made of at least one of a ceramic material, a plastic material, or a gas generating material.