阅读说明：本技术 一种灭弧结构以及具有该灭弧结构的接触器 (Arc extinguishing structure and have contactor of this arc extinguishing structure ) 是由 刘磊 计新华 张�杰 肖海强 于 2021-01-25 设计创作，主要内容包括：本发明提供一种灭弧结构以及具有该灭弧结构的接触器,属于电气元件技术领域,其中,灭弧结构包括：基座,所述基座内具有多个触头容纳腔,两个触头容纳腔相对设置构成一容纳腔组,动触头的两端分别伸入每一个容纳腔组的两个触头容纳腔内,在所述触头容纳腔内分别可拆卸地设置有灭弧件,所述灭弧件位于动触头和静触头的接触点处；本发明的灭弧结构,在基座上每个触头容纳腔内,均单独设置灭弧件,通过该灭弧件可以提供相对较大的热交换面积,实现对灭弧室内部的冷却和尽快实现从金属弧到空气弧的过渡,以减少银触点的灭弧；并且该灭弧件为可拆卸地设置在基座上,在制造基座和灭弧件时,可单独进行生产,然后组装完成,便于制造。(The invention provides an arc extinguishing structure and a contactor with the same, belonging to the technical field of electrical elements, wherein the arc extinguishing structure comprises: the contact-type arc extinguishing device comprises a base, a movable contact, a plurality of contact accommodating cavities and a plurality of arc extinguishing members, wherein the base is internally provided with a plurality of contact accommodating cavities, the two contact accommodating cavities are oppositely arranged to form an accommodating cavity group, two ends of the movable contact respectively extend into the two contact accommodating cavities of each accommodating cavity group, the arc extinguishing members are respectively and detachably arranged in the contact accommodating cavities and are positioned at contact points of the movable contact and the fixed contact; according to the arc extinguishing structure, the arc extinguishing piece is independently arranged in each contact accommodating cavity on the base, and a relatively large heat exchange area can be provided through the arc extinguishing piece, so that the internal part of an arc extinguishing chamber is cooled, and the transition from a metal arc to an air arc is realized as soon as possible, so that the arc extinguishing of a silver contact is reduced; and this arc extinguishing spare is detachably set up on the base, when making base and arc extinguishing spare, can produce alone, then the equipment is accomplished, is convenient for make.)

1. An arc extinguishing structure, comprising: the device comprises a base (1), wherein a plurality of contact accommodating cavities (7) which are arranged in parallel are arranged in the base (1), and a moving contact (3) and a static contact (2) are suitable to be arranged in the contact accommodating cavities (7);

the two contact accommodating cavities (7) are oppositely arranged to form an accommodating cavity group, two ends of the moving contact (3) respectively extend into the two contact accommodating cavities (7) of each accommodating cavity group, and at least one fixed contact (2) used for being matched with the moving contact (3) is correspondingly arranged in each contact accommodating cavity (7);

at least one arc extinguishing part (6) is detachably arranged in the contact accommodating cavity (7), and the arc extinguishing part (6) is located at the contact point of the moving contact (3) and the static contact (2).

2. An arc extinguishing structure according to claim 1, characterized in that the base (1) has, in the contact receiving cavity (7), a clamping groove (8) for clamping the arc extinguishing member (6); two side edges of the arc extinguishing piece (6) are respectively clamped in the clamping groove (8).

3. An arc extinguishing structure according to claim 1 or 2, characterized in that the base (1) has, in the contact receiving chamber (7), a slot (9) for inserting the arc extinguishing member (6); the top end of the arc extinguishing piece (6) is inserted into the slot (9).

4. An arc extinguishing structure according to claim 3, characterized in that the top end of the arc extinguishing member (6) is provided with two insertion plates (10) extending upwards, a space is arranged between the two insertion plates (10), and the two insertion plates (10) are respectively inserted into the corresponding insertion grooves (9) on the base (1).

5. An arc-extinguishing structure according to claim 4, characterized in that a reinforcing rib (11) is connected between the two insert plates (10) of the arc-extinguishing member (6).

6. An arc extinguishing structure according to claim 3, characterized in that the arc extinguishing member (6) has at least one extending rib extending in the transverse direction, and the extending end of the extending rib is a free end.

7. An arc-extinguishing structure according to claim 4, characterized in that the arc-extinguishing member (6) is provided with at least one extension plate (12) on each of the two insert plates (10); the extension plate (12) extends along the transverse direction, and the extension end of the extension plate (12) is a free end.

8. An arc extinguishing structure according to claim 6 or 7, characterized in that the base (1) has an operating opening (13) at a position corresponding to the extension plate (12) of the arc extinguishing member (6); the operation opening (13) is provided with a groove (14) for limiting the up-and-down displacement of the extension plate (12).

9. An arc extinguishing structure according to any one of claims 4-7, characterized in that the stationary contact (2) is connected to the base (1) by means of a plug-in connection, and the section of the stationary contact (2) close to the contact has an upward bend (15), and the bend (15) and the side of the arc extinguishing member (6) together form an arc extinguishing chamber.

10. A contactor, comprising: an arc extinguishing structure according to any of claims 1-9, further comprising: the plug core (5) is inserted in the base (1) in a sliding mode, a moving contact (3) is elastically arranged on the plug core (5) through an elastic piece (4), two ends of the moving contact (3) respectively extend into a contact accommodating cavity (7) of the base (1), a static contact (2) is arranged in the contact accommodating cavity (7), and the static contact (2) and the moving contact (3) are in a normally closed state under the action of the elastic piece (4).

Technical Field

The invention relates to the technical field of electrical elements, in particular to an arc extinguishing structure and a contactor with the arc extinguishing structure.

Background

Contactor, broadly refers to: in industrial electricity, a coil is used for flowing current to generate a magnetic field, so that a contact is closed, and an electric appliance for controlling a load is achieved. The working principle of the contactor is as follows: when the coil of the contactor is electrified, the coil current can generate a magnetic field, the generated magnetic field enables the static iron core to generate electromagnetic attraction to attract the movable iron core and drives the movable contact of the contactor to move, the normally closed contact is opened, the normally open contact is closed, and the normally closed contact and the normally open contact are linked. When the coil is powered off, the electromagnetic attraction disappears, the armature is released under the action of the release spring, the contact is restored, the normally open contact is disconnected, and the normally closed contact is closed.

At present, the common contactor products are mostly three normally open contactors, and the normally closed products are mostly 2 normally closed 2 normally open contactors, and have no related three normally closed energy-saving products. For a load electrified for a long time, the three normally open contactors do not have an energy-saving effect because the coil needs to be electrified for a long time, and the temperature rise is relatively high. For a 2 normally-open 2-normally-closed contactor, the normally-closed contactor and the normally-open contactor only have 2 phases, and the capacity of switching on and off a three-phase motor is not available.

In addition, at the contact point of the contactor, when the moving contact and the fixed contact are switched on or off, an arc is generated. Because the contact of contactor all generally all sets up a plurality ofly side by side, this leads to not being convenient for install arc control device additional in contact department, and the arc extinguishing that leads to contact silver contact easily takes place the back.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to overcome the defect that it is inconvenient to install an arc extinguishing device at a contact of a contactor in the prior art, so as to provide an arc extinguishing structure and a contactor having the arc extinguishing structure.

In order to solve the above technical problem, the present invention provides an arc extinguishing structure, including: the contact device comprises a base, a plurality of contact accommodating cavities and a plurality of contact connecting pieces, wherein the base is internally provided with a plurality of contact accommodating cavities which are arranged in parallel, and a moving contact and a static contact are arranged in the contact accommodating cavities;

the two contact accommodating cavities are oppositely arranged to form an accommodating cavity group, two ends of the moving contact respectively extend into the two contact accommodating cavities of each accommodating cavity group, and at least one fixed contact matched with the moving contact is correspondingly arranged in each contact accommodating cavity;

at least one arc extinguishing piece is detachably arranged in the contact accommodating cavity respectively and is positioned at the contact point of the moving contact and the static contact.

Optionally, the contact accommodating cavity of the base is provided with a clamping groove for clamping the arc extinguishing piece; two side edges of the arc extinguishing piece are respectively clamped in the clamping grooves.

Optionally, the contact accommodating cavity of the base is provided with a slot for inserting the arc extinguishing piece; the top end of the arc extinguishing piece is inserted into the slot.

Optionally, two insertion plates extending upwards are arranged at the top end of the arc extinguishing part, a gap is formed between the two insertion plates, and the two insertion plates are respectively inserted into corresponding insertion grooves in the base.

Optionally, a reinforcing rib is connected between the two insert plates of the arc extinguishing member.

Optionally, the arc extinguishing member is provided with at least one extending rib extending along the transverse direction, and the extending end of the extending rib is a free end.

Optionally, at least one extension plate is respectively arranged on the two insert plates on the arc extinguishing member; the extension plate extends along the transverse direction, and the extension end of the extension plate is a free end.

Optionally, the base is provided with an operation opening at a position corresponding to the extension plate of the arc extinguishing member; the operation opening is provided with a groove for limiting the up-and-down displacement of the extension plate.

Optionally, the fixed contact is connected to the base in an inserting manner, an upward bend is formed on a section of the fixed contact, which is close to the contact, and the bend and a side edge of the arc extinguishing member together form an arc extinguishing chamber.

The present invention also provides a contactor comprising: the arc extinguishing structure of any one of the above aspects, further comprising: the plug core is inserted in the base in a sliding mode, the moving contact is elastically arranged on the plug core through the elastic piece, two ends of the moving contact respectively extend into the contact accommodating cavity of the base, the fixed contact is arranged in the contact accommodating cavity, and the fixed contact and the moving contact are in a normally closed state under the action of the elastic piece.

The technical scheme of the invention has the following advantages:

1. according to the arc extinguishing structure provided by the invention, each contact accommodating cavity on the base is independently provided with the arc extinguishing part, and the arc extinguishing part can provide a relatively large heat exchange area, so that the internal part of the arc extinguishing chamber is cooled, and the transition from a metal arc to an air arc is realized as soon as possible, so that the arc extinguishing of a silver contact is reduced; and this arc extinguishing spare is detachably set up on the base, when making base and arc extinguishing spare, can produce alone, then the equipment is accomplished, is convenient for make.

2. According to the arc extinguishing structure provided by the invention, the arc extinguishing piece is detachably connected to the base through the matching of clamping and inserting, so that the arc extinguishing piece is fixed in the base, and the position change of the arc extinguishing piece in transportation or daily use is avoided.

3. According to the arc extinguishing structure provided by the invention, the reinforcing ribs connected on the inserting plate have the effects of preventing the inserting plate on the arc extinguishing part from deforming due to severe temperature change during arc extinguishing, and preventing the arc extinguishing chamber from deforming and the arc extinguishing space from being reduced due to the deformation of the arc extinguishing part, so that the arc extinguishing structure is not beneficial to product use.

4. According to the arc extinguishing structure provided by the invention, the extending ribs extending transversely are arranged on the arc extinguishing part, after the arc extinguishing part is arranged on the base, the extending ribs are bent into the grooves of the operation opening of the base through operation of the extending ribs, the arc extinguishing part can be positioned in the vertical direction through the extending ribs, and then the arc extinguishing part can be stably arranged on the base through matching with the clamping groove and the inserting groove of the base.

5. The contactor according to the present invention has the advantages described above because it has the arc extinguishing structure according to any one of the above aspects.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a perspective view provided in one implementation of a contactor of an embodiment of the invention.

Fig. 2 is an exploded view of a partial structure of the interior of the contactor of fig. 1.

Fig. 3 is a schematic view of hiding a fixed contact based on fig. 1.

Fig. 4 is a schematic view of the inner part of the contactor shown in fig. 1, which is cut away from the middle.

Fig. 5 is an exploded view of the area a in fig. 4.

Fig. 6 is a schematic view of the arc extinguishing member and the stationary contact.

Fig. 7 is an exploded view of fig. 6.

Fig. 8 is an arc extinguishing schematic diagram of an arc extinguishing structure.

Description of reference numerals:

1. a base; 2. static contact; 3. a moving contact; 4. an elastic member; 5. inserting a core; 6. an arc extinguishing member; 7. a contact receiving cavity; 8. a card slot; 9. a slot; 10. inserting plates; 11. reinforcing ribs; 12. an extension plate; 13. an operation port; 14. a groove; 15. bending; 16. and inserting the groove.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The present embodiment provides a specific implementation of a contactor, as shown in fig. 1 and fig. 2, including: the device comprises a base 1, wherein a static contact 2 and a movable contact 3 are arranged in the base 1; specifically, the static contact 2 is connected to the base 1 through an inserting connection, the moving contact 3 is movably connected to the inserting core 5 through the elastic member 4, the inserting core 5 is slidably inserted into the base 1, and the inserting core 5 slides in the base 1 through the driving of the coil magnetic field, so that the opening and closing operation is performed. In addition, the static contact 2 and the moving contact 3 are in a normally closed state under the action of the elastic element 4: when the coil is not electrified, the inserting core 5 is jacked up by the spring, the movable contact 3 is tightly contacted with the static contact 2 to generate a passage, and the movable contact 3 has over travel under the action of the elastic element 4, so that contact pressure is generated to be beneficial to current connection. At this time, the contactor coil is in a non-energized state, so that an energy-saving effect can be achieved. From the thermal balance, the coil does not generate heat at the moment, only the main loop generates heat, and the temperature rise can be obviously reduced as long as the contact resistance of the coil is ensured within a reasonable range, so that the sectional areas of the movable contact plate and the static contact plate can be reduced, and the copper consumption is reduced.

As shown in fig. 2, an arc extinguishing structure is further disposed in the base 1, and arcs generated between the static contact 2 and the moving contact 3 are extinguished by the arc extinguishing structure. The arc extinguishing structure includes: the arc extinguishing part 6, the static contact 2 matched with the arc extinguishing part 6 and the contact accommodating cavity 7 on the base 1. The base 1 is internally provided with a plurality of contact accommodating cavities 7 which are arranged in parallel, and a moving contact 3 and a static contact 2 are arranged in the contact accommodating cavities 7; the two contact accommodating cavities 7 are oppositely arranged to form an accommodating cavity group, two ends of the movable contact 3 respectively extend into the two contact accommodating cavities 7 of each accommodating cavity group, and a fixed contact 2 used for being matched with the movable contact 3 is correspondingly arranged in each contact accommodating cavity 7; an independent arc extinguishing member 6 is detachably arranged in each contact accommodating cavity 7, the arc extinguishing member 6 is located at the contact point of the moving contact 3 and the static contact 2, and the arc extinguishing member 6 is used for extinguishing arcs generated between the moving contact 3 and the static contact 2. In a preferred embodiment, one arc extinguishing member 6 is of an integral structure, and one arc extinguishing member 6 may be of a plurality of separate combined structures.

As shown in fig. 3, the static contact 2 is connected to the base 1 by plugging, and an interference fit is formed between the contact plate of the static contact 2 and the insertion groove 16 of the base 1, so as to ensure that the static contact 2 is stably connected to the base 1.

As shown in fig. 4 and 5, a clamping groove 8 for clamping the arc extinguishing member 6 is formed in the contact accommodating cavity 7 of the base 1, and two side edges of the arc extinguishing member 6 are respectively clamped in the clamping groove 8. In the contact accommodating cavity 7 of the base 1, a slot 9 for inserting the arc extinguishing member 6 is further provided, and the top end of the arc extinguishing member 6 is inserted into the slot 9. The arc extinguishing member 6 and the base 1 are in interference fit, so that the arc extinguishing member 6 is stably connected to the base 1. In addition, as an alternative embodiment, a plurality of fixed contacts 2 may be disposed at intervals up and down in the contact accommodating cavity 7 of the base 1, so as to implement connection and disconnection of a plurality of circuits.

As shown in fig. 6 and 7, the arc extinguishing member 6 has two insertion plates 10 extending upward at the top end thereof, and the two insertion plates 10 are spaced apart from each other and are inserted into corresponding insertion slots 9 of the base 1 through the two insertion plates 10. Two of arc extinguishing piece 6 be connected with strengthening rib 11 between the picture peg 10 for when preventing the arc extinguishing, the violent transform of temperature causes picture peg 10 on the arc extinguishing piece 6 to warp, and arc extinguishing piece 6 warp and causes the explosion chamber to warp and the arc extinguishing space diminishes, is unfavorable for the use of product. Two extension plates 12 are respectively arranged on the two inserting plates 10 on the arc-extinguishing part 6, the two extension plates 12 extend towards opposite directions along the transverse direction, the extension ends of the extension plates 12 are free ends, and when the arc-extinguishing part 6 is assembled, the extension plates 12 are bent to fix the arc-extinguishing part 6 on the base 1.

As shown in fig. 1, the base 1 has an operation opening 13 at a position corresponding to the extension plate 12 of the arc extinguishing member 6, and the operation opening 13 has a groove 14 for limiting the vertical displacement of the extension plate 12. After installing arc control 6 on base 1, through this extension muscle of operation, make in the recess 14 of extension muscle bending to the operation mouth 13 of base 1, the accessible extends the muscle and fixes a position the upper and lower direction of arc control 6, then cooperates draw-in groove 8 and slot 9 of base 1, can be firm install arc control 6 on base 1.

In addition, as an alternative embodiment, one or more of the extending ribs may be provided extending in the transverse direction, and the extending ribs serve to better lock the arc-extinguishing member 6 to the base 1.

As shown in fig. 7, the section of the stationary contact 2 close to the contact has an upward bend 15, and the bend 15 and the side edge of the arc extinguishing member 6 together form an arc extinguishing chamber, so as to improve the arc extinguishing effect.

Principle of operation

As shown in fig. 8, the transverse plate of the arc extinguishing member 6 is located in the arc generating area between the movable contact 3 and the stationary contact 2, when the arc expands due to the high temperature generated by the arc itself and generates an outward blowing force, the arc will contact the arc extinguishing member 6 soon after generating (the moving direction is as shown by the arrow in 8), when the arc contacts, the arc will be separated and cooled on the arc extinguishing member 6 because the arc extinguishing member 6 is an iron member, the specific heat capacity is large, and the arc will be extinguished when the current crosses zero. The cover plate and the side plate of the arc extinguishing member 6 are both positioned in the arc extinguishing space, and high-temperature gas generated by electric arc and metal vapor generated during metal arc in the initial stage of electric arc can provide relatively large heat exchange area through the arc extinguishing member 6, so that the cooling of the inside of the arc extinguishing chamber and the transition from the metal arc to the air arc as soon as possible are realized, and the consumption of silver contacts is reduced. And preventing the arc from re-striking after moving out of the contact area, and from re-igniting after the current crosses zero when the temperature is high.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.