Contact piece and arc striking structure

Abstract

The utility model provides a contact piece and an arc striking structure, and belongs to the technical field of contact pieces, and the contact piece comprises a contact part which is used for being in contact with other contact pieces to form electric connection, and the contact part is provided with a rotating contact track area or a moving contact track area; the arc striking part is located at the same end of the contact piece, the arc striking part is arranged far away from the contact part, and at least part of the arc striking part is located outside the outer contour of the rotating contact track area or the moving contact track area; according to the utility model, a special contact piece structure is adopted, so that the arc striking part is closer to an arc extinguishing structure, the arc striking effect is enhanced, the arc extinguishing performance of equipment is improved, the electric arc is far away from the contact part, the loss of the contact is reduced, and the service life of the product is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of contact pieces, and specifically to a contact piece and an arc-starting structure. Background Art

[0002] Common electrical equipment in power systems include circuit breakers and disconnectors, most of which are used to control and protect power grids. These devices contain moving contacts and stationary contacts, and can connect or disconnect the circuit by opening and closing the moving contacts and stationary contacts. When the moving contact is separated from the stationary contact, an arc will be generated. The arc is a high-temperature plasma caused by the ionization of air when the electrical contact points are separated. It can conduct current between the two contacts, and the temperature of the arc is extremely high. If it is not extinguished in time, it will damage the equipment and cause accidents.

[0003] In the prior art, for example, a patent with the publication number CN220456302U discloses a contact system of a rotary disconnector, including a moving contact and a stationary contact, wherein the stationary contact is arranged relative to the moving contact, and the moving contact and the stationary contact form a connection / disconnection coordination, but the arc-starting effect of the moving contact and the stationary contact is general, and it is difficult to quickly introduce the arc generated during disconnection into the arc extinguishing chamber and extinguish it. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a contact piece and an arc striking structure.

[0005] The technical solution adopted by the utility model is as follows: In the first aspect, the present application provides a touch sheet, comprising:

[0006] A contact portion, the contact portion is used to contact with other contact pieces to form an electrical connection, and has a rotating contact track area or a moving contact track area in the contact;

[0007] And an arc-starting portion located at the same end of the contact piece, wherein the arc-starting portion is arranged away from the contact portion and at least partially located outside the outer contour of the rotating contact track area or the moving contact track area.

[0008] In some embodiments, the arc-starting portion is provided with a main arc-starting angle having an arc-starting tip, and at least the tip portion of the main arc-starting angle is located outside the outer contour of the rotating contact track area or the moving contact track area.

[0009] In some embodiments, the arc-starting portion is further provided with an auxiliary arc-starting angle having an arc-starting tip, and the main arc-starting angle and the auxiliary arc-starting angle are both arranged away from the contact portion.

[0010] In some embodiments, the transition edge from the contact portion to the main arc starting angle is composed of a plurality of continuous tangent circular arcs.

[0011] In some embodiments, it also includes a contact end arranged along the contact portion, wherein the contact end is composed of two inclined surfaces with opposite slopes and are close to each other on the side away from the arc-starting portion, and the length of the contact end is not less than the length of the contact portion.

[0012] In a second aspect, an arc striking structure includes a moving contact and a stationary contact, and the moving contact and / or the stationary contact adopts the contact piece.

[0013] In some embodiments, an arc extinguishing chamber is further included, and the arc striking portion at least partially extends into the arc extinguishing chamber.

[0014] In some embodiments, the moving contact adopts the contact piece, the contact portion is a moving contact portion arranged on the moving contact, the moving contact portion rotates around the rotation center of the moving contact to form the rotating contact track area, the static contact is at least partially located in the rotating contact track area, and the arc striking portion is at least partially located outside the outer contour of the rotating contact track area.

[0015] In some embodiments, the rotating contact track area overlaps with the axial orthographic projection area of ​​the arc extinguishing chamber along the rotating axis of the moving contact.

[0016] In some embodiments, the static contact is arranged at one end of the arc extinguishing chamber, and an arc-striking piece is arranged at the other end of the arc extinguishing chamber, the moving contact portion rotates between the static contact and the arc-striking piece, and the end of the arc-striking piece facing the moving contact is located in the rotating contact track area.

[0017] The beneficial effects of the utility model are as follows: in the utility model, the arc-striking portion is arranged away from the contact portion, and at least part of it is located outside the outer contour of the rotating contact track area or the moving contact track area, which can make the arc-striking portion closer to the arc extinguishing structure, enhance the arc-striking effect, and improve the arc extinguishing performance of the equipment. At the same time, it makes the arc away from the contact portion, reduces the loss of the contact, and extends the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0019] Figure 1 A partial schematic diagram of the first embodiment Figure 1 ;

[0020] Figure 2 A schematic diagram of the contact piece and the rotation contact track area in the first embodiment;

[0021] Figure 3 A schematic diagram of a touch sheet and a moving contact track area in Embodiment 1;

[0022] Figure 4 A partial schematic diagram of the first embodiment Figure 2 ;

[0023] Figure 5 It is a schematic diagram of the arc striking structure in the second embodiment;

[0024] Figure 6 Schematic diagram of the rotary isolating switch in the second embodiment Figure 1 ;

[0025] Figure 7 Schematic diagram of the rotary isolating switch in the second embodiment Figure 2 . DETAILED DESCRIPTION

[0026] The following description provides specific application scenarios and requirements of this specification, with the purpose of enabling those skilled in the art to make and use the contents of this specification. Various local modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but to the widest scope consistent with the claims.

[0027] In the description of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "transverse", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0028] Secondly, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components and should not be understood as limitations on the embodiments of the present application.

[0029] In addition, the terms "installed", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components.

[0030] For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] Regarding the drawings of the present application, it should be clearly understood that the drawings are for illustration and description purposes only and are not intended to limit the scope of the present specification. It should also be understood that the drawings are not drawn to scale.

[0032] Embodiment 1:

[0033] The contact-type moving contacts and stationary contacts commonly used in the prior art generally have the disadvantage of insufficient arc-striking effect. A contact provided in this embodiment replaces the moving contacts and / or stationary contacts in most electrical equipment, such as circuit breakers, disconnectors, etc.

[0034] like Figures 1 to 4 As shown, this embodiment provides a contact sheet, including:

[0035] The contact portion 10 is used to contact with other contact pieces to form an electrical connection, that is, the moving contact and the static contact in conventional electrical equipment form an electrical connection, and the contact has a rotating contact track area 100 or a moving contact track area 101; usually the moving contact and the static contact form an electrical connection by the moving contact moving contact and the static contact, wherein the moving contact movement is generally rotation or translation, and in this process, there will be a relative motion track area, the rotating contact track area 100, that is, a motion track area formed by the contact portion 10 when the moving contact is opened and closed with the static contact by rotation, and the moving contact track area 101, that is, a motion track area formed by the contact portion 10 when the moving contact is opened and closed with the static contact by movement. It should be understood that the moving contact and / or the static contact adopts the contact piece structure, and at the same time, the motion track area is affected by the movement range of the moving contact in the actual product. Of course, the motion track area is not a real structure.

[0036] And the arc-starting portion 11 located at the same end of the contact piece, it should be understood that the number of contact portions 10 and arc-starting portions 11 on different contact pieces may be different, the arc-starting portion 11 is arranged away from the contact portion 10, so that the arc is away from the contact portion 10, and at least part of it is located outside the outer contour of the rotating contact track area 100 or the moving contact track area 101, such as Figure 2 and Figure 3As shown, it should be understood that, for example, the rotating contact track area 100 is a circular ring, and there are an inner ring and an outer ring. At this time, the arc striking part 11 should extend out of the outer ring. When it is set in the electrical equipment, the arc striking part can be closer to the arc extinguishing structure, wherein the arc extinguishing structure is an arc extinguishing chamber, an arc extinguishing sheet, an arc striking channel, etc. Specifically, for example, when the moving contact adopts the structure of the contact sheet, the opening action of the moving contact relative to the static contact will produce an arc, and the arc striking part 11 can be closer to the arc extinguishing chamber, thereby enhancing the arc striking effect and improving the arc extinguishing performance of the equipment. At the same time, the arc is kept away from the contact part, the loss of the contact is reduced, and the service life of the product is extended.

[0037] Furthermore, the arc striking portion 11 is provided with a main arc striking angle 12 having an arc striking tip, which can more easily concentrate the arc, thereby quickly leading the arc out of the arc striking tip. At least the tip portion of the main arc striking angle 12 is located outside the outer contour of the rotating contact track area 100 or the moving contact track area 101, so that the arc striking tip is closer to arc extinguishing structures such as the arc extinguishing chamber, thereby quickly leading the arc into it and extinguishing it.

[0038] Furthermore, the arc-striking portion 11 is also provided with an auxiliary arc-striking angle 13 having an arc-striking tip. The main arc-striking angle 12 and the auxiliary arc-striking angle 13 are both arranged away from the contact portion 10. The auxiliary arc-striking angle 13 can assist and share the arc-striking work, and at the same time, after the main arc-striking angle 12 is worn out due to long-term use, it can continue to maintain a good arc-striking effect.

[0039] like Figure 1 and Figure 4 As shown, the transition edge 14 from the contact portion 10 to the main arc-starting angle 12 is composed of a plurality of continuous tangent arcs, which can also be understood as the contact piece is provided with a thickness end face at one end of the contact portion 10 and the main arc-starting angle 12, and a smooth arc-starting surface 140 is provided from the contact portion 10 to the main arc-starting angle 12, that is, there is no obvious angle, so that the arc generated by the contact portion 10 can be quickly guided to the main arc-starting angle 12 along the arc-starting surface 140. In this embodiment, the transition edge 14 is composed of three continuous tangent arcs, and the arc-starting surface 140 is composed of three continuous tangent arc surfaces.

[0040] like Figure 4 As shown, it also includes a contact end arranged along the contact portion 10, and the contact end is composed of two inclined surfaces 15 with opposite slopes and are close to each other on the side away from the arc-starting portion 11, thereby forming a knife-shaped contact end. The length of the contact end is not less than the length of the contact portion 10, and it can adapt to more contact pieces. For example, when the moving contact adopts the present contact piece structure, it is generally used in conjunction with a clamp-shaped static contact, so that the contact portion 10 is easier to be transferred into the static contact to form a stable and reliable electrical connection.

[0041] Embodiment 2:

[0042] like Figures 5 to 7 As shown, in this embodiment, a rotary isolating switch is taken as an example, the rotary isolating switch includes an arc striking structure, the arc striking structure includes a moving contact 20 and a stationary contact 21, the moving contact 20 and / or the stationary contact 21 adopt the contact piece described in the first embodiment. In this embodiment, as Figure 5 As shown, the moving contact 20 adopts the contact piece described in Example 1, and the moving contact portion 201 on the moving contact 20 is equivalent to the contact portion 10. The moving contact portion 201 rotates around the rotation center of the moving contact 20 to form the rotating contact track area 100, and the static contact 21 is at least partially located in the rotating contact track area 100. The arc striking portion 11 is at least partially located outside the outer contour of the rotating contact track area 100. At the same time, it also includes an arc extinguishing chamber 3, and the arc striking portion 11 at least partially extends into the arc extinguishing chamber 3. Preferably, the main arc striking angle 12 and the auxiliary arc striking angle 13 both extend into the arc extinguishing chamber 3, so that the arc is quickly introduced into the arc extinguishing chamber 3 for extinguishing, thereby improving the breaking performance of the product.

[0043] Furthermore, the rotating contact track area 100 overlaps with the axial projection area of ​​the arc extinguishing chamber 3 along the rotating axis of the moving contact 20, preferably completely overlaps, so that the moving contact 20 and the static contact 21 can be directly opened and closed in the arc extinguishing chamber 3, and the arc striking part 11 is also closer to the arc extinguishing grid, so that the arc extinguishing efficiency is greatly improved.

[0044] Furthermore, the static contact 21 is arranged at one end of the arc extinguishing chamber 3, and an arc-striking piece 4 is arranged at the other end of the arc extinguishing chamber 3, the moving contact portion 201 rotates between the static contact 21 and the arc-striking piece 4, and the end of the arc-striking piece 4 facing the moving contact 20 is located in the rotating contact track area 100, ensuring that the main arc-striking angle 12 and the auxiliary arc-striking angle 13 both extend into the arc extinguishing chamber 3, and can prevent the arc from flying out of the arc extinguishing chamber 3.

[0045] like Figure 6 and Figure 7 As shown, the rotary disconnector also includes a housing 7 and a rotating frame 8 rotatably arranged on the housing 7, the moving contact 20 is arranged on the rotating frame 8, and the moving contact part 201 is arranged at both ends of the moving contact 20, the static contact 21 and the arc extinguishing chamber 3 are both two, that is, there are double breaks when the switch is opened, thereby improving the breaking performance of the switch, and the arc extinguishing chamber 3 includes a first arc extinguishing spacer 31, a second arc extinguishing spacer 32 and two arc extinguishing pieces 33, a first arc extinguishing cavity 301 is formed between the first arc extinguishing spacer 31 and the corresponding static contact 21, a second arc extinguishing cavity 302 is formed between the first arc extinguishing spacer 31 and the second arc extinguishing spacer 32, and a third arc extinguishing cavity 303 is formed between the second arc extinguishing spacer 32 and the arc striking piece 6, and the arc can be cooled step by step by arranging the first, second and third arc extinguishing cavities.

[0046] A plurality of arc extinguishing grids 34 are disposed in the first arc extinguishing chamber 301 , the second arc extinguishing chamber 302 and the third arc extinguishing chamber 303 to enhance the arc extinguishing effect and accelerate the arc extinguishing by cutting and cooling the arc.

[0047] The two arc-isolating plates 33 are arranged on the upper and lower sides of the moving contact 1 and form an arc-drawing cavity 304. The arc-drawing cavity 304 is connected to each arc-extinguishing cavity. The arc-drawing cavity 304 helps the arc to be elongated and cooled before entering the arc-extinguishing cavity, thereby reducing the temperature and kinetic energy of the arc and increasing the arc-extinguishing speed.

[0048] In summary, after reading this detailed disclosure, it will be apparent to those skilled in the art that the foregoing detailed disclosure may be presented only by way of example and may not be limiting. Although not explicitly stated herein, it will be appreciated by those skilled in the art that the present application requires various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be proposed by the present application and are within the spirit and scope of the exemplary embodiments of the present application.

[0049] In addition, it should be understood that in the foregoing description of the embodiments of the present application, in order to help understand a feature and for the purpose of simplifying the present application, the present application combines various features in a single embodiment, drawing or its description. However, this does not mean that the combination of these features is necessary. When reading the present application, it is entirely possible for a person skilled in the art to mark out a part of the devices as a separate embodiment. In other words, the embodiments in the present application can also be understood as the integration of multiple secondary embodiments. This is also true when the content of each secondary embodiment is less than all the features of a single aforementioned disclosed embodiment.

[0050] Finally, it should be understood that the embodiments of the application disclosed herein are explanations of the principles of the embodiments of the present application. Other modified embodiments are also within the scope of the present application. Therefore, the embodiments disclosed in the present application are merely examples and not limitations. Those skilled in the art can adopt alternative configurations according to the embodiments in the present application to implement the application in the present application. Therefore, the embodiments of the present application are not limited to the embodiments accurately described in the application.

Claims

1. A contact sheet, characterized in that: include: A contact portion (10), the contact portion (10) being used to contact with other contact pieces to form an electrical connection, and having a rotating contact track area (100) or a moving contact track area (101) during the contact; And an arc-starting portion (11) located at the same end of the contact piece, wherein the arc-starting portion (11) is arranged away from the contact portion (10) and is at least partially located outside the outer contour of the rotating contact track area (100) or the moving contact track area (101).

2. A contact sheet according to claim 1, characterized in that: The arc striking portion (11) is provided with a main arc striking angle (12) having an arc striking tip, and at least the tip portion of the main arc striking angle (12) is located outside the outer contour of the rotating contact track area (100) or the moving contact track area (101).

3. A contact sheet according to claim 2, characterized in that: The arc striking portion (11) is also provided with an auxiliary arc striking angle (13) having an arc striking tip, and the main arc striking angle (12) and the auxiliary arc striking angle (13) are both arranged away from the contact portion (10).

4. A contact sheet according to claim 2, characterized in that: The transition edge (14) from the contact portion (10) to the main arc starting angle (12) is composed of a plurality of continuous tangent circular arcs.

5. A contact sheet according to claim 1, characterized in that: It also includes a contact end arranged along the contact portion (10), the contact end being composed of two inclined surfaces (15) with opposite slopes and close to each other on a side away from the arc-starting portion (11), and the length of the contact end being not less than the length of the contact portion (10).

6. An arc striking structure, comprising a moving contact (20) and a stationary contact (21), characterized in that: The moving contact (20) and / or the stationary contact (21) adopts the contact piece according to any one of claims 1 to 5.

7. The arc striking structure according to claim 6, characterized in that: It also comprises an arc extinguishing chamber (3), wherein the arc striking portion (11) at least partially extends into the arc extinguishing chamber (3).

8. The arc striking structure according to claim 7, characterized in that: The moving contact (20) adopts the contact piece, the contact portion (10) is a moving contact portion (201) arranged on the moving contact (20), the moving contact portion (201) rotates around the rotation center of the moving contact (20) to form the rotating contact track area (100), the stationary contact (21) is at least partially located in the rotating contact track area (100), and the arc striking portion (11) is at least partially located outside the outer contour of the rotating contact track area (100).

9. The arc striking structure according to claim 8, characterized in that: The rotating contact track area (100) overlaps with the axial orthographic projection area of ​​the arc extinguishing chamber (3) along the rotating axis of the moving contact (20).

10. The arc striking structure according to claim 8, characterized in that: The stationary contact (21) is arranged at one end of the arc extinguishing chamber (3), and an arc striking piece (4) is arranged at the other end of the arc extinguishing chamber (3); the moving contact portion (201) rotates between the stationary contact (21) and the arc striking piece (4), and one end of the arc striking piece (4) facing the moving contact (20) is located within a rotating contact track area (100).

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