阅读说明：本技术 一种隔离开关触头结构及隔离开关 (Isolating switch contact structure and isolating switch ) 是由 贺坤 邓文华 陈芷涵 王林军 于 2020-06-28 设计创作，主要内容包括：本发明公开了一种隔离开关触头结构及隔离开关,所述隔离开关包括所述隔离开关触头结构,所述隔离开关触头结构包括触头,所述触头的表面设置有镀银层,所述镀银层的表面设有镀锡层。所述镀银层外包裹有一层镀锡层,锡导电性良好且锡柔软,可防止刮伤,能作为一种固体润滑剂,因此所述镀锡层有效的避免所述镀银层的脱落；另外,所述镀锡层能够有效的避免所述隔离开关在通流时出现发热发烫的现象,在一定程度上提高了隔离开关的性能、延长了隔离开关的寿命。(The invention discloses an isolating switch contact structure and an isolating switch. The tin coating is wrapped outside the silver coating, so that the tin coating has good conductivity and is soft, can prevent scratching and can be used as a solid lubricant, and the silver coating is effectively prevented from falling off; in addition, the tin coating can effectively avoid the phenomenon that the isolating switch generates heat and scalds when the isolating switch is in through-current, so that the performance of the isolating switch is improved to a certain extent, and the service life of the isolating switch is prolonged.)

1. An isolating switch contact structure, characterized in that: the contact comprises a contact, wherein a silver coating is arranged on the surface of the contact, and a tin coating is arranged on the surface of the silver coating.

2. The disconnecting switch contact structure according to claim 1, characterized in that: the thickness of the silver coating is 20 μm.

3. The disconnecting switch contact structure according to claim 1, characterized in that: the thickness of the coating of the tin coating is 8-20 mu m.

4. The disconnecting switch contact structure according to claim 3, characterized in that: the coating thickness of the tin coating is 12 mu m.

5. The disconnecting switch contact structure according to claim 1, characterized in that: the contact is made of red copper.

6. The disconnecting switch contact structure according to claim 1, characterized in that: the silver plating layer and the tin plating layer are both arranged on the inner side and/or the outer side of the contact.

7. An isolating switch, characterized in that: the isolating switch comprises an isolating switch main body, wherein the isolating switch contact structure of any one of claims 1 to 6 is arranged on the isolating switch main body.

Technical Field

The invention relates to a switch, in particular to an isolating switch contact structure and an isolating switch.

Background

The isolating switch mainly ensures the safety of the high-voltage electrical appliance and the device thereof during maintenance work, and can isolate the part of the high-voltage distribution device which needs power failure from the electrified part with ground. The disconnecting switch is usually switched on and off by engaging and separating contacts (also called contact fingers) with each other.

The main performance and life of the disconnector depends to a large extent on the quality of the material of the contacts. In order to obtain better performance, the surface of the conventional contact is plated with a silver plating layer. Because the isolating switch can produce great frictional force when opening and closing the floodgate, along with the operation number of times increases, long-term wearing and tearing can lead to the contact silvered film to drop, reduce its isolating switch performance, easily generate heat at the operation through-flow in-process, also can shorten life to a certain extent.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the contact structure of the isolating switch, which can effectively prevent the silver coating from falling off.

The contact structure of the isolating switch comprises a contact, wherein a silver coating is arranged on the surface of the contact, and a tin coating is arranged on the surface of the silver coating.

The contact structure of the disconnecting switch according to the embodiment of the invention at least has the following technical effects: the tin coating is wrapped outside the silver coating, so that the tin coating has good conductivity and is soft, can prevent scratching and can be used as a solid lubricant, and the silver coating is effectively prevented from falling off; in addition, the tin coating can effectively avoid the phenomenon that the isolating switch generates heat and scalds when the isolating switch is in through-current, so that the performance of the isolating switch is improved to a certain extent, and the service life of the isolating switch is prolonged.

According to some embodiments of the invention, the silver plating layer has a plating thickness of 20 μm.

According to some embodiments of the invention, the tin plating layer has a plating thickness of 8 to 20 μm.

According to some embodiments of the invention, the tin plating layer has a plating thickness of 12 μm.

According to some embodiments of the invention, the contact is made of copper.

According to some embodiments of the invention, the silver plating layer and the tin plating layer are both disposed inside and/or outside the contact.

On the other hand, the invention provides an isolating switch, which comprises an isolating switch main body, wherein the isolating switch contact structure in the embodiment is arranged on the isolating switch main body.

The isolating switch provided by the embodiment of the invention at least has the following technical effects: the isolating switch with the isolating switch contact structure is applied, the heating degree is reduced to a certain extent, and the service life is prolonged.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a contact structure of a disconnecting switch according to the present invention;

FIG. 2 is a schematic diagram of the layering of the isolator contact structure of the present invention;

reference numerals: contact 100, silver plating layer 101, tin plating layer 102.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

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.

Referring to fig. 1 and 2, the invention provides a contact structure of an isolating switch, which comprises a contact 100, wherein a silver coating 101 is arranged on the surface of the contact, and a tin coating 102 is arranged on the surface of the silver coating 101.

The structure of the disconnecting switch contact 100 according to the embodiment of the invention has at least the following technical effects: the silver plating layer 101 is wrapped by the tin plating layer 102, tin has good conductivity and is soft, can prevent scratching and can be used as a solid lubricant, so that the tin plating layer 102 effectively avoids the silver plating layer 101 from falling off; in addition, the tin-plated layer 102 can effectively avoid the phenomenon that the isolating switch generates heat and is hot when the isolating switch is in a through-current state, so that the performance of the isolating switch is improved to a certain extent, and the service life of the isolating switch is prolonged.

In some embodiments of the present invention, the thickness of the plated layer of the silver plated layer 101 is 20 μm.

In some embodiments of the present invention, the thickness of the tin coating layer 102 is 8 to 20 μm.

Through a plurality of tests, the tin-plated layer 102 with the plating thickness of 12 microns is found to be lower in manufacturing cost on the premise of meeting good service performance. In some embodiments of the present invention, the plating thickness of the tin plating layer 102 is 12 μm.

In some embodiments of the invention, the contact 100 is made of copper.

In some embodiments of the invention, the silver plating layer 101 and the tin plating layer 102 are both disposed at the contact position of the contact 100, which saves cost. For the static contact, the silver plating layer 101 and the tin plating layer 102 are arranged on the inner side or the outer side of the static contact, and for the movable contact, the silver plating layer 101 and the tin plating layer 102 are arranged on the inner side or the outer side of the movable contact.

The silver plating layer 101 and the tin plating layer 102 may be provided by electroplating. Firstly, the contact 100 is immersed in silver plating solution in a plating bath, and a silver plating layer 101 with the thickness of 20 μm is plated on the surface of the contact 100 by controlling the plating time and the magnitude of the electrified current. Then, washing the silver-plated contact 100 with water to remove silver electroplating solution on the surface of the contact 100; then the contact 100 is placed in a tin plating solution in an electroplating tank, and a tin plating layer 102 with the thickness of 12 mu m is plated outside the silver plating layer 101 by controlling the electroplating time and the magnitude of the electrified current.

The invention also provides an isolating switch, which comprises an isolating switch main body (not shown in the figure), wherein the isolating switch main body is provided with the isolating switch contact structure in the embodiment.

The isolating switch provided by the embodiment of the invention at least has the following technical effects: the isolating switch with the isolating switch contact structure is applied, the heating degree is reduced to a certain extent, and the service life is prolonged.

In addition, through comparison of temperature rise tests of the double-column horizontal rotary isolating switch, compared with the traditional contact only plated with silver, the temperature rise of the contact 100 provided by the invention can be reduced by 10% -20%, and the problem of contact heating is effectively avoided under the condition that the through-flow of the isolating switch is normal.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.