阅读说明：本技术 一种带缓冲和导向功能的直打***式接地开关触头 (Direct-drive insertion type grounding switch contact with buffering and guiding functions ) 是由 吴上 贺坤 唐雪平 吴奇钢 张亚平 于 2019-11-13 设计创作，主要内容包括：本发明公开了一种带缓冲和导向功能的直打插入式接地开关触头,包括：静触头机构,所述静触头机构包括导电板、导向罩和接地触指,所述导向罩包括筒部和导向通道,所述筒部的一端固定连接在所述导电板上,所述导向通道横设在所述筒部的另一端,所述导向通道为“V”形状,且导向通道的通道底部与所述筒部的筒体对齐,所述接地触指为与所述筒部匹配的筒状,且设在筒部内；动触头机构,所述动触头机构包括接地导电杆、动触头,所述接地导电杆以轴线上的一点为圆心做旋转动作,所述动触头设在所述接地导电杆的顶端,所述导向通道位于所述动触头的旋转路径上,且所述导向通道的导向开口朝向所述动触头。(The invention discloses a direct-impact insertion type grounding switch contact with buffering and guiding functions, which comprises: the static contact mechanism comprises a current-conducting plate, a guide cover and a grounding contact finger, wherein the guide cover comprises a cylinder part and a guide channel, one end of the cylinder part is fixedly connected to the current-conducting plate, the guide channel is transversely arranged at the other end of the cylinder part, the guide channel is in a V shape, the bottom of the channel of the guide channel is aligned with the cylinder of the cylinder part, and the grounding contact finger is in a cylindrical shape matched with the cylinder part and is arranged in the cylinder part; the movable contact mechanism comprises a grounding conducting rod and a movable contact, the grounding conducting rod rotates by taking one point on an axis as a circle center, the movable contact is arranged at the top end of the grounding conducting rod, the guide channel is positioned on a rotating path of the movable contact, and a guide opening of the guide channel faces the movable contact.)

1. The utility model provides a take buffering and direction function's direct drive plug-in earthing switch contact which characterized in that includes:

the static contact mechanism comprises a conductive plate (100), a guide cover (200) and a grounding contact finger (300), wherein the guide cover (200) comprises a cylinder part (210) and a guide channel (220), one end of the cylinder part (210) is fixedly connected to the conductive plate (100), the guide channel (220) is transversely arranged at the other end of the cylinder part (210), the guide channel (220) is V-shaped, the bottom of the channel of the guide channel (220) is aligned with the cylinder body of the cylinder part (210), and the grounding contact finger (300) is matched with the cylinder part (210) in a cylindrical shape and is arranged in the cylinder part (210);

the moving contact mechanism comprises a grounding conducting rod (400) and a moving contact (500), the grounding conducting rod (400) rotates by taking one point on an axis as a circle center, the moving contact (500) is arranged at the top end of the grounding conducting rod (400), the guide channel (220) is positioned on a rotating path of the moving contact (500), and a guide opening of the guide channel (220) faces towards the moving contact (500).

2. The direct impact grounding switch contact with buffering and guiding function according to claim 1, wherein: and a buffer device for preventing the moving contact (500) from being impacted is arranged on the inner side wall of the guide channel (220).

3. The direct impact grounding switch contact with buffering and guiding function as claimed in claim 2, wherein: the buffer device comprises first buffer mechanisms arranged at two sides of the guide channel (220) and second buffer mechanisms arranged at the bottom of the guide channel (220);

the first buffer mechanism comprises two buffer sheets (610) which are oppositely arranged on two sides of the inner wall of the inlet of the guide channel, the head ends of the buffer sheets (610) are fixedly arranged on the inner wall of the guide channel (220) through insulating cushion blocks (620), the tail ends of the buffer sheets (610) extend along the channel direction of the guide channel (220), the tail ends of the two buffer sheets (610) are oppositely arranged to form an outlet, and the outlet is smaller than the rod diameter of the movable contact (500);

the second buffer gear includes guide block (710), establish guide block (710) on the passageway bottom inner wall of direction passageway (220), guide block (710) are the U-shaped, the opening and two of guide block (710) the export butt joint that buffer sheet (610) formed, and opening width is greater than the export width.

4. The direct impact grounding switch contact with buffering and guiding function as claimed in claim 3, wherein: and the inner side wall of the guide block (710) is provided with a lining (720) made of engineering plastics.

5. The direct impact grounding switch contact with buffering and guiding function according to any one of claims 1 to 4, wherein: the grounding contact finger is characterized in that the cylinder part (210) is cylindrical, an annular groove is formed in the outer side surface of the grounding contact finger (300), a clamping spring ring (800) is installed in the groove, and an inner lining (900) is arranged on the inner side of the grounding contact finger (300).

6. The direct impact grounding switch contact with buffering and guiding function according to any one of claims 1 to 4, wherein: the grounding contact finger (300) is in direct electrical contact with the conductive plate (100).

Technical Field

The invention relates to the technical field of power equipment, in particular to a direct-impact insertion type high-voltage grounding switch contact with buffering and guiding functions.

Background

In an electric power transmission and distribution system, a high-voltage grounding switch is widely applied to a transformer substation as an electric device for grounding protection when equipment is overhauled in a high-voltage line. The 550kV and below grounding switch generally adopts a folding arm type structure, a direct-hitting type structure or a direct-hitting insertion type structure.

Compared with a folding arm type structure, the direct-hitting type structure and the direct-hitting insertion type structure have the advantages of less parts, simple structure, smaller failure rate and low cost; the defects are that the linear velocity is high when the moving contact at the tail end of the disconnecting link moves, and the collision is large when the moving contact is contacted with the fixed contact.

The action principle of the direct beating type structure is as follows: the grounding conducting rod rotates upwards in the vertical plane, so that a moving contact on the conducting rod is directly inserted into the grounding fixed contact to complete closing. The action principle of the direct-drive insertion type structure is as follows: the grounding conducting rod firstly makes upward rotary motion in a vertical plane to enable a moving contact on the grounding conducting rod to approach a grounding static contact, and then makes upward linear motion to enable the moving contact to be inserted into the grounding static contact, so that closing action is completed. The direct-drive insertion structure has the advantages of effectively reducing impact force during switching-on, enabling actions to be more stable and enabling contact between the moving contact and the static contact to be better than the direct-drive structure, and has better capabilities of preventing wind and sand and preventing dirt due to the fact that the direct-drive insertion structure can completely wrap the top of the grounding contact finger and the periphery of the grounding contact finger by the static contact.

Disclosure of Invention

The invention aims to provide a direct-impact insertion type high-voltage grounding switch contact with buffering and guiding functions, which can provide a guiding function during switching on and well complete the switching on action.

The technical scheme adopted by the invention is as follows: a direct-impact insertion type earthing switch contact with buffering and guiding functions, comprising:

the static contact mechanism comprises a current-conducting plate, a guide cover and a grounding contact finger, wherein the guide cover comprises a cylinder part and a guide channel, one end of the cylinder part is fixedly connected to the current-conducting plate, the guide channel is transversely arranged at the other end of the cylinder part, the guide channel is in a V shape, the bottom of the channel of the guide channel is aligned with the cylinder of the cylinder part, and the grounding contact finger is in a cylindrical shape matched with the cylinder part and is arranged in the cylinder part;

the movable contact mechanism comprises a grounding conducting rod and a movable contact, the grounding conducting rod rotates by taking one point on an axis as a circle center, the movable contact is arranged at the top end of the grounding conducting rod, the guide channel is positioned on a rotating path of the movable contact, and a guide opening of the guide channel faces the movable contact.

Further optimization, the inner side wall of the guide channel is provided with a buffer device for preventing the moving contact from being impacted.

Further preferably, the buffer device comprises first buffer mechanisms arranged at two sides of the guide channel and second buffer mechanisms arranged at the bottom of the guide channel;

the first buffer mechanism comprises two buffer sheets which are oppositely arranged on two sides of the inner wall of the inlet of the guide channel, the head ends of the buffer sheets are fixedly arranged on the inner wall of the guide channel through insulating cushion blocks, the tail ends of the buffer sheets extend along the channel direction of the guide channel, the tail ends of the two buffer sheets are oppositely arranged to form an outlet, and the outlet is smaller than the rod diameter of the movable contact;

the second buffer mechanism comprises a guide block, the guide block is arranged on the inner wall of the bottom of the channel of the guide channel, the guide block is U-shaped, the opening of the guide block is in butt joint with the outlet formed by the two buffer pieces, and the width of the opening is larger than the width of the outlet.

Further preferably, the inner side wall of the guide block is provided with a lining made of engineering plastics.

Preferably, the cylinder part is cylindrical, an annular groove is formed in the outer side surface of the grounding contact finger, a clamping spring ring is installed in the groove, and an inner bushing is arranged on the inner side of the grounding contact finger.

Preferably, the grounding contact finger is in direct electrical contact with the conductive plate.

The direct-impact insertion type grounding switch contact with the buffering and guiding functions provided by the embodiment of the invention at least has the following beneficial effects: through setting up the direction passageway, provide the guide effect for the ground connection conducting rod is in the end entering direction passageway of rotation stroke, and supplementary ground connection conducting rod accomplishes the action of closing a floodgate better.

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 direct impact type grounding switch contact with buffering and guiding functions according to an embodiment of the invention;

fig. 2 is a schematic diagram of a moving contact of a direct impact type grounding switch contact with buffering and guiding functions entering a guiding channel according to an embodiment of the invention;

FIG. 3 is a bottom view of the stationary contact portion of FIG. 1;

fig. 4 is a partially enlarged schematic view of a portion of the stationary contact of fig. 2.

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 should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.