阅读说明：本技术 用于气体绝缘金属封闭开关设备的二工位开关 (Two-position switch for gas-insulated metal-enclosed switchgear ) 是由 王平 高明春 尚雨 黄强 于 2018-07-24 设计创作，主要内容包括：本发明公开了一种用于气体绝缘金属封闭开关设备的二工位开关,属于中压气体绝缘金属封闭开关设备技术领域。本发明包括气箱、动触头、静触头、绝缘主轴和操作机构,动触头和静触头设置于气箱中,绝缘主轴可旋转地安装于气箱中,动触头固定于绝缘主轴上,静触头包括连接主回路的静触头和连接接地回路的静触头,绝缘主轴在操作机构的驱动下旋转,使动触头与连接主回路的静触头连接,或者与连接接地回路的静触头连接。本发明在中压气体绝缘金属封闭开关设备内设二工位开关,连接主回路或接地回路。避免现有连接方式在做绝缘试验时,需要将连接主回路的电压主互感器拆除；避免电压互感器的更换及维护时,主回路需要断电。(The invention discloses a two-station switch for gas-insulated metal-enclosed switchgear, and belongs to the technical field of medium-voltage gas-insulated metal-enclosed switchgear. The invention comprises a gas tank, a moving contact, a static contact, an insulating main shaft and an operating mechanism, wherein the moving contact and the static contact are arranged in the gas tank, the insulating main shaft is rotatably arranged in the gas tank, the moving contact is fixed on the insulating main shaft, the static contact comprises a static contact connected with a main loop and a static contact connected with a grounding loop, the insulating main shaft rotates under the driving of the operating mechanism, and the moving contact is connected with the static contact connected with the main loop or the static contact connected with the grounding loop. The invention is provided with a two-position switch in the medium-pressure gas-insulated metal-enclosed switchgear, which is connected with a main loop or a grounding loop. The voltage main transformer connected with the main loop is prevented from being dismounted when an insulation test is performed in the conventional connection mode; when the voltage transformer is replaced and maintained, the main circuit needs to be powered off.)

1. A two-position switch for gas-insulated metal-enclosed switchgear, characterized in that: the gas tank comprises a gas tank (2), a moving contact (11), a fixed contact, an insulating main shaft (13) and an operating mechanism, wherein the moving contact (11) and the fixed contact (12) are arranged in the gas tank (2), the insulating main shaft (13) is rotatably arranged in the gas tank (2), the moving contact (11) is fixed on the insulating main shaft (13), the fixed contact comprises a fixed contact connected with a main loop and a fixed contact connected with a grounding loop, the insulating main shaft (13) rotates under the driving of the operating mechanism, and the moving contact (11) is connected with the fixed contact connected with the main loop or connected with the fixed contact connected with the grounding loop.

2. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: the static contact comprises a pressure equalizing seat (121) and a spring piece (122); the pressure equalizing seat (121) is provided with a groove, the two ends of the spring piece (122) are folded inwards respectively and then are integrally C-shaped, and the spring piece (122) is embedded in the groove of the pressure equalizing seat (121).

3. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: a voltage transformer (4) is arranged outside the air box (2), and the moving contact (11) is connected with the voltage transformer (4).

4. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: two or more moving contacts (11) are arranged on the insulating main shaft (13), and two or more groups of static contacts are correspondingly arranged.

5. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: the operating mechanism is a rotary operating mechanism and comprises a rotating shaft (142), a first gear (144) and a second gear (141) which are meshed with each other, the first gear (144) is fixed on the insulating main shaft (13), the second gear (141) is fixed at one end of the rotating shaft (142), the other end of the rotating shaft (142) penetrates out of the air box (2), the rotating shaft (142) rotates under the driving of an external driving force, and the movable contact (11) is connected with a fixed contact connected with a main loop or a fixed contact connected with a grounding loop.

6. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 5, characterized in that: the first gear (144) and the second gear (141) are both bevel gears.

7. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: the operating mechanism is a disconnecting link type operating mechanism and comprises a pull rod (151), a connecting rod (152) and a push-pull handle (153), one end of the pull rod (151) is fixed on the insulating main shaft (13), the other end of the pull rod is hinged with one end of the connecting rod (152), the other end of the connecting rod (152) penetrates out of the air box (2), the connecting rod (152) is pushed and pulled under the driving of external driving force, and the movable contact (11) is connected with a static contact connected with a main loop or connected with a static contact connected with a grounding loop.

8. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 5 or 7, characterized in that: a sealing flange (3) is arranged on the air box (2),

when the operating mechanism is a rotary operating mechanism, the other end of the rotating shaft (142) penetrates through the air box (2) through the sealing flange (3) and extends to the outside;

when the operating mechanism is a knife switch type operating mechanism, the other end of the connecting rod (152) penetrates through the air box (2) through the sealing flange (3) and extends to the outside.

9. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 5 or 7, characterized in that: the end part of the rotating shaft (142) is also provided with an operating handle,

when the operating mechanism is a rotary operating mechanism, the operating handle is a rotating handle (143), and the rotating shaft (142) is driven to rotate through the rotating handle (143).

When the operating mechanism is a disconnecting link type operating mechanism, the operating handle is a push-pull handle (153), and the connecting rod (152) is driven to push and pull through the push-pull handle (153).

10. The two-position switch for gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: the air box (2) is made of metal materials, and insulating gas is filled in the air box (2).

Technical Field

The invention belongs to the technical field of medium-voltage gas-insulated metal-enclosed switchgear, and particularly relates to a two-position switch for gas-insulated metal-enclosed switchgear.

Background

An external voltage transformer is generally used in the existing medium-voltage gas-insulated metal-enclosed switchgear, the voltage transformer and a main loop are fixedly connected, and the voltage transformer and the main loop need to be isolated when a main loop insulation test (power frequency withstand voltage) is performed. In addition, when the voltage transformer is replaced or maintained, the main circuit needs to be closed, and particularly when the voltage transformer is installed on the incoming line cabinet, the incoming line cabinet is stopped, so that the whole substation is closed.

The use of the gas-insulated two-station switch for the voltage transformer can thoroughly solve the problems, the two-station switch only needs to be switched from the connection position to the connection position when the insulation test of a main loop is required and the voltage transformer is updated or maintained, and the voltage transformer is safer to replace and maintain after being connected to the connection position.

Disclosure of Invention

The invention aims to provide a two-position switch for gas-insulated metal-enclosed switchgear, which is convenient to operate.

Specifically, the invention is realized by adopting the following technical scheme: the movable contact and the static contact are arranged in the gas tank, the insulating main shaft is rotatably arranged in the gas tank, the movable contact is fixed on the insulating main shaft, the static contact comprises a static contact connected with a main loop and a static contact connected with a grounding loop, the insulating main shaft rotates under the driving of the operating mechanism, and the movable contact is connected with the static contact connected with the main loop or connected with the static contact connected with the grounding loop.

Further, the static contact comprises a pressure equalizing seat and a spring piece; the pressure equalizing seat is provided with a groove, the two ends of the spring piece are folded inwards respectively and then are integrally C-shaped, and the spring piece is embedded in the groove of the pressure equalizing seat.

Further, a voltage transformer is arranged outside the air box, and the moving contact is connected with the voltage transformer.

Further, the insulating main shaft is provided with two or more moving contacts, and correspondingly, two or more groups of static contacts are arranged.

Further, the operating mechanism is a rotary operating mechanism and comprises a rotating shaft, a first gear and a second gear, wherein the first gear and the second gear are meshed with each other, the first gear is fixed on the insulating main shaft, the second gear is fixed at one end of the rotating shaft, the other end of the rotating shaft penetrates out of the air box, the rotating shaft is driven by an external driving force to rotate, and the movable contact is connected with a static contact connected with the main loop or a static contact connected with the grounding loop.

Further, the first gear and the second gear are both bevel gears.

Furthermore, the operating mechanism is a knife switch type operating mechanism and comprises a pull rod, a connecting rod and a push-pull handle, one end of the pull rod is fixed on the insulating main shaft, the other end of the pull rod is hinged with one end of the connecting rod, the other end of the connecting rod penetrates out of the air box, and the connecting rod is pushed and pulled under the driving of an external driving force to enable the movable contact to be connected with a static contact connected with the main circuit or connected with a static contact connected with the grounding circuit.

Furthermore, a sealing flange is arranged on the air box,

when the operating mechanism is a rotary operating mechanism, the other end of the rotating shaft penetrates through the air box through the sealing flange and extends to the outside;

when the operating mechanism is a knife switch type operating mechanism, the other end of the connecting rod passes through the air box through the sealing flange and extends to the outside.

Furthermore, the end part of the rotating shaft is also provided with an operating handle,

when the operating mechanism is a rotary operating mechanism, the operating handle is a rotary handle, and the rotary handle drives the rotating shaft to rotate.

When the operating mechanism is a disconnecting link type operating mechanism, the operating handle is a push-pull handle, and the connecting rod is driven to push and pull through the push-pull handle.

Further, the air box is made of metal materials, and insulating gas is filled in the air box.

The invention has the following beneficial effects: the invention is provided with a two-position switch in the medium-pressure gas-insulated metal-enclosed switchgear, which is connected with a main loop or a grounding loop. The voltage main transformer connected with the main loop is prevented from being dismounted when an insulation test is performed in the conventional connection mode; when the voltage transformer is replaced and maintained, the main circuit needs to be powered off. The invention is simple, safe and convenient to operate.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural diagram of the connection of the present invention with a voltage transformer.

Fig. 3 is a schematic view of the working state of the rotary operating mechanism of the present invention.

FIG. 4 is a schematic diagram of the operation of the primary circuit in the case of a rotary actuator according to the present invention.

FIG. 5 is a schematic diagram of the working state of the grounding circuit for the rotary operating mechanism of the present invention.

FIG. 6 is a schematic view of the working state of the connecting main circuit in the case of the gate type operating mechanism of the present invention.

Fig. 7 is a schematic diagram of the working state of the grounding circuit when the door-lock type operating mechanism is adopted in the invention.

Fig. 8 is a schematic structural diagram of a static contact according to the present invention.

Reference numerals in the drawings: 11-moving contact, 121-voltage equalizing seat, 122-spring piece, 13-insulating main shaft, 141-second gear, 142-rotating shaft, 143-rotating handle, 144-first gear, 151-pull rod, 152-connecting rod, 153-push-pull handle, 16-support, 2-air box, 3-sealing flange and 4-voltage transformer.

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 drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.