WO2016078625A1

WO2016078625A1 - High voltage switch moving contact mechanism, and high voltage switch using same

Info

Publication number: WO2016078625A1
Application number: PCT/CN2015/096393
Authority: WO
Inventors: 孙英杰; 段晓辉; 张友鹏; 魏建巍; 江经华; 张银穗; 柴影辉; 王赛豪; 柏长宇
Original assignee: 国家电网公司; 平高集团有限公司
Priority date: 2014-11-17
Filing date: 2015-12-04
Publication date: 2016-05-26
Also published as: CN104766731B; CN104766731A

Abstract

A high voltage switch moving contact mechanism, and a high voltage switch using the same. The high voltage switch moving contact mechanism comprises a moving contact (1) using a front end as a docking end, the moving contact being assembled in a guided manner along the axial direction on a guide rail component (2), the moving contact also being provided with a through-hole penetrating in the axial direction, a nut (4) being fixedly assembled in the through-hole or at one end of the through-hole, a screw (3) being assembled in the nut, a front end of the screw extending into the through-hole of the moving contact. In actual terms, the screw and the nut form a screw-nut mechanism, and the moving contact is fixed together with the nut. Therefore, when the moving contact is driven by the screw to move back and forth along the axial direction, the screw itself is free of axial movement, thereby reducing the space required at the rear of the screw, and solving the problem that existing high voltage switches are large in volume.

Description

High-voltage switch moving contact mechanism and high-voltage switch using the same

Technical field

The invention relates to the field of high voltage electrical appliances, in particular to a high voltage switch moving contact mechanism and a high voltage switch using the same.

Background technique

The high-voltage switch requires a transmission structure to drive the moving contact to realize the switching and closing operation of the high-voltage switch. Due to the danger of the high-voltage power grid, the grid imposes stringent requirements on the reliability of the switching and closing of the high-voltage switch, otherwise it will cause fatal consequences. In order to meet the requirements, the transmission structure of the high-voltage switch is often bulky, complicated in structure and high in cost. Taking the circuit breaker as an example, the moving contacts of the existing circuit breaker are driven by the corresponding pull rods. During the working process, the moving contact is opened and closed by the axial reciprocating motion of the pull rod, and the reciprocating motion of the pull rod It is necessary to occupy more space itself, and a driving mechanism for driving the rod to reciprocate. In the prior art, the reciprocating motion of the switch rod is often provided by a corresponding arm mechanism, and these components such as the arm mechanism also increase the high voltage. The volume of the switch increases the production cost of the high voltage switch.

Summary of the invention

The object of the present invention is to provide a high-voltage switch moving contact mechanism to solve the problem of large volume of the existing high-voltage switch.

At the same time, it is an object of the present invention to provide a high voltage switch using the above high voltage switch moving contact mechanism.

In order to solve the above problems, the high-voltage switch moving contact mechanism adopts the following technical solutions: a high-voltage switch moving contact mechanism, including a moving contact with a front end as a plug end, and the movable contact is axially guided to be mounted on a rail member, and An axially penetrating through hole is defined in the movable contact, and a nut is fixedly fixed to one end of the through hole, and a screw is assembled in the nut, and a front end of the lead screw extends to the through hole of the movable contact in.

The nut is fitted with a slider extending radially outward, and the movable contact is guided and engaged with the rail member through the slider.

The lead screw is connected with an insulating rod through a rear end, and the insulating rod is rotatably assembled on a support base.

The outer contour of the nut is a stepped shaft shape, and includes a small diameter section at the front end and a large diameter section at the rear end, and a step surface facing forward is formed between the large and small diameter sections, and the step surface is attached to the rear end surface of the movable contact Hehe.

The small diameter section of the nut is inserted into the through hole of the movable contact, and the outer peripheral surface of the large diameter section does not protrude from the movable contact in the radial direction.

The high-voltage switch adopts the following technical solutions: a high-voltage switch includes a movable contact mechanism, and the movable contact mechanism includes a movable contact with a front end as a plug end, and the movable contact is axially guided and assembled on a rail member, and the movable contact An through hole is formed in the through hole, and a nut is fixedly fixed at one end of the through hole, and a screw is assembled in the nut, and a front end of the screw extends into the through hole of the movable contact.

Since the movable contact of the high-voltage switch moving contact mechanism of the present invention is axially guided to be mounted on one of the rail members, in addition, the movable contact is provided with an axial through hole, and the through hole or the through hole A nut is fixedly mounted at one end, and a screw is assembled in the nut. The front end of the lead screw extends into the through hole of the movable contact. The nut and the screw actually form a screw nut mechanism, and the movable contact is fixed to the nut. Together, therefore, during the reciprocating movement of the movable contact in the axial direction by the lead screw, the lead screw itself has no axial movement, thereby reducing the space required at the rear of the lead screw, thereby solving the existing high voltage. The problem of large switch size.

Furthermore, the slider can not only realize the guiding fit between the moving contact and the rail component, but also realize the anti-rotation cooperation between the two, and integrate the guiding and the rotating component, thereby further simplifying the moving contact mechanism. The structure reduces the volume of the high-voltage switch; the insulation rod is arranged to ensure mutual insulation between the movable contact and the outside, and to ensure the safety performance of the movable contact mechanism; the step surface of the nut is fitted to the rear end surface of the movable contact In order to ensure that the moving contact does not slip relative to the nut when it is subjected to the nut thrust; the outer peripheral surface of the large diameter section of the nut does not protrude from the moving contact in the radial direction in order to prevent it from interfering with other components such as the rail member.

DRAWINGS

1 is a schematic structural view of an embodiment of a high voltage switch moving contact mechanism.

detailed description

An embodiment of the high voltage switch moving contact mechanism, as shown in FIG. 1, the high voltage switch moving contact mechanism comprises a moving contact 1, a rail member 2 and a screw nut mechanism.

The movable contact 1 has a front end as a plug end, and a through hole extending through the axial direction is provided therein. The rail member 2 is a rail member of the movable contact 1, and the specific part thereof can be a cylinder type, a rail type, etc., as long as it can It is sufficient to guide the assembly of the movable contact 1 in the axial direction.

The nut 4 of the screw nut mechanism is fixedly mounted on the movable contact 1. In the embodiment, the nut 4 is fixedly assembled at the rear end of the movable contact 1, and the outer contour of the nut 4 is a stepped shaft shape, which is included at the front end. The small diameter section and the large diameter section at the rear end form a step surface facing forward between the large and small diameter sections, and the step surface is in contact with the rear end surface of the movable contact 1, and in this embodiment, the large diameter section of the nut 4 The outer contour is flush with the outer peripheral surface of the movable contact 1. In addition, the nut 4 is also fitted with a slider 5 extending radially outward, by means of which the movable contact 1 is guided in cooperation with the rail member 2. Screw nut mechanism The front end of the lead screw 3 extends into the through hole of the movable contact 1, and the rotation of the lead screw 3 can drive the nut 4 to reciprocate in the axial direction with the movable contact 1. In order to achieve the power input, the lead screw 3 is connected to the insulating rod 6 through the rear end, and the insulating rod 6 is rotatably mounted on a support seat via the bearing 7.

In addition, it is particularly pointed out that the screw angle of the screw nut mechanism is not greater than the self-locking angle of the two, and the front and rear force exerted on the nut cannot drive the screw to rotate, so when the operating mechanism of the high-voltage switch fails, The high-voltage switch moving contact will not automatically close or open due to the action of gravity, thereby avoiding life danger or causing other accidents to the maintenance personnel.

In other embodiments of the high-voltage switch moving contact mechanism, the outer peripheral surface of the large diameter section of the nut does not protrude from the movable contact in the radial direction; the guiding fit between the nut and the rail member may also use a guide wheel or the like. The nut may also be mounted at a position between the both ends of the through hole of the movable contact.

In the embodiment of the high-voltage switch, the high-voltage switch includes a movable contact mechanism. The structure of the movable contact mechanism is as shown in FIG. 1 , and the structure of the embodiment of the movable contact mechanism is the same, and details are not described herein.

Claims

The high-voltage switch moving contact mechanism comprises a movable contact with a front end as a plug end, wherein the movable contact is axially guided and assembled on a rail component, and the movable contact is provided with an axial through hole. A nut is fixedly mounted in the through hole or at one end of the through hole, and a screw is assembled in the nut, and a front end of the lead screw extends into the through hole of the movable contact.
The high-voltage switch moving contact mechanism according to claim 1, wherein the nut is fitted with a slider extending radially outward, and the movable contact is guided and engaged with the rail member through the slider.
The high-voltage switch moving contact mechanism according to claim 1, wherein the lead screw is connected with an insulating rod through a rear end, and the insulating rod is rotatably assembled on a support base.
The high-voltage switch moving contact mechanism according to claim 1 or 2 or 3, wherein the outer contour of the nut is a stepped shaft shape, and includes a small diameter section at the front end and a large diameter section at the rear end, A step surface facing forward is formed between the small diameter segments, and the step surface is in contact with the rear end surface of the movable contact.
The high-voltage switch moving contact mechanism according to claim 4, wherein the small diameter section of the nut is inserted into the through hole of the movable contact, and the outer peripheral surface of the large diameter section does not protrude from the movable contact in the radial direction.
The high-voltage switch comprises a movable contact mechanism, and the movable contact mechanism comprises a movable contact with a front end as a plug end, wherein the movable contact is axially guided and assembled on a rail component, and the movable contact is provided An axially through hole is fixedly fitted with a nut in the through hole or at one end of the through hole. The nut is equipped with a lead screw, and the front end of the lead screw extends into the through hole of the movable contact.
The high voltage switch of claim 6 wherein the nut is fitted with a radially outwardly extending slider through which the movable contact is in guiding engagement with the rail member.
The high voltage switch according to claim 6, wherein said lead screw is connected to an insulating rod through a rear end, and the insulating rod is rotatably mounted on a support base.
The high-voltage switch according to claim 6 or 7 or 8, wherein the outer contour of the nut is a stepped shaft shape, and includes a small diameter section at the front end and a large diameter section at the rear end, between the large and small diameter sections. A step surface facing forward is formed, and the step surface is in contact with the rear end surface of the movable contact.
The high voltage switch according to claim 9, wherein the small diameter section of the nut is inserted into the through hole of the movable contact, and the outer peripheral surface of the large diameter section does not protrude from the movable contact in the radial direction.