RU201659U1 - High-voltage disconnector - Google Patents

Abstract

The utility model relates to a high-voltage disconnector containing a frame on which in one phase there are two fixed insulators with main contacts, where on one fixed insulator on the upper flange there is a grounding contact, one movable main contact fixed on one of the contacts of the fixed insulator, and with a movable insulator fixed on it, a control lever placed on the frame with the possibility of rotation on its axis and mechanically connected through the shaft of the movable insulator with a movable contact, while the control lever is configured to sequentially open the main contacts and close the ground contact, and a handle control associated with the control lever, made with the possibility of fixing the position. The frame is made in the form of a welded structure of profiled elements, a ground contact is made on the control lever, the movable insulator is fixed on one side, with the possibility of rotation, on an axis installed in the movable main contact, and on the other side, it is fixed with the possibility of rotation on a shaft having linear movement and associated with the control lever, while the control lever, by means of the control handle, is configured to rotate on its axis, rotate the movable ground contact and sequentially open the main contacts through the position of all off contacts, and connect the fixed ground contacts located on the upper flange of a fixed insulator and movable ones located directly on the control lever. The technical result of the proposed device is to increase the reliability of the structure, simplify the kinematics. 1 wp f-ly, 3 dwg

Description

The utility model relates to high-voltage equipment, in particular, to combined-type switching devices with the possibility of grounding and can be used in high-voltage electrical networks to create a visible break in the electrical circuit.

Various types of disconnectors are known from the prior art for use in medium voltage electrical networks.

All known swing, chopping and rotary disconnectors have a frame with movable and fixed insulators, located in the lower part of the support one- (Linear swing-type disconnector (two-position) RLKZH-10) or two-shaft (two-column external linear disconnector - RLND-10, linear swinging disconnector - RLK-10, etc.) drive, have a lock, which excludes the possibility of turning on grounding contacts when the main contacts are on or turning on the main contacts when the grounding contacts are on) and connected by means of rods with a disconnector at the top, on the support.

The closest technical solution is RF patent No. 157350 dated November 27, 2015, which discloses a high-voltage disconnector. This disconnector contains a frame on which two fixed insulators and one movable insulator with main contacts located on the shaft are located in one phase, as well as one movable grounding contact. In this case, the frame is made of a composite of spars, rigidly connected to each other, the shaft of the movable insulator and the shaft of the grounding contact are mechanically connected by a control lever placed on the frame with the possibility of turning on its axis, equipped with sliding levers fixed on it with the possibility of sequential opening of the main contacts and, through the position of all off contacts, turning on the grounding contact located on the upper flange of the fixed insulator. Also on the control handle associated with the control lever there is a position lock.

The disadvantages of this device are:

- the presence of two sliding levers. When located in the open air, wind, snow and other loads will inevitably shift the position of the levers in the slots, which will change the actual position of the main and grounding knives in space over time;

- assembly with clamps and the presence of a sliding lever of the main knives guarantee backlash in the structure after a certain period of time;

- the need to attach a composite rod to the post in its middle part

- the presence of a significant number of mechanical connections and an additional grounding shaft reduces the overall reliability of the structure.

The task of the utility model is to improve the reliability of the structure and simplify the kinematics. The solution to these problems is achieved by changing the kinematics of the main knives movement, eliminating the sliding levers, sliding elements on the main knives, combining the movable ground contacts with the lever for operating the main knives into one whole, as well as eliminating the need for a composite thrust and fixing it at the midpoint to the post.

The technical result of the proposed device is to increase the reliability of the structure, simplify the kinematics.

The technical result is achieved by the fact that the high-voltage disconnector contains:

- a frame on which two fixed insulators with main contacts are located in one phase, where a grounding contact is located on one fixed insulator on the upper flange,

- one movable grounding contact, fixed on one of the contacts of the fixed insulator, and with a movable insulator fixed on it,

- a control lever located on the frame with the possibility of rotation on its axis and mechanically connected, through the shaft of a movable insulator, with a movable ground contact, while the control lever is configured to sequentially open the main contacts and close the ground contact, and

- a control handle associated with the control lever, made with the possibility of fixing the position.

In this case, the frame is made in the form of a welded structure of profiled elements, a ground contact is made on the control lever, the movable insulator is fixed on one side, with the possibility of rotation, on an axis installed in the movable main contact, and on the other side, with the possibility of rotation, on shaft having linear movement and associated with the control lever, while the control lever by means of the control handle is configured to rotate on its axis, rotate the movable ground contact and sequentially open the main contacts through the position of all off contacts, and connect the fixed ground contacts located on the upper flange of the fixed insulator and movable ones located directly on the control lever.

The ground contact is fixed to the control arm and the main contacts are connected to the control arm by means of a shaft and a movable insulator.

The design of the device is shown in Fig. 1-3, where:

in fig. 1 shows a general view of the proposed device in position 1, where the main contacts are on, the grounding contacts are disconnected;

in fig. 2 shows a general view of the proposed device in position 2, where the main contacts are disconnected, the grounding contacts are disconnected;

in fig. 3 shows a general view of the proposed device in position 3, where the main contacts are disconnected, the grounding contacts are turned on.

The figures show:

1 - grounding contact of the control lever;

2 - fixed support insulator with grounding contact;

3 - grounding contact mounted on a fixed support insulator;

4 - main contact - cable connection point, from the side of the grounding contact;

5 - the main moving contact;

6 - movable insulator;

7 - main contact - cable connection point;

8 - stationary support insulator;

9 - disconnector frame;

10 - control lever;

11 - axis of rotation of the control lever;

12 - the base of the disconnector frame;

13 - pull of the control handle;

14 - control handle;

15 - retainer of the main contacts;

16 - clamp of grounding contacts;

17 - drive plate with movable contact latches located on it.

FIG. 1 schematically shows the high-voltage disconnector in the closed position (main contacts closed, grounding contacts open). The high-voltage disconnector contains a frame 9, located on the base 12. Fixed insulators 8 and 9 are installed on the frame. A shaped control lever 10 fixed on its axis 11, with grounding contacts 1 located on this lever. The main movable contact 5 fixed on the contact 4 of the fixed insulator 2 is connected to the lever 10 by means of a movable insulator 6. Above the stationary support insulators 2 and 8 in the upper part, the corresponding stationary contacts 4 and 7 are fixed. And above the stationary support insulator 2, a grounding contact is fixed 3. The force from the control handle 14 is transmitted by means of the drive 17, thrust 13 to lever 10. In this case, the drive has a retainer for the main contacts 15 and a retainer for grounding contacts 16.

The disconnector works as follows.

When the latch of the main contacts 15 is released from the first static position of the switched on main contacts (fixed contacts 4, movable contact 5 and fixed contact 7 are connected), see FIG. 1 and disconnected grounding contacts 1, by the drive 17, when the control handle 14 is turned clockwise (down), the thrust 13 moves downward, the lever 10 moves about its axis 11 clockwise (down approximately 45 degrees relative to the horizon) and the movable main contact 5 by moving counterclockwise the movable insulator 6 mounted on the bent shaft (up) and setting the device to a second static position. In this case, the grounding contact 1 of the lever 10 moves clockwise (up).

When the latch of the main contacts 15 is released from the second fixed position of the disconnected main contacts (fixed contacts 4 and movable contact 5 are disconnected from fixed contact 7), see FIG. 2 and disconnected grounding contacts 1, further rotate the control handle 14 clockwise (down) to the position of the latch of grounding contacts 17 (in the third fixed position). As a result, the thrust 13 moves downward, the lever 10 moves clockwise relative to its axis 11 (down by approximately 75 degrees relative to the horizon) and the movable contact 5 is lifted upward due to the counterclockwise movement of the movable insulator 6 mounted on the bent shaft (up ) and placing the device in the third fixed position. In this case, the grounding contact 1 of the lever 10 moves clockwise (upward) and is connected to the grounding contact 3 located on the upper flange of the fixed insulator 2.

The device is returned to the first fixed position in the reverse order.

The maintainability of the disconnector is ensured by a fully welded rigid supporting frame (it is possible to replace one or more phases of the disconnector without replacing the frame). The technical effect is to increase the reliability of the structure and maintainability of the device due to the elimination of sliding contacts and the grounding shaft, as well as the presence of a welded frame without foci of corrosion and closed cavities. Thus, the task facing the utility model has been solved.

Claims (7)

1. High-voltage disconnector containing a frame on which two fixed insulators with main contacts are located in one phase, where a ground contact is located on one fixed insulator on the upper flange, one movable main contact, fixed on one of the contacts of the fixed insulator, and with a movable insulator fixed on it, a control lever located on the frame with the possibility of rotation on its axis and mechanically connected through the shaft of the movable insulator with a movable contact, while the control lever is configured to effect sequential opening of the main contacts and closing the ground contact, and a control handle associated with a control lever configured to fix a position, characterized in that the frame is made in the form of a welded structure of profiled elements, a ground contact is made on the control lever, the movable insulator is fixed on one side, with the possibility of rotation, on an axis installed in the movable main contact, and on the other side, it is fixed, with the possibility of rotation, on the shaft, having linear movement and associated with the control lever, while the control lever, by means of the control handle, is configured to rotate on its axis, rotate the movable ground contact and sequentially open the main contacts through the position of all off contacts, and connect the fixed ground contacts located on the upper flange is a fixed insulator and movable, located directly on the control lever. 2. Disconnector according to claim 1, characterized in that the ground contact is fixed to the control lever and the main contacts are connected to the control lever by means of a shaft and a movable insulator.

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