RU187271U1 - AC DISCONNECTOR - Google Patents

Abstract

The utility model relates to the field of high-voltage apparatus engineering and can be used in high voltage disconnectors installed on poles of power lines and substations. The AC disconnector consists of a two-frame structure located in the vertical plane. The upper movable frame 1 with insulators of the upper contact group of the current-carrying system is rigidly connected by means of holders 3 to the housings of two linear drives 4 located on its outer opposite sides. The lower frame 2 with insulators 5 of the reciprocal lower contact group of the current-carrying system is fixedly mounted on the bracket and rigidly connected to the rods of two linear electric drives 4 to move the upper frame 1. On the lower frame 2, on the bracket 15, the third linear electric drive 13 is rigidly fixed with its rod. the housing of the electric drive 13 is movably, with the possibility of blocking, fixed on the shaft of the earthing switches 10 with elements of mechanical blocking 14. A design of two (movable and fixed) frames carrying a current-carrying system mu equipped with three linear electric drives, increases the reliability and ease of operation of the disconnector. 4 ill.

Description

The utility model relates to the field of high-voltage apparatus engineering and can be used in high voltage disconnectors installed on poles of power lines and substations.

The prior art disconnectors of various types are known, which are controlled mechanically by means of metal rods. In various versions of the disconnectors, the number of rods can be from one to three 6-8 meters long.

For example, a horizontally-rotary disconnector containing a frame with insulating columns on which contact blades of the main current-carrying system are installed (Utility Model of the Russian Federation No. 29403 IPC H01H 31/20, published May 10, 2003).

 Also known is a linear disconnector of a swinging type (Utility Model of the Russian Federation No. 130450, IPC H01H 31/00, published on 07/20/2013). A disadvantage of the known disconnector is the design complexity, high weight, and high metal consumption in manufacturing.

The closest to the achieved result (prototype) is an AC disconnector (Utility Model of the Russian Federation No. 178666, IPC H01H 31/00, publ. 18.04.2018). The known disconnector is made in the form of an apparatus with a vertical principle of action. The frame design of the disconnector consists of three frames placed in a vertical plane, the upper and lower of which are mounted with the possibility of reciprocating movement vertically, and the middle frame is mounted motionless on the bracket. The lower movable frame is made in the form of a U-shaped design and is connected with the upper movable frame and with the displacement drive. To stabilize the upper frame relative to the middle, a guide system is provided in the form of upper and lower guide elements. The insulators and the contact group are fixed on the upper movable frame, and the response contact group is fixed on the insulators located on the middle fixed frame. The earthing switch is turned on by turning the earthing switch shaft with a bar.

A disadvantage of the known disconnector is the design complexity, as well as the drawbacks of its guide system identified as a result of operation that impede the reliable operation of the disconnector, such as a violation of the integrity of the anti-corrosion coating due to friction when moving the lower guide elements inside the upper cavity and, as a result, metal corrosion , as well as the formation of ice on the rod (inner guide) at low temperatures, which makes it difficult to turn on the disconnector in the winter and izhaet its reliability.

The challenge facing the utility model is to increase the reliability of the disconnector and increase the convenience of its operation.

The problem is solved due to the fact that the vertical frame structure is made of two (movable and fixed) frames bearing contact group insulators, while three linear electric drives are fixed to the frames, and two electric drives through the holders connect the corresponding edges of the upper and lower frames, and the third electric drive is mounted on the bracket of the lower frame and is movably connected to the shaft of the ground electrodes.

The technical result of using the utility model is to increase the reliability of the device by simplifying the design. The frame design of the disconnector consists of two frames (upper movable and lower stationary). To move and stabilize the upper frame relative to the lower, linear electric drives are provided, controlled by a portable battery. The design ensures tightness of the placement of moving parts (linear electric drives perform the function of the guides), which protects the moving parts from corrosion and icing, and prevents excessive friction of metal surfaces due to the implementation of the moving element in the form of a sliding rod of the electric drive, which significantly increases the reliability and ease of use.

The essence of the utility model is that in an AC disconnector containing, located in a vertical plane, a frame structure with insulators installed on it, a current-carrying system and earthing switches, the frame structure consists of two frames on which three linear electric drives are installed. The upper frame of the disconnector, with the insulators of the upper contact group of the current-carrying system, is rigidly connected by means of holders to the housings of two linear electric drives located on its outer opposite sides, and the lower frame, with the insulators of the corresponding lower contact group of the current-carrying system, is fixedly mounted on the bracket and rigidly connected to rods of two linear electric drives moving the upper frame. On the lower frame, on the bracket, the rod of the third linear electric drive is rigidly fixed on one side, and on the opposite side the drive housing is movably fixed to the shaft, equipped with mechanical locking elements, grounding conductors.

The essence of the proposed utility model is illustrated by graphic materials:

Figure 1 shows a diagram of a General view of the disconnector in the on position;

Figure 2 - shows the disconnector, side view;

Figure 3 - shows a side view of the disconnector in the off position, with the earthing switches on;

Figure 4 - shows a General view of the disconnector in a perspective view.

The disconnector consists of two frames: the upper movable frame 1, the lower fixed frame 2 mounted on the bracket (not shown in Fig.), Holders 3, linear actuators 4 of the disconnector .. The device contains: insulators 5 of the current-carrying system, current-carrying parts, consisting of the upper knives 6 and lower knives 7, stiffeners 8, ground electrodes 9, shaft of ground electrodes 10; the earthing knives 11, the grounding contacts 12, the linear electric drive of the earthing switch 13, the mechanical locking elements 14, the bracket of the lower frame 15. (Fig.1,2).

The upper movable frame 1 is a welded structure of a rigid profile or profile pipe, on which insulators 5 are installed, with the upper knives 6 of the current-carrying part fixed to them. On the opposite edges of the frame 1 are rigidly fixed, by means of holders 3, two linear electric actuators 4.

The lower stationary frame 2 of the disconnector is a welded structure on which insulators 5 are mounted with the lower knives 7 of the current-carrying part attached to them, and linear electric drives 4 are located rigidly mounted on opposite edges, respectively, mounted on the upper frame 1. On the vertical side surface of the lower frame 2 is equipped with earthing switches 9 with a single shaft 10 and mechanical locking elements 14. On the lower frame 2, to the bracket 15, a third linear electric drive 13 is rigidly attached with its rod, and with opposites sides of the drive housing 13 is movably secured to the shaft 10 with the earthing elements of mechanical lock 14, allowing rotation of the shaft 10 about its axis.

The current-carrying system of the disconnector is divided into two parts - movable and fixed. The fixed part is made in the form of contact knives 7 from a copper bus, mounted on the upper flanges of the insulators 5 of the lower fixed frame 2 with a fastening system for the air wire (or cable) and earthing knives 11. The movable part is made in the form of contact knives 6 from a copper bus, fixed through the stiffener 8 on the lower flanges of the insulators 5 of the upper frame 1.

The earthing switch of the disconnector consists of, in fact, earthing switches 9 with knives 11, a shaft of earthing switches 10 and grounding contacts 12.

The disconnector operates as follows.

In the off state, the movable frame 1 is at the upper point, providing the necessary air gap between the upper 6 and lower 7 knives of the current-carrying part (figure 3). The disconnector is switched on through linear electric drives 4, fixed by means of holders 3 on the frame 1, the rod of which is retracted when voltage is applied to the DC motors, rigidly connected to the upper movable frame 1 and the lower stationary frame 2, thereby moving the upper frame 1 down. As a result of the movement of the frame 1, the upper knives 6 are connected to the lower knives 7 of the frame 2, thereby forming a closed circuit for the flow of electric current (Fig.1,2). The disconnector is switched off by lifting the movable frame up, due to the extension of the rods of the linear actuators 4. As a result of moving up the movable frame 1, the upper knives 6 of the upper movable frame 1 disengage from the lower knives 7 of the lower frame 2 and form an air gap that excludes the possibility electric current flow. The inclusion of grounding 9 is carried out with the disconnector disconnected. The earthing switches are turned on by turning the shaft of the earthing switches 10 by extending the rod of the linear actuator 13. The knives 11 of the earthing switches 9 are connected to the ground contacts 12. In this case, the mechanical lock 14 rests on the holders 3 of the upper frame and prevents the upper frame 1 from moving down if an unauthorized switch is disconnected (figure 3).

The proposed disconnector is simple and reliable in operation due to the implementation of a frame structure of two frames, and ensuring the exact interaction of its components, which provides the possibility of simple and reliable closing and opening of the device contacts by simple vertical movement, directly by the rod of a linear electric drive, without additional guiding means. In addition, the presence of an electric drive mounted on a fixed frame, connected to the ground electrode shaft and fixed with the possibility of its rotation around its axis, increases the convenience of controlling the disconnector. The disconnector is easy to manufacture, due to the small number of components and the use of light profile pipes for the manufacture of frames that provide the necessary rigidity.

Thus, the problem facing the utility model is solved.

Claims (1)

An alternating current disconnector comprising a frame structure located in a vertical plane with insulators installed on it, a current-carrying system and earthing switches, characterized in that the frame structure consists of two frames on which three linear electric drives are mounted, with the upper frame with insulators of the upper contact group of the current-carrying system, rigidly connected by means of holders to the housings of two linear electric drives located on its outer opposite sides, and the lower frame, with insulators the reciprocal lower contact group of the current-carrying system is fixedly mounted on the bracket and rigidly connected to the rods of two linear electric drives for moving the upper frame, and the rod of the third linear electric drive is rigidly fixed on the bracket for the lower frame, and its body, on the opposite side, is movably mounted on the shaft of the ground electrodes.

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