CN204178992U - The conductive structure of twin columns vertical opening type high-voltage alternating current isolating switch - Google Patents

Abstract

The conductive structure of the double-column vertical open type high-voltage AC isolating switch of the utility model includes a conductive switch knife and a static contact; the conductive switch knife includes a base bracket, a conductive rod, a moving contact and a transmission shaft; one end of the base bracket is provided with wiring Terminal, the other end of which is fixed with a knife seat; one end of the conductive rod is provided with a moving contact, the other end is hinged on the knife seat through a shaft, and the upper part of the conductive rod near the hinged end is hinged with the vertical arm in the same direction as the direction of motion; the conductive rod is connected by a spring The contact fingers are electrically connected to the knife holder, and the knife holder is electrically connected to the base bracket through a soft connection; the transmission shaft is vertically arranged on the base bracket through the bearing seat, and the output end of the transmission shaft is connected to a horizontal plane parallel to the surface of the base bracket. The free end of the horizontal crank arm is connected to the free end of the vertical crank arm through a universal bearing; the static contact includes a bracket and a contact piece, one end of the bracket is provided with a terminal, and the other end is fixedly provided with a contact piece that matches the moving contact .

Description

Conductive structure of double-column vertical opening high-voltage AC disconnector

technical field

The utility model relates to the field of high-voltage equipment, in particular to a conductive structure of a double-column vertical opening type high-voltage AC isolating switch.

Background technique

With the rapid development of domestic and foreign power industry and power grid construction, the demand for high-voltage electrical products is increasing, and the performance requirements for power equipment are also getting higher and higher. At present, most of the conductive blades in the double-column high-voltage AC isolation switch adopt a folding arm structure, and the folding arm structure uses a rack and pinion to rotate. There are many transmission links in the product, and the transmission structure is relatively complicated.

Utility model content

Aiming at the problems existing in the prior art, the utility model provides a conductive structure of a double-column vertical opening high-voltage AC isolating switch with unique structure, stable reliability, convenient operation and easy maintenance.

The utility model is realized through the following technical solutions:

The conductive structure of the double-column vertical opening high-voltage AC disconnector includes a conductive knife and a static contact; the conductive knife includes a base bracket, a conductive rod, a moving contact and a drive shaft; one end of the base bracket is provided with a terminal, and the other One end is fixed with a knife seat; one end of the conductive rod is provided with a moving contact, and the other end is hinged on the knife seat through a shaft. The knife seat is electrically connected, and the knife seat is electrically connected to the base support through a soft connection; the transmission shaft is vertically arranged on the base support through the bearing seat, and the output end of the transmission shaft is connected to a horizontal crank arm that rotates parallel to the surface of the base support. The free end of the horizontal crank arm is connected to the free end of the vertical crank arm through a universal bearing; the static contact includes a bracket and a contact piece, one end of the bracket is provided with a terminal, and the other end is fixedly provided with a contact piece matched with the moving contact.

Preferably, the fixed end of the moving contact is fixed on the conductive rod through a knife connecting piece, and the knife connecting piece includes two fasteners fixedly matched by bolts, one of which is fixedly connected to the conductive rod.

Preferably, the free end of the moving contact is extended with an arc strike rod and a pressure equalizing ball in sequence, and the bracket of the static contact is provided with an arc strike rod matched with the arc strike rod.

Preferably, coil springs are respectively provided at both ends of the shaft, the central end of the coil spring is correspondingly fixed to the end of the shaft, and the other end is fixed to the base bracket.

Preferably, the contact piece is fixed on the bracket through a pressing plate, and a clamping spring is arranged on an adjacent surface between the contact piece and the bracket. Further, the contact piece adopts a U-shaped contact piece.

Preferably, the static contact further includes a static end closing limit device fixed on the bracket.

Further, the conductive switch knife also includes a moving end closing limit device and a moving end opening limit device respectively arranged on the base bracket; the closing limit device and the opening limit device are respectively arranged on both sides of the horizontal crank arm. At the end of the rotational stroke of the side.

Still further, when the conductive rod moves between the closing position and the opening position defined by the moving end closing limit device and the moving end opening limit device, the included angle of the movement stroke is 92-97°.

Compared with the prior art, the utility model has the following beneficial technical effects:

The utility model adopts a double-column vertical open-type conductive structure, and realizes flow through the contact between the movable contact arranged in the conductive switch blade and the contact piece arranged in the static contact, and effectively enhances the flow-through capacity; the conductive switch blade adopts one end The rotation setting method of the center of the circle, at the same time, the static contact is set on the rotation path of the moving contact to ensure the flexibility and sensitivity of the contact, and the structure is simple and reliable; the spring contact finger is installed between the conductive rod and the knife seat, and the soft connection is installed on the Between the knife seat and the conductive support, the safety and reliability of the entire structure is improved, and the flow capacity that meets the requirements is ensured; the vertical distribution of the conductive rod can be realized conveniently and quickly through the horizontal crank arm and the vertical crank arm by using the set transmission shaft. Combined, the universal bearing is used to realize the power transmission between the horizontal crank arm and the vertical crank arm whose rotation directions are perpendicular to each other, the movement is stable and reliable, the structure is simple, and the space occupied is small.

Furthermore, the installation and positioning of the moving contact is realized by using the knife connector provided by the assembly, which can not only strengthen the firmness and reliability of the connection between the two, ensure the safety and stability of the entire structure, but also facilitate and quickly assemble and Maintenance, quick and easy to use.

Further, the static contact is used to set the arc rod to be electrically connected to cooperate with the arc rod on the moving contact, which improves the arc extinguishing performance of the conductive structure and makes its operation more reliable and efficient; through the arc rod arranged on the arc rod The pressure equalizing ball can effectively improve the electric field distribution near the arc striking rod, prolong the service life and improve the reliability of use.

Further, the gravitational moment of the conductive rod can be balanced by arranging the coil spring on the shaft, so that the switching between the closing position and the opening position of the conductive knife can be easily realized, and the operation efficiency and reliability are improved.

Further, a clamping spring is arranged on the adjacent surface between the contact piece and the bracket to ensure the clamping force of the contact piece; the U-shaped contact piece can be in contact with the moving contact from both sides, the contact is reliable and stable, and the cooperation It is convenient and fast, and with the set closing position of the static end, it can limit the position of the moving contact after closing, ensuring a stable electrical connection with the static contact.

Further, by fixing the static end closing limit device on the bracket of the static contact, and fixing the moving end opening limit device and the moving end closing limit device on the conductive knife, it can ensure that the conductive rod The safety range from the closing position to the opening position will not produce over-position movement, which plays a role of safety protection.

Description of drawings

Fig. 1 is the front view of the structure described in the utility model example.

Fig. 2 is a top view of Fig. 1 .

Fig. 3 is a front view of the static contact in the example of the utility model.

Fig. 4 is a top view of Fig. 3 .

Fig. 5 is a front view of the conductive blade in the example of the present invention.

Fig. 6 is a top view of Fig. 5 .

Fig. 7 is a schematic diagram of the opening and closing state of the structure described in the example of the utility model.

In the figure: 1 is the conductive knife; 2 is the static contact; 3 is the bracket; 4 is the clamping spring; 5 is the pressure plate; 6 is the contact piece; 7 is the closing limit device of the static end; 9 is the base bracket; 10 is the opening and limiting device of the moving end; 11 is the bearing seat; 12 is the horizontal crank arm; 13 is the coil spring; 14 is the vertical crank arm; 15 is the conductive rod; 16 is the switch knife connector; 17 is a moving contact; 18 is a pressure equalizing ball; 19 is a soft connection; 20 is a moving end closing limit device; 21 is a shaft; 22 is a knife seat; 23 is a spring contact finger; 24 is an arc striker.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings, which is an explanation of the utility model rather than a limitation.

The conductive structure of the double-column vertical open type high-voltage AC isolating switch of the utility model is shown in Figure 1 and Figure 2, which includes a conductive switch knife 1 and a static contact 2; as shown in Figure 5 and Figure 6, the conductive switch knife 1 Including base bracket 9, conductive rod 15, moving contact 17 and transmission shaft; one end of base bracket 9 is provided with terminal, and the other end is fixedly provided with switch knife seat 22; one end of conductive rod 15 is provided with movable contact 17, and the other end Hinged on the knife seat 22 through the shaft 21, the upper part of the conductive rod 15 close to the hinged end is hinged with the vertical crank arm 14 in the same direction as its movement direction; the conductive rod 15 is electrically connected with the knife seat 22 through the spring contact finger 23, and the knife seat 22 passes through The soft connection 19 is electrically connected to the base bracket 9; the transmission shaft is vertically arranged on the base bracket 9 through the bearing seat 11, and the output end of the transmission shaft is connected to the horizontal crank arm 12 that rotates parallel to the surface of the base bracket 9, and the horizontal crank arm 12 The free end of the free end is connected with the free end of the vertical crank arm 14 through a universal bearing; The contact piece 6 that cooperates with the movable contact 17.

As shown in Figure 5 and Figure 6, the fixed end of the moving contact 17 in this preferred embodiment is fixed on the conductive rod 15 through the knife connecting piece 16, and the knife connecting piece 16 includes two fasteners fixed and matched by bolts, One of the fasteners is fixedly connected to the conductive rod 15 . The free end of the movable contact 17 is extended with an arc strike rod 24 and a pressure equalizing ball 18 in sequence, and the bracket 3 of the static contact 2 is provided with an arc strike rod 8 matched with the arc strike rod 24 . Both ends of the shaft 21 are respectively provided with a coil spring 13 , the central end of the coil spring 13 is correspondingly fixed on the end of the shaft 21 , and the other end is fixed on the base bracket 9 . 8. The conductive structure of the double-column vertical opening type high-voltage AC isolating switch according to claim 1 or 7,

Among them, the conductive switch blade 1 also includes a moving end closing limit device 20 and a moving end opening limit device 10 respectively arranged on the base bracket 9; the closing limit device 20 and the opening limit device 10 respectively correspond to It is arranged at the end point of the rotation stroke on both sides of the horizontal crank arm 12 . As shown in Figure 7, when the conductive rod 15 moves between the closing position and the opening position defined by the moving end closing limit device 20 and the moving end opening limit device 10, the included angle of the movement stroke is 92-97 °.

As shown in FIG. 3 and FIG. 4 , the contact piece 6 is fixed on the bracket 3 through the pressing plate 5 , and a clamping spring 4 is arranged on the adjacent surface between the contact piece 6 and the bracket 3 . In this preferred embodiment, the contact piece 6 adopts a U-shaped contact piece. The static contact 2 also includes a static end closing limit device 7 fixedly arranged on the bracket 3 .

Specifically, referring to FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 , the utility model includes a conductive switch blade 1 and a static contact 2 . Among them, the static contact 2 adopts a U-shaped contact piece 6 structure, including a bracket 3, a clamping spring 4, a pressure plate 5, a contact piece 6, a static end closing limit device 7 and an arc strike rod 8; one end of the bracket 3 is used as For connecting terminals, the other end is equipped with a contact piece 6 through the pressure plate 5; the clamping spring 4 is installed between the contact piece 6 and the bracket 3 to ensure the clamping force of the contact piece 6; the arc striker 8 is installed on the side of the bracket 3.

Referring to Figures 5 and 6, the conductive switch knife 2 adopts a vertical open structure, including a base bracket 9, a moving end opening and limiting device 10, a bearing seat 11, a horizontal crank arm 12, a coil spring 13, a vertical crank arm 14, Conductive rod 15, switch knife connector 16, moving contact 17, pressure equalizing ball 18, soft connection 19, moving end closing limit device 20, shaft 21, switch knife seat 22 and spring contact finger 23; the base bracket One end of 9 is used as a connection terminal, and a bearing seat 11, an opening limit 10 and a closing limit 20 are installed on the base support 9; the horizontal crank arm 12 is installed on the bearing seat 11; At the other end, the coil spring 14 is installed on both sides of the shaft 21; the conductive knife seat 22 is installed in the middle of the shaft 21, and the soft connection 19 is installed between the knife seat 22 and the base bracket 9; one end of the conductive rod 15 Installed on the knife seat 22, the other end is equipped with a knife tip 16; a spring contact finger 23 is installed between the conductive rod 15 and the knife seat 22; the moving contact 17 is installed on the knife connector 16; arc striking The rod 24 is installed on the moving contact 17; the pressure equalizing ball 18 is installed on the arc striking rod 24.

The working principle of the conductive structure of the present utility model, as shown in Figure 7, when the isolating switch is closed, the conductive switch knife 1 is transferred from the opening position to the closing position along the closing direction; as shown in Figure 6, the power source passes through The transmission shaft drives the horizontal crank arm 12 to rotate counterclockwise, as shown in Figure 5 and Figure 7, the vertical crank arm 14 moves clockwise under the transmission of the horizontal crank arm 12, and passes through the closing limit device 20 of the moving end and the static locking device respectively. The limit of the terminal closing limit device 7 realizes the electrical contact conduction between the movable contact 17 and the contact piece 6; as shown in Figure 7, when the isolating switch is opened, the conductive knife 1 moves from the closing The position is transferred to the opening position, the transmission process is opposite to the closing process, and finally the movement is stopped after the electrical contact between the moving contact 17 and the contact piece 6 is disconnected through the limit of the opening limit device 10 at the moving end. When the switch is closed, the arc strike rod 24 and the arc strike rod 8 are in contact before the movable contact 17 and the U-shaped contact piece 6 are in contact. The reliable contact of the arc striking rod 23 is used to realize the arc extinguishing, so that the moving contact 17 and the U-shaped contact piece 6 can be effectively protected.

Claims (9)

1. the conductive structure of twin columns vertical opening type high-voltage alternating current isolating switch, is characterized in that, comprises conduction plug-in strip (1) and fixed contact (2);

Described conduction plug-in strip (1) comprises base seat support (9), conducting rod (15), moving contact (17) and power transmission shaft; One end of base seat support (9) arranges binding post, and the other end is fixedly installed blade base (22); One end of conducting rod (15) arranges moving contact (17), the other end is hinged on blade base (22) by axle (21), and conducting rod (15) is near the top vertical connecting lever (14) hinged in the same way with its direction of motion of hinged end; Conducting rod (15) is electrically connected with blade base (22) by spring touch finger (23), and blade base (22) is electrically connected with base seat support (9) by be flexible coupling (19); Power transmission shaft is vertically set on base seat support (9) by bearing pedestal (11), the output of power transmission shaft connects the horizontal connecting lever (12) being parallel to base seat support (9) surface pivots, and the free end of horizontal connecting lever (12) is connected by the free end of universal bearing with vertical connecting lever (14);

Described fixed contact (2) comprises support (3) and contact (6), and support (3) one end arranges binding post, and the other end is fixedly installed the contact (6) coordinated with moving contact (17).

2. the conductive structure of twin columns vertical opening type high-voltage alternating current isolating switch according to claim 1, it is characterized in that, moving contact (17) stiff end is fixed on conducting rod (15) by plug-in strip connector (16), plug-in strip connector (16) comprises the securing member that two are bolted cooperation, and one of them securing member is fixedly connected with conducting rod (15).

3. the conductive structure of twin columns vertical opening type high-voltage alternating current isolating switch according to claim 1, it is characterized in that, the free end extension of moving contact (17) is disposed with arc ignition bar (24) and voltage equalizing ball (18), the support (3) of fixed contact (2) is provided with the starting rod (8) coordinated with arc ignition bar (24).

4. the conductive structure of twin columns vertical opening type high-voltage alternating current isolating switch according to claim 1, it is characterized in that, the two ends of axle (21) are respectively arranged with disc spring (13), the center-side correspondence of disc spring (13) is fixed on the end of axle (21), and the other end is fixed on base seat support (9).

5. the conductive structure of twin columns vertical opening type high-voltage alternating current isolating switch according to claim 1, it is characterized in that, contact (6) is fixed on support (3) by pressing plate (5), the adjacent surface between contact (6) and support (3) is arranged fastening spring (4).

6. the conductive structure of twin columns vertical opening type high-voltage alternating current isolating switch according to claim 1 or 5, it is characterized in that, described contact (6) adopts U-shaped contact.

7. the conductive structure of twin columns vertical opening type high-voltage alternating current isolating switch according to claim 1, it is characterized in that, described fixed contact (2) also comprises the quiet end combined floodgate stopping means (7) be fixedly installed on support (3).

8. the conductive structure of the twin columns vertical opening type high-voltage alternating current isolating switch according to claim 1 or 7, it is characterized in that, described conduction plug-in strip (1) also comprises and is separately positioned on moved end combined floodgate stopping means (20) on base seat support (9) and moved end opening limit device (10); Combined floodgate stopping means (20) and opening limit device (10) respectively correspondence are arranged on the rotational travel destination county of horizontal connecting lever (12) both sides.

9. the conductive structure of twin columns vertical opening type high-voltage alternating current isolating switch according to claim 8, it is characterized in that, when moving between the closing position place that conducting rod (15) limits in moved end combined floodgate stopping means (20) and moved end opening limit device (10) and open position, the angle of movement travel is 92-97 °.