CN204178996U - The conductive structure of three-column type high voltage alternating current isolating switch - Google Patents

Abstract

The conductive structure of the three-column high-voltage AC isolating switch of the utility model includes a static contact and a conductive knife; the conductive knife is rotated with the midpoint as the center of the circle, and includes movable contacts respectively arranged at both ends; the static contact includes Insulating plate, connecting terminal, bracket, and the contact piece matched with the moving contact; the connecting terminal fixedly connected with the sleeve is fixedly arranged on the insulating plate, the sleeve is rotatably connected with the support in the radial direction, and the contact piece is installed at one end of the support , and the other end is electrically connected to the wiring terminal through a soft connection; two static contacts are symmetrically arranged on the rotation path of the moving contact and respectively matched with the moving contact. Through the rotating setting of the conductive knife, the contact between the movable contact at both ends of the conductive knife and the contact piece set in the static contact is used to realize the flow, which effectively enhances the flow capacity, and the assembly is also simple, and the cost of the product is reduced. Contact flexibility and sensitivity, simple and reliable structure, meet the required flow capacity.

Description

Conductive structure of three-column high-voltage AC isolating switch

technical field

The utility model belongs to the field of high-voltage equipment, in particular to a conductive structure of a three-column 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 three-column high-voltage AC isolation switch adopt a flip structure, and the flip structure uses gear rotation. The product has many transmission links, the transmission structure is relatively complicated, and the cost is relatively high.

Utility model content

Aiming at the problems existing in the prior art, the utility model provides a conductive structure of a three-column 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 three-column high-voltage AC isolating switch includes static contacts and conductive blades; the conductive blades are rotated with the midpoint as the center of the circle, and include movable contacts respectively arranged at both ends; the static contacts include insulating plates, Terminals, brackets, and contacts that match with the moving contacts; the terminals that are fixedly connected to the sleeve are fixed on the insulating plate, and the sleeve is rotatably connected to the bracket in the radial direction. One end of the bracket is equipped with a contact piece, and the other end It is electrically connected with the wiring terminal through a flexible connection; two static contacts are arranged symmetrically on the rotation path of the moving contact, respectively matching with the moving contact.

Preferably, the conductive switch blade further includes a rotating support and a conductive tube; the movable contacts are respectively fixedly connected to both ends of the conductive tube, and the middle of the conductive tube is fixed on the rotating support.

Further, the middle of the conductive tube is fixed on the upper end of the cushion block through U-shaped bolts, and the cushion block is fixedly arranged on the rotating support; the moving contact is fixedly connected to the conductive tube through support frames fixed at both ends of the conductive tube.

Preferably, the static contact further includes an arc strike rod arranged above the bracket; the arc strike rod is electrically connected to the contact piece; and the arc strike rod matched with the arc strike rod is arranged on the moving contact.

Preferably, a cover is arranged above the support, and the cover is fixedly connected to the support through a connecting column fixed on the support.

Preferably, the static contact further includes a return spring whose two ends are respectively installed on the connection terminal and the bracket, and a clamping spring whose two ends are respectively installed on the adjacent surface between the contact piece and the bracket.

Further, the contact piece is a U-shaped contact piece.

Preferably, the static contact further includes a closing limit device and an opening limit device respectively arranged on both sides of the bracket; the closing limit device is fixedly arranged on the insulating plate, and the opening limit device is fixedly arranged on the on the terminal block.

Preferably, when the bracket and the contact piece rotate to the opening position defined by the opening limit device, the deflection angle of the bracket and the contact piece is 55-60°.

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

The utility model replaces the original aluminum tube and the flip bracket assembly structure by rotating the conductive switch knife, and realizes the flow through the contact between the movable contact set at both ends of the conductive switch knife and the contact piece set in the static contact. The flow capacity is effectively enhanced, the assembly is also simple, and the cost of the product is reduced; the conductive knife adopts a rotation setting method centered on the midpoint, and the static contact is symmetrically arranged on the rotation path of the two moving contacts to ensure The flexibility and sensitivity of the contact, the structure is simple and reliable; the terminal of the static contact is connected to the bracket with the contact piece through the sleeve connected to it, which improves the safety and reliability of the entire structure and ensures the required flow capacity.

Further, the conductive switch knife used also includes a conductive tube fixed on the rotating support in the middle, and the rotating support can conveniently drive the conductive tube to rotate, thereby making the moving contacts fixedly connected to both ends of the conductive tube move, improving flexibility , and a reasonable design can ensure the contact effect between the moving contact and the contact piece, increasing reliability.

Further, the conductive tube is fixedly connected to the rotary support through the spacer fixed on the rotary support, which can ensure that the conductive tube is more stable when it is in contact with the rotating support, making it more firmly connected to the rotary support, simplifying the Fixed installation is convenient for equipment maintenance and improves the service life at the same time; at the same time, support frames are set at both ends of the conductive tube, so that the moving contact and the conductive tube are connected through the support frame, making the connection between them firm and reliable, ensuring the safety of the entire structure stable performance.

Furthermore, the static contact is provided with an arc striking rod and the contact piece is electrically connected to cooperate with the arc striking rod on the moving contact, which improves the arc extinguishing performance of the conductive structure and makes its operation more reliable and efficient.

Further, by setting the connecting column on the bracket to fix the cover, the damage to the internal structure of the static contact can be effectively avoided, the service life is prolonged, and it is safer.

Further, by setting a return spring between the terminal and the bracket, the switch between the closing limit and the opening limit can be conveniently realized; at the same time, a clamping spring is set on the adjacent surface between the contact piece and the bracket, The clamping force of the contacts is guaranteed.

Further, the contact piece adopts a U-shaped contact piece, which can be in contact with the moving contact from both sides, the contact is reliable and stable, and the cooperation is convenient and fast.

Further, by fixing the closing limit device on the insulating plate of the static contact, and the opening limit device on the terminal of the static contact, it can ensure that the conductive rod can move from the closing position to the opening position. The safety range of time will not produce excessive movement, which plays a role of safety protection.

Further, the deflection angle between the bracket and the contact piece at the opening limit position defined by the opening limit device is set at 55-60° to ensure the separation of the moving contact and the contact piece and increase reliability.

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 static contact; 2 is the conductive knife; 3 is the terminal; 4 is the cover; 5 is the bracket; 6 is the arc rod; 7 is the contact piece; 8 is the closing limit; 9 is the soft connection ; 10 is an opening limit; 11 is an insulating plate; 12 is a return spring; 13 is a fixing screw; 14 is a connecting column; 15 is a clamping spring; 16 is a shaft sleeve; 17 is an arc striking rod; 18 is a support frame; 19 is a conductive tube; 20 is a U-shaped bolt; 21 is a rotating support; 22 is a pad; 23 is an arc striker.

Detailed ways

The utility model will be described in further 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 three-column high-voltage AC isolating switch of the present utility model, as shown in Figure 1, includes a static contact 1 and a conductive switch knife 2; The moving contact 17 at the end; as shown in Figure 3 and Figure 4, the static contact 1 includes an insulating plate 11, a terminal 3, a bracket 5, and a contact piece 7 that cooperates with the moving contact 17; the shaft sleeve 16 is fixedly connected The connecting terminal 3 is fixedly arranged on the insulating plate 11, and the bushing 16 is rotatably connected with the bracket 5 in the radial direction. One end of the bracket 5 is equipped with a contact piece 7, and the other end is electrically connected with the connecting terminal 3 through a flexible connection 9; as shown in Fig. 1 and As shown in FIG. 2 , two static contacts 1 are arranged symmetrically on the rotation path of the movable contact 17 respectively to cooperate with the movable contact 17 .

As shown in FIG. 5 and FIG. 6 , the conductive switch blade 2 also includes a rotating support 21 and a conductive tube 19 ; The middle of the conductive pipe 19 is fixed on the upper end of the pad 22 by the U-shaped bolt 20, and the pad 22 is fixedly arranged on the rotating support 21;

Wherein, as shown in Fig. 5 and Fig. 6, the static contact 1 also includes an arc-leading rod 6 arranged above the support 5; the arc-leading rod 6 is electrically connected with the contact piece 7; The arc striking rod 23. A cover 4 is also arranged above the bracket 5 , and the cover 4 is fixedly connected to the bracket 5 through a connecting column 14 fixed on the bracket 5 .

As shown in Figures 3 and 4, the static contact 1 also includes a return spring 12 with two ends installed on the terminal 3 and the bracket 5 respectively, and a clamping spring 12 installed at both ends on the adjacent surface between the contact piece 7 and the bracket 5. spring 15. The contact piece 7 adopts a U-shaped contact piece. As shown in FIG. 3 , several U-shaped contact pieces are superimposed and used. This preferred example is described by superimposing six U-shaped contact pieces as an example. The static contact 1 also includes a closing limit device 8 and an opening limit device 10 respectively arranged on both sides of the bracket 5; the closing limit device 8 is fixedly arranged on the insulating plate 11, and the opening limit device 10 is fixedly arranged On terminal 3. As shown in Figure 7, when the bracket 5 and the contact piece 7 rotate to the opening position defined by the opening limit device 10, the deflection angle of the bracket 5 and the contact piece 7 is 55-60°, and this preferred example is 57°. Example to illustrate.

Specifically, referring to FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 , the utility model includes a static contact 1 and a conductive switch blade 2 . Among them, the static contact 1 adopts a U-shaped contact piece structure, mainly including terminal 3, cover 4, bracket 5, arc striker 6, contact piece 7, closing limit 8, soft connection 9, opening limit 10, insulation Plate 11, return spring 12, fixing screw 13, connecting column 14; clamping spring 15; wherein the terminal 1 is fixed on the insulating plate 11, and is connected with the bracket 5 through the bushing 16; one end of the bracket 5 is equipped with a contact piece 7, and the other One end is connected to terminal 3 through soft connection 9; cover 4 is installed above bracket 5; arc strike rod 6 is also installed above bracket 5; closing limit 8 is installed on insulating plate 11; On the insulating plate 11; the return spring 12 is installed between the insulating plate 11 and the support 5 through the fixing screw 13; the clamping spring 15 is installed between the contact piece 7 and the support 5 to ensure the clamping force of the contact piece 7.

Referring to Figure 5 and Figure 6, the conductive switch knife 2 adopts a rotary structure, mainly including a movable contact 17, a bracket 18, a conductive tube 19, a U-shaped bolt 20, a support 21, a spacer 22, and an arc striker 23; After the two sides of the tube 19 are welded with the support frame 18, the moving contact 17 is installed; in the middle of the conductive tube 19, a U-bolt 20 and a spacer 22 are arranged to fix it on the support 21. As shown in Figure 5 and Figure 6, in this preferred example, the movable contact 17 is bent into a U-shape with a flat bottom by using a conductive plate, and the two ends are respectively welded on the bracket 18, and the front ends are respectively provided with the arc rod 6. Arc striking rod 23 is used to protect it.

The working principle of the conductive structure of the present utility model is 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, and the closing is realized by driving the static contact 2 to rotate. Brake; when the isolating switch is opened, the conductive knife 1 moves from the closing position to the opening position along the opening direction, and the opening is realized by driving the static contact 2 to rotate. When the movable contact 17 and the static contact 2 are electrically connected and contacted, the electrical conduction is realized through reliable contact between the contact 17 and the U-shaped contact piece 7 . The arc strike rod 6 and the arc strike rod 23 are in contact before the contact 17 and the U-shaped contact piece 7. In the case of a bus transfer condition, the busbar transfer current can be reliably passed through the arc strike rod 6 and the arc strike rod 23. Contact to achieve conduction, so that the contact 17 and the U-shaped contact piece 7 can be effectively protected.

Claims (9)

1. The conductive structure of the three-column high-voltage AC isolating switch is characterized in that it includes a static contact (1) and a conductive knife (2); the conductive knife (2) is rotated with the midpoint as the center of the circle, It includes moving contacts (17) respectively arranged at both ends; the static contact (1) includes an insulating plate (11), a connecting terminal (3), a bracket (5), and a joint with the moving contact (17) the contact piece (7); the connection terminal (3) that is fixedly connected with the axle sleeve (16) is fixedly arranged on the insulating plate (11), and the axle sleeve (16) is rotatably connected with the support (5) in the radial direction, and the support (5) ) is installed with a contact piece (7), and the other end is electrically connected to the terminal (3) through a flexible connection (9); two symmetrically arranged on the rotation path of the moving contact (17) are respectively connected to the moving contact ( 17) Cooperating static contact (1). 2. The conductive structure of the three-column high-voltage AC isolating switch according to claim 1, characterized in that the conductive knife (2) also includes a rotating support (21) and a conductive tube (19); the moving contact (17 ) are respectively fixedly connected to the two ends of the conductive pipe (19), and the middle of the conductive pipe (19) is fixed on the rotating support (21). 3. The conductive structure of the three-column high-voltage AC isolating switch according to claim 2, characterized in that, the middle of the conductive pipe (19) is fixed on the upper end of the spacer (22) by a U-shaped bolt (20), and the spacer (22) ) is fixedly arranged on the rotating support (21); the moving contact (17) is fixedly connected with the conductive tube (19) through the support frames (18) fixed at both ends of the conductive tube (19). 4. The conductive structure of the three-column high-voltage AC isolating switch according to claim 1, wherein the static contact (1) further includes an arc striker (6) arranged above the bracket (5); The arc striking rod (6) is electrically connected with the contact piece (7); the moving contact (17) is provided with an arc striking rod (23) matched with the arc striking rod (6). 5. The conductive structure of the three-column high-voltage AC isolating switch according to claim 1 or 4, characterized in that a cover (4) is arranged above the support (5), and the cover (4) is fixed on the support The connecting column (14) on (5) is fixedly connected with the support (5). 6. The conductive structure of the three-column high-voltage AC isolating switch according to claim 1, wherein the static contact (1) also includes two ends installed on the terminal (3) and the bracket (5) respectively. The back-moving spring (12) on the top, the clamping spring (15) that two ends are respectively installed on the contact piece (7) and the clamping spring (15) on the adjacent surface between the support (5). 7. The conductive structure of the three-column high-voltage AC isolating switch according to claim 1 or 6, characterized in that the contact piece (7) is a U-shaped contact piece. 8. The conductive structure of the three-column high-voltage AC isolating switch according to claim 1, characterized in that the static contact (1) also includes closing and limiting devices respectively arranged on both sides of the bracket (5) (8) and the opening limit device (10); the closing limit device (8) is fixedly arranged on the insulating plate (11), and the opening limit device (10) is fixedly arranged on the connection terminal (3). 9. The conductive structure of the three-column high voltage AC isolating switch according to claim 1, characterized in that the bracket (5) and the contact piece (7) rotate to the opening position defined by the opening limit device (10) , the deflection angle of the support (5) and the contact piece (7) is 55-60°.