CN114783825A - Three-phase column type vacuum circuit breaker - Google Patents

Abstract

The invention discloses a three-phase column-type vacuum circuit breaker, comprising a mechanism box, three solid-sealed poles and three operating mechanisms, each operating mechanism includes a permanent magnet device and an opening spring. A drive spindle is arranged in the arrangement direction of the mechanism. The drive spindle is synchronously connected with the three insulating pull rods through a linkage structure. One end of the drive spindle is fixed with a transmission arm. The outside of the mechanism box is equipped with an opening handle, which is inside the mechanism box. A driving part is provided, the transmission arm is on the rotation path of the driving part, and when the opening handle is opened and rotated, the driving part abuts the transmission arm to drive the driving spindle to rotate. The structure of the vacuum circuit breaker of the present invention has been optimized and designed. A driving main shaft and a suitable opening handle are arranged in the mechanism box. Through the synchronous linkage between the driving main shaft and the three operating mechanisms, the manual opening operation is convenient and reliable, and has excellent performance. practicability and generalizability.

Description

A three-phase column vacuum circuit breaker

technical field

The invention relates to a three-phase column type vacuum circuit breaker, which belongs to the technical field of vacuum circuit breaker structure design.

Background technique

Outdoor vacuum circuit breaker is a circuit breaker installed and used outdoors, usually installed on a pole tower. Vacuum circuit breakers are widely used in high-voltage power transmission and distribution systems as switching devices that control the breaking of high-voltage lines. There is usually only one permanent magnet device (such as the structure disclosed in the patent document CN202905591U) in the permanent magnet operating mechanism of the traditional three-phase column vacuum circuit breaker. The gate is driven by the elastic force released by the opening spring to control the three-phase synchronous opening of the vacuum circuit breaker. In order to realize the manual opening in an emergency state, the vacuum circuit breaker is also equipped with a manual opening mechanism. However, it is difficult to directly match the manual opening mechanism currently used in the three-phase vacuum circuit breaker in the permanent magnet operating mechanism including three permanent magnet devices, so it is necessary to design an applicable manual opening structure.

SUMMARY OF THE INVENTION

In view of the problems pointed out in the background art, the present invention provides a three-phase column-type vacuum circuit breaker with reasonable structure optimization.

The technical scheme that realizes the object of the present invention is:

A three-phase column-type vacuum circuit breaker comprises a mechanism box, three solid-sealed poles fixed on the mechanism box, and an operating mechanism installed in the mechanism box. The operating mechanism is set to three, And the movable contacts on the vacuum arc extinguishing chambers in each solid-sealed pole are correspondingly connected through an insulating pull rod, and each operating mechanism includes a permanent magnet device and an opening spring. When the permanent magnet device is energized, the insulating pull rod is driven to control the vacuum arc extinguishing. When the permanent magnet device is powered off, the opening spring drives the insulating rod to control the opening of the vacuum interrupter. A drive spindle is arranged in the mechanism box along the arrangement direction of the three operating mechanisms. The three insulating pull rods are synchronously linked and connected, one end of the drive main shaft is fixed with a transmission arm, the outside of the mechanism box is equipped with an opening handle, and the inside of the mechanism box is equipped with a switch that is linked with the opening handle. A driving member, the transmission arm is on the rotation path of the driving member, and the drive shaft is driven to rotate by the driving member abutting the transmission arm when the opening handle is opened and rotated.

In the above solution, a return spring is also included, under the action of the return spring, the opening handle is in an initial position, and the driving member does not block the rotation of the transmission arm in this state.

In the above solution, the mechanism box is rotatably equipped with a rotating shaft, and the driving member and the opening handle are respectively fixed on the inner and outer ends of the rotating shaft; the driving member includes a fixed block fixedly connected with the rotating shaft and The drive shaft is fixed on the fixing block, a limiting column is fixed on the inner wall of the mechanism box, and the fixing block abuts on the limiting column when the opening handle is in the initial position.

In the above solution, the return spring is a tension spring, which is connected between the fixing block and the tension spring hook, and the tension spring hook is fixed on the mechanism box.

In the above solution, a connecting block is connected to the bottom end of each insulating pull rod, and the connecting block is fixed on the moving iron core of the permanent magnet device, and a connecting arm is fixed at the position corresponding to each connecting block on the driving spindle. The connection block is provided with a connection slot, the connection arm is provided with a connection arm, and the connection slot and the connection arm are inserted and matched to form the linkage structure.

In the above solution, each connection block is provided with a plurality of connection slots at intervals, and a rib plate is formed between adjacent connection slots, the number of the connection arms is equal to the number of the connection slots, and the plurality of connection arms are equal to the number of the connection slots. Each connection slot is plugged in one-to-one correspondence.

The present invention has positive effects: in the three-phase column type vacuum circuit breaker of the present invention, by arranging a driving main shaft in the mechanism box and configuring a suitable opening handle, the three-phase realization is realized through the connection between the driving main shaft and the three operating mechanisms The action is synchronized, and the opening handle is rotated to drive the driving spindle to rotate and drive the insulating rods in the three operating mechanisms to open the brake. It is used in vacuum circuit breakers, which has good practicability and generalizability.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the vacuum circuit breaker in the present invention;

2 is a schematic structural diagram of the vacuum circuit breaker in the present invention after omitting the mechanism box and the solid-sealing pole;

Fig. 3 is the partial structure schematic diagram of the three-phase column type vacuum circuit breaker in the present invention;

FIG. 4 is a schematic three-dimensional structure diagram of the opening handle, the driving part and the rotating shaft in the present invention when they are matched and connected;

Fig. 5 is the three-dimensional structure schematic diagram of the transmission arm in the present invention;

FIG. 6 is a schematic three-dimensional structure diagram of a connecting block in the present invention.

The reference signs shown in the figure are: 1-mechanism box; 11-limiting column; 12-tension spring hook; 2-solid sealing pole; 3-operating mechanism; 31-permanent magnet device; 32-opening spring ;4-insulation rod; 41-connection block; 411-connection slot; 5-drive spindle; 51-transmission crank arm; 52-connection crank arm; 521-connection arm; 6-opening handle; 7-drive part; 71-fixed block; 72-drive shaft; 8-return spring; 9-rotation shaft.

Detailed ways

The specific structure in the present invention is described below in conjunction with the accompanying drawings:

A three-phase column type vacuum circuit breaker, as shown in Figures 1 to 6, includes a mechanism box 1, three solid-sealed poles 2 fixed on the mechanism box 1, and a mechanism box mounted on the mechanism box. The operating mechanisms 3 in the body 1 are set to three, and are respectively connected to the moving contacts on the vacuum interrupter in each solid-sealed pole 2 through an insulating pull rod 4, and each operating mechanism 3 includes a permanent magnet device. 31 and the opening spring 32, when the permanent magnet device 31 is energized, it drives the moving iron core to move and then drives the insulating pull rod 4 to control the closing of the vacuum interrupter. When the permanent magnet device 31 is powered off, the opening spring 32 drives the insulating pull rod 4 to control The vacuum interrupter is switched off, and the mechanism box 1 is provided with a drive spindle 5 along the arrangement direction of the three operating mechanisms 3. The drive spindle 5 is synchronously connected with the three insulating pull rods 4 through a linkage structure. The drive spindle One end of 5 is fixed with a transmission arm 51, an opening handle 6 is arranged outside the mechanism box 1, and a driving member 7 linked with the opening handle 6 is arranged inside the mechanism box 1. The transmission arm 51 is located on the rotation path of the driving member 7. When the opening handle 6 is opened and rotated, the driving member 7 abuts against the transmission arm 51 to drive the driving spindle 5 to rotate; For the three-phase column type vacuum circuit breaker, a driving spindle 5 is arranged in the mechanism box 1, and the driving spindle 5 is linked with the insulating rods 4 in the three operating mechanisms 3 by setting the linkage structure, and the corresponding structure is configured. According to the structure of the opening handle, when manual opening is required, the opening handle 6 is manually driven to rotate in the direction of opening, and then the drive shaft 5 is driven to rotate by the driving member 7 linked with the opening handle 6 abutting against the transmission arm 51. During the rotation of the driving spindle 5, a downward driving force is generated on the insulating rod 4, so that the insulating rod 4 drives the moving contact in the vacuum interrupter to move downward and separate from the static contact, thereby driving the three vacuum interrupters to open synchronously. In addition, when an operating mechanism 3 fails in actual use, due to the associated action of the driving spindle 5, the three-phase vacuum circuit breaker can still be driven to work when the other two operating mechanisms 3 are in normal operation. Therefore, in this embodiment The manual opening structure design is more suitable for the use of three-phase vacuum circuit breakers, and has good practicability.

In order to enable the opening handle 6 to automatically rotate and return to its original position when the manual opening operation is completed, a return spring 8 is also provided in this embodiment. Under the action of the return spring 8, the opening handle 6 is in the initial position, and in this state The lower driving member 7 does not block the rotation of the transmission arm 51, that is, when the opening handle 6 is in the initial position, the driving member 7 will not interfere with the normal operation of the operating mechanism in the three-phase vacuum circuit breaker. The opening handle 6 is rotated and the reset spring 8 is charged in the process. After the manual opening is completed, the opening handle 6 is released, and the reset spring 8 releases the stored energy to drive the opening handle 6 to rotate and reset to the initial position. The opening handle 6 can be reset manually without the reset spring 8 .

As a further preferred solution of this embodiment, as shown in FIG. 3 , a rotating shaft 9 is rotatably mounted on the mechanism box 1 , and the driving member 7 and the opening handle 6 are respectively fixed on the inside and outside of the rotating shaft 9 At both ends, the synchronous rotation linkage between the driving member 7 and the opening handle 6 is realized through the rotating shaft 9, and bearings can be arranged between the rotating shaft 9 and the mechanism box 1 to ensure the flexibility of rotation; the driving member 7 includes and rotates The fixed block 71 connected to the shaft 9 and the drive shaft 72 fixed to the fixed block 71, the limit post 11 is fixed on the inner wall of the mechanism box 1, and the opening handle 6 is in the initial position. The connecting block 71 abuts on the limiting post 11 , so as to prevent and limit the opening handle 6 when it is in the initial position.

As a specific solution in the above embodiment, the return spring 8 in this embodiment adopts a tension spring, and the tension spring is connected between the fixing block 71 and the tension spring hook 12 , and the tension spring hook 12 It is fixed on the mechanism box 1, and the tension spring is suspended and installed in this way.

In a preferred solution of this embodiment, as shown in FIGS. 5 to 6 , a connecting block 41 is connected to the bottom end of each insulating pull rod 4 , and the connecting block 41 is fixed on the moving iron core of the permanent magnet device 31 , so A connecting arm 52 is fixed on the drive spindle 5 at a position corresponding to each connecting block 41 , the connecting block 41 is provided with a connecting slot 411 , and the connecting arm 52 is provided with a connecting arm 521 . The slot 411 and the connecting arm 521 are inserted and matched to form the linkage structure; in this solution, the connecting arm 52 is connected with the connecting slot 411 by inserting and matching, so as to associate the rotation of the driving spindle 5 with the up and down movement of the insulating rod 4 .

In a further preferred solution of this embodiment, as shown in FIG. 5 to FIG. 6 , in this embodiment, each connecting block 41 is provided with a plurality of connecting slots 411 at intervals, and rib plates are formed between adjacent connecting slots 411, so The number of the connecting arms 521 is equal to the number of the connecting slots 411 , and the plurality of connecting arms 521 are connected to the plurality of connecting slots 411 in one-to-one correspondence, and the plurality of connecting slots 411 are connected to the plurality of connecting arms 52 through the above-mentioned plurality of connecting slots 411 The one-to-one matching of plug-in joints makes the connection reliable and effective, and can bear greater force, and the existence of the rib ensures the strength of the connecting block 41 .

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And these obvious changes or changes derived from the essential spirit of the present invention still belong to the protection scope of the present invention.

Claims (6)

1. A three-phase column type vacuum circuit breaker, comprising a mechanism box (1), three solid-sealed poles (2) fixed on the mechanism box (1), and a mechanism box mounted on the mechanism box (2) There are three operating mechanisms (3) in (1), and three operating mechanisms (3) are respectively connected to the moving contacts on the vacuum interrupter in each solid-sealed pole (2) through an insulating pull rod (4). , each operating mechanism (3) includes a permanent magnet device (31) and an opening spring (32). When the device (31) is powered off, the opening spring (32) drives the insulating rod (4) to control the opening of the vacuum interrupter. A drive spindle (5) is provided, the drive spindle (5) is synchronously connected with three insulating pull rods (4) through a linkage structure, and a transmission arm (51) is fixed at one end of the drive spindle (5). An opening handle (6) is provided outside the mechanism box (1), and a driving member (7) linked with the opening handle (6) is arranged inside the mechanism box (1). (51) is located on the rotation path of the driving member (7), when the opening handle (6) is opened and rotated, the driving member (7) abuts against the transmission arm (51) to drive the driving spindle (5) ) turn. 2 . The three-phase column type vacuum circuit breaker according to claim 1 , further comprising a return spring ( 8 ), and the opening handle ( 6 ) is in an initial position under the action of the return spring ( 8 ). 3 . , in this state, the driving member (7) does not block the rotation of the transmission arm (51). 3. The three-phase column type vacuum circuit breaker according to claim 2, characterized in that, a rotating shaft (9) is rotatably mounted on the mechanism box (1), and the driving member (7) and the opening The handle (6) is respectively fixed on the inner and outer ends of the rotating shaft (9); the driving member (7) includes a fixing block (71) fixedly connected with the rotating shaft (9) and a fixing block (71) fixed on the fixing block (71). ), the limit post (11) is fixed on the inner wall of the mechanism box (1), and when the opening handle (6) is in the initial position, the fixing block (71) abuts against the on the limit post (11). 4 . The three-phase column type vacuum circuit breaker according to claim 3 , wherein the return spring ( 8 ) is a tension spring, which is connected between the fixing block ( 71 ) and the tension spring hook ( 12 ). 5 . During this time, the tension spring hook (12) is fixed on the mechanism box (1). 5 . The three-phase column type vacuum circuit breaker according to claim 3 , wherein a connecting block ( 41 ) is connected to the bottom end of each insulating pull rod ( 4 ), and the connecting block ( 41 ) is fixed to the permanent magnet device. 6 . On the moving iron core of (31), a connecting arm (52) is fixed at the position corresponding to each connecting block (41) on the driving spindle (5), and the connecting block (41) is provided with a connecting slot ( 411), the connecting arm (52) is provided with a connecting arm (521), and the connecting slot (411) is inserted and matched with the connecting arm (521) to form the linkage structure. 6 . The three-phase column-type vacuum circuit breaker according to claim 5 , wherein a plurality of connection slots ( 411 ) are provided at intervals on each connection block ( 41 ), and between adjacent connection slots ( 411 ) Ribs are formed, the number of the connecting arms (521) is equal to the number of the connecting slots (411), and the plurality of connecting arms (521) are inserted into the plurality of connecting slots (411) in one-to-one correspondence.

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