A new type of conductive structure for GW4-12 type isolating switch

Abstract

The utility model discloses a novel conductive structure for GW4 12 -type isolator, relates to electric power system application equipment field, has designed the conductive seat of integrated moulding by aluminium profile, can guarantee reliable current, is more favorable to heat dissipation, the terminal, the post is the integrated moulding structure, avoids the loop loss caused because of the mutual contact of spare part, adds the insulating composite axle sleeve between the post and the conductive seat simultaneously, reduces the shunt of conductive seat, and loop resistance becomes small, guarantees the stability of switch long time operation, the connection mode of terminal post and conductive seat adopts the snap spring connection, reduces the card stagnation of switch terminal, has simplified the conductive loop structure, reduces the use of electric connection component, and the stability of switch operation is greatly improved, the both sides of conductive seat are provided with bird shield, prevents the risk such as equipment short circuit caused by the bird nest.

Description

Technical Field

[0001] This utility model relates to the field of power system application equipment, specifically a novel conductive structure for a GW4-12 type disconnecting switch. Background Technology

[0002] Disconnect switches, generally referring to high-voltage disconnect switches, are mainly used in outdoor AC 10-40.5kV, 50HZ power systems for switching energized high-voltage lines and isolating energized high-voltage lines from the high-voltage busbars or circuit breakers under maintenance. A key characteristic of disconnect switches is their lack of arc-extinguishing capability; they can only open and close circuits when there is no load current. These products are widely used in power, railway, mining, and oil field industries. While their working principle and structure are relatively simple, their widespread use and high reliability requirements significantly impact the design, construction, and safe operation of substations and power plants.

[0003] The existing conductive structure of high-voltage disconnect switches has the following shortcomings:

[0004] 1. The main conductive circuit has a complex structure, many electrical connection components, and a small internal space for the conductive base, which is not conducive to heat dissipation during long-term operation.

[0005] 2. The tightness of the connections between components increases the risk of loop losses;

[0006] 3. The presence of voids inside the casting results in a relatively high circuit resistance for the entire high-voltage disconnect switch. Summary of the Invention

[0007] To address the aforementioned technical problems, this utility model provides a novel conductive structure for the GW4-12 disconnector switch, which simplifies the main conductive circuit, reduces circuit losses, reduces circuit resistance by changing the material, and facilitates rapid heat dissipation during long-term operation.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A novel conductive structure for a GW4-12 type disconnecting switch includes left and right conductive parts with identical structures. The left conductive part is connected to a contact finger, and the right conductive part is connected to a contact head. The novel conductive structure includes a conductive base, a terminal block, and a flexible connector. The terminal block is integrally formed and connected to the flexible connector by bolts through a composite bushing. The flexible connector is connected to the conductive base by bolts. The terminal block is connected to the conductive base by a retaining ring through a composite bushing. The conductive base is formed from aluminum profile.

[0010] A stainless steel plate is installed and fixedly connected between the conductive base and the post insulator.

[0011] Bird guards are provided on both the left and right sides of the conductive base.

[0012] The contact areas where the contacts and fingers mesh are all plated with silver.

[0013] This invention simplifies the conductive circuit structure, reduces the number of electrical connection components, and features a conductive base integrally molded from aluminum profiles. This design boasts high density, high strength, and low resistance, ensuring reliable current flow and facilitating heat dissipation. The terminals and posts are integrally molded, providing high mechanical strength and preventing circuit losses caused by component contact. An insulating composite bushing is added between the posts and the conductive base to reduce current shunting, lowering circuit resistance and ensuring long-term switch stability. The connection between the terminals and the conductive base utilizes a snap ring connection, reducing terminal jamming. The contact points are silver-plated, ensuring precise opening and closing positions and guaranteed insertion depth, significantly improving switch stability. Bird shields are installed on both sides of the conductive base to prevent birds from nesting and causing short circuits. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the right conductive front view structure of this utility model;

[0015] Figure 2 This is a top view schematic diagram of the right conductive structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the right conductive structure of this utility model from a bottom view;

[0017] Figure 4 This is a schematic diagram of the left conductive front view structure of this utility model;

[0018] Figure 5 This is a top view schematic diagram of the left conductive structure of this utility model;

[0019] Figure 6 This is a schematic diagram of the left conductive structure of this utility model viewed from below. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0021] like Figure 1-6 The diagram shown is a schematic representation of the right conductive structure of this utility model. The conductive base 1 is connected to the contact head 9 via bolts. Figure 4-6 This is a schematic diagram of the left conductive structure of the conductive structure of this utility model. The difference is that the conductive base 1 is connected to the contact finger 10 by bolts. The current flow direction is terminal 2, soft conductor 3, conductive base 1, contact 9 (or contact finger 10). The opening and closing operation of the disconnecting switch is realized by the engagement and disengagement of contact 9 and contact finger 10.

[0022] The specific structure of this utility model will be described here using the right conductive structure as an example.

[0023] This novel conductive structure for the GW4-12 disconnector includes left and right conductive parts with identical structures. The left conductive part is connected to contact finger 10, and the right conductive part is connected to contact head 9. The novel conductive structure includes a conductive base 1, a terminal block 2, and a flexible connection 3. The terminal block 2 is bolted to the flexible connection 3 via a composite bushing 4. The flexible connection 3 is bolted to the conductive base 1. The terminal block 2 is integrally formed and connected to the conductive base 1 via a snap ring 6 through a composite bushing 5. The conductive base 1 is formed from aluminum profile.

[0024] As a preferred embodiment, in this embodiment, a stainless steel plate 7 is provided and fixedly connected between the conductive base 1 and the post insulator, so that there are no external parts at the connection between the conductive part and the post insulator, ensuring the integrity of the conductivity and reducing external corrosion.

[0025] As a preferred embodiment, bird shields 8 are provided on both the left and right sides of the conductive base 1 to prevent birds from nesting and causing short circuits or other risks to the equipment.

[0026] As a preferred embodiment, in this embodiment, the contact points of the contact 9 and the contact finger 10 are both provided with a silver plating layer.

[0027] As a crucial component of the entire disconnecting switch, the conductive part is a vital link in realizing the dual functions of "conduction" and "isolation." Its structure and materials directly determine the current-carrying capacity, safe lifespan, and operational reliability of the disconnecting switch, making it a key link in ensuring the switching and isolation functions of the power system. This utility model uses an integral aluminum profile for the conductive base, replacing the complex structure of the original finger-side conductive base and finger base, thus reducing the circuit resistance. The terminal blocks are connected to the bottom of the conductive base with snap rings, replacing the original bolt fastening method and reducing the possibility of jamming at the switch terminals. At the same time, a composite bushing is added for insulation treatment, reducing current shunting in the conductive base, making the entire switch work stably and reliably. The contact area between the contacts and the fingers is treated with anti-wear measures, ensuring precise opening and closing positions, deeper insertion depth, reliable opening and closing, and greatly improving stability.

[0028] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A novel conductive structure for a GW4-12 type disconnecting switch, comprising a left conductive portion and a right conductive portion having identical structures, wherein the left conductive portion is connected to a contact finger (10), and the right conductive portion is connected to a contact head (9), the novel conductive structure comprising a conductive base (1), a terminal block (2), and a flexible connection (3), characterized in that, The terminal block (2) is connected to the flexible connection (3) by bolts through the composite bushing (4). The flexible connection (3) is connected to the conductive seat (1) by bolts. The terminal post of the terminal block (2) is integrally formed and connected to the conductive seat (1) by the snap ring (6) through the composite bushing (5). The conductive seat (1) is formed by processing aluminum profile.

2. A novel conductive structure for a GW4-12 type disconnecting switch according to claim 1, characterized in that, A stainless steel plate (7) is provided and fixedly connected between the conductive base (1) and the post insulator.

3. A novel conductive structure for a GW4-12 type disconnecting switch according to claim 1, characterized in that, Bird guards (8) are provided on both the left and right sides of the conductive base (1).

4. A novel conductive structure for a GW4-12 type disconnecting switch according to claim 1, characterized in that, The contact points of the contact (9) and the contact fingers (10) are both provided with a silver plating layer.

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