Large-current outgoing line assembly of environment-friendly gas-insulated switchgear

Abstract

The utility model belongs to an environment-friendly gas-insulated switchgear heavy-current outgoing line assembly, which comprises a conductor, a spring contact finger is arranged at the right end of the conductor, the spring contact finger is in contact connection with a circuit breaker contact, and a shielding cover is arranged at the left end of the conductor; the upper side wall of the conductor is provided with first heat dissipation holes for air flow circulation. The lower side wall of the conductor is provided with a screw hole which is used for fastening a screw and is connected with the inner cone insulator, and a heat dissipation hole II through which air flows; the conductor and the inner cone insulator are tightly connected with the cushion block through fastening screws. The outgoing line assembly effectively optimizes the electric field distribution, enhances the insulation performance, improves the temperature rise margin, and improves the reliability of equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage electrical equipment, in particular to a high-current outlet assembly of an environmentally friendly inflatable cabinet. Background Art

[0002] At present, under the guidance of the national "dual carbon" goals, all walks of life have launched explorations of sustainable transformation, and the power grid and its equipment manufacturing industry is no exception. The new power system that the entire power industry is accelerating to build has also put forward demands for new power equipment that is greener, more environmentally friendly, and low-carbon. In this case, environmentally friendly gas filling cabinets have become one of the main development directions. The development of an environmentally friendly gas filling cabinet completely eliminates SF6 gas, and uses environmentally friendly gases such as dry air or nitrogen, while maintaining the advantages of the gas filling cabinet being fully insulated and fully enclosed.

[0003] Since the insulation performance of dry air or nitrogen is lower than that of SF6 gas, when the environmentally friendly high-current gas-filled cabinet circuit breaker and the inner cone insulator are connected with a rectangular busbar, the space limitation causes the insulation to fail to meet the use requirements. At the same time, the thermal conductivity of dry air or nitrogen is worse than that of SF6 gas at a certain inflation pressure, which causes the environmentally friendly high-current gas-filled cabinet to generate heat when using a rectangular busbar, resulting in excessive temperature rise. Summary of the invention

[0004] The utility model aims to provide a large current outlet assembly of an environmentally friendly inflatable cabinet, so as to solve the problem that the insulation cannot meet the requirements when the circuit breaker and the inner cone insulator in the existing environmentally friendly inflatable cabinet are connected by a rectangular busbar due to space limitations, and solve the problem that the temperature rise exceeds the standard when the rectangular busbar is used in the existing environmentally friendly large current inflatable cabinet.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is:

[0006] A large current outlet assembly of an environmentally friendly inflatable cabinet is characterized by: a round tube conductor, a notch is provided at the right end of the conductor, a spring contact finger is installed in the notch, and the circuit breaker contact is inserted into the conductor to compress and deform the spring contact finger so as to be tightly connected; a shielding cover is fixedly installed on the left end of the conductor by a set screw; a heat dissipation hole 1 for air flow is provided on the upper side wall of the conductor; a screw hole connected with a fastening screw and an inner cone insulator, and a heat dissipation hole 2 for air flow are provided on the lower side wall of the conductor; a conductive pad is provided on the outer wall of the conductor at the overlap portion of the inner cone insulator and the conductor, and a fixed pad is provided on the inner wall of the conductor at the overlap portion of the inner cone insulator and the conductor, and is fastened and connected to the inner cone insulator by a fastening screw.

[0007] The beneficial effects of the utility model are:

[0008] 1. The utility model uses a round tube as a conductor, which effectively avoids the influence of the skin effect, proximity effect and low current carrying capacity of the same cross-section on the rectangular busbar, optimizes the electric field distribution, enhances the insulation performance, meets the requirements of large current, and improves the reliability of the equipment.

[0009] 2. Heat dissipation holes 1 and 2 are provided on the upper and lower side walls of the conductor to effectively form an air flow channel to avoid excessive temperature rise caused by heat concentration generated by large current.

[0010] 3. The utility model has the advantages of simple structure, small size, high reliability, suitability for large current and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 for Figure 1 Cross-section of the middle AA;

[0013] Figure 3 It is a schematic diagram of the conductor structure of the utility model;

[0014] Figure 4 This is a diagram of the use state of the utility model;

[0015] Figure 5 for Figure 4 Cross-section of the BB. DETAILED DESCRIPTION

[0016] The following is a detailed description of the utility model in conjunction with the accompanying drawings.

[0017] like Figures 1 to 5 The illustrated embodiment is an environmentally friendly inflatable cabinet high current outlet assembly, comprising a round tube conductor 1, a notch 10 is provided at the right end of the conductor 1, a spring contact finger 2 is installed in the notch 10, a circuit breaker contact 3 is inserted into the conductor 1 to compress and deform the spring contact finger 2 and tightly connect; a shielding cover 4 is fixedly installed at the left end of the conductor 1 by a set screw; a heat dissipation hole 5 for air flow is provided on the upper side wall of the conductor 1; a screw hole 6 for fastening screws and connected to the inner cone insulator is provided on the lower side wall of the conductor 1, as well as a heat dissipation hole 7 for air flow; a conductive pad 8 is provided on the outer wall of the conductor 1 at the overlap portion between the inner cone insulator and the conductor 1, and a fixed pad 9 is provided on the inner wall of the conductor 1 at the overlap portion between the inner cone insulator and the conductor 1, which is fastened and connected to the inner cone insulator by a fastening screw.

[0018] The inner and outer walls of the conductor 1 are coated with an insulating anti-corona layer 11, the inside of the notch 10 is not coated with the insulating anti-corona layer 11, and the surface in contact with the conductive pad 8 is not coated with the insulating anti-corona layer 11. The side walls of the heat dissipation hole 1 5, the screw hole 6, and the heat dissipation hole 2 7 are all coated with the insulating anti-corona layer 11, and the end face of the conductor 1 is coated with the insulating anti-corona layer 11.

[0019] The utility model adopts a round tube as the conductor, which increases the current carrying capacity, optimizes the electric field distribution, and effectively avoids the insulation failing to meet the use requirements due to space limitations when connecting rectangular busbars; at the same time, air flow holes are opened in the conductor 1 to avoid excessive temperature rise due to heat concentration.

[0020] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high current outlet assembly for an environmentally friendly inflatable cabinet, characterized by: The invention comprises a round tube conductor (1), wherein a spring contact finger (2) is installed at the right end of the conductor (1), and the spring contact finger (2) is in contact with a circuit breaker contact (3); a shielding cover (4) is installed at the left end of the conductor (1); a heat dissipation hole (5) for airflow is provided on the upper side wall of the conductor (1); a screw hole (6) for fastening screws and connected to an inner cone insulator, and a heat dissipation hole (7) for airflow are provided on the lower side wall of the conductor (1); a conductive pad (8) is provided on the outer wall of the overlapped portion of the inner cone insulator and the conductor (1), and a fixed pad (9) is provided on the inner wall of the overlapped portion of the inner cone insulator and the conductor (1), and is fastened and connected to the inner cone insulator by a fastening screw.

2. The high current outlet assembly of an environmentally friendly inflatable cabinet according to claim 1, characterized in that: The right end of the conductor (1) is provided with a notch (10), a spring contact finger (2) is installed in the notch (10), a circuit breaker contact (3) is inserted into the conductor (1) so that the spring contact finger (2) is compressed and deformed to be tightly connected, and a shielding cover (4) is fixedly installed on the left end of the conductor (1) by a set screw.

3. The high current outlet assembly of an environmentally friendly inflatable cabinet according to claim 1, characterized in that: The circuit breaker contact (3) is provided with a heat dissipation hole three (12) for dissipating high heat generated at the overlapped portion of the contact and the spring contact finger (2).

4. The high current outlet assembly of an environmentally friendly inflatable cabinet according to claim 1, characterized in that: The upper end of the conductive pad (8) is provided with a contact surface which can fit and support the outer wall of the conductor (1) and can reliably carry current.

5. The high current outlet assembly of an environmentally friendly inflatable cabinet according to claim 1, characterized in that: The lower end of the fixed pad (9) is provided with a contact surface which can be reliably fastened to the inner wall of the conductor (1).

6. The high current outlet assembly of an environmentally friendly inflatable cabinet according to claim 1, characterized in that: The inner and outer walls of the conductor (1) are coated with an insulating anti-corona layer (11), the side walls of the heat dissipation hole 1 (5), the heat dissipation hole 2 (7) and the screw hole (6) are coated with an insulating anti-corona layer (11), and the end surface of the conductor (1) is coated with an insulating anti-corona layer (11).

Images