24kV environment-friendly gas insulation ring main unit

Abstract

The utility model discloses a 24kV environment-friendly gas insulated ring main unit, which belongs to the technical field of ring main units and comprises a cable chamber, a pressure relief chamber, a mechanism chamber and a switch chamber. A three-position switch assembly and a circuit breaker switch assembly are installed in the switch chamber, the three-position switch assembly comprises a switch support fixed in the switch chamber, the cable chamber, the pressure relief chamber, the mechanism chamber, the switch chamber and the instrument chamber can be integrally and reasonably arranged, and an insulation side plate is connected with other structures to form a whole. According to the circuit breaker switch assembly, the insulation performance of the whole circuit breaker switch assembly is enhanced through isolation of the insulation side plates, and meanwhile nitrogen, dry air and other environment-friendly gases serve as insulation media in the switch chamber, so that a series of environmental pollution problems generated by a 24 kV environment-friendly gas insulation ring main unit are solved.

Description

Technical Field

[0001] This utility model relates to the field of ring main unit technology, and more specifically, to a 24kV environmentally friendly gas-insulated ring main unit. Background Technology

[0002] Environmentally friendly gas-insulated ring main units refer to ring main units that use environmentally friendly gases as the insulating medium. They are widely used in various power systems, especially in applications requiring high reliability and environmental performance, such as hospitals, airports, and data centers.

[0003] Based on the above, the inventors have discovered that traditional 24kV environmentally friendly gas-insulated ring main units primarily use SF6 as the insulating gas. However, SF6, as a greenhouse gas, has a significant environmental impact due to its long-term and large-scale use, coupled with difficulties in recycling. The emergence of solid-insulated ring main units has mitigated this phenomenon to some extent. However, the large amount of epoxy resin used in solid-insulated ring main units is difficult to recycle, also causing environmental pollution. Furthermore, long-term operation can easily lead to cracking, severely affecting the insulation performance of the switch body. Therefore, in view of this, the inventors have researched and improved the existing structure to provide a 24kV environmentally friendly gas-insulated ring main unit, aiming to achieve greater practical value. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a 24kV environmentally friendly gas-insulated ring main unit. It can rationally arrange the cable compartment, pressure relief compartment, mechanism compartment, switch compartment, and instrument compartment as a whole, and connect the insulating side plate with other structures to form a whole. Through the isolation of the insulating side plate, the overall insulation performance of the circuit breaker switch assembly is enhanced. At the same time, nitrogen, dry air, and other environmentally friendly gases are used as insulating media inside the switch compartment to solve a series of environmental pollution problems caused by the 24kV environmentally friendly gas-insulated ring main unit.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A 24kV environmentally friendly gas-insulated ring main unit includes a cable compartment, a pressure relief compartment, a mechanism compartment, and a switch compartment. The mechanism compartment is equipped with a three-position mechanism and a circuit breaker mechanism, and the switch compartment is equipped with a three-position switch assembly and a circuit breaker switch assembly.

[0009] The three-position switch assembly includes a switch bracket fixed inside the switch chamber. Multiple insulating support blocks are fixedly connected to the inner wall of one side of the switch bracket. An insulating main shaft is rotatably connected between the inner walls of both ends of the switch bracket. One end of the insulating support block is supported on the bottom of the insulating main shaft. A moving contact is provided on the insulating main shaft. Multiple grounding contacts are fixedly connected to the inner wall of the other side of the switch bracket.

[0010] The circuit breaker switch assembly includes two insulating side plates fixedly installed inside the switch chamber. Multiple support seats are fixedly connected between the inner walls of the two sides of the insulating side plates. A hexagonal square shaft is provided between the inner walls of the two sides of the insulating side plates, and the support seats are sleeved on the hexagonal square shaft. A crank arm is provided on the outer periphery of the hexagonal square shaft. A vacuum interrupter is connected to the top of the support seat through a contact spring assembly. The vacuum interrupter is connected to the moving contact through an upper flexible connection.

[0011] Furthermore, the cable compartment is located on one side of the pressure relief chamber, and the mechanism compartment and switch compartment are respectively installed on the top of the cable compartment and the pressure relief chamber, and are distributed side by side. An instrument compartment is installed on the top of the mechanism compartment.

[0012] Furthermore, one end of the insulated spindle is sealed to the three-station mechanism via a sealing flange.

[0013] Furthermore, one end of the hexagonal square shaft extends into the mechanism chamber, and the hexagonal square shaft is sealed to the mechanism chamber. The extended end of the hexagonal square shaft is sealed to the circuit breaker mechanism through a circuit breaker dynamic seal.

[0014] Furthermore, the switch chamber is equipped with multiple side expansion sleeves and bottom outlet sleeves, which are respectively located above the moving contact and below the hexagonal square shaft.

[0015] Furthermore, an upper busbar is provided on the side expansion sleeve, and a stationary contact is provided at the bottom of the upper busbar.

[0016] Furthermore, the lower outgoing bushing is installed between the cable compartment and the switch compartment, and a lower busbar is installed on the lower outgoing bushing, with one end of the lower busbar connected to the corresponding contact spring assembly via a lower flexible connector.

[0017] 3. Beneficial effects

[0018] Compared with existing technologies, the advantages of this utility model are:

[0019] This solution, through a rational overall structural layout, connects the vacuum interrupter, contact spring assembly, and crank arm in the circuit breaker switch assembly. These components are then integrated with the insulating side plate via a support base. The insulating side plate enhances the insulation performance of the circuit breaker switch assembly. Furthermore, the insulating spindle in the three-position switch assembly is integrally molded from insulating material, significantly improving its strength. Additionally, the circuit breaker switch assembly and the three-position switch assembly are assembled into a single switch structure and installed in a fully sealed switch chamber. The switch chamber is filled with nitrogen, dry air, and other environmentally friendly gases as insulating media. The small amount of solid insulating material primarily serves a supporting function, increasing insulation reliability while reducing the size of the ring main unit. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the three-position switch assembly of this utility model;

[0023] Figure 4 This is a schematic diagram of the circuit breaker switch assembly structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the side expansion sleeve position structure of this utility model.

[0025] Explanation of the labels in the diagram:

[0026] 1. Cable compartment;

[0027] 2. Pressure relief chamber;

[0028] 3. Institutional Office;

[0029] 4. Switch room;

[0030] 5. Three-station mechanism;

[0031] 6. Circuit breaker mechanism;

[0032] 7. Three-position switch assembly; 701. Switch bracket; 702. Insulating support block; 703. Insulating spindle; 704. Moving contact; 705. Grounding contact;

[0033] 8. Circuit breaker switch assembly; 801. Insulating side plate; 802. Support base; 803. Hexagonal square shaft; 804. Crank arm; 805. Contact spring assembly; 806. Vacuum interrupter;

[0034] 9. Side-expanding sleeve;

[0035] 10. Lower outlet sleeve;

[0036] 11. Upper busbar;

[0037] 12. Stationary contact;

[0038] 13. Lower busbar;

[0039] 14. Instrument Room. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0041] Example:

[0042] Please see Figures 1-5 A 24kV environmentally friendly gas-insulated ring main unit includes a cable compartment 1, a pressure relief compartment 2, a mechanism compartment 3, and a switch compartment 4. The mechanism compartment 3 is equipped with a three-position mechanism 5 and a circuit breaker mechanism 6. The switch compartment 4 is equipped with a three-position switch assembly 7 and a circuit breaker switch assembly 8.

[0043] The three-position switch assembly 7 includes a switch bracket 701 fixed inside the switch chamber 4. Multiple insulating support blocks 702 are fixedly connected to the inner wall of one side of the switch bracket 701. An insulating spindle 703 is rotatably connected between the inner walls of both ends of the switch bracket 701. One end of the insulating support block 702 is supported on the bottom of the insulating spindle 703. A moving contact 704 is provided on the insulating spindle 703. Multiple grounding contacts 705 are fixedly connected to the inner wall of the other side of the switch bracket 701.

[0044] The circuit breaker switch assembly 8 includes two insulating side plates 801 fixedly installed inside the switch chamber 4. Multiple support seats 802 are fixedly connected between the inner walls of the two sides of the insulating side plates 801. A hexagonal square shaft 803 is provided between the inner walls of the two sides of the insulating side plates 801, and the support seats 802 are sleeved on the hexagonal square shaft 803. A crank arm 804 is provided on the outer periphery of the hexagonal square shaft 803. The top of the support seat 802 is connected to a vacuum interrupter 806 through a contact spring assembly 805. The vacuum interrupter 806 is connected to the moving contact 704 through an upper flexible connection.

[0045] See Figure 1 The cable compartment 1 is located on one side of the pressure relief compartment 2. The mechanism compartment 3 and the switch compartment 4 are respectively installed on the top of the cable compartment 1 and the pressure relief compartment 2, and are distributed side by side. The instrument compartment 14 is installed on the top of the mechanism compartment 3.

[0046] See Figure 2 One end of the insulated spindle 703 is sealed to the three-station mechanism 5 via a sealing flange.

[0047] See Figure 2 Figure 4 One end of the hexagonal square shaft 803 extends into the mechanism chamber 3, and the hexagonal square shaft 803 is sealed to the mechanism chamber 3. The extended end of the hexagonal square shaft 803 is sealed to the circuit breaker mechanism 6 through the circuit breaker dynamic seal.

[0048] See Figures 2-4 The switch chamber 4 is equipped with multiple side expansion bushings 9 and lower outlet bushings 10, which are respectively located above the moving contact 704 and below the hexagonal square shaft 803.

[0049] See Figure 5 An upper busbar 11 is provided on the side expansion sleeve 9, and a stationary contact 12 is provided at the bottom of the upper busbar 11.

[0050] See Figure 2 The lower outgoing bushing 10 is installed between the cable chamber 1 and the switch chamber 4. The lower outgoing bushing 10 is equipped with a lower busbar 13, and one end of the lower busbar 13 is connected to the corresponding contact spring assembly 805 through a lower flexible connector.

[0051] In use: the cable compartment 1, pressure relief compartment 2, mechanism compartment 3, switch compartment 4, and instrument compartment 14 are arranged in a reasonable overall layout. Among them, the vacuum interrupter 806, contact spring group 805, and crank arm 804 in the circuit breaker switch assembly 8 are connected and then connected to the insulating side plate 801 through the support base 802 and the support for installing the upper flexible connection to form an integral structure. The insulation performance of the circuit breaker switch assembly 8 is enhanced by the isolation of the insulating side plate 801. At the same time, the insulating spindle 703 in the three-position switch assembly 7 is integrally molded with insulating material, which can greatly improve the strength of the insulating spindle 703 during use and ensure the normal operation of the equipment. In addition, the circuit breaker switch assembly 8 and the three-position switch assembly 7 are assembled into an integrated switch structure and installed in the fully sealed switch compartment 4. The switch compartment 4 is filled with nitrogen, dry air and other environmentally friendly gases as insulating media. The use of a small amount of insulating solid mainly serves as a support, which increases the reliability of insulation and reduces the volume of the ring main unit.

[0052] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0053] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A 24kV environmentally friendly gas insulated ring main unit, comprising a cable chamber (1), a pressure relief chamber (2), a mechanism chamber (3) and a switch chamber (4), characterized in that: The mechanism chamber (3) is internally provided with a three-position mechanism (5) and a circuit breaker mechanism (6), and the switch chamber (4) is internally provided with a three-position switch assembly (7) and a circuit breaker switch assembly (8); The three-position switch assembly (7) comprises a switch support (701) fixedly arranged in the switch chamber (4), a plurality of insulating support blocks (702) are fixedly connected to the inner wall of one side of the switch support (701), an insulating main shaft (703) is rotatably connected between the inner walls of the two ends of the switch support (701), and one end of the insulating support block (702) is supported on the bottom of the insulating main shaft (703); a movable contact (704) is arranged on the insulating main shaft (703); and a plurality of grounding contacts (705) are fixedly connected to the inner wall of the other side of the switch support (701). The circuit breaker switch assembly (8) comprises two insulating side plates (801) fixedly arranged in the switch chamber (4), a plurality of support seats (802) are fixedly connected between the inner walls of the two sides of the insulating side plates (801), a hexagonal square shaft (803) is arranged between the inner walls of the two sides of the insulating side plates (801), and the support seat (802) is sleeved on the hexagonal square shaft (803); an elbow arm (804) is arranged on the outer periphery of the hexagonal square shaft (803); a vacuum arc-extinguishing chamber (806) is connected to the top of the support seat (802) through a contact spring group (805); and the vacuum arc-extinguishing chamber (806) is connected to the movable contact (704) through an upper flexible connection.

2. The 24 kV environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: The cable chamber (1) is arranged on one side of the pressure relief chamber (2), the mechanism chamber (3) and the switch chamber (4) are arranged on the top of the cable chamber (1) and the pressure relief chamber (2) respectively and in parallel, and the instrument chamber (14) is arranged on the top of the mechanism chamber (3).

3. The 24 kV environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: One end of the insulating main shaft (703) is sealingly connected to the three-position mechanism (5) through a sealing flange.

4. The 24 kV environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: One end of the hexagonal square shaft (803) extends into the mechanism chamber (3) and is sealingly connected to the mechanism chamber (3), and the extending end of the hexagonal square shaft (803) is sealingly connected to the circuit breaker mechanism (6) through a circuit breaker movable seal.

5. The 24 kV environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: A plurality of side expansion sleeves (9) and a lower outgoing line sleeve (10) are arranged in the switch chamber (4).

6. The 24 kV environmentally friendly gas insulated ring main unit according to claim 5, characterized in that: An upper bus (11) is arranged on the side expansion sleeve (9), and a static contact (12) is arranged at the bottom of the upper bus (11).

7. The 24 kV environmentally friendly gas insulated ring main unit according to claim 5, characterized in that: The lower outgoing line sleeve (10) is arranged between the cable chamber (1) and the switch chamber (4), a lower bus (13) is arranged on the lower outgoing line sleeve (10), and one end of the lower bus (13) is connected to the corresponding contact spring group (805) through a lower flexible connection.

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