Compact top isolation ring network cabinet switch

Abstract

This utility model proposes a compact top-isolated ring main unit switch, comprising: a first frame and a second frame, a three-position insulated operating shaft between the first and second frames, a three-position knife switch mounted on the three-position insulated operating shaft, a bottom support frame below the three-position knife switch, a top support frame above it, a knife switch cover at the front, and a circuit breaker mounted on the bottom support frame. One end of the circuit breaker is fitted with a circuit breaker cam, and the other end is fitted with the circuit breaker insulated operating shaft. Therefore, the compact top-isolated ring main unit switch proposed in this utility model has good structural stability. When the three-position knife switch is used in conjunction with the isolating stationary contact, it achieves power isolation, ensuring maintenance or repair without current flow. When used in conjunction with the grounding stationary contact, it achieves grounding protection, preventing electric shock accidents. The knife switch cover at the front of the three-position knife switch protects the three-position knife switch, thereby achieving the safety of the entire ring main unit.

Description

Technical Field

[0001] This utility model belongs to the field of ring main unit switch technology, and specifically relates to a compact top-isolated ring main unit switch. Background Technology

[0002] Ring main units (RMS) are a common type of equipment in power systems, used for power distribution and management. They are devices that integrate transmission, distribution, protection, and control functions. RMS units typically use reliable insulation materials and possess characteristics such as protection, isolation, and automated control.

[0003] Currently, the knife-arm section of a ring main unit generally does not have a protective cover. In order to achieve the stability of the whole unit and its individual parts, a compact top-isolated ring main unit switch is proposed to ensure the safety of the knife-arm section.

[0004] Therefore, in view of the shortcomings of the above-mentioned solutions in actual manufacturing and implementation, this utility model was created by making corrections and improvements, and a compact top-isolated ring main unit switch is provided to solve the above-mentioned problems. Utility Model Content

[0005] This utility model proposes a compact top-isolated ring main unit switch, which solves the problems in the prior art.

[0006] The technical solution of this utility model is implemented as follows: A compact top-isolated ring main unit switch includes: a first frame and a second frame, a three-position insulated operating shaft is provided between the first frame and the second frame, a three-position knife switch is provided on the three-position insulated operating shaft, a bottom support frame is provided below the three-position knife switch, a top support frame is provided above the three-position knife switch, and a knife switch cover is provided in front. A circuit breaker is provided on the bottom support frame, a circuit breaker cam is fitted at one end of the circuit breaker, and a circuit breaker insulated operating shaft is fitted at the other end.

[0007] In a preferred embodiment of a compact top-isolated ring main unit switch, the first and second rack plates are fixedly engaged with the bottom support frame and the top support frame by fasteners.

[0008] By adopting the above scheme, the first frame, the second frame, and the top support frame can be made of hollow structure, which can reduce the counterweight and achieve better stability.

[0009] In a preferred embodiment of a compact top-isolated ring main unit switch, the root of the three-position knife switch is assembled in a three-position insulated operating shaft, and the three-position insulated operating shaft is connected to a shaft seal.

[0010] Using the above solution, the three-position shaft seal can prevent gas from escaping from the gas box and drive the three-position insulated operating shaft to rotate. The shaft seal achieves a sealing effect by tightly contacting and wrapping the rotating shaft with its rubber sealing lip. In a preferred embodiment of a compact top-isolated ring main unit switch, the top of the inner wall of the knife switch cover is fixedly fitted with the top support frame, and the bottom wall of the inner wall of the knife switch cover is fixedly fitted with the bottom support frame.

[0011] The purpose of the above solution is to protect the three-position knife switch, thereby achieving the safety of the entire ring main unit. Secondly, the knife switch cover is easy to assemble and has a good connection effect.

[0012] As a preferred embodiment of a compact top-isolated ring main unit switch, an isolating stationary contact fixed to the top support frame is provided behind the three-position knife switch, and a grounding stationary contact fixed to the bottom support frame is provided in front of the three-position knife switch.

[0013] The above scheme uses an isolating stationary contact to isolate the power supply, ensuring that maintenance or repair can be carried out without current flowing through it, while a grounding stationary contact provides grounding protection to prevent electric shock accidents.

[0014] In a preferred embodiment of a compact, top-isolated ring main unit switch, a connection terminal cover is fixedly installed on the circuit breaker.

[0015] By adopting the above solution, the terminal cover can enhance the electric field insulation capability at the circuit breaker connection and improve its safety.

[0016] After adopting the above technical solution, the beneficial effects of this utility model are as follows: The compact top-isolated ring main unit switch structure proposed by this utility model has good stability. Firstly, the first frame plate, the second frame plate, and the top support frame can adopt a hollow structure, which can reduce the counterweight and achieve better stability. During operation, when the three-position knife switch is used in conjunction with the isolating stationary contact, it can isolate the power supply and ensure that maintenance or repair can be carried out without current passing through. When used in conjunction with the grounding stationary contact, it can achieve grounding protection and prevent electric shock accidents. The knife switch cover in front of the three-position knife switch can protect the three-position knife switch, thereby achieving the safety of the entire ring main unit. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the switch structure of the compact upper-isolated ring main unit of this utility model; Figure 2 This is a front view of the compact upper-isolated ring main unit switch structure of this utility model; Figure 3 This is a side view of the switch structure of the compact upper-isolated ring main unit of this utility model; Figure 4 This is a bottom view of the compact upper-isolated ring main unit switch structure of this utility model; Figure 5 This is a rear view of the compact upper-isolated ring main unit switch structure of this utility model; In the diagram, 1-first support plate; 2-second support plate; 3-bottom support frame; 4-top support frame; 5-three-position insulated operating shaft; 51-three-position disconnect switch; 6-three-position shaft seal; 7-disconnect switch cover; 8-isolation stationary contact; 9-grounding stationary contact; 10-circuit breaker; 11-circuit breaker cam; 12-circuit breaker insulated operating shaft; 13-connection terminal cover. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1-5 As shown, a compact top-isolated ring main unit switch includes: a first frame plate 1 and a second frame plate 2. A three-position insulated operating shaft 5 is arranged between the first frame plate 1 and the second frame plate 2. A three-position knife switch 51 is arranged on the three-position insulated operating shaft 5. A bottom support frame 3 is arranged below the three-position knife switch 51, a top support frame 4 is arranged above it, and a knife switch cover 7 is arranged in front. A circuit breaker 10 is arranged on the bottom support frame 3. The circuit breaker 10 is driven by the circuit breaker insulated operating shaft 12 through the circuit breaker cam 11 to perform closing and opening operations.

[0021] The first frame plate 1 and the second frame plate 2 are fixedly engaged with the bottom support frame 3 and the top support frame 4 by fasteners.

[0022] Furthermore, the first frame 1, the second frame 2, and the top support frame 4 can adopt a hollow structure, which can reduce the counterweight and achieve better stability.

[0023] The three-position knife switch 51 is mounted at its base in the three-position insulating operating shaft 5, and the insulating operating shaft is connected to the shaft seal 6.

[0024] Furthermore, the three-position shaft seal 6 prevents gas from escaping from the gas box and drives the three-position insulated operating shaft to rotate. The shaft seal achieves a sealing effect by tightly contacting and wrapping the rotating shaft with its rubber sealing lip.

[0025] The top of the inner wall of the knife switch cover 7 is fixedly fitted with the top support frame 4, and the bottom of the inner wall of the knife switch cover 7 is fixedly fitted with the bottom support frame 3.

[0026] Furthermore, the purpose of the knife switch cover 7 is to protect the three-position knife switch 51, thereby achieving the safety of the entire ring main unit. Secondly, the knife switch cover 7 is easy to assemble and has a good connection effect.

[0027] Among them, the three-position knife switch 51 is provided with an isolation stationary contact 8 fixed on the top support frame 4 at the rear, and a grounding stationary contact 9 fixed on the bottom support frame 3 at the front.

[0028] Furthermore, the isolating stationary contact 8 isolates the power supply, ensuring that maintenance or repair can be carried out without current flowing through it, while the grounding stationary contact 9 provides grounding protection to prevent electric shock accidents.

[0029] The circuit breaker 10 is fixedly equipped with a connection terminal cover 13.

[0030] Furthermore, the terminal cover 13 can enhance the electric field insulation capability at the connection of the circuit breaker 10 and improve its safety.

[0031] The compact, top-isolated ring main unit switch structure proposed in this utility model has good stability. During operation, the three-position knife switch 51, when in conjunction with the isolating stationary contact 8, isolates the power supply, ensuring maintenance or repair can be carried out without current flow. When in conjunction with the grounding stationary contact 9, it provides grounding protection to prevent electric shock accidents. The knife switch cover 7 in front of the three-position knife switch 51 protects the three-position knife switch 51, thereby achieving the safety of the entire ring main unit.

[0032] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise specified and limited, it should be noted that the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components, and can be direct connections or indirect connections through an intermediate medium. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0033] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A compact top-isolated ring main unit switch, characterized in that, include: A first frame (1) and a second frame (2) are provided. A three-position insulated operating shaft (5) is provided between the first frame (1) and the second frame (2). A three-position knife switch (51) is provided on the three-position insulated operating shaft (5). A bottom support frame (3) is provided below the three-position knife switch (51), a top support frame (4) is provided above it, and a knife switch cover (7) is provided in front. A circuit breaker (10) is provided on the bottom support frame (3). A circuit breaker cam (11) is fitted at one end of the circuit breaker (10), and a circuit breaker insulated operating shaft (12) is fitted at the other end.

2. The compact top-isolated ring main unit switch according to claim 1, characterized in that, The first frame plate (1) and the second frame plate (2) are fixedly engaged with the bottom support frame (3) and the top support frame (4) by fasteners.

3. A compact top-isolated ring main unit switch according to claim 1, characterized in that, The root of the three-position knife switch (51) is assembled in the three-position insulated operating shaft (5), and the three-position insulated operating shaft (5) is connected to the shaft seal (6).

4. A compact top-isolated ring main unit switch according to claim 1, characterized in that, The top of the inner wall of the knife gate cover (7) is fixedly fitted with the top support frame (4), and the bottom of the inner wall of the knife gate cover (7) is fixedly fitted with the bottom support frame (3).

5. A compact top-isolated ring main unit switch according to claim 1, characterized in that, An isolating stationary contact (8) fixed on the top support frame (4) is provided behind the three-position knife switch (51), and a grounding stationary contact (9) fixed on the bottom support frame (3) is provided in front of the three-position knife switch (51).

6. A compact top-isolated ring main unit switch according to claim 1, characterized in that, A connection terminal cover (13) is fixedly installed on the circuit breaker (10).

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