A compact, bottom-isolated, environmentally friendly ring main unit switch

Abstract

A compact lower-isolated environmentally friendly ring network cabinet switch includes: a support frame, which is composed of an upper support beam, a lower support beam, a left support plate and a right support plate, and is fixedly matched with each other by fasteners; a circuit breaker, which is arranged on the upper support beam, and the circuit breaker is provided with an insulating operating shaft of the circuit breaker, and the insulating operating shaft of the circuit breaker is provided with a cam; a copper bar connection shield, which is arranged on both sides of the cam, and an upper copper bar connection seat is arranged in the copper bar connection shield, wherein the copper bar connection shield realizes increasing the insulation capacity and protection capacity at the upper copper bar connection seat; a three-station insulating operating shaft, which is arranged between the left support plate and the right support plate, and a three-station knife switch is arranged on the three-station insulating operating shaft, and a three-station protective shield is arranged in front of the three-station knife switch; a grounding static contact, which is arranged below the three-station protective shield; and a lower copper bar connection seat, which is arranged on the lower support beam. The overall structure of the present invention has significant advantages in terms of reliability, operational safety, adaptability and space utilization in terms of structural design.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental protection ring main unit switch, and particularly relates to a compact lower isolation environmental protection ring main unit switch. Background Art

[0002] The main functions of the isolating switch under the environmental protection cabinet include the following aspects: isolating the break, grounding protection, and opening and closing the short-circuit current. Under normal circumstances, no unauthorized operation is allowed. During use, regular inspection and maintenance are required to ensure the stability of operation. The isolating circuit breaker switch under the environmental protection cabinet plays a vital role in the power distribution system. Its isolation, communication and protection functions can effectively ensure the safety and stability of the power system.

[0003] At present, there is a need for improvement in the isolating switches under semi-sealed environmental protection cabinets, such as: adding a baffle sleeve to the insulating operating shaft to increase the creepage distance between phases and enhance the insulation capacity; designing a hollow structure on the support frame to reduce the weight while increasing the creepage distance; adding a three-position protective cover at the corresponding position of the three-position knife switch to increase the insulation capacity of the switch, improve the overall stability and reasonably optimize the local electric field structure.

[0004] In view of the shortcomings of the technical field in actual production and implementation, the present invention is proposed to provide a compact lower isolation environmentally friendly ring main unit switch. Summary of the invention

[0005] The invention provides a compact bottom-isolated environmentally friendly ring network cabinet switch, which solves the problems in the prior art.

[0006] The technical solution of the present invention is implemented as follows: a compact lower isolation environmental protection ring network cabinet switch, comprising: The support frame is composed of an upper support beam, a lower support beam, a left support plate and a right support plate, wherein the upper support beam, the lower support beam, the left support plate and the right support plate are fixed by fasteners, wherein the upper support beam and the lower support beam are made of reinforced nylon material and have a hollow structure design, which reduces weight while increasing creepage distance, thereby improving insulation strength and preventing surface leakage and arc propagation; A circuit breaker is arranged on the upper support beam, the circuit breaker is provided with a circuit breaker insulation operating shaft, and the circuit breaker insulation operating shaft is provided with a cam, A copper bar connection shield is provided on both sides of the cam, and an upper copper bar connection seat is provided inside the copper bar connection shield, wherein the copper bar connection shield increases the insulation capacity and protection capacity of the upper copper bar connection seat; A three-station insulating operating shaft is arranged between the left support plate and the right support plate, a three-station knife switch is arranged on the three-station insulating operating shaft, and a three-station protective cover is arranged in front of the three-station knife switch; A grounding static contact, arranged below the three-station protective cover; The lower copper bar connecting seat is arranged on the lower supporting beam.

[0007] As a preferred implementation of a compact lower-isolated environmentally friendly ring main unit switch, an integrated insulating sleeve is provided on the insulating operating shaft of the circuit breaker, and the number of the integrated insulating sleeves is three and the number of the cams is six.

[0008] In the above scheme, the insulating operating shaft of the circuit breaker drives the cam to rotate, and the rotation of the cam drives the moving contact of the circuit breaker to move up and down in a straight line to realize the closing and opening of the circuit breaker. The multiple insulating sleeves on the insulating operating shaft of the circuit breaker increase the creepage distance between phases on the insulating operating shaft. The circuit breaker itself is made of high-performance reinforced nylon material, and a vacuum arc extinguishing chamber is assembled inside.

[0009] As a preferred implementation of a compact lower-isolated environmentally friendly ring main unit switch, the upper copper bar connection seat is connected to the main wiring terminal of the circuit breaker.

[0010] As a preferred implementation of a compact bottom-isolated environmentally friendly ring main unit switch, part of the circuit breaker is located inside the upper support beam, and an isolating static contact is provided at the bottom of the circuit breaker.

[0011] As an optimal implementation of a compact lower-isolated environmentally friendly ring network cabinet switch, the top of the three-station protective cover is fixedly matched with the upper support beam, and the bottom is connected to the frame support beam, and the two ends of the frame support beam are fixedly matched with the left support plate and the right support plate.

[0012] In the above scheme, the three-station protective cover is detachable, and the function of the station protective cover is to increase the insulating baffle of the knife switch and increase the insulation capacity of the switch.

[0013] As a preferred implementation of a compact bottom-isolated environmentally friendly ring main unit switch, the grounding static contact is connected to the frame support beam.

[0014] As a preferred implementation of a compact bottom-isolated environmentally friendly ring main unit switch, the number of the upper copper bar connection sockets and the grounding static contacts is the same.

[0015] As a preferred implementation of a compact lower-isolated environmentally friendly ring main unit switch, the axial movement of the three-station insulating operating shaft drives the three-station knife switch to contact the isolating static contact and the grounding static contact.

[0016] In the above scheme, the three-position insulating operating shaft drives the three-position knife switch to rotate, and the three-position knife switch moves upward to contact the isolating static contact to achieve isolation closing. The knife switch moves downward to achieve isolation opening. The knife switch continues to move downward to achieve grounding closing.

[0017] After adopting the above technical solution, the beneficial effects of the present invention are: The biggest advantage of the overall structure is that it can be placed in a 350mm wide ring main unit and use environmentally friendly gas insulation; by reasonably arranging the overall structural position, the local electric field structure is optimized.

[0018] The upper and lower support beams are made of reinforced nylon with a hollow structure design, which reduces weight while increasing creepage distance, thereby improving insulation strength and preventing surface leakage and arc propagation.

[0019] Multiple insulating sleeves on the insulating operating shaft of the circuit breaker are used to increase the creepage distance between phases on the insulating operating shaft and enhance the insulation capacity.

[0020] In summary, the overall structure has significant advantages in terms of reliability, operational safety, adaptability and space utilization in structural design. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 This is a schematic diagram of the structure of the fourth generation of semi-solid sealed environmental protection cabinet bottom isolation of the present invention; Figure 2 This is a top view of the structure of the lower isolation of the fourth generation semi-solid sealed environmental protection cabinet of the present invention; Figure 3 This is a bottom view of the structure of the lower isolation of the fourth generation semi-solid sealed environmental protection cabinet of the present invention; Figure 4 This is a side view of the structure of the lower isolation of the fourth generation semi-solid sealed environmental protection cabinet of the present invention; Figure 5 It is a side view of the internal structure relationship after the side panels of the present invention are removed; Figure 6 This is a schematic diagram of the overall structural relationship after the three-station protective cover of the present invention is removed; Figure 7 It is a side view of the overall structural relationship after the three-station protective cover of the present invention is removed; In the figure, 1. upper support beam; 2. lower support beam; 3. left support plate; 4. right support plate; 5. circuit breaker; 6. insulated operating shaft of circuit breaker; 7. insulating sleeve; 8. cam; 9. upper copper busbar connecting seat; 10. copper busbar connecting shield; 11. isolating static contact; 12. three-station insulating operating shaft; 13. three-station knife switch; 14. three-station shield; 15. grounding static contact; 16. lower copper busbar connecting seat. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0024] Combined with Figure 1-7 As shown, a compact lower isolation environmental protection ring main unit switch comprises: The support frame is composed of an upper support beam 1, a lower support beam 2, a left support plate 3 and a right support plate 4, which are fixed by fasteners; the upper support beam 1 and the lower support beam 2 are made of reinforced nylon material and have a hollow structure design, which reduces weight while increasing creepage distance, thereby improving insulation strength and preventing surface leakage and arc propagation; A circuit breaker 5 is arranged on the upper support beam 1, and a circuit breaker insulation operating shaft 6 is arranged on the circuit breaker 5, and a cam 8 is arranged on the circuit breaker insulation operating shaft 6; The copper bar connection shield 10 is arranged on both sides of the cam 8, and an upper copper bar connection seat 9 is arranged inside the copper bar connection shield 10; wherein the copper bar connection shield 10 realizes increasing the insulation capacity and protection capacity of the upper copper bar connection seat 9; A three-station insulating operating shaft 12 is disposed between the left support plate 3 and the right support plate 4. A three-station knife switch 13 is disposed on the three-station insulating operating shaft 12. A three-station protective cover 14 is disposed in front of the three-station knife switch 13. The grounding static contact 15 is arranged below the three-station protective cover 14; The lower copper bar connecting seat is arranged on the lower supporting beam 2.

[0025] In some embodiments, such as Figure 2 and Figure 6 As shown, the circuit breaker insulating operating shaft 6 is provided with an integrated insulating stopper sleeve 7 , the number of the integrated insulating stopper sleeves 7 is three, and the number of the cams 8 is six.

[0026] Among them, the upper copper bar connection seat 9 is connected to the main wiring terminal of the circuit breaker 5.

[0027] Furthermore, the insulating operating shaft 6 of the circuit breaker drives the cam 8 to rotate, and the rotation of the cam 8 drives the moving contact of the circuit breaker 5 to move linearly up and down, thereby realizing the closing and opening of the circuit breaker 5. The multiple insulating sleeves 7 on the insulating operating shaft 6 of the circuit breaker increase the creepage distance between phases on the insulating operating shaft, and the circuit breaker 5 itself is made of high-performance reinforced nylon material, and a vacuum arc extinguishing chamber is assembled and placed inside.

[0028] In some embodiments, such as Figure 5 As shown, part of the circuit breaker 5 is located inside the upper support beam 1 , and an isolating static contact 11 is provided at the bottom of the circuit breaker 5 .

[0029] Furthermore, when the three-position insulating operating shaft 12 drives the three-position knife switch 13 to rotate, and the three-position knife switch 13 moves upward and contacts the isolating static contact 11, the isolating closing is realized.

[0030] In some embodiments, such as Figure 5 As shown, the top of the three-station protective cover 14 is fixedly matched with the upper support beam 1, and the bottom is connected to the frame support beam. The two ends of the frame support beam are fixedly matched with the left support plate 3 and the right support plate 4.

[0031] The grounding static contact 15 is connected to the frame supporting beam.

[0032] Furthermore, when the three-position insulating operating shaft 12 drives the three-position knife switch 13 to rotate, and the three-position knife switch 13 moves downward and contacts the grounding static contact 15, the grounding closing is realized.

[0033] In some embodiments, such as Figure 6 As shown, the number of upper copper bar connection sockets 9 and grounding static contacts 15 is the same.

[0034] The implementation principle of a compact lower isolation environmental protection ring network cabinet switch is as follows: First, the current is guided through the upper copper busbar connecting seat 9 through the vacuum arc extinguishing chamber and the isolating static contact 11. When the three-position insulating operating shaft 12 drives the three-position knife switch 13 to rotate, the three-position knife switch 13 moves upward and contacts the isolating static contact 11, realizing the isolating closing, moving downward, realizing the isolating opening, and continuing to move downward to contact the grounding static contact 15 to realize the grounding closing.

[0035] The biggest advantage of the overall structure is that it can be placed in a 350mm wide ring main unit and use environmentally friendly gas insulation. The local electric field structure is optimized by rationally arranging the overall structure position. The overall structure has significant advantages in reliability, operational safety, adaptability and space utilization in structural design.

[0036] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] The above are only preferred 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 compact lower isolation environmental protection ring main unit switch, characterized in that: include: A support frame, comprising an upper support beam (1), a lower support beam (2), a left support plate (3) and a right support plate (4), wherein the upper support beam (1), the lower support beam (2), the left support plate (3) and the right support plate (4) are fixed together by fasteners; A circuit breaker (5) is arranged on the upper support beam (1), the circuit breaker (5) is provided with a circuit breaker insulation operating shaft (6), and the circuit breaker insulation operating shaft (6) is provided with a cam (8), A copper bar connection shield (10) is provided on both sides of the cam (8), and an upper copper bar connection seat (9) is provided inside the copper bar connection shield (10); A three-station insulating operating shaft (12) is disposed between the left support plate (3) and the right support plate (4); a three-station knife switch (13) is disposed on the three-station insulating operating shaft (12); and a three-station protective cover (14) is disposed in front of the three-station knife switch (13); A grounding static contact (15) is arranged below the three-station protective cover (14); The lower copper bar connection seat is arranged on the lower support beam (2).

2. A compact lower isolation environmentally friendly ring main unit switch according to claim 1, characterized in that: An integral insulating stopper (7) is provided on the insulating operating shaft (6) of the circuit breaker, the number of the integral insulating stopper (7) being three and the number of the cams (8) being six.

3. A compact lower isolation environmentally friendly ring main unit switch according to claim 1, characterized in that: The upper copper bar connection seat (9) is connected to the main wiring terminal of the circuit breaker (5).

4. A compact lower isolation environmentally friendly ring main unit switch according to claim 1, characterized in that: Part of the circuit breaker (5) is located inside the upper support beam (1), and an isolating static contact (11) is provided at the bottom of the circuit breaker (5).

5. The compact lower isolation environmentally friendly ring main unit switch according to claim 1, characterized in that: The top of the three-station protective cover (14) is fixedly matched with the upper support beam (1), and the bottom is connected to the frame support beam. The two ends of the frame support beam are fixedly matched with the left support plate (3) and the right support plate (4).

6. The compact lower isolation environmentally friendly ring main unit switch according to claim 1, characterized in that: The grounding static contact (15) is connected to the frame supporting crossbeam.

7. The compact lower isolation environmentally friendly ring main unit switch according to claim 1, characterized in that: The number of the upper copper bar connection sockets (9) is the same as the number of the grounding static contacts (15).

8. The compact lower isolation environmentally friendly ring main unit switch according to claim 1, characterized in that: The axial movement of the three-station insulating operating shaft (12) drives the three-station knife switch (13) to contact the isolating static contact (11) and the grounding static contact (15).

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