Isolation circuit breaker switch module on environment-friendly ring main unit

Abstract

The utility model discloses an isolation circuit breaker switch module on an environment-friendly ring main unit, and particularly relates to the technical field of switches, the isolation circuit breaker switch module comprises a front mounting plate and a rear mounting plate, an upper contact seat, an operation main shaft, a circuit breaking piece and a wire inlet plate are jointly mounted between the front mounting plate and the rear mounting plate, the operation main shaft is located between the upper contact seat and the circuit breaking piece, and the wire inlet plate is located between the operation main shaft and the circuit breaking piece. The wire inlet plate is located on one side of the operation main shaft, a plurality of power connection heads are arranged on the wire inlet plate, a plurality of operation arms are arranged on the operation main shaft, a plurality of static contacts are installed on the upper contact seat, and a plurality of connection contacts are installed at the top of the circuit breaker. According to the vacuum arc-extinguishing chamber, when the top of the vacuum arc-extinguishing chamber is in contact with the bottom of the connecting contact, a circuit forms a closed loop, current is allowed to pass through to realize a power-on function, when the top of the vacuum arc-extinguishing chamber is separated from the bottom of the connecting contact, secondary circuit disconnection is realized, and the safety and the stability of operation are ensured while the use requirement of the switch is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to switch technical field more specifically, the utility model relates to a kind of environmental protection type ring main unit upper isolation circuit breaker switch module. BACKGROUND

[0002] Ring main unit is a set of power transmission and distribution electrical equipment, usually including high-voltage switchgear, which are installed in metal or non-metal insulated cabinet, or built as assembled interval type ring network power supply unit, its core components include load switch and fuse, these designs make ring main unit structure simple, small in size, low in cost, and can improve power supply parameters and performance, while ensuring the safety of power supply, ring main unit due to these advantages, in urban residential areas, high-rise buildings, large public facilities, factory enterprises and other load-intensive areas of distribution station and box-type substation have been widely used, is an important high-voltage electrical equipment.

[0003] At present, environmentally friendly gas (dry air) insulated metal-enclosed switchgear has high reliability, high safety, maintenance-free, environmental protection and low carbon, and other excellent performance, while the insulation performance of dry air is only about one-third of SF6 gas, which leads to the volume of traditional switch is larger, in addition, disconnecting switch is usually installed above circuit breaker switch, its structure is relatively complex, and the running stability is poor, and the maintenance cost is higher. SUMMARY

[0004] The environmental protection type ring main unit upper isolation circuit breaker switch module provided by the utility model solves the problems that the insulation performance of existing dry air is only about one-third of SF6 gas, which leads to the volume of traditional switch is larger, in addition, disconnecting switch is usually installed above circuit breaker switch, its structure is relatively complex, and the running stability is poor, and the maintenance cost is higher.

[0005] To achieve the above object, the utility model provides the following technical scheme: an environmental protection type ring main unit upper isolation circuit breaker switch module, comprising two front mounting plates and rear mounting plates, the front mounting plate and the rear mounting plate are jointly provided with an upper contact seat, an operating main shaft, a circuit breaking piece and a wire inlet plate between them, the operating main shaft is located between the upper contact seat and the circuit breaking piece, the wire inlet plate is located on one side of the operating main shaft, a plurality of electrical connectors are arranged on the wire inlet plate, a plurality of operating arms are arranged on the operating main shaft, a plurality of static contacts are arranged on the upper contact seat, a plurality of connecting contacts are arranged on the top of the circuit breaking piece, the connecting contacts are hinged to the bottom ends of the operating arms, the wire inlet plate and the static contacts are in movable contact with the top ends of the operating arms, the operating arms are electrified when the top ends of the operating arms are in contact with the wire inlet plate, and the operating arms are isolated from power when the top ends of the operating arms are in contact with the static contacts.

[0006] The circuit breaker includes a circuit breaker frame and a fixed cylinder. The two ends of the circuit breaker frame are fixedly connected to the front mounting plate and the rear mounting plate, respectively. The fixed cylinder is fixedly installed on the circuit breaker frame. The connecting contact head is installed through the top of the fixed cylinder. A vacuum interrupter is installed in the inner cavity of the fixed cylinder. The vacuum interrupter is slidably installed in the inner cavity of the fixed cylinder. When the top of the vacuum interrupter separates from the bottom of the connecting contact head, the circuit is disconnected, providing protection.

[0007] In a preferred embodiment, a limiting cylinder is fixedly installed on the operating spindle, and the operating arm is slidably sleeved within the inner cavity of the limiting cylinder.

[0008] In a preferred embodiment, the circuit breaker further includes a bottom cavity that is connected to a fixed cylinder, and a spring is disposed inside the bottom cavity and is fixedly connected to the bottom of the vacuum interrupter.

[0009] In a preferred embodiment, a through hole is provided on the side of the bottom cavity, and a fixing plate is slidably disposed inside the through hole. The fixing plate passes through the through hole and is connected to the bottom of the vacuum interrupter. The fixing plate is located between the vacuum interrupter and the spring.

[0010] In a preferred embodiment, a connecting rod is fixedly connected to the bottom of each vacuum interrupter. The connecting rod slides through the bottom of the cavity and is connected to a cam. A track is provided on the cam, and the connecting rod is slidably connected to the track. An insulating rod is sleeved on the bottom of the cam.

[0011] In a preferred embodiment, a plurality of skirts are evenly distributed on the insulating rod, and the skirts are fixedly fitted onto the insulating rod.

[0012] In a preferred embodiment, both the front mounting plate and the rear mounting plate are provided with mounting holes.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention features a vacuum interrupter. When the top of the vacuum interrupter contacts the bottom of the connecting contact, a closed circuit is formed, allowing current to flow and enabling energization. When the top of the vacuum interrupter separates from the bottom of the connecting contact, a secondary circuit disconnection is achieved. This ensures both the safety and stability of operation while meeting the requirements for switch use. Attached Figure Description

[0015] Figure 1 This is a side view of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 3 This utility model Figure 2 Enlarged view of the structure of section A in the middle.

[0018] Figure 4This is a top view of the structure of this utility model.

[0019] The attached diagram is labeled as follows: 1. Front mounting plate; 11. Rear mounting plate; 2. Inlet plate; 3. Connector; 4. Circuit breaker; 41. Fixing cylinder; 42. Connecting contact; 5. Upper contact seat; 6. Stationary contact; 7. Operating spindle; 71. Limiting cylinder; 72. Operating arm; 8. Vacuum interrupter; 81. Fixing plate; 9. Insulating rod; 91. Umbrella skirt; 92. Cam. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] Refer to the instruction manual appendix Figures 1 to 4 An environmentally friendly ring main unit isolating circuit breaker switch module includes two front mounting plates 1 and a rear mounting plate 11. An upper contact seat 5, an operating spindle 7, a circuit breaker 4, and an inlet plate 2 are jointly installed between the front mounting plates 1 and the rear mounting plate 11. The operating spindle 7 is located between the upper contact seat 5 and the circuit breaker 4. The inlet plate 2 is located on one side of the operating spindle 7. Multiple electrical connectors 3 are provided on the inlet plate 2. Multiple operating arms 72 are provided on the operating spindle 7. Multiple stationary contacts 6 are installed on the upper contact seat 5. Multiple connecting contacts 42 are installed on the top of the circuit breaker 4. The connecting contacts 42 are hinged to the bottom end of the operating arms 72. The inlet plate 2 and the stationary contacts 6 are in movable contact with the top end of the operating arms 72. When the top end of the operating arms 72 contacts the inlet plate 2, it is energized. When the top end of the operating arms 72 contacts the stationary contacts 6, it is isolated and de-energized.

[0022] The circuit breaker 4 includes a circuit breaker frame and a fixed cylinder 41. The two ends of the circuit breaker frame are fixedly connected to the front mounting plate 1 and the rear mounting plate 11, respectively. The fixed cylinder 41 is fixedly installed on the circuit breaker frame. The connecting contact 42 is installed through the top of the fixed cylinder 41. A vacuum interrupter 8 is installed in the inner cavity of the fixed cylinder 41. The vacuum interrupter 8 is slidably installed in the inner cavity of the fixed cylinder 41. When the top of the vacuum interrupter 8 is separated from the bottom of the connecting contact 42, the circuit is disconnected.

[0023] It should be noted that when the main shaft 7 rotates, it drives the operating arm 72 to rotate, so that the top of the operating arm 72 can contact the stationary contact 6 and the electrical contact 3 respectively. When the top of the operating arm 72 contacts the inlet plate 2, it is energized. When the top of the operating arm 72 contacts the stationary contact 6, it is isolated and de-energized. By sliding the vacuum interrupter 8 in the inner cavity of the fixed cylinder 41, when the top of the vacuum interrupter 8 contacts the bottom of the connecting contact 42, the circuit forms a closed loop, allowing current to pass through. When the top of the vacuum interrupter 8 separates from the bottom of the connecting contact 42, the circuit is disconnected to provide safety.

[0024] Furthermore, a limiting sleeve 71 is fixedly installed on the operating spindle 7, and the operating arm 72 is slidably sleeved in the inner cavity of the limiting sleeve 71.

[0025] In the above embodiment, when the operating spindle 7 rotates, the operating arm 72 slides in the inner cavity of the limiting cylinder 71, so that the bottom end of the operating arm 72 is always in contact with the top of the connecting contact head 42.

[0026] Furthermore, the circuit breaker 4 also includes a bottom cavity, which is connected to the fixed cylinder 41. A spring is installed inside the bottom cavity, and the spring is fixedly connected to the bottom of the vacuum interrupter 8.

[0027] In the above embodiment, the top of the vacuum interrupter 8 is in contact with the bottom of the connecting contact head 42 under normal conditions by means of a spring.

[0028] Furthermore, a through hole is provided on the side of the bottom cavity, and a fixing plate 81 is slidably disposed inside the through hole. The fixing plate 81 passes through the through hole and is connected to the bottom of the vacuum interrupter 8. The fixing plate 81 is located between the vacuum interrupter 8 and the spring.

[0029] In the above embodiment, the position of the vacuum interrupter 8 is determined by observing the movement of the fixing plate 81 along the through hole. When the fixing plate 81 contacts the bottom of the through hole, the top of the vacuum interrupter 8 separates from the bottom of the connecting contact head 42. When the fixing plate 81 contacts the top of the through hole, the top of the vacuum interrupter 8 contacts the connecting contact head 42.

[0030] Furthermore, each vacuum interrupter 8 is fixedly connected to a connecting rod at the bottom. The connecting rod slides through the bottom of the cavity and is connected to a cam 92. A track is provided on the cam 92, and the connecting rod is slidably connected to the track. An insulating rod 9 is sleeved on the bottom of the cam 92.

[0031] In the above embodiment, when the insulating rod 9 rotates, it drives the connecting rod to move along the track, so that the vacuum interrupter 8 can move downward.

[0032] Furthermore, multiple umbrella skirts 91 are evenly distributed on the insulating rod 9, and the umbrella skirts 91 are fixedly sleeved on the insulating rod 9.

[0033] In the above embodiments, the umbrella skirt 91 improves the electric field distribution on the insulating rod 9, making the electric field more uniform, reducing the phenomenon of electric field concentration, and improving safety.

[0034] Furthermore, both the front mounting plate 1 and the rear mounting plate 11 are provided with mounting holes.

[0035] In the above embodiment, the mounting holes facilitate the installation of the front mounting plate 1 and the rear mounting plate 11.

[0036] Working Principle: During operation, the main shaft 7 rotates, causing the operating arm 72 to rotate. The top of the operating arm 72 can then contact the stationary contact 6 and the contact head 3 respectively. When the top of the operating arm 72 contacts the inlet plate 2, power is supplied; when it contacts the stationary contact 6, power is cut off. After power is cut off, rotating the insulating rod 9 moves the connecting rod along the track, causing the vacuum interrupter 8 to move downwards. Simultaneously, the fixed plate 81 monitors the movement of the vacuum interrupter 8. When the fixed plate 81 contacts the bottom of the through hole, the top of the vacuum interrupter 8 separates from the bottom of the connecting contact head 42, breaking the circuit a second time for safety. When the fixed plate 81 contacts the top of the through hole, the top of the vacuum interrupter 8 contacts the connecting contact head 42, forming a closed circuit and allowing current to flow. By replacing SF6 gas with environmentally friendly dry air, the isolation circuit breaker does not require a complex large structure, making it safer, more environmentally friendly, and more stable.

[0037] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. An environmentally friendly ring main unit disconnect circuit breaker switch module, comprising two front mounting plates (1) and a rear mounting plate (11), characterized in that: The upper contact seat (5), operating spindle (7), circuit breaker (4), and inlet plate (2) are jointly installed between the front mounting plate (1) and the rear mounting plate (11). The operating spindle (7) is located between the upper contact seat (5) and the circuit breaker (4). The inlet plate (2) is located on one side of the operating spindle (7). The inlet plate (2) is provided with multiple electrical connectors (3). The operating spindle (7) is provided with multiple operating arms (72). Multiple stationary contacts (6) are installed on the upper contact base (5), and multiple connecting contacts (42) are installed on the top of the circuit breaker (4). The connecting contacts (42) are hinged to the bottom end of the operating arm (72). The inlet plate (2) and the stationary contacts (6) are in contact with the top end of the operating arm (72). When the top end of the operating arm (72) is in contact with the inlet plate (2), it is energized. When the top end of the operating arm (72) is in contact with the stationary contacts (6), it is isolated and de-energized. The circuit breaker (4) includes a circuit breaker frame and a fixed cylinder (41). The two ends of the circuit breaker frame are fixedly connected to the front mounting plate (1) and the rear mounting plate (11) respectively. The fixed cylinder (41) is fixedly installed on the circuit breaker frame. The connecting contact (42) is installed through the top of the fixed cylinder (41). A vacuum interrupter (8) is installed in the inner cavity of the fixed cylinder (41). The vacuum interrupter (8) is slidably installed in the inner cavity of the fixed cylinder (41). When the top of the vacuum interrupter (8) is separated from the bottom of the connecting contact (42), the circuit is disconnected.

2. The environmentally friendly ring main unit isolation circuit breaker switch module according to claim 1, characterized in that: The operating spindle (7) is fixedly installed with a limiting cylinder (71), and the operating arm (72) is slidably sleeved in the inner cavity of the limiting cylinder (71).

3. The environmentally friendly ring main unit isolation circuit breaker switch module according to claim 2, characterized in that: The circuit breaker (4) also includes a bottom cavity, which is connected to the fixed cylinder (41). A spring is provided inside the bottom cavity, and the spring is fixedly connected to the bottom of the vacuum interrupter (8).

4. The environmentally friendly ring main unit isolation circuit breaker switch module according to claim 3, characterized in that: A through hole is provided on the side of the bottom cavity, and a fixing plate (81) is slidably disposed inside the through hole. The fixing plate (81) passes through the through hole and is connected to the bottom of the vacuum interrupter (8). The fixing plate (81) is located between the vacuum interrupter (8) and the spring.

5. The environmentally friendly ring main unit isolation circuit breaker switch module according to claim 4, characterized in that: Each vacuum interrupter (8) is fixedly connected to a connecting rod at the bottom. The connecting rod slides through the bottom of the cavity and is connected to a cam (92). A track is provided on the cam (92). The connecting rod is slidably connected to the track. An insulating rod (9) is sleeved on the bottom of the cam (92).

6. The environmentally friendly ring main unit isolation circuit breaker switch module according to claim 5, characterized in that: The insulating rod (9) has a plurality of umbrella skirts (91) evenly distributed on it, and the umbrella skirts (91) are fixedly sleeved on the insulating rod (9).

7. The environmentally friendly ring main unit isolation circuit breaker switch module according to claim 6, characterized in that: Both the front mounting plate (1) and the rear mounting plate (11) are provided with mounting holes.

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