Environment-friendly gas insulation ring main unit

Abstract

The utility model relates to an environment-friendly gas insulation ring main unit which comprises a cabinet body, an inflation chamber is arranged in the cabinet body, the inner side of the inflation chamber is filled with C4F7N gas or C5F10O gas, a static contact is arranged on the upper side of the inflation chamber, a plurality of groups of vacuum arc-extinguishing chambers are arranged on the inner side of the inflation chamber at equal intervals, the vacuum arc-extinguishing chambers are flexibly connected with moving contacts capable of being matched with the static contact, and the moving contacts are connected with the static contact. And the lower side of the inflation chamber is provided with an on-off mechanism matched with the lower end of the vacuum arc-extinguishing chamber. According to the environment-friendly gas insulation ring main unit, C4F7N gas or C5F10O gas is introduced into the inflation chamber, emission of greenhouse gas can be reduced to the maximum extent, the insulation performance is higher, the size of the ring main unit can be made to be smaller so that the ring main unit can be suitable for different occasions, and the practicability of the cabinet body is improved.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, in particular to an environmentally friendly gas insulated ring network cabinet. Background Art

[0002] At present, conventional insulating switchgear is roughly divided into two categories: gas insulated switchgear and solid insulated switchgear. For gas insulated switchgear, the insulating gas in the gas box is dry air or SF6 gas. However, SF6 gas is one of the six greenhouse gases recognized internationally. Its greenhouse effect is large and its attenuation period is long. Especially when the gas in the switchgear leaks, it will have a great impact on the environment. The insulation effect of dry air is not as good as SF6 gas, which makes the switchgear larger and its use is limited.

[0003] Therefore, switch cabinets that use environmentally friendly gas as the insulating medium have become a future development trend. However, the interior of environmentally friendly gas switch cabinets on the market is mainly filled with dry air or SF6 insulating gas. In order to reduce the greenhouse effect and reduce the size of the switch cabinet, a ring main unit that replaces dry air or SF6 gas is urgently needed. Utility Model Content

[0004] The purpose of the utility model is to provide an environmentally friendly gas insulated ring main unit with a simple structure and reasonable design in order to solve the above problems.

[0005] The utility model discloses an environmentally friendly gas insulated ring network cabinet, comprising a cabinet body, a gas-filled chamber is arranged in the cabinet body, and the inner side of the gas-filled chamber is filled with C4F7N gas or C5F 10 O gas, a static contact is arranged on the upper side of the gas-filled chamber, a plurality of vacuum interrupter chambers are equidistantly arranged on the inner side of the gas-filled chamber, a moving contact which can cooperate with the static contact is softly connected on the vacuum interrupter chamber, and a switching mechanism which cooperates with the lower end of the vacuum interrupter chamber is arranged on the lower side of the gas-filled chamber.

[0006] The utility model discloses an environmentally friendly gas insulated ring network cabinet, wherein the on-off mechanism comprises a second circuit breaker shaft, a plurality of positioning members are sleeved on the outer side of the second circuit breaker shaft, the positioning members are fixedly mounted on the side wall of the inflation chamber, an insulating pull rod is mounted on the lower side of the vacuum arc extinguishing chamber, and a pulling assembly on the second circuit breaker shaft can drive the insulating pull rod to move.

[0007] The utility model discloses an environmentally friendly gas insulated ring network cabinet, wherein the pulling component comprises a rotating plate, the rotating plate is fixedly mounted on a second circuit breaker shaft, an arc groove is opened on the rotating plate, an insulating movable part is movably clamped inside the arc groove, and the insulating movable part is connected to an insulating pull rod.

[0008] The utility model discloses an environmentally friendly gas insulated ring network cabinet, wherein the lower end of the gas-filled chamber is provided with the same number of incoming line bushings as that of the vacuum interrupter chamber, the incoming line bushings are electrically connected to the copper rods, and the copper rods are connected to the vacuum interrupter chambers through second soft connections.

[0009] The utility model discloses an environmentally friendly gas insulated ring network cabinet, wherein the second flexible connection sleeve is arranged on the insulating pull rod, and a compression spring is installed on the insulating pull rod and below the second flexible connection, and the compression spring tightly presses the second flexible connection to the power inlet end of the vacuum arc extinguishing chamber.

[0010] The utility model discloses an environmentally friendly gas insulated ring network cabinet, wherein an outlet bushing is installed on the upper part of the gas-filled chamber, and the outlet bushing is electrically connected to a static contact.

[0011] The utility model discloses an environmentally friendly gas insulated ring network cabinet, wherein a first circuit breaker shaft is movably mounted on the side wall of the gas-filled chamber, a moving contact is fixedly sleeved on the first circuit breaker shaft, the moving contact can be cooperatively connected with a first flexible connection, and the first flexible connection is connected to an output terminal on the upper side of a vacuum arc extinguishing chamber.

[0012] The utility model is different from the prior art in that the utility model is an environmentally friendly gas insulated ring network cabinet in which C4F7N gas or C5F 10 O gas, which can minimize greenhouse gas emissions and has higher insulation performance, making the ring network cabinet smaller in size to suit different occasions and improve the practicality of the cabinet.

[0013] The following is a further description of an environmentally friendly gas insulated ring main unit of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of an environmentally friendly gas insulated ring main unit of the utility model;

[0015] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0016] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0017] The markings in the figure are as follows: 1-cabinet; 2-inflatable chamber; 3-incoming bushing; 4-copper rod; 5-vacuum arc extinguishing chamber; 6-outgoing bushing; 7-static contact; 8-moving contact; 9-first circuit breaker shaft; 10-first flexible connection; 11-power output terminal; 12-power input terminal; 13-second flexible connection; 14-compression spring; 15-insulating pull rod; 16-arc groove; 17-insulating movable part; 18-turn plate; 19-second circuit breaker shaft; 20-positioning part. DETAILED DESCRIPTION

[0018] The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0019] Example

[0020] like Figure 1 As shown, the utility model provides an environmentally friendly gas insulated ring main unit, comprising a cabinet body 1, a gas-filled chamber 2 is arranged in the cabinet body 1, and the inner side of the gas-filled chamber 2 is filled with C4F7N (C4) gas or C5F 10 O(C5) gas.

[0021] Multiple groups of vacuum interrupter chambers 5 are equidistantly arranged in the middle of the inner side of the gas chamber 2, and three groups are arranged in this embodiment. The upper side of the vacuum interrupter chamber 5 is electrically connected to the power output terminal 11, and the power output terminal 11 is connected to the first soft connection 10 matched with the moving contact 8. The moving contact 8 is located on the upper side of the vacuum interrupter chamber 5, and the moving contact 8 is fixedly sleeved on the first circuit breaker shaft 9. The first circuit breaker shaft 9 is movably mounted on the side wall of the gas chamber 2, and can drive the moving contact 8 to rotate.

[0022] like Figure 2 As shown, an outlet bushing 6 is installed on the upper part of the gas-filled chamber 2, and the outlet bushing 6 is electrically connected to the stationary contact 7. The moving contact 8 can be in contact with the stationary contact 7 when rotating.

[0023] like Figure 3 As shown, a switching mechanism is installed at the lower part of the gas chamber 2, and the switching mechanism includes a second circuit breaker shaft 19, and a plurality of positioning members 20 are sleeved on the outer side of the second circuit breaker shaft 19, and the positioning members 20 are fixedly mounted on the side wall of the gas chamber 2. An insulating pull rod 15 is installed on the lower side of the vacuum arc chamber 5, and the pulling assembly on the second circuit breaker shaft 19 can drive the insulating pull rod 15 to move. The pulling assembly includes a rotating plate 18, and the rotating plate 18 is fixedly mounted on the second circuit breaker shaft 19. An arc groove 16 is provided on the rotating plate 18, and an insulating movable part 17 is movably connected to the inner side of the arc groove 16, and the insulating movable part 17 is connected to the insulating pull rod 15. The second circuit breaker shaft 19 can control the switching of the vacuum arc chamber 5, making the power transmission safer and more stable.

[0024] like Figure 1 and Figure 3As shown, the lower end of the gas chamber 2 is equipped with the same number of incoming bushings 3 as the vacuum arc chamber 5. When in use, the incoming bushings 3 are connected to the high-voltage transmission end. The incoming bushings 3 are electrically connected to the lower end of the copper rod 4. The upper end of the copper rod 4 is electrically connected to the second flexible connection 13, which is sleeved on the insulating pull rod 15. When in use, the copper rod 4 can be well connected to the vacuum arc chamber 5 through the second flexible connection 13. A compression spring 14 is installed on the insulating pull rod 15 and below the second flexible connection 13. The compression spring 14 can make the second flexible connection 13 tightly pressed against the power inlet end 12 of the vacuum arc chamber 5, increase the pressure between the two, and make the contact better.

[0025] The utility model is an environmentally friendly gas insulated ring network cabinet. The gas chamber 2 of the cabinet body 1 is filled with C4 or C5 gas. C4 or C5 gas is a new type of environmentally friendly insulating gas. Its insulation performance is twice that of SF6, and its greenhouse effect potential (GWP) is less than one tenth of SF6. It has low greenhouse effect, no damage to the ozone layer, and no biological toxicity. It has a low liquefaction temperature and a wide range of applications. It has strong heat dissipation capacity and is not flammable or explosive. It has high insulation strength and is compatible with commonly used materials for equipment. It has good arc extinguishing performance. Filling C4 or C5 gas in the gas chamber 2 can make the ring network cabinet smaller in size, so that it can be used in different occasions and improve the practicality of the cabinet.

[0026] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. An environmentally friendly gas insulated ring main unit, Features: The cabinet includes a gas-filled chamber, the inner side of which is filled with C 4 F 7 N gas or C 5 F 10 O gas, a static contact is arranged on the upper side of the gas-filled chamber, a plurality of vacuum interrupter chambers are equidistantly arranged on the inner side of the gas-filled chamber, a moving contact which can cooperate with the static contact is softly connected on the vacuum interrupter chamber, and a switching mechanism which cooperates with the lower end of the vacuum interrupter chamber is arranged on the lower side of the gas-filled chamber.

2. An environmentally friendly gas insulated ring main unit according to claim 1, Features: The on-off mechanism includes a second circuit breaker shaft, a plurality of positioning members are sleeved on the outer side of the second circuit breaker shaft, the positioning members are fixedly mounted on the side wall of the inflation chamber, an insulating pull rod is mounted on the lower side of the vacuum arc extinguishing chamber, and the pulling assembly on the second circuit breaker shaft can drive the insulating pull rod to move.

3. An environmentally friendly gas insulated ring main unit according to claim 2, Features: The pulling assembly comprises a rotating plate, which is fixedly mounted on the second circuit breaker shaft. An arc groove is provided on the rotating plate. An insulating movable part is movably clamped inside the arc groove. The insulating movable part is connected to the insulating pull rod.

4. The environmentally friendly gas insulated ring main unit according to claim 1, Features: The lower end of the gas-filled chamber is provided with the same number of incoming bushings as that of the vacuum interrupter chamber. The incoming bushings are electrically connected to the copper rods, and the copper rods are connected to the vacuum interrupter chambers through the second flexible connection.

5. The environmentally friendly gas insulated ring main unit according to claim 4, Features: The second flexible connection is sleeved on the insulating pull rod, and a compression spring is installed on the insulating pull rod and below the second flexible connection. The compression spring presses the second flexible connection tightly against the power inlet end of the vacuum arc chamber.

6. The environmentally friendly gas insulated ring main unit according to claim 1, Features: An outlet bushing is installed on the upper part of the inflation chamber, and the outlet bushing is electrically connected to the static contact.

7. The environmentally friendly gas insulated ring main unit according to claim 1, Features: A first circuit breaker shaft is movably mounted on the side wall of the inflation chamber, a moving contact is fixedly sleeved on the first circuit breaker shaft, the moving contact can be matched and connected with a first flexible connection, and the first flexible connection is connected to the power output terminal on the upper side of the vacuum interrupter chamber.

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