Inflatable circuit breaker and switch cabinet

Abstract

The utility model provides an inflatable circuit breaker and a switch cabinet, and relates to the technical field of electrical equipment, the inflatable circuit breaker comprises an air box, a circuit breaker body, a circuit breaker operating mechanism, a first sleeve and a second sleeve; the gas tank is filled with insulating gas; the circuit breaker body is arranged in the gas tank, and the circuit breaker operating mechanism is arranged outside the gas tank; one end of the first sleeve extends into the gas tank and is connected with one end of the circuit breaker body, and the other end of the first sleeve is located outside the gas tank; one end of the second sleeve extends into the gas tank and is connected with the other end of the circuit breaker body, and the other end of the second sleeve is located outside the gas tank; the parts, located outside the gas tank, of the first sleeve and the second sleeve are located on the same side of the gas tank and arranged at intervals. According to the utility model, the problem that the size of the switch cabinet is too large because the periphery of the circuit breaker needs too large insulation distance can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a gas-filled circuit breaker and a switch cabinet. Background Art

[0002] At present, electrical equipment such as switch cabinets are common equipment in electrical systems. In the design of some switch cabinets, air-insulated circuit breakers are generally used as switches to achieve the closing and disconnection of circuits.

[0003] However, the inventors realized that in actual use, in order to ensure the safety of the switch cabinet, the insulation distance around the air-insulated circuit breaker needs to meet certain electrical requirements. That is, when installing the circuit breaker, a certain distance needs to be maintained from the inner wall of the switch cabinet and other components, which results in a larger size of the switch cabinet. Utility Model Content

[0004] The problem solved by the utility model is how to improve the problem that the volume of the switch cabinet is too large due to the need for too large insulation distance around the circuit breaker.

[0005] In the first aspect, the utility model provides a gas-filled circuit breaker, comprising a gas box, a circuit breaker body, a circuit breaker operating mechanism, a first sleeve and a second sleeve; the gas box is used to be filled with insulating gas; the circuit breaker body is arranged in the gas box, and the circuit breaker operating mechanism is arranged outside the gas box; one end of the first sleeve extends into the gas box and is connected to one end of the circuit breaker body, and the other end of the first sleeve is located outside the gas box; one end of the second sleeve extends into the gas box and is connected to the other end of the circuit breaker body, and the other end of the second sleeve is located outside the gas box; the parts of the first sleeve and the second sleeve located outside the gas box are both located on the same side of the gas box and are arranged at intervals.

[0006] Optionally, the first sleeve and the second sleeve are arranged parallel to each other.

[0007] Optionally, a plurality of the first sleeves and a plurality of the second sleeves are provided, the plurality of the first sleeves are located in a first plane, the plurality of the second sleeves are located in a second plane, and the first plane and the second plane are arranged parallel to each other.

[0008] Optionally, the circuit breaker body includes a plurality of vacuum arc chambers, which are arranged in parallel and at intervals along a first direction, the vacuum arc chambers, the first bushings and the second bushings are arranged in one-to-one correspondence, the static contacts of the vacuum arc chambers are connected to the corresponding parts of the first bushings located in the gas box, the moving contacts of the vacuum arc chambers are connected to the corresponding parts of the second bushings located in the gas box, and the first direction is arranged perpendicular to the axes of the first bushings and the second bushings.

[0009] Optionally, the gas-filled circuit breaker further comprises a mounting bracket, wherein the mounting bracket is connected to the inner wall of the gas box, and the plurality of vacuum arc extinguishing chambers are mounted on the mounting bracket and spaced apart from the inner wall of the gas box.

[0010] Optionally, a projection of the circuit breaker operating mechanism on the side wall of the gas box is located within the contour of the side wall of the gas box.

[0011] Optionally, the junction between the first sleeve and the air box and the junction between the second sleeve and the air box are both sealed.

[0012] Optionally, the modified pneumatic circuit breaker further comprises an air pressure detection device, an air inlet end of the air pressure detection device extends into the interior of the air box, and a display end of the air pressure detection device is located outside the air box.

[0013] Optionally, the air pressure detection device and the circuit breaker operating mechanism are located on the same side of the gas box.

[0014] In a second aspect, the utility model provides a switch cabinet, comprising the gas-filled circuit breaker as described above.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] In the utility model, the gas box of the gas-filled circuit breaker is used to fill with insulating gas, the circuit breaker body is arranged in the gas box, and the circuit breaker operating mechanism is arranged outside the gas box, so that the circuit breaker body is surrounded by insulating gas, which can provide excellent electrical insulation performance, replace air, and greatly reduce the distance between the circuit breaker body and other components in the switch cabinet, thereby reducing the volume of the switch cabinet; at the same time, one end of the first sleeve extends into the gas box and is connected to one end of the circuit breaker body, and the other end of the first sleeve is located outside the gas box, and the first sleeve can be used to connect one end of the circuit breaker body with other components Electrical connection; one end of the second sleeve extends into the gas box and is connected to the other end of the circuit breaker body, and the other end of the second sleeve is located outside the gas box, and the other end of the circuit breaker body can be electrically connected to other components through the second sleeve; the first sleeve and the second sleeve located outside the gas box are both located on the same side of the gas box and are spaced apart, so that the inflatable circuit breaker can be electrically connected to other components only on the same side of the gas box through the first sleeve and the second sleeve, and the other side of the gas box does not need to be designed with an electrical connection structure, which effectively reduces the space occupied by the inflatable circuit breaker and further reduces the volume of the switch cabinet. In summary, compared with the existing air-insulated circuit breakers, the inflatable circuit breaker of the utility model can effectively improve the problem of excessive insulation distance around the circuit breaker, which leads to excessive volume of the switch cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a gas-filled circuit breaker according to an embodiment of the utility model;

[0018] Figure 2 for Figure 1 Sectional view at AA in the middle;

[0019] Figure 3 Another schematic diagram of a gas-filled circuit breaker according to an embodiment of the present invention.

[0020] Description of reference numerals:

[0021] 1. Gas box; 2. Circuit breaker body; 21. Vacuum interrupter; 3. Circuit breaker operating mechanism; 31. Operation panel; 4. First bushing; 5. Second bushing; 6. Mounting bracket; 7. Air pressure detection device; 71. Display terminal. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below in conjunction with the accompanying drawings. Although some embodiments of the utility model are shown in the accompanying drawings, it should be understood that the utility model can be implemented in various forms and should not be interpreted as being limited to the embodiments described here. On the contrary, these embodiments are provided to more thoroughly and completely understand the utility model. It should be understood that the drawings and embodiments of the utility model are only for exemplary purposes and are not used to limit the scope of protection of the utility model.

[0024] The term "including" and its variations used in this article are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present utility model are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0025] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0026] like Figure 1 , 2 As shown, an embodiment of the utility model provides a gas-filled circuit breaker, comprising a gas box 1, a circuit breaker body 2, a circuit breaker operating mechanism 3, a first sleeve 4 and a second sleeve 5; the gas box 1 is used to be filled with insulating gas; the circuit breaker body 2 is arranged in the gas box 1, and the circuit breaker operating mechanism 3 is arranged outside the gas box 1; one end of the first sleeve 4 extends into the gas box 1 and is connected to one end of the circuit breaker body 2, and the other end of the first sleeve 4 is located outside the gas box 1; one end of the second sleeve 5 extends into the gas box 1 and is connected to the other end of the circuit breaker body 2, and the other end of the second sleeve 5 is located outside the gas box 1; the parts of the first sleeve 4 and the second sleeve 5 located outside the gas box 1 are both located on the same side of the gas box 1 and are arranged at intervals.

[0027] In this embodiment, the insulating gas is sulfur hexafluoride. Sulfur hexafluoride has excellent insulation and arc extinguishing properties. It can withstand very high voltages even in a very small volume, and is very suitable for the insulation requirements of high-voltage power equipment. In addition, it can effectively extinguish arcs, reduce the thermal effects of arcs, and extend the service life of equipment. In other embodiments, nitrogen, carbon dioxide mixed gas, etc. can also be used as a substitute for sulfur hexafluoride.

[0028] In this embodiment, the first sleeve 4 and the second sleeve 5 are made of insulating material on the outside, and are provided with electrical connectors on the inside. In this way, the first sleeve 4 and the second sleeve 5 are electrically isolated on the outside, and the internal electrical connectors are used to connect with external components and the circuit breaker body 2.

[0029] In this embodiment, the circuit breaker operating mechanism 3 is an existing mature technology, which is widely used in power systems for controlling and protecting the on and off of circuits. This embodiment does not improve the structure of the circuit breaker operating mechanism 3 itself, so its specific structure will not be described in detail.

[0030] In this embodiment, according to actual working conditions, the first sleeve 4 and the second sleeve 5 can also be adjusted to be arranged around the air box 1.

[0031] In this embodiment, the gas box 1 of the gas-filled circuit breaker is used to fill the insulating gas, the circuit breaker body 2 is arranged in the gas box 1, and the circuit breaker operating mechanism 3 is arranged outside the gas box 1, so that the circuit breaker body 2 is surrounded by the insulating gas, which can provide excellent electrical insulation performance, replace air, and greatly reduce the distance between the circuit breaker body 2 and other components in the switch cabinet, thereby reducing the volume of the switch cabinet; at the same time, one end of the first sleeve 4 extends into the gas box 1 and is connected to one end of the circuit breaker body 2, and the other end of the first sleeve 4 is located outside the gas box 1, and the first sleeve 4 can realize the connection between one end of the circuit breaker body 2 and other components Electrical connection; one end of the second sleeve 5 extends into the gas box 1 and is connected to the other end of the circuit breaker body 2, and the other end of the second sleeve 5 is located outside the gas box 1, and the electrical connection between one end of the circuit breaker body 2 and other components can be achieved through the second sleeve 5; the first sleeve 4 and the second sleeve 5 located outside the gas box 1 are both located on the same side of the gas box 1 and are spaced apart, so that the inflatable circuit breaker can be electrically connected to other components only on the same side of the gas box 1 through the first sleeve 4 and the second sleeve 5, and the other sides of the gas box 1 do not need to be designed with an electrical connection structure, which effectively reduces the space occupied by the inflatable circuit breaker and further reduces the volume of the switch cabinet. In summary, compared with the existing air-insulated circuit breakers, the inflatable circuit breaker of the utility model can effectively improve the problem of excessive insulation distance around the circuit breaker resulting in excessive volume of the switch cabinet.

[0032] Optionally, the first sleeve 4 and the second sleeve 5 are arranged parallel to each other.

[0033] Specifically, Figure 1 , 3 As shown, the first sleeve 4 and the second sleeve 5 have the same structure, that is, the first sleeve 4 and the second sleeve 5 have the same shape and size; the two sleeves are extended in the transverse direction and are arranged parallel to each other.

[0034] In this optional embodiment, the first sleeve 4 and the second sleeve 5 are arranged in parallel to increase the stability of the equipment structure, symmetrically distribute the load, reduce deformation and displacement, especially the impact of vibration and external force, and improve durability.

[0035] Optionally, a plurality of the first sleeve 4 and the second sleeve 5 are provided, the plurality of first sleeves 4 are located in the first plane, the plurality of second sleeves 5 are located in the second plane, and the first plane and the second plane are arranged parallel to each other.

[0036] Specifically, Figure 3 As shown, there are three first sleeves 4 and three second sleeves 5, the three first sleeves 4 are located in the first plane, the three second sleeves 5 are located in the second plane, the first plane and the second plane are arranged parallel to each other, and the three first sleeves 4 and the three second sleeves 5 are arranged in one-to-one correspondence.

[0037] In this optional embodiment, the first sleeve 4 and the second sleeve 5 are located in different planes, which effectively utilizes the three-dimensional space, and can improve the device integration, especially in a compact installation space with limited space. At the same time, the first plane and the second plane are arranged parallel to each other, which enhances the electrical isolation effect, reduces interference between different potential planes, improves insulation, and ensures high voltage safety.

[0038] Optionally, the circuit breaker body 2 includes a plurality of vacuum arc chambers 21, and the plurality of vacuum arc chambers 21 are arranged in parallel and at intervals along a first direction. The vacuum arc chambers 21, the first bushing 4, and the second bushing 5 are arranged in one-to-one correspondence. The static contact of the vacuum arc chamber 21 is connected to the corresponding part of the first bushing 4 located in the gas box 1, and the moving contact of the vacuum arc chamber 21 is connected to the corresponding part of the second bushing 5 located in the gas box 1. The first direction is arranged perpendicular to the axis of the first bushing 4 and the axis of the second bushing 5.

[0039] In this embodiment, the first direction is perpendicular to the axis of the first sleeve 4 and the axis of the second sleeve 5 .

[0040] Specifically, Figure 2As shown, the circuit breaker body 2 includes three vacuum arc chambers 21, and the three vacuum arc chambers 21 are arranged in parallel and at intervals along a first direction. The vacuum arc chambers 21, the first bushing 4 and the second bushing 5 are arranged one by one, corresponding to the A phase, the B phase and the C phase of the circuit breaker body 2 respectively, that is, one vacuum arc chamber 21 is equipped with a first bushing 4 and a second bushing 5 respectively; wherein, the static contact of the vacuum arc chamber 21 is connected to the corresponding part of the first bushing 4 located in the gas box 1, specifically, the static contact of the vacuum arc chamber 21 is connected to the electrical connector of the corresponding part of the first bushing 4 located in the gas box 1 through a connecting row; the moving contact of the vacuum arc chamber 21 is connected to the corresponding part of the second bushing 5 located in the gas box 1, specifically, the moving contact of the vacuum arc chamber 21 is connected to the electrical connector of the corresponding part of the second bushing 5 located in the gas box 1 through a connecting row.

[0041] In this optional embodiment, multiple vacuum arc extinguishing chambers 21 independently process current, which can effectively improve arc extinguishing efficiency, enhance arc extinguishing ability, reduce arc time, protect equipment, and extend life. The three are arranged in parallel and at intervals, which can make full use of three-dimensional space and have a compact design, especially in space-limited occasions, to improve installation density and reduce space occupancy.

[0042] Optionally, the gas-filled circuit breaker further comprises a mounting bracket 6 , which is connected to the inner wall of the gas box 1 , and a plurality of vacuum arc extinguishing chambers 21 are mounted on the mounting bracket 6 and spaced apart from the inner wall of the gas box 1 .

[0043] Specifically, Figure 2 As shown, the mounting bracket 6 is connected to the inner wall of the gas box 1. Specifically, a plurality of mounting protrusions are provided on the inner wall of the gas box 1. The mounting bracket 6 is detachably connected to the plurality of mounting protrusions. The connection method between the two includes but is not limited to screw connection, snap connection or plug-in connection; a plurality of vacuum arc extinguishing chambers 21 are installed on the mounting bracket 6 and are spaced apart from the inner wall of the gas box 1.

[0044] In this optional embodiment, the vacuum arc chamber 21 can be arranged at a distance from the inner wall of the gas box 1 under the action of the mounting bracket 6, thereby avoiding the vacuum arc chamber 21 from contacting the inner wall of the gas box 1 to generate the risk of leakage.

[0045] Optionally, the projection of the circuit breaker operating mechanism 3 on the side wall of the gas box 1 is located within the contour range of the side wall of the gas box 1. In this way, the layout is compact, the circuit breaker operating mechanism 3 does not exceed the edge of the side wall of the gas box 1, the overall occupied area is reduced, it is suitable for space-constrained environments, and the installation is optimized.

[0046] Optionally, the junction between the first sleeve 4 and the air box 1 and the junction between the second sleeve 5 and the air box 1 are both sealed.

[0047] In this embodiment, a sealing ring is provided or a sealant is applied at the junction between the first sleeve 4 and the air box 1 and at the junction between the second sleeve 5 and the air box 1 to achieve sealing.

[0048] In this optional embodiment, after the junction between the first sleeve 4 and the gas box 1 and the junction between the second sleeve 5 and the gas box 1 are sealed, the insulating gas in the gas box 1 can be effectively prevented from overflowing, thereby reducing the impact on the electrical insulation performance of the inflatable circuit breaker.

[0049] Optionally, the pneumatic circuit breaker further comprises an air pressure detection device 7 , an air inlet end of the air pressure detection device 7 extends into the interior of the air box 1 , and a display end 71 of the air pressure detection device 7 is located outside the air box 1 .

[0050] In this embodiment, the air pressure detection device 7 is a barometer or a barometer. Figure 1 , 2 As shown, the air pressure detection device 7 is a barometer, the air inlet end of the barometer extends into the air box 1, and the display end 71 of the barometer is located outside the air box 1.

[0051] In this optional embodiment, the pressure gauge can monitor the air pressure in the air box 1 in real time and display it, so that the staff can understand the air pressure in the air box 1 and can promptly discover and repair it when the air box 1 leaks.

[0052] Optionally, the air pressure detection device 7 and the circuit breaker operating mechanism 3 are located on the same side of the gas box 1. In this way, the air pressure detection device 7 and the circuit breaker operating mechanism 3 are arranged on the same side, which not only optimizes the space occupation on other sides of the gas box 1, but also makes it convenient for the staff to operate and observe the air pressure in the gas box 1 on the same side.

[0053] Another embodiment of the utility model provides a switch cabinet, comprising the gas-filled circuit breaker as described above.

[0054] In this embodiment, the switch cabinet also includes a cabinet body, the gas box 1 of the pneumatic circuit breaker is fixed inside the cabinet body, and the display end 71 of the air pressure detection device 7 of the pneumatic circuit breaker is embedded in the side wall of the cabinet body; at the same time, the operation panel 31 of the circuit breaker operating mechanism 3 of the pneumatic circuit breaker is embedded in the side wall of the cabinet body.

[0055] In this embodiment, the switch cabinet has the same beneficial effects as the above-mentioned gas-filled circuit breaker relative to the prior art, so they will not be described in detail here.

[0056] The reader should understand that in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0057] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A gas-filled circuit breaker, characterized in that: The invention comprises a gas box (1), a circuit breaker body (2), a circuit breaker operating mechanism (3), a first bushing (4) and a second bushing (5); the gas box (1) is used for filling with insulating gas; the circuit breaker body (2) is arranged in the gas box (1), and the circuit breaker operating mechanism (3) is arranged outside the gas box (1); one end of the first bushing (4) extends into the gas box (1) and is connected to one end of the circuit breaker body (2), and the other end of the first bushing (4) is located outside the gas box (1); one end of the second bushing (5) extends into the gas box (1) and is connected to the other end of the circuit breaker body (2), and the other end of the second bushing (5) is located outside the gas box (1); the parts of the first bushing (4) and the second bushing (5) located outside the gas box (1) are both located on the same side of the gas box (1) and are arranged at intervals.

2. The gas-filled circuit breaker according to claim 1, characterized in that: The first sleeve (4) and the second sleeve (5) are arranged parallel to each other.

3. The gas-filled circuit breaker according to claim 1 or 2, characterized in that: The first sleeve (4) and the second sleeve (5) are both provided in plurality, the plurality of the first sleeves (4) are located in a first plane, the plurality of the second sleeves (5) are located in a second plane, and the first plane and the second plane are arranged parallel to each other.

4. The gas-filled circuit breaker according to claim 1, characterized in that: The circuit breaker body (2) comprises a plurality of vacuum arc extinguishing chambers (21), the plurality of vacuum arc extinguishing chambers (21) are arranged in parallel and at intervals along a first direction, the vacuum arc extinguishing chambers (21), the first bushings (4) and the second bushings (5) are arranged in one-to-one correspondence, the static contacts of the vacuum arc extinguishing chambers (21) are connected to the corresponding part of the first bushings (4) located in the gas box (1), the moving contacts of the vacuum arc extinguishing chambers (21) are connected to the corresponding part of the second bushings (5) located in the gas box (1), and the first direction is arranged perpendicularly to the axis of the first bushing (4) and the axis of the second bushing (5).

5. The gas-filled circuit breaker according to claim 4, characterized in that: It also comprises a mounting bracket (6), wherein the mounting bracket (6) is connected to the inner wall of the gas box (1), and a plurality of vacuum arc extinguishing chambers (21) are mounted on the mounting bracket (6) and spaced apart from the inner wall of the gas box (1).

6. The gas-filled circuit breaker according to claim 1, characterized in that: The projection of the circuit breaker operating mechanism (3) on the side wall of the gas box (1) is located within the contour range of the side wall of the gas box (1).

7. The gas-filled circuit breaker according to claim 1, characterized in that: The junction between the first sleeve (4) and the air box (1) and the junction between the second sleeve (5) and the air box (1) are both sealed.

8. The gas-filled circuit breaker according to claim 1, characterized in that: It also comprises an air pressure detection device (7), the air inlet end of the air pressure detection device (7) extends into the interior of the air box (1), and the display end (71) of the air pressure detection device (7) is located outside the air box (1).

9. The gas-filled circuit breaker according to claim 8, characterized in that: The air pressure detection device (7) and the circuit breaker operating mechanism (3) are located on the same side of the air box (1).

10. A switch cabinet, characterized in that: It comprises a gas-filled circuit breaker as claimed in any one of claims 1 to 9.

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