Gas insulated switchgear and mobile substation
By designing an inflatable cabinet including support unit and air box, the safety hazards of cable joints in mobile box transformed vehicles, internal combustion arc pressure relief problems and safety risks caused by the vehicle body height are solved, and safe and fast connections, personnel safety guarantees and driving safety are improved.
Patent Information
- Application Number
- CN202421217558.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-05-30
AI Technical Summary
The inflatable cabinet of the existing mobile box transformer may cause the quick plug connector to be unplugged when power is delivered on site, which cannot meet the "five-defense" interlocking requirements, which poses safety hazards; at the same time, the lack of pressure relief channels for anti-internal combustion arc faults may cause injuries to people; the overall height of the vehicle body is too high, resulting in a high center of gravity, and there is a safety risk during driving, and the rescue task in a height-limited place cannot be achieved.
An inflatable cabinet is designed, including a support unit and an air box. The air box is fixedly installed on the support unit to form a first cable chamber, an inflatable chamber and a second cable chamber. The cable joint is arranged in each chamber and is equipped with a switch and a fuse. The weakening part is cut off when the pressure in the inflation chamber reaches a predetermined threshold to form a pressure relief channel, and the cooler device is used to cool the gas.
It realizes the safe and fast connection of cable joints, meets the requirements of "five defenses" interlocking, and reduces safety hazards; designs pressure relief channels to prevent internal combustion arc from harming personnel; the design of the inflatable cabinet reduces the height of the vehicle body, improves the center of gravity of the vehicle, enhances driving safety, and supports rescue tasks in height-limited places.
Smart Images
Figure CN222735662U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to an inflatable cabinet and a mobile substation. Background Art
[0002] Mobile substations such as mobile box-type transformers are used to quickly access temporary power supplies and bypass power supplies during power grid failure repairs, thereby effectively shortening power outage time for users.
[0003] Taking the mobile box transformer as an example, the inflatable cabinet used in the mobile box transformer adopts the standard ring network cabinet. The cable quick-plug connection sleeve is connected to the outlet sleeve of the standard cabinet with a cable. The cable quick-plug connection sleeve is installed at the lower part of the mobile box transformer. Directly plugging and unplugging the cable quick-plug connector during on-site power transmission may cause the quick-plug connector to be pulled out while powered, which cannot meet the requirements of the "five-protection" interlocking and lead to safety hazards. At the same time, the standard ring network cabinet configured in the mobile box transformer does not have a pressure relief channel to prevent internal arc faults. If an internal arc occurs in the cabinet, it may cause harm to personnel. The overall height of the current mobile box transformer body is relatively high, resulting in a high center of gravity of the vehicle. There are safety risks during vehicle driving. Rescue tasks in places with height restrictions will not be allowed and cannot be achieved. Utility Model Content
[0004] In order to overcome the above problems, the present application provides an inflatable cabinet, which includes:
[0005] A support unit, the support unit having a first side and a second side opposite to each other along a first direction, the first side being open, a back plate being arranged at the second side, the back plate being located in a plane perpendicular to the first direction, and the first side plate and the second side plate extending perpendicularly from the back plate toward the first side;
[0006] The air box is fixedly mounted to the supporting unit, and forms a first cable chamber and a second cable chamber opposite to each other along a first direction, so that a part of the air-filled chamber of the air box is located between the first cable chamber and the second cable chamber, the first cable chamber is close to the first side, and the second cable chamber is close to the second side, the first cable connector is arranged in the first cable chamber and extends into the air-filled chamber, the second cable connector is arranged in the second cable chamber and extends into the air-filled chamber, and the first cable connector, the switch and fuse arranged in the air box, and the second cable connector are electrically connected via a busbar.
[0007] Advantageously, the air box has a cavity for forming the portion of the inflatable chamber, the cavity having a first wall facing the first cable chamber, a second wall facing the second cable chamber, and a bottom wall connected between the first wall and the second wall, the first wall and the second wall extending parallel to the back plate, and when the air box is fixedly mounted to the support unit, the space between the second wall and the back plate forms the second cable chamber.
[0008] Advantageously, the support unit has a partition plate arranged between the first side plate and the second side plate, the partition plate is located in the first cable chamber and is parallel to the first side plate and the second side plate, the partition plate abuts against the first wall of the cavity along one side of the first direction, dividing the first cable chamber into several sub-chambers.
[0009] Advantageously, a weakened portion is provided on the second wall, which is configured to be cut off from the second wall when the pressure in the air-filled chamber reaches a predetermined threshold, so that the air-filled chamber is connected to the second cable chamber, so that the gas in the air-filled chamber can flow from the air-filled chamber to the second cable chamber.
[0010] Advantageously, a cooler is disposed on the outer side of the back plate, and the cooler is configured to cool the gas flowing to the second cable chamber.
[0011] Advantageously, the back plate has a plurality of openings, the cooler has a plurality of holes, and the plurality of openings are in fluid communication with the plurality of holes so that the gas can be discharged to the outside.
[0012] Advantageously, the first wall is provided with a plurality of through holes for receiving the first cable plug, the number of the plurality of through holes is a multiple of three, three through holes correspond to a sub-chamber of the first cable chamber, and the three through holes are arranged at three vertices of a virtual triangle or the three through holes are arranged in a row.
[0013] Advantageously, further comprising a door removably attached to the first side of the first cable chamber to close the first cable chamber.
[0014] Advantageously, the distance between the first wall and the door is not greater than 230 mm.
[0015] The present application also provides a mobile substation, which includes the inflatable cabinet as described above. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The above and other features and advantages of the exemplary embodiments of the present invention will become more apparent from the following detailed description in conjunction with the accompanying drawings, and the description and drawings are only for illustrative purposes and are not intended to limit the scope of the present invention in any way, wherein:
[0017] Figure 1 A front perspective view of an inflatable cabinet according to the present application is shown.
[0018] Figure 2 A rear perspective view of an inflatable cabinet according to the present application is shown with the back panel removed.
[0019] Figure 3 Shown is a front perspective view of an inflatable cabinet according to the present application, with the door removed.
[0020] Figure 4 A side perspective view of an inflatable cabinet according to the present application is shown.
[0021] Figure 5 A supporting unit of an inflatable cabinet according to the present application is shown.
[0022] Figure 6 The back plate of the support unit of the inflatable cabinet according to the present application is shown.
[0023] Figure 7 A front perspective view of a cabinet of a gas cabinet according to the present application is shown with electrical components removed.
[0024] Figure 8 A rear perspective view of a cabinet of a gas cabinet according to the present application is shown with electrical components removed.
[0025] Fig. 9 A perspective view showing an air box structure of an inflatable cabinet according to the present application.
[0026] Fig.10 Shows the electrical connections of cable connectors, switches and fuses. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical solution and advantages of the technical solution of the present disclosure clearer, the technical solution of the embodiment of the present disclosure will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present disclosure. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.
[0028] Compared to the embodiments shown in the drawings, feasible implementations within the scope of the present disclosure may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.
[0029] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. When the number of components is not specified, the number of components may be one or more; similarly, words such as "one", "the", "said" and the like do not necessarily indicate a quantitative limitation. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate the relative orientation relationship when the device is in use or the orientation relationship shown in the drawings. When the absolute position of the described object changes, the relative position relationship may also change accordingly.
[0030] Combine the following Figures 1 to 10 To describe the inflatable cabinet according to the present application.
[0031] Figure 1 The inflatable cabinet for a mobile box-changing vehicle is shown, and the inflatable cabinet is installed in the compartment of the mobile box-changing vehicle. The inflatable cabinet includes a support unit 1, such as Figure 5 As shown, it is mounted to the carriage of a mobile box car. The support unit 1 has a first side and a second side opposite to each other along a first direction, the first side is open, and a back plate 13 is arranged at the second side, the back plate is located in a plane perpendicular to the first direction, and the first side plate 11 and the second side plate 12 extend vertically from the back plate 13 toward the first side. The support unit also has a support rod 15 extending between the first side plate and the second side plate along a second direction perpendicular to the first direction, as described below.
[0032] Air box 2 (such as Fig. 9 As shown) is located above the support unit 1 and is fixedly mounted to the support unit 1, so that a first cable chamber 3, an air-filled chamber 4 and a second cable chamber 5 are formed along a first direction, the first cable chamber 3 is close to the first side, the second cable chamber 5 is close to the second side, and the air-filled chamber 4 is between the first cable chamber and the second cable chamber. Figure 7 and Figure 8 The air box is shown fixedly mounted to the support unit 1. Figure 2 and 3 As shown, the first cable connector 6 is arranged in the first cable chamber 3 and extends into the gas chamber, the second cable connector 7 is arranged in the second cable chamber and extends into the gas chamber, and the first cable connector, the switch and fuse arranged in the gas box, and the second cable connector are electrically connected via the busbar. The first cable chamber 3, the charging chamber 4, and the second cable chamber are arranged in Figure 4 It is schematically circled by a dotted frame.
[0033] The air box 2 has a cavity 21 for forming a part of the gas-filled chamber, the cavity 21 having a first wall 211 facing the first cable chamber, a second wall 212 facing the second cable chamber, and a bottom wall 213 connected between the first wall and the second wall, the first wall and the second wall extending parallel to the back plate. When the air box is fixedly mounted to the support unit, the bottom wall of the cavity rests on the support rod 15 of the support unit, and the space between the second wall and the back plate forms the second cable chamber 5.
[0034] The support unit 1 further includes a partition plate 14 disposed between the first side plate 11 and the second side plate 12. The partition plate 14 is located in the first cable chamber and is parallel to the first side plate 11 or the second side plate 12. The partition plate 14 abuts against the first wall 211 of the cavity along one side of the first direction, dividing the first cable chamber into a plurality of sub-chambers. Figure 5 In the example of FIG. 1 , two partition plates 14 are shown, thereby dividing the first cable chamber into three sub-chambers, of which only two are used, such as Figure 3 The first wall is provided with a plurality of through holes for receiving the first cable plug, the number of the plurality of through holes is a multiple of three, the three through holes correspond to a sub-chamber of the first cable chamber, and the three through holes are arranged at the three vertices of a virtual triangle. Figure 3 In the two sub-chambers, three first cable connectors 6 are arranged in each sub-chamber for quick connection plugs 8, such as Figure 1 The three first cable connectors 6 are arranged at the three vertices of a virtual triangle, thereby enabling current transformers to be installed on each first cable connector 6 without interfering with each other. Alternatively, the three through holes may also be arranged in a row, so that the three first cable connectors are arranged in a row.
[0035] A weakened portion 213 is provided on the second wall 212, and the weakened portion is configured to be cut off from the second wall when the pressure in the plenum chamber reaches a predetermined threshold, so that the plenum chamber is connected to the second cable chamber, so that the gas in the plenum chamber can expand from the plenum chamber to the second cable chamber. In one example, the weakened portion 213 can be in the form of a thin wall, which is much smaller than the thickness of the second wall. Of course, other forms of weakened portions can also be envisioned.
[0036] like Figure 6 As shown, a cooler 15 is provided on the outside of the back plate 13, and the cooler 15 is configured to cool the gas expanded to the second cable chamber. In an example, the cooler 15 is in the form of a plurality of porous plates, with a plurality of holes, and the back plate has a plurality of openings, so that the plurality of openings and the plurality of holes are fluidically connected, so that the gas can be discharged to the outside.
[0037] The door 9 is removably attached to the first side of the first cable chamber to close the first cable chamber. The distance between the first wall and the door is preferably no greater than 230 mm, thereby allowing for easy observation of whether the plug 8 is installed in place.
[0038] Fig.10 It is shown that the first cable connector 6, the switch and fuse arranged in the gas box, and the second cable connector 7 are electrically connected via a busbar.
[0039] The inflatable cabinet of the present application is applied to a miniaturized mobile box transformer vehicle. The lower support unit is divided into front and rear cable chambers, which facilitates the connection with the transformer cable, reduces the cable length, and reduces the wiring space. The cable quick-insert sleeve (cable connector) is directly installed on the first wall of the gas box and is located in the first cable chamber, saving power distribution costs.
[0040] The gas box is reasonably designed so that the distance from the first wall to the door of the quick-plug cable room is about 230mm, which makes it easy to observe whether the quick-plug connector is installed in place. At the same time, the through-core current transformer can also be installed on the three-phase quick-plug bushing. The quick-plug cable bushing can be arranged in a straight line or a triangle.
[0041] The internal arc fault pressure relief method is changed from the traditional downward pressure relief to the backward pressure relief. The weakening part is installed on the second wall of the gas box and located in the second cable room. The arc cooler device and the special pressure relief channel are designed to ensure that the internal arc gas is discharged outside the vehicle, thereby ensuring the safety of personnel.
[0042] The height of the lower support frame of the inflatable cabinet is much lower than that of the standard ring network cabinet. Combined with the reasonable layout and combination with the gas box, the lower part of the entire inflatable cabinet is divided into front and rear cable room compartments, realizing a miniaturized cabinet as a whole.
[0043] The inflatable cabinet of the present application can be used in a mobile substation to reduce the size of the mobile substation, thereby better realizing the rapid access of temporary power supply and bypass power supply. An example of such a mobile substation is a mobile box-type transformer vehicle, however, it is not limited to a mobile box-type transformer vehicle, as long as it can realize the rapid access of bypass power supply.
[0044] Although the present invention has been described in the specification and illustrated in the drawings with reference to various embodiments, those skilled in the art will appreciate that the above embodiments are merely preferred implementations, and certain technical features in the embodiments may not be necessary for solving specific technical problems, so that these technical features may be absent or omitted without affecting the solution of the technical problems or the formation of technical solutions; moreover, the features, elements and / or functions of one embodiment may be appropriately combined, coupled or coordinated with the features, elements and / or functions of one or more other embodiments, unless the combination, coupling or coordination is obviously not feasible.
Claims
1. An inflatable cabinet, characterized in that: The inflatable cabinet includes: A support unit, the support unit having a first side and a second side opposite to each other along a first direction, the first side being open, a back plate being arranged at the second side, the back plate being located in a plane perpendicular to the first direction, and the first side plate and the second side plate extending perpendicularly from the back plate toward the first side; The air box is fixedly mounted to the supporting unit, and forms a first cable chamber and a second cable chamber opposite to each other along a first direction, so that a part of the air-filled chamber of the air box is located between the first cable chamber and the second cable chamber, the first cable chamber is close to the first side, and the second cable chamber is close to the second side, the first cable connector is arranged in the first cable chamber and extends into the air-filled chamber, the second cable connector is arranged in the second cable chamber and extends into the air-filled chamber, and the first cable connector, the switch and fuse arranged in the air box, and the second cable connector are electrically connected via a busbar.
2. The inflatable cabinet according to claim 1, characterized in that: The air box has a cavity for forming the portion of the inflatable chamber, the cavity having a first wall facing the first cable chamber, a second wall facing the second cable chamber, and a bottom wall connected between the first wall and the second wall, the first wall and the second wall extending parallel to the back plate, and when the air box is fixedly mounted to the support unit, the space between the second wall and the back plate forms the second cable chamber.
3. The inflatable cabinet according to claim 2, characterized in that: The support unit has a partition plate arranged between the first side plate and the second side plate. The partition plate is located in the first cable chamber and is parallel to the first side plate and the second side plate. The partition plate abuts against the first wall of the cavity along one side of the first direction to divide the first cable chamber into several sub-chambers.
4. The inflatable cabinet according to claim 2, characterized in that: The second wall is provided with a weakened portion, which is configured to be cut off from the second wall when the pressure in the air-filled chamber reaches a predetermined threshold, so that the air-filled chamber is connected with the second cable chamber, so that the gas in the air-filled chamber can flow from the air-filled chamber to the second cable chamber.
5. The inflatable cabinet according to claim 4, characterized in that: A cooler is disposed on the outer side of the back plate, and the cooler is configured to cool the gas flowing to the second cable chamber.
6. The inflatable cabinet according to claim 5, characterized in that: The back plate has a plurality of openings, and the cooler has a plurality of holes, the plurality of openings being in fluid communication with the plurality of holes so that gas can be discharged to the outside.
7. The inflatable cabinet according to claim 3, characterized in that: The first wall is provided with a plurality of through holes for receiving the first cable plug, the number of the plurality of through holes is a multiple of three, the three through holes correspond to a sub-chamber of the first cable chamber, and the three through holes are arranged at three vertices of a virtual triangle or the three through holes are arranged in a row.
8. The inflatable cabinet according to claim 2, characterized in that: Also included is a door removably attached to the first side of the first cable compartment to close the first cable compartment.
9. The inflatable cabinet according to claim 8, characterized in that: The distance between the first wall and the door is no more than 230 mm.
10. A mobile substation, characterized in that: It comprises the inflatable cabinet as claimed in any one of claims 1 to 9.