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CN-122026246-A - High-altitude double-grounding inflatable cabinet air box structure

CN122026246ACN 122026246 ACN122026246 ACN 122026246ACN-122026246-A

Abstract

The high-altitude double-grounding inflatable cabinet air box structure comprises an air box formed by connecting a plurality of plates, insulating air is filled in the air box, the air box is divided into an upper air box, a middle air box and a lower air box along the height direction, a first grounding system is arranged in the upper air box, the first grounding system is a two-station grounding switch and comprises a first guide sleeve and a first conductive rod, one end of the first guide sleeve is provided with an insulating blocking structure, the first conductive rod can only move in a single direction, a second grounding system is arranged in the middle air box, the second grounding system is a three-station isolating switch, the three-station isolating switch comprises a second guide sleeve and a second conductive rod, and two ends of the second guide sleeve are open, so that the second conductive rod can move in two opposite directions. According to the invention, two sets of grounding systems are arranged, and when one set of grounding system fails due to reasons, the other set of grounding system can still normally operate, so that personal safety is ensured.

Inventors

  • ZHONG YIWEN
  • ZHU ZHAOMIN
  • CHEN YANG
  • CAI YU
  • ZHANG LIQIANG
  • LUO XUN
  • YU HAISHENG
  • ZHANG HAOMENG

Assignees

  • 上海置信日港电气有限公司
  • 上海置信电气非晶有限公司

Dates

Publication Date
20260512
Application Date
20260202

Claims (10)

  1. 1. The utility model provides a high altitude double ground connection inflatable cabinet gas tank structure, includes the gas tank that comprises a plurality of plate interconnect, be filled with insulating gas in the gas tank, its characterized in that: the air box is divided into an upper air box (A), a middle air box (B) and a lower air box (C) along the height direction by a partition plate; a first grounding system (13) is arranged in the upper air box (A), the first grounding system (13) is a two-station grounding switch, the two-station grounding switch comprises a first guide sleeve (1303) and a first conductive rod (1304) which can axially penetrate through the first guide sleeve (1303), one end of the first guide sleeve (1303) is provided with an insulating plugging structure, and the first conductive rod (1304) can only move in a single direction away from the insulating plugging structure; The middle air box (B) is internally provided with a second grounding system (15), the second grounding system (15) is a three-station isolating switch, the three-station isolating switch comprises a second guide sleeve (1503) and a second conductive rod (1504) which can axially penetrate through the second guide sleeve (1503), and two ends of the second guide sleeve (1503) are open, so that the second conductive rod (1504) can move along the second guide sleeve (1503) in two opposite directions.
  2. 2. The high-altitude double-grounding gas-filled cabinet gas tank structure according to claim 1, wherein the first grounding system (13) further comprises a two-station switching mechanism (1301) arranged on the outer side of the upper front plate (3) of the upper gas tank (a), and a first transmission shaft (1302) connected with the two-station switching mechanism (1301) and penetrating the upper front plate (3) of the upper gas tank (a) to extend into the upper gas tank (a) for driving the first conductive rod (1304).
  3. 3. The high altitude double ground-connected gas tank structure of claim 1, wherein the insulating plugging structure comprises a threaded sleeve (1307) provided at an end of the first guide sleeve (1303).
  4. 4. The high-altitude double-grounding gas-filled cabinet gas tank structure according to claim 1, wherein the second grounding system (15) further comprises a three-station switching mechanism (1501) arranged on the outer side of the middle front plate (4) of the middle gas tank (B), and a second transmission shaft (1502) connected with the three-station switching mechanism (1501) and penetrating the middle front plate (4) of the middle gas tank (B) and extending into the middle gas tank (B) for driving the second conducting rod (1504).
  5. 5. The high-altitude double-grounding gas tank structure of claim 1, wherein a connecting sleeve (19) leading to a lower gas tank (C) is connected to the lower end of the second guide sleeve (1503).
  6. 6. The high-altitude double-grounding gas-filled cabinet gas tank structure according to claim 1, wherein the lower end of the connecting sleeve (19) is connected with one side of the outlet line (18), and the other side of the outlet line (18) is connected with the outlet sleeve (20) for connecting components outside the gas tank.
  7. 7. The high altitude double-grounded inflatable cabinet air box structure according to claim 1, wherein the sealed air box further comprises a reinforcing structure comprising an upper front plate (3), a middle front plate (4), a lower front plate (5) and a rear plate (6) with a thickness greater than that of the side plates.
  8. 8. The high altitude double ground connection air tank structure of claim 7, wherein the reinforcing structure further comprises reinforcing ribs provided at left and right side plates of the upper air tank (a) and reinforcing ribs provided at left and right side plates of the middle air tank (B).
  9. 9. The high-altitude double-grounding inflatable cabinet air box structure according to claim 8 is characterized in that the reinforcing ribs arranged on the left side plate and the right side plate of the upper air box (A) are transversely arranged along the width direction of the side plates, and a plurality of common reinforcing ribs (8) are longitudinally arranged between the two reinforcing ribs (7) along the height direction of the side plates.
  10. 10. The high-altitude double-grounding inflatable cabinet air box structure according to claim 1, wherein a window is formed in a lower front plate (5) of the lower air box (C) for installing a heat-dissipating aluminum plate (9).

Description

High-altitude double-grounding inflatable cabinet air box structure Technical Field The invention relates to the technical field of electrical equipment, in particular to a high-altitude double-grounding gas tank structure of a gas-filled cabinet. Background The inflatable bus equipment cabinet is key equipment in an electric power system, and is widely applied to the advantages of compact structure, high reliability, no environmental influence and the like. The core component is a sealed air box filled with insulating medium, and the sealed air box is used for ensuring reliable insulation of conductors such as buses, switch elements and the like. As power construction expands to high altitude areas such as western plateaus, conventional gas tank structures face the following serious challenges: And the risk of single-point grounding at high altitude is that the air in the high altitude area is thin, the air pressure is low, and the insulation strength of the air is obviously reduced. Conventional inflatable bus bar apparatus cabinets typically have only one main ground terminal at the bottom or side wall of the cabinet. Once the ground lead breaks, the connecting bolt loosens or corrodes, the whole gas tank loses ground protection, and there is a very high risk of electric shock. The structural strength of the high-altitude gas tank is that the relative pressure difference between the inside and the outside of the gas tank is usually 0.03-0.05MPa under the standard atmospheric pressure environment. Under the high altitude environment, the pressure difference between the inside and the outside of the box body is increased to about 0.07MPa due to the reduced external atmospheric pressure. The mechanical structural strength of the air box sheet metal can be required to be higher, and if the strength is insufficient, the air box body has the risk of deformation or weld cracking. Disclosure of Invention In order to solve the defects in the prior art, the invention provides a high-altitude double-grounding inflatable cabinet gas tank structure, which ensures that the inflatable cabinet gas tank is always in a grounding state through a double-grounding system, ensures the safety of maintenance staff and solves the problem that single-point grounding has electric shock risk. The invention adopts the following technical scheme that the high-altitude double-grounding inflatable cabinet air box structure comprises an air box formed by interconnecting a plurality of plates, and insulating gas is filled in the air box, and is characterized in that: the air box is divided into an upper air box, a middle air box and a lower air box along the height direction by a partition plate; The upper air box is internally provided with a first grounding system, the first grounding system is a two-station grounding switch, the two-station grounding switch comprises a first guide sleeve and a first conductive rod which can axially penetrate through the first guide sleeve, and one end of the first guide sleeve is provided with an insulating plugging structure, so that the first conductive rod can only move in a single direction away from the insulating plugging structure; The middle air box is internally provided with a second grounding system, the second grounding system is a three-station isolating switch, the three-station isolating switch comprises a second guide sleeve and a second conductive rod which can axially penetrate through the second guide sleeve, and two ends of the second guide sleeve are open, so that the second conductive rod can move along the second guide sleeve towards two opposite directions. Further, the first grounding system further comprises a two-station switching mechanism arranged on the outer side of the upper front plate of the upper air box, and a first transmission shaft which is connected with the two-station switching mechanism, penetrates through the upper front plate of the upper air box, stretches into the upper air box and is used for driving the first conducting rod. Further, the insulating plugging structure comprises a threaded sleeve arranged at the end part of the first guide sleeve. Further, the second grounding system further comprises a three-station switching mechanism arranged on the outer side of the middle front plate of the middle air box, and a second transmission shaft which is connected with the three-station switching mechanism, penetrates through the middle front plate of the middle air box, stretches into the middle air box and is used for driving the second conducting rod. Further, the lower end of the second guide sleeve is connected with a connecting sleeve leading to the lower air box. Further, the lower end of the connecting sleeve is connected with one side of the outlet line, and the other side of the outlet line is connected with the outlet sleeve and used for connecting components outside the air box. Further, the sealed gas tank further comprises a reinforcing structu