CN-122000796-A - Double-gas-tank structure high-current switch cabinet conductive connection device and installation method

CN122000796ACN 122000796 ACN122000796 ACN 122000796ACN-122000796-A

Abstract

The invention discloses a double-gas-tank structure heavy-current switch cabinet wall bushing conductive connection device and an installation method, wherein the double-gas-tank structure heavy-current switch cabinet wall bushing conductive connection device comprises a first conductive connection unit, a second conductive connection unit and an outer conductive connection unit, wherein the first conductive connection unit is arranged on a gas tank, the second conductive connection unit is arranged on a circuit breaker, the first conductive connection unit is connected with the second conductive connection unit and conducted, the outer conductive connection unit is arranged on the peripheries of the first conductive connection unit and the second conductive connection unit and is connected and fastened with the first conductive connection unit and the second conductive connection unit.

Inventors

GE CHUNMING
CAI CHANGSHENG
YANG KAIKAI
JING CHENGCHENG

Assignees

上海大华电器设备有限公司

Dates

Publication Date: 20260508
Application Date: 20251031

Claims (8)

1. The utility model provides a heavy current switch cabinet wall bushing conductive connection device of two gas tank structures, its characterized in that includes first conductive connection unit, second conductive connection unit and outside conductive connection unit, first conductive connection unit sets up on the gas tank, second conductive connection unit sets up on the circuit breaker, and first conductive connection unit is connected and is switched on with the conductive connection unit of second, outside conductive connection unit sets up in the periphery of first conductive connection unit and the conductive connection unit of second and is connected the fastening with first conductive connection unit and the conductive connection unit of second.
2. The device for electrically connecting a wall bushing of a double-air box structure high-current switch cabinet according to claim 1, wherein the first electrically conductive connection unit comprises a first electrically conductive connection block and a first fastening component, one end of the first electrically conductive connection block is mounted on the wall bushing, and the first electrically conductive connection block is fixed with the wall bushing by matching with the first fastening component.
3. The high-current switch cabinet wall bushing conductive connecting device with the double-air-box structure according to claim 2, wherein the first conductive connecting unit further comprises a first spring contact finger and a middle core conductive connecting sleeve, the middle core conductive connecting sleeve is mounted on the first conductive connecting block, the first spring contact finger is sleeved on the middle core conductive connecting sleeve and the first conductive connecting block, the middle core conductive connecting sleeve is adsorbed at the bottom of the upper end of the first conductive connecting block under the pressure of the first spring contact finger, and the sliding middle core conductive connecting sleeve can be partially sleeved on the second conductive connecting unit to connect and conduct the first conductive unit and the second conductive unit.
4. The device for electrically connecting a wall bushing of a heavy-current switchgear cabinet with a double-gas tank structure according to claim 3, wherein the second electrically conductive connection unit comprises a second electrically conductive connection block and a second fastening assembly, and the second electrically conductive connection block is assembled on the solid-sealed pole and is connected with the movable-end electrically conductive connection block of the solid-sealed pole through the second fastening assembly.
5. The device for electrically connecting a wall bushing of a double-air-box structure high-current switchgear of claim 4, wherein the second electrically conductive connection unit further comprises a second spring contact finger, and the second spring contact finger is sleeved on the second electrically conductive connection block.
6. The heavy-current switchgear wall bushing conductive connection device of claim 1, wherein the outer conductive connection unit comprises a plurality of outer conductive connection blocks and a third fastening assembly, wherein the plurality of outer conductive connection blocks are disposed along the peripheries of the first conductive connection unit and the second conductive connection unit and are connected with the first conductive connection block and the second conductive connection block through the third fastening assembly.
7. The conductive connecting device for the wall bushing of the double-air-box structured high-current switch cabinet according to claim 6, wherein a plurality of slots for heat dissipation are formed in the outer conductive connecting block.
8. The installation method of the double-gas-box structure heavy-current switch cabinet wall bushing conductive connecting device is characterized in that the installation method is based on the double-gas-box structure heavy-current switch cabinet wall bushing conductive connecting device in any one of the claims 1-7, the installation method of the double-gas-tank structure heavy-current switch cabinet wall bushing conductive connection device comprises the following steps: Firstly, mounting a first conductive connecting block on a wall bushing and fixedly screwing the first conductive connecting block by using a fastener, then integrally mounting the first conductive connecting block in a gas box to be welded, and connecting the first conductive connecting block with a partition plate in the gas box and a mounting plate of the wall bushing of the mounting plate by using the fastener, wherein the fastener does not need to be screwed and a certain position adjustment space is reserved; Step 2, a second conductive connecting block is installed on the circuit breaker and is connected with a movable end conductive piece on a fixed sealing pole in the circuit breaker, and the circuit breaker is fixed and screwed by a fastener after being positioned by a positioning tool; Step 3, arranging a middle core conductive connecting sleeve on the first conductive connecting block, respectively assembling spring contact fingers on the first conductive connecting block and the second conductive connecting block, sleeving the middle core conductive connecting sleeve on the first conductive connecting block under the pressure of the spring contact fingers, and adsorbing the middle core conductive connecting sleeve at the bottom of the upper end; Step 4, installing the circuit breaker on a welding gas tank, fixing the circuit breaker by using a fastener, sliding down a central core conductive connecting sleeve adsorbed on a first conductive connecting block, and fine adjusting the position of a wall bushing at the same time, so that the central core conductive sleeve is connected with the first conductive connecting block and the second conductive connecting block, fixing the fastener of the wall bushing, and limiting the position of the central core conductive connecting sleeve by using a locking screw so that the central core conductive connecting sleeve can not slide up and down; And 5, finally installing an outer conductive connection unit of the conductive connection device, and embracing and connecting the first conductive connection block and the second conductive connection block by using two outer conductive connection blocks, wherein the outer sides are fixed by using fasteners, and the installation of the conductive connection device is completed sequentially phase by phase.

Description

Double-gas-tank structure high-current switch cabinet conductive connection device and installation method Technical Field The invention relates to the technical field of mechanical manufacturing, in particular to a conductive connecting device for a wall bushing of a heavy-current switch cabinet with a double-gas-box structure and an installation method thereof. Background The LSC2 type high-voltage switch cabinet is a high-voltage switch cabinet with an operation continuity function, and when any one of the functional units is opened to reach the compartment (except the bus compartment), all other functional units can still continue to be electrified and normally operate. The LSC2 type high-voltage switch cabinet has the characteristics of running continuity, safety, power supply reliability improvement and the like, and the safety and the reliability of a power supply system are improved while the continuous power supply of a power grid is ensured. The gas-insulated switchgear is a metal-enclosed switchgear and a control device, at least a part of which adopts gas higher than atmospheric pressure as an insulating medium, and the inside of the gas-insulated switchgear mainly comprises a circuit breaker, a disconnecting switch, a grounding switch, a bus and the like. For an inflatable switch cabinet of LSC2 type, an upper air chamber and a lower air chamber are generally adopted, wherein the upper air chamber comprises a main bus sleeve, a main bus, a branch bus, a three-station isolating switch and the like, and the lower air chamber comprises a breaker solid sealing pole, a connecting row, a wire inlet sleeve, a wire outlet sleeve and the like, and a wall bushing for connecting the upper air chamber and the lower air chamber. Because of the small size and compact structure of the gas-insulated switchgear, only a limited space can be reserved in the gas tank for installing the conductive connecting piece, especially for a high-current gas-insulated switchgear, not only the firmness of lap joint of the conductive piece is considered, but also the sufficient current carrying capacity of the equipment is met, and the switchgear with the double-gas-tank structure is formed by assembling and welding two gas tanks, which is equivalent to dividing the original whole gas tank into two parts, so that the installation and connection of the conductive connecting piece in a single crowded space of the gas-insulated switchgear can be more difficult. The conductive connecting piece in the wall bushing is used as an important component in the switch equipment, and the large-current switch needs a larger copper section due to larger current carrying capacity, so that the fixed points are more, and the installation in the air box with a small space is very inconvenient. If the conductive connecting piece of the wall bushing cannot be reliably connected, the loop resistance is locally overlarge, current carrying is not smooth, a local high-temperature heating source is caused during operation, the switching equipment can be quickly aged after long-time operation, the equipment burnout condition finally occurs, a certain potential safety hazard is brought to a power system, and therefore, it is very important to ensure the connection reliability of the conductive elements of the equipment. Therefore, there is an urgent need to provide a connection method of a high-reliability conductive device, which is a problem to be solved in the art. Disclosure of Invention Aiming at the technical problem that the reliability of the connection method of the conductive device in the existing gas insulated switchgear is not high, the invention aims to provide the conductive connection device of the wall bushing of the heavy-current switchgear with the double-gas box structure, which can enable the conductive connection piece to be connected quickly, conveniently and reliably, thereby ensuring the safe reliability of the operation of the equipment. In order to achieve the above purpose, the invention provides a double-gas-tank structure heavy-current switch cabinet wall bushing conductive connecting device, which comprises a first conductive connecting unit, a second conductive connecting unit and an outer conductive connecting unit, wherein the first conductive connecting unit is arranged on a gas tank, the second conductive connecting unit is arranged on a circuit breaker, the first conductive connecting unit is connected with the second conductive connecting unit and conducts, and the outer conductive connecting unit is arranged on the peripheries of the first conductive connecting unit and the second conductive connecting unit and is connected and fastened with the first conductive connecting unit and the second conductive connecting unit. Further, the first conductive connection unit comprises a first conductive connection block and a first fastening component, one end of the first conductive connection block is mounted on the wall bu