Gas charging and discharging fixing clamp for GIS combined electric appliance

Abstract

The invention provides a GIS combined electric appliance inflation and deflation fixing clamp which comprises a clamping plate A, a clamping plate B, two sets of guide rods, a pushing rod, a handle, a stress application rod, a pushing piece and a releasing piece. The clamping plate A and the clamping plate B are each of a flat plate structure with a U-shaped open groove, and the two sets of guide rods perpendicular to the clamping plate A are fixedly arranged on the left side face of the clamping plate A; the left end of each group of guide rods is provided with a handle, the clamping plate B is arranged between the clamping plate A and the handle and is parallel to the clamping plate A, the two groups of guide rods penetrate through the clamping plate B, the guide rods are sleeved with springs A, and the springs A are located between the clamping plate A and the clamping plate B. According to the SF6 inflation and deflation fixture, the principle similar to a glue gun is utilized, rapid butt joint and fixation of the inflation head and the inflation inlet are achieved, the butt joint process is safe and reliable, inflation and deflation are labor-saving and rapid, the whole fixture is easy to operate and convenient to carry, and the SF6 inflation and deflation work efficiency can be greatly improved.

Description

technical field [0001] The invention relates to a power maintenance appliance, in particular to a maintenance appliance for a GIS combined electrical appliance, in particular to a fixing jig for charging and discharging gas of a GIS combined electrical appliance. Background technique [0002] Sulfur hexafluoride closed combined electrical appliances, known internationally as "Gas Insulated Switchgear" (Gas Insulated Switchgear) or GIS for short. It combines the primary equipment in a substation except the transformer, including circuit breakers, disconnectors, grounding switches, voltage transformers, current transformers, lightning arresters, busbars, cable terminals, inlet and outlet bushings, etc. As a whole; GIS combined electrical appliances use sulfur hexafluoride gas with excellent insulation performance as the insulation and arc extinguishing medium, so the volume of the substation can be greatly reduced, miniaturization is achieved, and it has the advantages of easy...

AI Technical Summary

Problems solved by technology

Taking the ZF12-126(L) combined electrical appliance as an example, due to the aging of the sealing rings of each component, it is easy to cause SF6 leakage in the equipment; the low pressure of SF6 will cause the circuit breaker to be locked, and it cannot be opened and closed normally in the event of equipment failure; another Even if the circuit breaker is not locked, when the SF6 pressure is low, the arc cannot be effectively extinguished when the combined electrical circuit breaker and isolating switch are opened and closed, and the equipment may explode in severe cases.

[0004] At this stage, when SF6 gas is supplied to GIS combined electrical appliances, due to the design of the gas charging port, it is necessary to align the charging head with the gas charging port, and then fix the gas charging head firmly on the gas charging port with three screws; Twist each of the three screws one turn, and apply force to the three screws in a circular manner (otherwise, if the inflatable head is tilted too much, it will destroy the seal of the inflatable port after entering the inflatable port), so that the inside of the inflatable head can be pushed in place, so that the air In the process of installing and removing the inflatable head, since the inflatable head and the inflatable port are sealed equipment, the tolerance is small, and the three screws are slightly unbalanced, which will easily cause the screw to be unable to be disassembled or even broken or slipped. Prolong the working time or affect the next gas supply

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