Corrosion-preventing and leakage-proof device for direct-current converter valve cooling water channel

Abstract

The invention relates to a corrosion-preventing and leakage-proof device for a direct-current converter valve cooling water channel. The corrosion-preventing and leakage-proof device comprises a ferrule connector and a ferrule nut, wherein the ferrule connector and the ferrule nut are arranged coaxially. One end of the ferrule nut is provided with a flexible tube coaxial with the ferrule connector, and arc protrusions are arranged on the inner wall of the portion, making contact with one end of the flexible tube, of the ferrule connector. According to the technical scheme, by adoption of the design of corrosion prevention and leakage prevention for the stainless steel cooling water channel, the purpose of corrosion prevention is achieved through equipotential holding within working time of a converter valve; and the FEP flexible tube is pushed into the tail of the ferrule connector, the ferrule nut is screwed gradually, along with deep-going of the ferrule nut, the FEP flexible tube is gradually pressed through diameter changing and the arc protrusions, proper locking moment of force is achieved, the sealing effect is generated, and thus fluid prevention is avoided.

Description

technical field [0001] The invention relates to a protection and anti-leakage device for a direct current converter valve, in particular to a corrosion protection and anti-leakage device for a cooling water channel of a direct current converter valve. Background technique [0002] As the key equipment of the converter station, the HVDC converter valve is the core functional unit to realize AC-DC conversion. Converter valve cooling components and cooling pipelines are important components of converter valves, such as thyristor radiators, damping resistors and branch water distribution pipes. The cooling medium with a certain flow rate passes through the pressure increase of the converter valve cooling system, enters the cooling element through the converter valve cooling pipeline to take away the heat generated by the converter valve, and then enters the outdoor heat exchange equipment, and then passes the heat through the outdoor heat exchange equipment. Discharged into the...

AI Technical Summary

Problems solved by technology

However, even at such low current densities, electrolytic corrosion of aluminum heat sinks can still occur if protective measures are not taken

[0003] In order to solve this problem, other types of converter valves currently adopt the following measures: (1) A certain type of converter valve uses needle-shaped platinum electrodes. This method of installing electrodes requires drilling holes on the surface of water pipes or components, which increases leakage points. Moreover, the cost is high, and the water-cooling pipes will be blocked by foreign objects due to fouling on the electrode surface, causing damping resistors, reactors and other components to affect their normal work due to poor heat dissipation. In severe cases, they can be damaged, causing the DC system to be forced to shut down Serious situation; (2) A certain type of converter valve uses stainless steel tubular electrodes, which need to be pressed into the interior of the radiator water channel by press-fitting during installation. The process is complicated and difficult to disassemble. The radiator electrode disclosed in utility model patent No. ZL201420566218.9 of tooling; (3) The existing converter valve is not equipped with anti-corrosion electrodes because the design of its pipeline and components has been finalized and put into operation for many years, resulting in the appearance of the radiator. Corrosion phenomenon, it is expected to install tubular electrodes in the inner water channel of the radiator without destroying the original structure, but due to the small diameter of the radiator, it is difficult to install electrodes

Images