Cable connection structure of power supply system of buried sewage treatment equipment

Abstract

The invention discloses a cable connection structure of a power supply system of buried sewage treatment equipment. The power supply system comprises a power supply device arranged outside a machine room body and a loading device arranged inside the machine room body, a driving module is arranged between the power supply device and the loading device, a first lightning protection circuit is arranged between the input terminal of the driving module and the earth terminal of the driving module, a second lightning protection circuit is arranged between the output terminal of the driving module and the earth terminal of the driving module, and the driving module comprises a rectifying circuit, a filter circuit and an inverter circuit; the cable connection structure is configured in a mode that the power supply device and the driving module as well as the driving module and the loading device are both connected through a shielded cable, a cable shielding layer of one end of the shielded cable, which is adjacent to one end of the power supply device, is earthed through an earthing element, and the cable shielding layer of the other end of the shielded cable, which is adjacent to the loading device, is earthed directly. The cable connection structure of the power supply system of the buried sewage treatment equipment can improve the performance of the power supply system in at least one aspect of safety, anti-interference or controllability.

Description

technical field [0001] The invention relates to a sewage treatment technology, in particular to a power supply system and ancillary facilities of a fan room of an underground sewage treatment equipment. Background technique [0002] The buried sewage treatment equipment is a kind of sewage biological treatment system with biofilm as the main body of purification. It has the characteristics of low consumption, stable operation and convenient maintenance, so it has a wide application prospect and promotion value. [0003] Typical buried sewage treatment equipment includes grid wells, regulating tanks, primary sedimentation tanks, dynamic oxidation contact tanks, clarifiers and fan rooms connected to the dynamic oxidation contact tanks; the dynamic oxidation contact tanks include reactors The main body, the inner shell of the reactor, and the rotary-cut agitator; the inner shell of the reactor is arranged inside the main body of the reactor, and its bottom opening communicates...

AI Technical Summary

Problems solved by technology

[0005] There are deficiencies in the design of the above-mentioned fan room power supply system: First, the lightning protection measures are not good enough. When the lightning current is too strong, a small part of the lightning current may enter the load equipment, which will cause the load equipment to be damaged under the impact of the lightning current residual voltage. , which makes the system less secure and greatly shortens its service life; second, the anti-interference measures are not ideal, and the load equipment is easily disturbed by factors such as power supply and external environment, which has a great impact on the stable operation of the load equipment; The reason is that the control is not convenient enough, and the adjustment of its control parameters is not flexible enough to meet the needs of users well.

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