Power supply and distribution method for long-distance small-diameter tunnel secondary lining construction

Abstract

The invention discloses a power supply and distribution method for long-distance small-diameter tunnel secondary lining construction. A power supply and distribution system comprises a commercial power transformer, a main cable, a rail-mounted automatic voltage boosting and stabilizing device, a low-voltage power distribution trolley and secondary lining construction electric equipment, and the whole power supply and distribution process consists of two stages, wherein the first stage is a normal power supply range of the commercial power transformer, and electric energy passes through a primary distribution box outside a tunnel to the low-voltage distribution trolley through the main cable, and then passes through a secondary distribution box and a tertiary distribution box on the low-voltage distribution trolley to reach the secondary lining construction electric equipment; and in the second stage, the normal power supply range of the commercial power transformer is exceeded, the electric energy passes through the primary distribution box outside the tunnel through the main cable to reach the rail-mounted automatic voltage boosting and stabilizing device, and then reaches the secondary distribution box and the tertiary distribution box on the low-voltage distribution trolley to reach the secondary lining construction electric equipment. Under the condition that the long-distance power supply voltage changes, it can be guaranteed that the equipment end voltage is normal, and the problems of long-distance power supply voltage drop and small tunnel space limitation are effectively solved.

Description

technical field [0001] The invention relates to the technical field of power supply for tunnel construction, in particular to a power supply and distribution method for secondary lining construction of long-distance and small-diameter tunnels. Background technique [0002] Long-distance and small-diameter tunnel secondary lining construction requires a large number of mechanical equipment, high power of a single equipment, large voltage drop of power supply lines, serious line loss, and it is easy to cause equipment to fail to start normally, service life is shortened, and the economic effect of power supply is low. In view of this situation, the use of conventional industrial voltage power supply cannot meet the long-distance power supply requirements. At the same time, it is limited to small-diameter tunnels, and multi-level voltage regulation equipment is used. The required number of distribution boxes is large, which will seriously affect the passage of equipment in the t...

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Problems solved by technology

[0003] In order to overcome the technical defect that conventional industrial voltage power supply in the prior art cannot meet the power supply requirements for the construction of the second lining of long-distance small-diameter tunnels, the present invention provides a power supply and distribution method for the construction of the second lining of long-distance small-diameter tunnels, which solves the problem of above technical problems

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