BFQ type coal feeder sealing gate valve

Abstract

The invention relates to a BFQ type coal feeder sealing gate valve, which comprises a valve on-off cylinder, a valve plate, a valve body, a towboat, valve locking cylinders, eccentric shafts and eccentric arms, wherein the towboat is arranged below the valve plate; a bearing is arranged in the towboat; a piston rod of the valve on-off cylinder is detachably connected to the lower part of the valve plate; a spherical circular ring is arranged on the valve plate and matched with a conical surface sealing ring at the upper part of the valve body; the valve locking cylinders are arranged on two sides of the valve plate and connected with push rods; the eccentric shafts are fixed on the push rods and are arranged at the lower part of the valve plate; and the eccentric arms are arranged on the eccentric shafts. The BFQ type coal feeder sealing gate valve is simple in structure and convenient to maintain and mount, the sealing performance of the valve plate is good, the material leakage and the material spilling are prevented, and meanwhile, the valve body space is big end down, so that the material accumulation is prevented.

Description

technical field [0001] The invention relates to a lower ram door of a coal feeder in a power plant, in particular to a BFQ type coal feeder sealing ram valve. Background technique [0002] At present, the lower gate of the coal feeder in domestic power plants is mainly driven by rack and pinion. This type of gate is installed on the upper part of the coal mill at the lower part of the coal feeder. The driving device is electric and has a small driving force. The mechanical transmission efficiency is poor. fragile. Moisture and other corrosive substances in the raw coal cause corrosion and damage to the gear shaft, which forces the door panel to fail to close. Coal powder accumulates on the door panel chute and jams, making the door panel unable to close in place. There is coal leakage, and the coal mill sprays upward. There are high-temperature powder materials, which bring great safety hazards to inspection and maintenance. Contents of the invention [0003] In order to...

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Problems solved by technology

[0002] At present, the lower gate of the coal feeder in domestic power plants is mainly driven by rack and pinion. This type of gate is installed on the upper part of the coal mill at the lower part of the coal feeder. The driving device is electric and the driving force is small. The mechanical transmission efficiency is poor. fragile

Moisture and other corrosive substances in raw coal cause corrosion and damage to the gear shaft, which forces the door panel to fail to close. Coal powder accumulates on the door panel chute and jams, making the door panel unable to close in place. There is coal leakage, and the coal mill sprays upward. There are high-temperature powder materials, which bring great safety hazards to inspection and maintenance

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