Low-pressure control drain system

Abstract

The invention belongs to a drain system, and particularly relates to a low-pressure control drain system. The low-pressure control drain system is characterized by comprising a valve body funnel, a dustproof stream guidance cover, a gravity block seal ball, a rubber sealing ring, a tapered thin cylinder and a steam release outlet, wherein the lower end of the valve body funnel is funnel-shaped, and the upper end is cylindrical; the cylindrical upper end and the dustproof stream guidance cover are fixed together by welding; a lower end opening of the valve body funnel extends downwards along the thin cylinder; the thin cylinder and a horn mouth of the valve body funnel are fixed together through fillet full-length welding; the rubber sealing ring is arranged in the horn mouth of the vale body funnel; the gravity block seal ball is arranged on the rubber sealing ring; the upside of the side surface of the dustproof stream guidance cover is provided with the steam release outlet; the dustproof stream guidance cover is formed by sleeving inner and outer mounting catching grooves made of two seamless steel pipes of the same specification by processing of a turning lathe; and the insideand the outside of a low-pressure control drain valve are provided with an anticorrosive paint with the thickness of 100 mum. The low-pressure control drain system solves the problems of poor sand-proofing and dust-proofing effect of a water replenishing funnel.

Description

technical field [0001] The invention belongs to a relief system, in particular to a low pressure control relief system. Background technique [0002] For a long time, there are a large number of heating equipment used in oil and gas fields, but the most used and most commonly used is the atmospheric pressure heating furnace, because the atmospheric pressure furnace has the characteristics of simple production, convenient maintenance, safe operation, and low water quality requirements. However, it also has some problems in production, such as severe fouling of the furnace cavity when it is used for a long time in areas with poor water quality, relatively large water consumption in plateau areas, and inconvenient water replenishment. The reason is that the normal-pressure ventilation hole of the furnace body is "straight row type". When the water temperature of the furnace body is in the high temperature range (80~95°C), especially when the external wind speed is high, the wat...

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Problems solved by technology

However, it also shows some problems in production, such as severe fouling of the furnace cavity when it is used for a long time in areas with poor water quality, relatively large water consumption in plateau areas, and inconvenient water replenishment, etc.

The reason is that the normal-pressure ventilation hole of the furnace body is "straight row type". When the water temperature of the furnace body is in the high temperature range (80~95°C), especially when the external wind speed is high, the water loss will be large.

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