Storage tank pressure balancer

Abstract

The invention discloses a storage tank pressure balancer, and particularly relates to the field of chemical equipment accessories. The storage tank pressure balancer comprises a valve body, wherein a first cavity and a second cavity are arranged in the valve body, the top of the valve body is detachably and movably connected with a valve cover, a negative pressure valve disc is movably connected between the valve cover and the first cavity, a positive pressure valve disc is movably connected between the negative pressure valve disc and the second cavity, a fire retardant plate is detachably and movably connected to one side of the valve body, a rainproof cap is arranged on one side of the fire retardant plate, and the rainproof cap, the fire retardant plate and the valve body are fixedly connected through bolts and nuts. The invention solves the problems that only an opening or one-way breathing mode is adopted in the prior art, is mainly applied to volatile liquid or storage tanks with large temperature difference change or certain requirements on sealing performance, has great benefits, and achieves the purposes of autonomous pressure regulation, is convenient to repair and maintain, and is safe and reliable; and the sealing performance is relatively poor as most storage tanks in the prior art are in opening or one-way breathing modes or rupture disks are mounted. The pressure regulation of the storage tank pressure balancer is relatively good.

Description

Technical field [0001] The present invention relates to chemical equipment parts technical field, and more particularly, the present invention relates to a tank pressure balancer. Background technique [0002] Storage tanks are widely petrochemical production equipment used for storing a variety of raw oil, process oil, refined oil, gas and other products and aromatics in the oil refining industry. Atmospheric tanks typically have to take over the communication with the atmosphere directly, always maintain the operating pressure in the tank does not exceed the design pressure. Mechanical properties, chemical composition, weldability atmospheric tank should be considered in the selection. Quality tank materials, specifications and marks shall comply with the corresponding national standards or industry standards. Tank materials used, including sheets, tubes, forging, welding materials, profiles and the like, should have the quality of the original certificate of material units pro...

AI Technical Summary

Problems solved by technology

For some volatile media, when the temperature of the storage tank rises or falls, the pressure in the storage tank will change greatly. In light cases, the pressure will increase and the medium will leak. In severe cases, the storage tank will open welding, collapse, etc.

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