Vacuum release valve for tank truck loading and unloading

Abstract

A vacuum relief valve for loading and unloading of an oil tank truck comprises a valve body, wherein a cover body is arranged at the top of the valve body; an air supply port is formed in the center of the cover body; a valve clack and a guide frame are arranged in the valve body; an upward connecting rod is arranged in the center of the top of the valve clack; a support is arranged on one side of the air supply port in the cover body; a balance knife edge is arranged at the top of the support; a balance arm is mounted at the balance knife edge; a notch matched with the balance knife edge is formed in the balance arm; a balancer is mounted at one end of the balance arm; and the other end of the balance arm is articulated with the connecting rod via a connecting sheet.The valve clack arranged in the valve body and used for sealing the air supply port is articulated with the balance arm via the connecting rod; air can be supplied into the oil tank truck automatically by the matching of the balancer when the oil tank truck generates a powerful suction force during the oil unloading; deformation of the oil tank truck and damages of the valve body are avoided; the maintenance expense is reduced; the whole sealability of equipment is further ensured; and toxic gas is prevented from being discharged to the atmosphere to result in environment pollution.

Description

technical field [0001] The invention relates to a loading and unloading device for an oil tank truck, in particular to a vacuum release valve for loading and unloading an oil tank truck. Background technique [0002] At present, the existing valves installed at the mouth of the tanker are all check valves. When the tanker unloads oil, the tanker needs to bear a large suction force to open the check valve to replenish the tanker. Insensitive, it is easy to cause deformation of the tanker, damage to the valve body of the tanker, and increase maintenance costs. At the same time, toxic gases will be directly discharged into the atmosphere, which is likely to cause pollution to the surrounding environment. Contents of the invention [0003] The technical problem to be solved by the present invention is to propose a vacuum release valve for loading and unloading oil tankers that is sensitive in response, prevents deformation and damage of oil tankers, and avoids environmental po...

AI Technical Summary

Problems solved by technology

[0002] At present, the existing valves installed at the mouth of the tanker are all check valves. When the tanker unloads oil, the tanker needs to bear a large suction force to open the check valve to replenish the tanker. Insensitive, it is easy to cause deformation of the tank car, damage the valve body of the tank car, and increase maintenance costs. At the same time, toxic gases will be directly discharged into the atmosphere, which is likely to cause pollution to the surrounding environment

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