Tank safety valve explosion-proof opening device and method for exhausting gas in the tank

Abstract

The invention discloses a safety valve anti-explosion opening device of a tank and a method for exhausting gas in the tank. An anti-explosion sleeve, a main sleeve and a supporting sleeve are connected in sequence in a sealing manner. A motor is sleeved with the anti-explosion sleeve. The motor and a coupling sleeve are coaxially installed. The coupling sleeve is provided with a lead screw nut. The inner end of a lead screw is sleeved with the lead screw nut, so that a lead screw pair is formed. A stepped shaft with threads is arranged at the outer end of the lead screw and extends into the supporting sleeve. The lead screw and the supporting sleeve are coaxially installed. The outer end of the lead screw is sleeved with a connecting sleeve through threads. The top of a safety valve is sleeved with the connecting sleeve through threads. A gas output connector is formed in the side of the main sleeve and is externally connected with the middle end of a tee coupling. Water is injected into the tank, and gas is exhausted through an overflowing guide tube. When water reaches the overflowing guide tube, the overflowing guide tube is closed, and the device is started. Water is continuously injected, and residual gas is exhausted from the gas output connector of the main sleeve. According to the safety valve anti-explosion opening device of the tank and the method for exhausting gas in the tank, the problem that gas is not completely exhausted out of a tank is solved, gas is recovered in the exhaust process, and recovered gas can be usable and does not pollute the air.

Description

technical field [0001] The invention relates to a valve opening device and a gas treatment method therein, in particular to an explosion-proof opening device for a tank safety valve and a method for exhausting gas in the tank. Background technique [0002] Tanks on tank trucks carrying chemical liquids and gases are pressure vessels. According to the "Pressure Vessel Safety Technical Supervision Regulations" issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, the "Liquefied Gas Vehicle Tank Car Safety Supervision Regulations" and GB150 "Steel Pressure Vessels", the special transport vehicles designed and manufactured with lightweight are used for Special vehicles for transporting liquefied gases such as propane, propylene, dimethyl ether, liquid ammonia, methylamine, and acetaldehyde. Tank trucks belong to the special equipment industry. The State Administration of Quality Supervision strictly stipulates ...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing detection methods require inspectors to enter the tank on the tank truck for inspection every time. Due to the transportation of special liquefied gas, if the gas is not completely exhausted, it will cause certain harm to the human body.

The general exhaust method is to inject water into the tank, and the gas is discharged from the overflow pipe of the tank, and the overflow pipe of the tank is a U-shaped curved structure at the top of the tank, and the overflow pipe is separated from the tank at the mouth of the tank. The top is 30cm, so the gas cannot be completely exhausted through the overflow pipe. After the exhaust is completed, the inspectors cannot directly enter the inspection, which will cause trouble for the inspection of the tank car. Usually, the chemical gas in the tank must be diluted by repeated blowing with air. When it is safe, personnel can enter the tank

This affects the detection progress, and the unexhausted chemical gas is purged into the atmosphere, causing pollution and waste

Images