Locking mechanism of tank positive-pressure cleaning equipment

Abstract

The invention relates to a locking mechanism of tank positive-pressure cleaning equipment. The mechanism comprises a pressure cover in matched and sealed connection with a tank opening of a tank. A steam inlet pipe and a drainage pipe communicated with the internal part of the tank are installed on the pressure cover. An air valve locking mechanism is also arranged on the steam inlet pipe or the drainage pipe. The inner side of the air valve locking mechanism is communicated with the steam inlet pipe. The outer side of the air valve locking mechanism is in matched and closed connection with the tank wall of the tank. After the internal part of the tank is cleaned by positive-pressure steam through the steam inlet pipe, generated waste liquid or waste gas is discharged out of the tank through the drainage pipe; therefore, the pressure in the tank accords with the safety requirement conditions of the equipment; the steam in the tank is sufficiently utilized to the greatest extent; the use rate of the steam heat energy is increased; the atmospheric pollution is reduced; and a certain materials (oil products, chemical products and the like) can be recycled.

Description

technical field [0001] The invention relates to an airtight car washing device for a freight tanker, in particular to a locking mechanism of a positive pressure cleaning device for a tank. Background technique [0002] In rail freight or road freight, tank cars used for transport often require tank cleaning operations. At present, the cleaning tank has been using the open steam washing technology. Although this technology is widely used, because it adopts the open steam washing method and the tank mouth is open, so in the process of car washing, most of the steam will flow out of the tank mouth immediately after a certain small cycle in the tank. Volatile, resulting in low steam utilization. This not only wastes a lot of cleaning steam, but also it is difficult to steam clean some positions in the tank. [0003] In summary, the existing open tank cleaning device and technology mainly have the following technical defects: [0004] 1) The steam utilization rate is low, the...

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Problems solved by technology

[0004] 1) The steam utilization rate is low, the waste of steam is large, and the cost of car washing is high;

[0005] 2) The temperature in the tank generally can only reach about 80-90°C, which makes it difficult to cook some parts in the tank;

[0006] 3) The cooking time is long, the efficiency of car washing is low, and the work intensity of workers is relatively high;

[0007] 4) The residual items (oil, chemicals, etc.) in the tank volatilize with the steam from the tank mouth to the atmosphere, causing serious air pollution, poor working environment on site, and affecting the safety of operators;

[0008] 5) When washing the tank, the steam noise is loud

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