Method for preventing manhole door of pressure vessel from being mistakenly opened under pressure

Abstract

The invention discloses a method for preventing a manhole door of a pressure vessel from being mistakenly opened under pressure. The equipment for realizing the method comprises the pressure vessel, an inlet valve lock, an outlet valve lock, a pressure relief valve lock, a manhole door mechanical lock, a controller, an electronic pressure controller, a manhole door electromagnetic lock and a key replacing device, wherein the inlet valve lock, the outlet valve lock and the pressure relief valve lock are arranged on the pressure vessel; the manhole door mechanical lock is arranged on a manhole door of the pressure vessel; the inlet valve lock, the outlet valve lock and the pressure relief valve lock are separately opened or closed by a first key, a second key and a third key; the manhole door mechanical lock is opened or closed by a fourth key; the controller is arranged in the pressure vessel; a pressure vessel pressure testing loop is arranged in the controller; the electronic pressurecontroller is electrically connected with the pressure vessel pressure testing loop; the manhole door electromagnetic lock is arranged on the pressure vessel manhole door; the manhole door electromagnetic lock is electrically connected with the electronic pressure controller; and the key replacing device can combine the first key, the second key and the third key to replace the fourth key. Through the adoption of the method disclosed by the invention, mistakenly opening the manhole door of the pressure vessel under pressure is avoided, and the generation of personal injury and injuring accidents is avoided.

Description

technical field [0001] The invention belongs to the technical field of hydropower station equipment, and in particular relates to a method for preventing a manhole door of a pressure vessel from being accidentally opened under pressure. Background technique [0002] In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art: [0003] As the carrier of gas and oil sources, pressure vessels are widely used in hydropower stations, and are equipped with pressure oil tanks and gas storage tanks with different pressures and sizes. Because of the high pressure of the medium contained in it, it is a major source of danger in daily work, and there have been personal injury accidents in China where the manhole door of the pressure vessel was opened by mistake. However, for the manhole door of the pressure vessel, there is no design and Equipped with an anti-mis-opening locking device. [0004] When the pressu...

AI Technical Summary

Problems solved by technology

When the pressure vessel is overhauled, it is only necessary to close the inlet and outlet valves, install ordinary padlocks, open the pressure relief valve to release the pressure, and then open the manhole door after the personnel judge that the pressure is 0. Misjudgment or omission of personnel can easily cause personal injury or death

Since the inlet and outlet valves are closed, only ordinary padlocks are installed, and there is no mandatory locking function. If personnel accidentally open the inlet and outlet valves during maintenance, personal injury accidents will also occur.

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