A hatch assembly for positive and negative pressure devices

Abstract

The invention discloses a hatch assembly for a positive and negative pressure device, comprising a hatch and a guide mechanism; the guide mechanism includes a fixed guide assembly, a first moving guide assembly and a second moving guide assembly; the fixed guide assembly An anti-extrusion part is arranged on the top; when the hatch is in a closed state, the second moving guide assembly is located directly in front of the anti-extrusion part; when the pressure chamber is in a positive or negative pressure state, The second moving guide assembly can be accommodated in the anti-extrusion portion. The guide mechanism provided in the present application can avoid squeezing the hatch door due to negative pressure or positive pressure when the hatch door is closed and the pressure cabin forms negative pressure or positive pressure, thereby ensuring that the hatch door Continue to work normally. And it is ensured that during the movement of the whole cabin door, the movement of the guide device will not generate impact load, thus ensuring the service life of the guide device.

Description

technical field [0001] The invention relates to a door body structure of a pressure vessel, in particular to a hatch assembly for a positive and negative pressure device, in particular to a hatch assembly for a pulsating vacuum pressure steam sterilizer. Background technique [0002] Both positive pressure and negative pressure devices belong to pressure vessels. When there is positive pressure in the cabin, it is a positive pressure device; when there is negative pressure in the cabin, it is a negative pressure device. When the pressure vessel device is in use, the container needs to be sealed, and a positive or negative pressure environment (higher or lower than the standard atmospheric pressure) is formed inside the container. For example, when the pulsating vacuum pressure steam sterilizer is used, it is necessary to The cabin can only be sterilized if it forms a negative pressure sealed environment. For the door of the pulsating vacuum pressure steam sterilizer, in ord...

AI Technical Summary

Problems solved by technology

[0003] However, after the hatch door is closed, when a negative pressure environment is formed on the cabin body, a negative pressure will be formed on the hatch door towards the cabin body, and the hatch door has a tendency to move towards the cabin body, so that the hatch door will Elastic deformation, the elastic deformation is transmitted along the hatch to the guide device. Since the guide device only has a guiding function, it is not strong enough to resist the deformation caused by negative pressure compared with the thick hatch, and it is very easy to be squeezed and bent at this time Deformation, and then can not normally complete the guidance of the door, or even stuck so that the door can not move normally

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