Concentrated intake closing device

Abstract

The invention relates to a concentrated intake closing device. A driving mechanism at one side of a stand comprises an oscillating cylinder, a piston with a rack is engaged with a transmission gear , the transmission gear is installed on a machine body through a transmission shaft, an inner oscillating arm of a connecting rod mechanism is connected with the transmission shaft, and two ends of a connecting rod are articulated with an outer oscillating arm and the inner oscillating arm; a signal gear of an auxiliary drive mechanism is installed on the transmission shaft and engaged with a manual gear installed on a manual shaft, a travel switch of a control mechanism is installed on the machine body, one end of a deflector rod is connected with the travel switch and the other end is located between two collision blocks; a main shaft of an actuating mechanism at the other side of the stand passes through the stand and is respectively connected with the outer oscillating arm and a driving bevel gear, a driven bevel gear connected on a valve rotating shaft is engaged with the driving bevel gear, two ends of a cover arm are respectively connected with the valve rotating shaft and a valve cover, the valve rotating shaft is installed on the stand, and the valve cover is hermetically arranged on an annular valve port of the stand. The invention has the characteristics of compact structure, reliable sealing, quickly closing of air ports and self-locking of the valve cover.

Description

technical field [0001] The invention relates to a centralized air intake closing device, which belongs to the technical field of pneumatic door cover closing. Background technique [0002] In some specific spaces, such as ultra-clean pharmaceutical workshops, sterile operating rooms, and ship cabins, ventilators are usually installed on the walls of the chambers to regularly replace the indoor air. When there are harmful polluting gases outdoors, it is necessary to Quickly close the vent. In order to quickly close the vent, the pneumatic valve belt is usually used to control the opening and closing of the door cover, but the nominal diameter of the vent opened and closed by the valve cover controlled by the pneumatic valve is mostly below 200mm. But for some larger spaces, the size of the air vent is also required to be larger. If a dedicated large pneumatic valve is used, it will not only be bulky, heavy, and take up a lot of space, but will also cause inconvenience in ins...

AI Technical Summary

Problems solved by technology

However, for some larger spaces, the size of the vent port is also required to be larger. If a dedicated large pneumatic valve is used, it will not only be large in size, heavy in weight, and occupy a large space, but will also cause inconvenience in installation.

Furthermore, due to the long working stroke of the piston of the large pneumatic valve, the closing time of the door cover is mostly about 10s, which cannot meet the requirements of fast closing, so the use of this type of pneumatic valve is limited.

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