Pulsed concentrated air inflow closing device

Abstract

The invention relates to a pulsed concentrated air inflow closing device. An end plate is provided with at least two independent valve ports, at least two valve plate shafts hinged to the end plate are connected to corresponding valve plates through respective cover arms, and the valve plates correspond to the respective valve ports; the end plate is provided with lower locking parts at the far ends of the valve plate shafts, and upper locking parts are buckled with the lower locking parts in the closing process; a connecting rod of a connecting rod mechanism of a driving mechanism is hinged to at least two crank arms, the crank arms are connected to the corresponding valve plate shafts, and a piston shaft of a driving cylinder is connected to the connecting rod; and a piston shaft of a locking cylinder of an opening and locking mechanism is connected to the rear part of a pawl, the middle of the pawl is hinged to a support, a ratchet wheel with a clamping groove is installed on one valve plate shaft, and a spring is installed on the support and the pawl. The pulsed concentrated air inflow closing device has the advantages that the structure is compact, the manufacturing cost is low, sealing is reliable and the impact vibration resistance is good. Through the matching structures of the multiple valve plates and the valve ports, the large-size valve plates in ventilation openings can be fast opened or closed without adding driving moment.

Description

technical field [0001] The invention relates to a closing device for pulse concentrated air intake, which belongs to the technical field of pneumatic closing. Background technique [0002] The centralized air intake closing device is usually used in such as ultra-clean pharmaceutical workshops, sterile operating rooms, laboratories, and marine cabins. Ventilation ports are usually installed on the walls of the chambers, and the valve plate on the centralized air intake closing device is opened at the vents. , Change the indoor air regularly or temporarily. When there are harmful polluting gases outdoors, you need to quickly close the door panel and cut off the vent. In order to quickly close the vent, the pneumatic valve belt is usually used to control the opening and closing of the valve plate, but the nominal diameter of the vent opened and closed by the valve plate controlled by the pneumatic valve is mostly below 200mm. For the centralized air intake closing device inst...

AI Technical Summary

Problems solved by technology

For the centralized air intake closing device installed at a large vent hole, the size of the valve plate is also required to be relatively large. 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 and cannot Meet the requirements of fast closing, so limit the use of this type of pneumatic valve

Secondly, the existing centralized air intake closing devices all use a valve plate. For a valve plate with a large diameter, it is necessary to increase the size of the valve plate. The size of a large-sized valve plate is affected by manufacturing and installation factors, and its own deformation is relatively large. In addition, the valve plate and the cover arm are connected by fasteners. Since the valve plate cannot be adjusted automatically, the sealing ring will be damaged, so it is difficult to maintain a good sealing performance for a long time. Its sealing performance is further reduced

If the thickness of the valve plate is increased to improve its rigidity and improve its impact resistance, a greater driving force is required to realize its opening and closing, but it cannot meet the requirements of rapid opening and closing.

If the valve plate is made of high-strength light material, the manufacturing cost will be greatly increased

Furthermore, under the action of external impact, vibration, and external wind pressure, or under the action of indoor wind pressure, the centralized air intake closing device will make the opening and closing of the valve plate unstable, resulting in the slight opening of the valve plate when closing, resulting in Air leakage, allowing outside air to enter the room, or suddenly closing the open valve, affecting the normal operation of personnel and equipment

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