Operating mechanism of valve for removing flue gas and preventing fire

Abstract

The present invention discloses one kind of actuating mechanism for fire preventing smoke exhausting valve. The actuating mechanism includes one main rotating shaft assembly, one moving shelf assembly, one electromagnet, one micro switch, one pendulum link assembly, one electric line assembly, one temperature receptor assembly, one flameproof enclosure and one flameproof enclosure cover, sealing structures and one moving hammer amplifying mechanism, which is set between the electromagnet and the pendulum link assembly to increase the torque of the main rotating shaft and has one end connectedto the moving iron core inside the electromagnet and the other end fitting the pendulum link assembly. The present invention can meet the requirement of preventing fire and exhausting smoke, and has also functions of suppressing explosion, preventing erosion, preventing moisture and preventing radiation.

Description

Technical field: [0001] The invention relates to a fire-proof and smoke-exhaust valve actuator installed in a fire-proof and smoke-exhaust valve body of a ventilation and air-conditioning system, in particular to a fire- and smoke-exhaust valve for a ventilation and air-conditioning system installed in an explosive gas environment and in a corrosive and humid environment Fire and smoke valve actuator in the valve body. Background technique: [0002] With the development of fire protection and in order to protect the safety of people's lives and properties, more and more industrial and civil buildings in explosive gas environments and corrosive and humid environments need to install fire protection systems in ventilation and air conditioning systems. Smoke valve, although the fire and smoke exhaust valve actuators of the prior art have been able to meet the fire protection and smoke exhaust requirements of ventilation systems such as industrial and civil buildings, but becaus...

AI Technical Summary

Problems solved by technology

[0002] With the development of fire protection and in order to protect the safety of people's lives and properties, more and more industrial and civil buildings in explosive gas environments and corrosive and humid environments need to install fire protection systems in ventilation and air conditioning systems. Smoke valve, although the fire and smoke exhaust valve actuators of the prior art have been able to meet the fire protection and smoke exhaust requirements of ventilation systems such as industrial and civil buildings, but because the existing fire and smoke exhaust valve actuators cannot be used in materials and structures. It meets the sealing and explosion-proof requirements. When the fire and smoke exhaust valve actuator is energized, the switch installed inside the actuator is likely to cause sparks, so it is very easy to detonate in explosive gas, thus bringing certain dangers to people's lives and properties.

In view of the defects and deficiencies of the actuator, someone once installed a casing that has passed the explosion-proof inspection outside the existing actuator, but the problem caused by this practice is that after the casing is installed on the outer cover of the actuator, All the functions of the actuator in the shell will not be available, and the shell needs to be removed when it is used, and the shell should be covered after use, and the sealing performance of the combination of the two cannot meet the requirements of the explosion-proof level and protection level.

Another effect caused by the poor sealing of the existing actuators is that when the existing actuators are used in environments such as corrosive gases, humid gases, and radiant gases, it is easy to corrode and damp the internal parts of the mechanism. And affected by radiation, which will eventually affect the normal work of the actuator

[0003] In addition, the temperature sensor of the existing actuators is generally installed inside the mechanism. The problem brought about by it is that after the temperature sensor is installed or activated, the housing cover and shell of the actuator must be unpacked many times to facilitate the installation of the temperature sensor. Or exchange, this will cause some damage to the internal grease cleanliness and the sealing performance of the structure, and also increase the mechanism shell, which will increase the manufacturing cost

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