Structure and working principle of electric butterfly valve
The electric butterfly valve is a flexible body formed by vulcanizing the cord layer, inner and outer layers or steel wire ring after molding, and it is a component that uses the compressibility of air to complete the elastic function.
It is commonly known as electric butterfly valve, electric butterfly valve, etc. The electric butterfly valve assembly consists of the electric butterfly valve, the upper base, the lower base (piston), and the cushion, which are assembled to form a whole with a closed air chamber. The electric butterfly valve can be divided into three categories according to its shape: capsule type, membrane type and sleeve type. According to the sealing structure, it can be divided into four categories: pressure self sealing type, rim clamping type, hoop seal type and hybrid type. The load of the electric butterfly valve is mainly received by the cord. The number of layers of the cord is mainly composed of two layers. The special request product is composed of four layers of cord. The inner layer is mainly used for sealing, while the outer layer is used for maintenance in addition to sealing. When the electric butterfly valve works, the inner chamber is filled with compressed air to form a compressed air column. With the increase of vibration load, the height of the butterfly valve decreases, the volume of the inner chamber decreases, the rigidity of the butterfly valve increases, and the effective bearing area of the air column in the inner chamber increases. At this time, the bearing capacity of the butterfly valve can increase. When the vibration load decreases, the height of the butterfly valve increases, the volume of the inner chamber increases, the stiffness of the butterfly valve decreases, and the effective bearing area of the air column in the inner chamber decreases. At this time, the bearing capacity of the butterfly valve decreases. In this way, within the effective stroke of the electric butterfly valve, the height, inner cavity volume and bearing capacity of the electric butterfly valve can achieve smooth flexible transmission and efficient control of amplitude and vibration load with the increase and decrease of vibration load. It can also adjust the stiffness and bearing capacity of the butterfly valve by increasing or decreasing the air volume, and it can also be equipped with an auxiliary air chamber to complete automatic conditioning. AW=F ／ P, where: AW － effective area of electric butterfly valve, mm2, F － load of electric butterfly valve, kN, P － internal pressure of electric butterfly valve, MPa