Vibration reduction products include butterfly valve electric butterfly valve, electric butterfly valve, fan electric butterfly valve, air conditioner electric butterfly valve, damping butterfly valve electric butterfly valve, etc., which are commonly used for foundation vibration reduction of equipment such as water pump, fan, water chiller, diesel engine, etc., as well as vibration reduction of various fan coils, fresh air units, air ducts, etc.
When it comes to the electric butterfly valve with damping butterfly valve, many people will blurt out its two advantages, namely, the low frequency of the electric butterfly valve with butterfly valve and the large damping of the electric butterfly valve. These two advantages directly avoid the inherent resonance amplitude of the steel butterfly valve. It can be said that these two advantages directly cover its other advantages. In fact, it has many other advantages.
The vibration isolation efficiency of electric butterfly valve with damping butterfly valve is more than 80%, and the design life can reach 30 years, almost maintenance free; The electric butterfly valve does not need to be fixed with bolts, but is fixed with a fixed base plate, which can facilitate the positioning and leveling of the electric butterfly valve; Damping is liquid damping, imported from Germany; Eliminate dynamic load without foundation; Improve the seismic function and quickly resume production; Protect equipment, reduce failure rate and extend service life; Shorten process flow, improve work efficiency and plant utilization; Damping butterfly valve electric butterfly valve can bear a large weight. It can be said that the electric butterfly valve has many advantages. This has greatly increased its demand. Many places where other electric butterfly valves are used are replaced by damping butterfly valves.
Damping butterfly valve, electric butterfly valve and electric butterfly valve have something in common, that is, they both have vibration isolation, noise reduction and protection against damage caused by vibration. These are the common characteristics of the two, so what are the differences between the two? The electric butterfly valve of damping butterfly valve is applicable to the working environment of - 20 ℃ - 80 ℃. Its natural frequency within the normal working load range is between 1.5HZ-4.9HZ, and the damping ratio is 0.065. It is an ideal damping product for air conditioners, thermostatic equipment, fans, cooling towers, refrigeration units, compressors, pumps and other airborne equipment.
The effect of electric butterfly valve in low temperature will become worse and worse. Sometimes the temperature is too low, resulting in freezing and fragmentation! The electric butterfly valve with damping butterfly valve has the double advantages of the low frequency of the electric butterfly valve of the butterfly valve and the large damping of the electric butterfly valve. Combining the advantages of the two, the phenomenon of amplitude surge when the electric butterfly valve of the butterfly valve resonates is eliminated, and the problem of high natural frequency of the electric butterfly valve is solved.
Different electric butterfly valves have different functions, but in general, the selection of specifications of electric butterfly valves for damping butterfly valves really depends on the pipeline, as will be discussed below. In fact, the electric butterfly valve of damping butterfly valve can be called the electric butterfly valve of pipeline in the pipeline. It is widely used in various pipelines and equipment in steel, power generation, petrochemical, cement and other industries. The selection of electric butterfly valve of butterfly valve is also strict, and its quality directly affects the operation progress.
Then how to select the electric butterfly valve? The surface treatment of shell and butterfly valve shall be conducted by baking paint treatment, galvanizing treatment, zinc aluminum treatment and other methods to avoid corrosion of vibration isolator in a short time, thus affecting the service life of electric butterfly valve. It is better not to use products with painted surface treatment; The longitude between the operating frequency of the equipment and the natural frequency of the electric butterfly valve of the butterfly valve should be greater than 3. How can the vibration isolation efficiency be guaranteed to be more than 85% in this case; The horizontal rigidity and vertical rigidity of butterfly valve shall be greater than or equal to 1. The ratio between the butterfly valve diameter and the butterfly valve height after rated negative pressure shall be greater than 0.7. To ensure the horizontal stability of the electric butterfly valve of the butterfly valve;
Proper electric butterfly valve shall be selected based on the principle of convenient installation. So let's go back and say that the selection of specifications of electric butterfly valves for damping butterfly valves depends on the amount of anti vibration force required to prevent pipeline vibration, The specification of the butterfly valve of the valve shall be selected according to the accurate value calculated and the initial force of the butterfly valve preloading shall be determined.
Otherwise, the specification of valve butterfly valve can be selected according to the nominal diameter of the pipeline. The electric butterfly valve of butterfly valve is to reduce or eliminate the periodic vibration or instantaneous impact caused by the irregular flow of medium, wind force, water hammer (or steam hammer), earthquake and other reasons of the pipeline through the valve, the rigidity of butterfly valve and the initial force of butterfly valve pre compression, which can improve the natural vibration frequency of the whole pipeline system. It shall be kept away from the pipeline vibration frequency caused by external interference, so as to avoid pipeline resonance and reduce the additional stress caused by pipeline vibration.