Today, Dongfeng's Xiaobian takes you to learn about electric butterfly valves.
The two ends of the electric butterfly valve capsule need to be connected with two plates to form a compressed air chamber. The cable itself does not provide the bearing capacity, but the compressed air is filled with capsules. Generally speaking, the number of crimp capsules is usually 1-3. If the requirements are different, 4 or more crimp capsules can be designed and manufactured, which can be superimposed by two electric butterfly valves under certain conditions. There are five flange sealing forms at the end of electric butterfly valve and connecting plate: LHF, JBF, GF, HF and ZF.
What are the three types of electric butterfly valve connections?
1. Looper flange connection mode: the size of the electric butterfly valve at both ends is much smaller than the maximum outer diameter of the winding bag, and it does not need to use a special flange ring and a common end plate for fixed connection;
2. Self sealing type: self sealing without flange connection pressure enters the end plate filled with compressed air
3. Fixed flange connection type: the edge size at both ends of the electric butterfly valve is equal to or slightly less than the maximum outer diameter of the crankshaft. After drilling several holes, use the blue ring to fasten the connection with the end plate.
When the electric butterfly valve is assembled into the rear electric butterfly valve of the assembly, compressed air is charged into the electric butterfly valve. For more information on the use of electric butterfly valves in industry, please visit the official website of Shanghai Dongfeng Pump Valve Factory: //www.dongfengfamen.com/
1. Electric butterfly valve: it is a high elastic body made of common materials. The elastic modulus of butterfly valve is very small, and the elastic deformation of butterfly valve is large to absorb shock and vibration. It can bear multiple loads at the same time, but its resistance to high temperature and oil is worse than that of steel butterfly valve. If there are special requirements, it can be made into oil resistant. The product has good damping effect, small resonance field, long service life, low cost and good cold resistance. Good air tightness, waterproof and electrical insulation are good choices for vibration reduction.
2. Composite butterfly valve: composed of high-quality vulcanized and metal spiral butterfly valve and its outer package. The metal butterfly valve and butterfly valve are integrated to overcome the shortcomings of the metal butterfly valve, such as high rigidity, high working noise, small bearing capacity, poor appearance, mechanical and other functions of the butterfly valve, high load, large deformation and other advantages, better vibration and noise reduction effect, stable operation, and short resonance range.
1. Surface layer: protect the carcass, resist various external environmental pollution and seal;
2. High strength skeleton layer: control tension and bear load pressure;
3. Property inner layer: It can seal the compressed air in the air chamber and bear the air pressure. Electric butterfly valve upwind and. point
1. Variable selection of butterfly valve height, bearing capacity and butterfly valve stiffness:
When in use, the butterfly valve height, bearing capacity and stiffness can be widely selected to achieve its soft butterfly valve performance.
Height of butterfly valve: height control valve can be used to properly control the height of electric butterfly valve according to the use requirements, and maintain a certain height when the load on the spring changes.
Bearing capacity: for electric butterfly valves of the same size, different bearing capacity can be obtained by changing the internal pressure, which is roughly proportional to the internal pressure. This enables the unified electric butterfly valve to adapt to various load requirements.
Stiffness of butterfly valve: when designing the stiffness of electric butterfly valve, it can be selected by changing the internal pressure of the butterfly valve. The stiffness is roughly proportional to the internal pressure. Therefore, the stiffness can be selected very low as required. For an automobile air valve with a given size, the stiffness is variable and changes with the change of load, so the natural vibration frequency is almost constant under any load, Therefore, it can make the supported system have almost constant function.
1. The inherent vibration frequency of the electric butterfly valve is relatively low. The electric butterfly valve is connected to the additional air chamber, but the inherent vibration frequency of the electric butterfly valve device is reduced to 0.5~3Hz. Under any load, the electric butterfly valve can maintain a low and nearly equal vibration frequency.
2. High frequency vibration isolation and good noise isolation effect
The electric butterfly valve is composed of air and has small internal friction, which will not affect the ability to isolate high-frequency vibration due to the inherent vibration of the butterfly valve itself. In addition, the electric butterfly valve has no metal to metal contact, so its noise isolation and anti noise effect are very good.
3. The damping effect of available air
An orifice is added between the electric butterfly valve and the additional air chamber. When the load on the spring vibrates, the air flows through the orifice and loses energy, thus playing a role in vibration attenuation.
4. Long service life
The fatigue resistance function of electric butterfly valve is many times better than that of metal butterfly valve. For the fatigue test of the butterfly valve in the vehicle's electric butterfly valve suspension system, the steel plate butterfly valve was broken after only hundreds of thousands of vibrations, while the electric butterfly valve was still intact after 5 million vibrations at the amplitude of 40 mm and the frequency of 2.7 Hz (160 times/min).
5. Body structure
The body structure of the electric butterfly valve is soft, so it has a comprehensive vibration isolation effect in axial, transverse and rotary directions.
6. Manufacturing and installation
The valve is relatively inexpensive, easy to install and replace, and simple to maintain, without frequent inspection and refueling.