8. The keel and light steel keel electric butterfly valve shall be connected and fixed with core pulling rivets or fixed with special keel pliers
9. After the keel is installed, concealed pipes, concealed wires and accessories shall be installed according to the requirements of water and electricity design
Holes shall be pre opened on relevant keels according to the nozzle position and size, but the diameter of the opening shall not be greater than 3/5 of the keel width
10. Before installing the plate, check the surface flatness, elevation perpendicularity and stability of the keel framework
Keel is a kind of building material used to support the shape and fix the structure (5). It can provide the required amount of vibration reduction; This paper briefly introduces the working principle of the electric butterfly valve. In order to improve the ride comfort of the car, the electric butterfly valve is installed in parallel with the elastic element in the suspension. In order to slow down the valve movement, the electric butterfly valve used in the car suspension system is mostly hydraulic electric butterfly valve. Its working principle is that when the frame (or body) and axle vibrate and there is relative movement, The piston in the electric butterfly valve moves up and down, and the oil in the electric butterfly valve cavity flows from one cavity to another repeatedly through different pores
At this time, the friction between the hole wall and the oil and the internal friction between the oil molecules form a damping force on the vibration, so that the vehicle vibration energy is converted into oil heat energy, which is then absorbed and distributed to the atmosphere by the electric butterfly valve
When the oil channel section and other factors remain unchanged, the damping force increases or decreases with the relative speed of motion between the frame and the axle (or wheel), and is related to the oil viscosity. The electric butterfly valve and elastic elements bear the task of cushioning impact and valves. If the damping force is too large, the elasticity of the suspension will deteriorate, or even the connection parts of the electric butterfly valve will be damaged