(1) Structural principle 1) DBD type direct acting relief valve Figure 1 is a DBD direct acting relief valve structure diagram. The pressurized oil from the inlet acts on the bottom of the piston through the damping piston, creating a hydraulic force that counteracts the spring force. When the hydraulic pressure is less than the spring force of the pressure regulating spring, the cone valve closes and the valve can not afford the pressure regulating function. With the pressure of the inlet continue to rise. When the hydraulic pressure is greater than the spring force, the cone valve opens, the excess oil spilled back to the tank, the inlet pressure stability at the set value. Figure 1 DBD direct acting relief valve structure diagram a) to 40MPa valve structure; b) to 63MPa valve structure 1-adjusting screw; 2-valve body; 3- regulating spring; 4-drift plate; 5 - cone valve; 6- damping piston damping piston role: First, when the cone valve opening or closing damping effect, used to improve the stability of the valve pressure regulator; the second is the cone valve from the role of guide to improve the valve seal performance. The role of drift plate: drift plate has an open annular groove, to change the cone valve outlet flow direction. As a result, the drift plate is subjected to a hydrodynamic force that acts in the opposite direction to that of the spring force and increases as the amount of overflow increases. As the overflow increases, the spring force increases due to the increased cone valve opening. However, due to the increase of hydrodynamic force, the structure counteracts the increase of spring force. Therefore, this valve inlet pressure from the flow changes, the pQ characteristic curve is ideal, good opening and closing characteristics, help to improve the valve rated flow. (2) Application 1) Function as safety valve (to prevent overload of hydraulic system) The relief valve acts as a safety valve to limit the maximum pressure of the hydraulic system to ensure the safety of the system. In the normal operation of the system, the valve is closed without overflow, the system's working pressure depends on the external load. When the system pressure reaches the set pressure of the valve, the valve opens to overflow, at which point the system pressure depends on the set pressure of the relief valve. 2) From the role of overflow valve (to maintain a constant pressure of the hydraulic system) In the throttling speed control system, the relief valve is normally open during normal operation, the surplus oil is discharged back to the tank by overflow to maintain the pressure of the hydraulic system substantially constant . 3) The hydraulic system unloading pilot relief valve remote control port through the tank, you can use the relief valve to make the system unloading. DBW-type pilot-operated electromagnetic relief valve using its own solenoid valve to achieve system unloading, and other pilot relief valve to achieve system unloading, it is necessary to add a remote control port on the valve. 4) remote pressure regulator In the pilot relief valve remote control port on the remote pressure regulator, remote pressure can be achieved. In addition, the relief valve can also be used as a back pressure valve to make the system work smoothly; relief valve and valve with the multi-level system to achieve pressure control; in the brake circuit, the relief valve can be used to achieve system Action; In the hydraulic test stand system, relief valve can be used as loading valve.
High Frequency Welding Machine
High frequency welding machine, it provides a completely different finish than heat welding since its process it`s very different as well. This machine works with and electronic circuit that transmits a high frequency oscillation on a electric field alternating at high speed, the oscillation makes thermoplastic molecules to heat evenly to a melting point making them fuse completely after applying pressure and then refrigerating the materials resulting in a finished product that will be 100% waterproof with an airtight seal, flexible and with an impeccable visual finish while giving a higher stability, resistance and durability to projects with high climate exposure. Another advantage of radiofrequency its adaptability being able to penetrate on thicker materials or with multiple layers and adapt to different molds to cut on custom margins when needed. Some industries that benefit from this process are: automotive, medical, entertainment, stationery, fashion and household.
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