Diaphragm-type pressure reducing valve with high-pressure entering and low-pressure discharging

Abstract

The utility model relates to a diaphragm-type pressure reducing valve with high-pressure entering and low-pressure discharging, and belongs to the technical field of diaphragm-type pressure reducing valves. A compression nut sealing element, a valve seat bearing seat and a valve seat are fixed in a compression nut fixing hole by a compression nut. When the valve seat bearing seat is pressed by thecompression nut, the upper end surface of the valve seat bearing seat abuts against the lower end surface of the compression nut, and the lower end surface of the valve seat bearing seat abuts against on the bottom end surface of the compression nut fixing hole. When the valve seat bearing seat is fixed, the valve seat and the compression nut seal are supported at the same time, so that the valveseat bearing seat greatly increases the pressure-bearing force of the valve seat, and it is guaranteed that the valve seat can bear he high-pressure impact of air inlet 6,000 psig for log time; a diaphragm sleeve is arranged, the overall strength of a diaphragm is improved, and the pressure bearing is improved; and the diaphragm and the diaphragm sleeve are tightly pressed on a lower seat of thediaphragm by an upper seat of the diaphragm, and the outer periphery edges of the diaphragm and the diaphragm sleeve are locked and fixed by a diaphragm compression steps and outer periphery surface of the upper end of a pressure reducing valve body. The diaphragm-type pressure reducing valve with high-pressure entering and low-pressure discharging can achieve the effects that the air inlet can reach 6,000 psig and the air output can reach 750 psig.

Description

technical field [0001] The invention belongs to the technical field of diaphragm pressure reducing valves, and in particular relates to a diaphragm type pressure reducing valve that enters high pressure and outputs low pressure. Background technique [0002] The pressure reducing valve is a valve that reduces the inlet pressure to a certain outlet pressure by adjusting, and relies on the energy of the medium itself to automatically maintain the outlet pressure. From the point of view of fluid mechanics, the pressure reducing valve is a throttling element whose local resistance can be changed, that is, by changing the throttling area, the flow velocity and the kinetic energy of the fluid are changed, resulting in different pressure losses, so as to achieve the purpose of decompression. The pressure reducing valve relies on the adjustment of the control and regulation system to balance the fluctuation of the pressure behind the valve with the spring force, so that the pressure...

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Problems solved by technology

[0003] However, the ordinary diaphragm pressure reducing valve can only reach 3500 psig inflow and 500 psig in the outlet. There is only a single diaphragm in the ordinary diaphragm pressure reducing valve, and the single diaphragm is easy to deform and rupture when the pressure is too high, resulting in bearing failure. The pressure capacity is weak. The combination of a single compression nut and a valve seat in the valve will cause the valve seat to be easily deformed after the intake pressure increases, which will reduce the precision of the pressure reducing valve and also lead to the weak pressure bearing capacity of the pressure reducing valve.

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