Pressure stabilizing device of metering pump

Abstract

The invention discloses a pressure stabilizing device of a metering pump, comprising a containing cavity installed in a valve body and a pressure cover hermetically fixed outside a containing cavity; the containing cavity is provided with a liquid inlet and a liquid outlet both communicated with the fluid flow passage of the metering pump; a lower valve body tightly matched with the liquid outlet is arranged at the liquid outlet; the lower valve body is provided with a guide flow passage communicated with the liquid flow passage of the metering pump; a pressure sealing piece is installed by matching the guide flow passage; a first elastic piece is installed between the pressure sealing piece and the pressure cover; the pressure of the liquid in the containing cavity controls the opening and closing of the pressure sealing piece and the guide flow passage; the liquid in the containing cavity enables the pressure sealing piece to lose the pressure to seal the guide flow passage, that is the stable pressure of the metering pump; the top of the pressure cover is provided with an adjusting screw; and the adjusting screw can be used for changing the pressure value of forcing the pressure sealing piece to not seal the guide flow passage. The device has simple structure and high stability precision, and the pressure can be freely adjusted.

Description

technical field [0001] The invention relates to a pressure stabilizing device for a metering pump which can ensure that the pressure of the metering pump is stable at a specific value. Background technique [0002] As we all know, the metering pump is a special positive displacement pump that can meet the needs of various strict technological processes. The flow rate can be adjusted steplessly in the range of 0-100%. It is called quantitative pump or proportional pump. Metering pump belongs to reciprocating positive displacement pump. It is used for precise metering. It is usually required that the stability accuracy of metering pump should not exceed ±1%. With the continuous development of modern industry towards automatic operation and remote automatic control, the advantages of metering pumps, such as strong matching and wide adaptability to medium (liquid), are particularly outstanding. At present, they are widely used in petrochemical, chemical, It is used to quantitat...

AI Technical Summary

Problems solved by technology

With the continuous development of modern industry towards automatic operation and remote automatic control, the advantages of metering pumps, such as strong matching and wide adaptability to medium (liquid), are particularly outstanding. At present, they are widely used in petrochemical, chemical, It is used to quantitatively transport various chemical additives in various industrial processes such as electric power, water treatment, and pharmaceuticals, but the traditional metering pump cannot guarantee that the pressure of the liquid in the pump is always stable at a specific pressure value, resulting in low stability and accuracy of the metering pump

Images