Double-end surface mechanical seal monitoring device of fluid centrifugal pump

Abstract

The invention discloses a double-end surface mechanical seal monitoring device of a fluid centrifugal pump. The device comprises a pressure stabilizer, a first connecting pipe and a second connecting pipe; the pressure stabilizer includes a shell, a top cover, a bottom cover, a piston, a compression spring, an observing cover and a piston rod; the piston is positioned in the shell, and divides a cavity in the shell into a first cavity and a second cavity; the observing cover is tightly mounted on the top cover; one end of the piston rod is positioned in the first cavity, and is mounted on the piston; the other end of the piston rod extends out of the top cover, and extends in the observing cover; the first cavity is filled with a sealing medium; the shell is respectively provided with a first connecting port and a second connecting port; one end of the first connecting port is communicated with the first cavity; the other end of the first connecting pipe is communicated with a sealing cavity chamber formed by a double-end surface mechanical seal of the fluid centrifugal pump and a sealing base; one end of the second connecting port is communicated with the second cavity; and elastic force of the compression spring and the pressure of a liquid collecting chamber are equal to the pressure in the first cavity. The device can guarantee accuracy of monitoring data.

Description

Technical field [0001] The invention relates to the field of seal monitoring devices, in particular to a double-end face mechanical seal monitoring device of a fluid centrifugal pump. Background technique [0002] The fluid centrifugal pump is used to transport unstable media. The media generally has the characteristics of easy vaporization, low ignition point, low viscosity, etc. The media can be liquefied petroleum gas, sulfonic acid, etc., taking liquefied petroleum gas as an example, liquefied petroleum gas It is in a gaseous state under normal temperature and pressure. In order to facilitate transportation, the liquefied petroleum gas is generally liquefied into a liquid state under high pressure before being transported. [0003] Due to the particularity of the transport medium, the mechanical seal on the pump shaft of the fluid centrifugal pump is required to be very reliable. In order to ensure the reliability of the mechanical seal, the fluid centrifugal pump adopts a doub...

AI Technical Summary

Problems solved by technology

[0005] When the leaked medium flows into the monitoring box, due to the sudden decrease in pressure, part of the medium is vaporized, resulting in a decrease in the volume of the liquid and a decrease in the volume of the medium detected by the liquid level gauge, which in turn leads to inaccurate monitoring data and the failure of the pipeline. Not closed, easy to cause hazards

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