Circulating water pump mechanical seal backwashing device

Abstract

The invention relates to a circulating water pump mechanical seal backwashing device. A water pump upper cover (1) is in threaded connection with a first three-way connector (10); the first three-way connector(10), a first switching valve (13), a second three-way connector (11), a free end flushing water pipe (15) and a free end mechanical seal (3) are sequentially connected; the second three-way connector (11), a first blow-down valve (8) and a first elbow (6) are connected in sequence; the first three-way connector (10), a second switching valve (14), a third three-way connector (12), a load end flushing water pipe (16) and a load end mechanical seal (2) are sequentially connected; and the third three-way connector (12), a second blow-down valve (9) and a second elbow (7) are sequentially connected. The device is low in cost, simple in structure, convenient to operate and obvious in effect in practical application, the running stability of a pump is improved, the equipment failure rate is reduced, and the maintenance cost and the workload of personnel are reduced.

Description

Technical field: [0001] The present invention relates to a circulating pump mechanical seal backwashing means. Background technique: [0002] Circulating pump as a fluid delivery device, which is characterized by large flow rate and low head, stable and reliable operation, is widely used in industrial production, a rotary device as circulating pumps, equipped on both sides of the shaft end sealing means are required to prevent the pump with a pressure medium leakage outwardly, causing pollution and loss of medium. And now commonly used form of mechanical seal sealing to prevent leakage of medium movement through the friction rings. Static ring during friction generated heat and mechanical impurities, whereby the need for a machine with a pressure and heat seal flushing impurities away water generated, to ensure long-term stable and reliable operation of the mechanical seal, will not destroy the . Using its most impeller outlet pressure medium used as the circulating pump mechanic...

AI Technical Summary

Problems solved by technology

Most circulating water pumps use the pressure medium at the outlet of their own impellers as the water source for mechanical seal flushing. This method saves space and cost, and requires less equipment, so it is widely used. The water quality often contains impurities, and the flushing water pipe of the mechanical seal is often blocked. The long-term operation of the mechanical seal without flushing water will cause damage, which will cause the equipment to be unusable and affect production.

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