High-temperature resistance plastics centrifugal pump

Abstract

The invention relates to a high-temperature resistance plastics centrifugal pump, which comprises a pump body, an impeller, a pump cover, a motor, a thermostability mechanical seal component and other attached components, wherein the thermostability mechanical seal component is composed of a static ring, a moving ring, a spring seat, a static ring gland, a cooling water jacket and an acid-blocking piece; the spring seat is fixed on an impeller shaft; the outer surface of the spring seat is directly taken as a seal rotating shaft; the spring seat is provided with a spring and an O-shaped seal ring which is used for separating corrosive medium from metal pieces; the cooling water jacket is provided with a cooling water nozzle and a framework oil seal; the framework is matched with the spring seat to form the cooling water seal; the pump body, impeller and pump cover form a flow passage component of the pump, are respectively made of thermostability corrosion-resisting plastic through compression molding and comprise all-plastic and pump cover structure forms. The pump has the characteristics of being reasonable and compact in structure, reliable to mount and use, can avoid the influence on the precision of mechanical sealing by the deformation of plastics due to heating, greatly prolong the service life, can resist high temperature and effectively operate in strong corrosion environment for a long time and the like.

Description

Technical field [0001] The present invention relates to a high temperature resistant plastic centrifugal pump, which belongs to the technical field of fluid machinery. Background technique [0002] At present, the plastic centrifugal pumps used in the high temperature and strong corrosive environment in the market are mainly fluoroplastic centrifugal pumps. The theoretical use temperature of the flow parts reaches 180°, but the commonly used single-end mechanical seals are not equipped with cooling and flushing devices, and the operating life is extremely It is short-lived, mostly under 4 weeks, which seriously affects the normal use of the pump. As a result, the use of plastic centrifugal pumps in high temperature and strong corrosive environments is very limited. Users have to replace them with precious metal pumps. Even so, they still cannot meet some strong corrosion. For environmental use, centrifugal pump manufacturers have designed some simple mechanical seal cooling devi...

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Problems solved by technology

[0002] At present, the plastic centrifugal pumps used in high temperature and strong corrosive environment are mainly fluorine plastic centrifugal pumps. The theoretical operating temperature of the flow-passing parts reaches 180°. However, the commonly used single-end mechanical seals do not have a cooling and flushing device, and the operating life is extremely short. It is short-lived, mostly less than 4 weeks, which seriously affects the normal use of the pump. As a result, the use of plastic centrifugal pumps in high-temperature and strong-corrosion environments is very limited. Users have to replace them with precious metal pumps. Even so, they still cannot satisfy some strong corrosion For the use of the environment, centrifugal pump manufacturers have designed some simple mechanical seal cooling devices. The installation is limited by the position and the structural design is unreasonable. The moving ring is fixed on the shaft covered with plastic, and the plastic is greatly deformed by the temperature, causing Cooling water and sealing medium leak quickly during operation, and the sealing effect is also not achieved;

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