Built-in type double mechanical seal structure of plastic pump

Abstract

The invention discloses a built-in type double mechanical seal structure of a plastic pump. The seal structure comprises a plastic impeller, moving rings, static rings, a pump cover and a static ring gland, wherein the impeller is a plastic impeller; a first moving ring is mounted on the back of the impeller; a first static ring matched with the first moving ring is arranged in the pump cover and connected with the static ring gland through a first spring; the first spring is static and is not contacted with media; the pump cover is connected with the static ring gland; a spring seat is fixed on a shaft on one side, far away from the static ring gland, of the impeller; and a second moving ring is arranged on the spring seat, and a second static ring matched with the second moving ring is arranged on the contacted surface of the second moving ring on the spring seat and the static ring gland. The built-in type double mechanical seal structure has the benefits as follows: the plastic pump adopts the double mechanical seal structure, so that the coolant pressure of the mechanical seal atmospheric side can be increased to be larger than the pressure of a mechanical seal cavity, and toxic, flammable and combustible media can be prevented from being leaked.

Description

technical field [0001] The invention relates to a mechanical seal structure, more specifically, it relates to a plastic pump built-in double-face mechanical seal structure. Background technique [0002] The mechanical seal structure of the prior art plastic pump is single, generally an external single-end structure, which is easy to cause leakage when faced with harsh working conditions, and if the medium is toxic, flammable and explosive, it will cause serious safety hazards. Contents of the invention [0003] The object of the present invention is to overcome the deficiencies in the prior art, and provide a plastic pump built-in double-end mechanical seal structure with reasonable structure, good sealing performance, low medium leakage, and safety and reliability. [0004] The object of the present invention is achieved through the following technical solutions: the plastic pump built-in double-face mechanical seal structure includes a plastic impeller, a moving ring, a ...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the mechanical seal structure of the plastic pump is single, generally an external single-end structure, which is easy

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