I. Core Working Principle
The Plastic Magnetic Drive Pump is based on magnetic coupling transmission and centrifugal force for medium conveyance, enabling leak-free transportation of acid and alkali media. The specific process involves three steps:
- Power Transmission: The motor drives the external driving magnet to rotate. Through the magnetic field penetrating the plastic isolation sleeve, the internal driven magnet and impeller are driven to rotate synchronously, without the need for traditional shaft connection.
- Medium Conveyance: When the impeller rotates, it generates centrifugal force to suck the acid and alkali media in the pump cavity, pressurize them, and then discharge them from the outlet, completing the medium conveyance.
- Sealing and Leak Prevention: The traditional mechanical shaft seal is eliminated. Only the plastic isolation sleeve is used for physical isolation between the medium and the outside, completely solving the leakage problem of acid and alkali media caused by shaft seal wear.
II. Core Structure and Anti-Corrosion Key Points
The structural design focuses on the core requirements of “corrosion resistance + leak-free”. The key components and their functions are as follows:
- Isolation Sleeve and Pump Body: Made of corrosion-resistant plastics (such as F46, PVDF), they are the core components for isolating acid and alkali media, which can not only resist strong corrosion but also prevent medium leakage.
- Impeller: Mostly made of plastic or reinforced plastic, it has both corrosion resistance and structural strength. It generates centrifugal force when rotating and is the executive component for medium conveyance.
- Internal and External Magnets: Usually made of neodymium-iron-boron material (with anti-corrosion treatment on the surface), they realize non-contact transmission through the force of the magnetic field and are the core of power transmission.
- Bearings: Generally made of silicon carbide (SiC) material, they have excellent acid and alkali resistance and wear resistance, providing stable support for the rotation of the impeller.
III. Typical Application Scenarios
With the dual advantages of strong corrosion resistance and zero leakage, it is widely used in fields that require safe transportation of strong corrosive media such as acids and alkalis:
- Chemical Industry: Conveying sulfuric acid, nitric acid, hydrochloric acid, hydrofluoric acid, sodium hydroxide (strong alkali) solutions, and organic solvents such as methanol and ethanol.
- Environmental Protection Industry: Treating corrosive waste liquids such as pickling wastewater, electroplating wastewater, desulfurization and denitrification circulating liquid, and acid-alkali waste gas absorption liquid.
- Pharmaceutical/Food Industry: Conveying acidic liquid medicines (such as intermediates in the vitamin synthesis process) and alkaline cleaning liquids that meet hygiene standards (food-grade plastic materials must be selected).
- Electronics Industry: In semiconductor manufacturing, conveying high-precision and strong corrosive process media such as hydrofluoric acid etching solution and photoresist diluent.