Anti-corrosion bottom valve screen net surface treatment method

Abstract

The invention discloses a method for surface treatment of a corrosion-resistant bottom valve, which comprises the following steps: (1) soaking the bottom valve screen in an activation solution for 10-15 minutes; Spray paint on the net, spray two coats of paint on the outer surface of the screen, and one coat of paint on the inner surface; (3) Put the painted bottom valve screen in the oven, after drying, take it out, and let it cool down to room temperature naturally , The corrosion-resistant bottom valve screen is completed. By adopting the method of the present invention, the prepared pump bottom valve screen not only has excellent mechanical properties, will not be washed away by high-speed flowing water, but also has excellent corrosion resistance, and can effectively prolong the service life of the bottom valve screen. Greatly improved the quality of the pump bottom valve.

Description

technical field [0001] The invention belongs to the field of pump bottom valve manufacturing, and in particular relates to a surface treatment method for a corrosion-resistant bottom valve screen. Background technique [0002] The pump bottom valve is composed of valve body, valve cover, valve disc, sealing ring and gasket and other components. The valve disc of the pump bottom valve has several types such as single disc, double disc and multi disc. After the pump bottom valve is connected to the pipeline, the liquid medium enters the valve body from the direction of the valve cover, and the pressure of the liquid acts on the valve disc, so that the valve disc is opened to allow the medium to flow through. When the medium pressure in the valve body changes or disappears, the valve The flap closes to prevent media backflow. In order to effectively protect the impeller of the pump body, a screen is often installed at the bottom valve to reduce the inflow of debris. Among the...

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Problems solved by technology

Among them, the screen is divided into two types according to the material, plastic screen and alloy screen. The plastic screen has good anti-corrosion performance, but during its use, due to the excessive pressure of the water flowing into the bottom valve, it often appears Although the screens of some alloy products have excellent mechanical properties and are not easy to cause mechanical damage, their corrosion resistance is poor, which also severely limits the development of the field of pump bottom valves.

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