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Composite enamel for cast iron valves and its preparation and coating method

A valve, cast iron technology, applied in the field of valve inner surface treatment technology, can solve the problems of secondary pollution, salt resistance, and the cast iron valve is not environmentally friendly, and achieves the effect of good salt resistance, enhanced adhesion and toughness

Active Publication Date: 2017-05-17
TONGLING TIANHAI FLUID CONTROL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problems that the existing cast iron valves are not environmentally friendly, prone to secondary pollution, not resistant to acid, alkali and salt, and have low surface smoothness. Composite enamel for inner surface of cast iron valve with high flatness and strong adhesion and preparation and coating method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1: Composite enamel for cast iron valves, which includes in parts by weight: 30 parts of silicon dioxide, 10 parts of talc, 5 parts of silicon carbide, 15 parts of sodium silicate, 20 parts of borax, 8 parts of titanium dioxide, 6 parts of activated calcium carbonate, 4 parts of zinc oxide, 12 parts of epoxy resin and 3 parts of polyvinyl chloride.

[0009] The preparation and coating method of composite enamel for cast iron valves includes the following steps: (1) Preparation of rubber compound: mix 12 parts of epoxy resin, 6 parts of activated calcium carbonate and 4 parts of zinc oxide and grind uniformly Put it into a powder mixture and mix it in an internal mixer for 20 minutes. During the mixing process, add 20 parts of borax in two times, add 30% borax for the first time, and 70% borax for the second time. When the temperature reaches Discharge starts at 530°C, and the discharged materials are naturally cooled to room temperature to obtain rubber compound A;...

Embodiment 2

[0010] Example 2: Composite enamel for cast iron valves, which includes in parts by weight: 35 parts of silicon dioxide, 15 parts of talc, 8 parts of silicon carbide, 20 parts of sodium silicate, 25 parts of borax, 10 parts of titanium dioxide, 8 parts of activated calcium carbonate, 6 parts of zinc oxide, 14 parts of epoxy resin and 5 parts of polyvinyl chloride.

[0011] The preparation and coating method of composite enamel for cast iron valves includes the following steps: (1) Preparation of rubber compound: 14 parts of epoxy resin, 8 parts of activated calcium carbonate and 6 parts of zinc oxide are mixed uniformly and ground Put it into a powder mixture and mix it in an internal mixer for 25 minutes. During the mixing process, add 25 parts of borax, add 30% borax for the first time, and 70% borax for the second time. When the temperature reaches Discharge starts at 540°C, and the discharged materials are naturally cooled to room temperature to obtain rubber compound A; mix ...

Embodiment 3

[0012] Example 3: Composite enamel for cast iron valves, which includes in parts by weight: 40 parts of silicon dioxide, 20 parts of talc, 10 parts of silicon carbide, 25 parts of sodium silicate, 30 parts of borax, 12 parts of titanium dioxide, 10 parts of activated calcium carbonate, 8 parts of zinc oxide, 16 parts of epoxy resin and 7 parts of polyvinyl chloride.

[0013] The preparation and coating method of composite enamel for cast iron valves includes the following steps: (1) Preparation of rubber compound: 16 parts of epoxy resin, 10 parts of activated calcium carbonate and 8 parts of zinc oxide are mixed uniformly and ground Into the powdery mixture, put it into the internal mixer for mixing for 30 minutes. During the mixing process, add 30 parts of borax in two times, add 30% borax for the first time, and 70% borax for the second time. When the temperature reaches Discharge starts at 550°C, and the discharged material is naturally cooled to room temperature to obtain ru...

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PUM

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Abstract

The invention discloses composite enamel for a cast iron valve, and a preparation and coating method for the composite enamel. The composite enamel comprises the following components in parts by weight: 30-40 parts of silicon dioxide, 10-20 parts of talcum powder, 5-10 parts of silicon carbide, 15-25 parts of sodium silicate, 20-30 parts of borax, 8-12 parts of titanium dioxide, 6-10 parts of activated calcium carbonate, 4-8 parts of zinc oxide, 12-16 parts of epoxy resin and 3-7 parts of polyvinyl chloride. The composite enamel has the benefits that epoxy resin and polyvinyl chloride are used as important accessories of a mixed adhesive, so that the adhesion and toughness of the enamel are enhanced, a formed enamel protective layer has not only rigidity and smoothness, but also a certain elasticity; through a repeated coating method, a mixed solution can be in contact with the inner wall of the valve fully and uniformly; the thickness of the composite enamel can be controlled as required.

Description

Technical field [0001] The invention relates to a valve inner surface treatment process, in particular to a composite enamel used for the inner surface treatment of a cast iron valve and a preparation and coating method thereof. Background technique [0002] The valve (famen) is a control component in the fluid delivery system, which has the functions of cut-off, regulation, diversion, prevention of reverse flow, stabilization, diversion or overflow and pressure relief. Valves used in fluid control systems, ranging from the simplest shut-off valves to the various valves used in extremely complex automatic control systems, have a wide variety and specifications. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. Valves are also divided into cast iron valves, cast steel valves, stainless steel valves (201, 304, 316, etc.), chromium molybdenum steel valves, chromium moly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C8/00C23D5/02
Inventor 王胜原查金平
Owner TONGLING TIANHAI FLUID CONTROL CO LTD
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