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Rust-proof butterfly valve casting and machining method thereof

A processing method and casting technology, which is applied in the field of rust-proof butterfly valve castings and its processing, and can solve problems such as valve corrosion

Active Publication Date: 2022-04-15
WENZHOU HAIGE VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since many valves are used in the open air, and some valves are not opened and closed once for several months or even one or two years, it is easy to cause valve corrosion. Therefore, the current valve castings still need to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]This embodiment discloses a rust-proof butterfly valve casting and a processing method thereof; a rust-proof butterfly valve casting includes a casting body, and the surface of the casting body is treated by a surface treatment agent; the surface treatment agent includes the following components: dodecenyl Succinic acid, pentaerythritol phosphate, polyvinyl chloride paste resin, diglycidyl hexahydrophthalate, isopropanol, p-toluenesulfonic acid and metal deactivators, wherein the metal deactivators are benzotriazole derivatives .

[0044] A processing method for an antirust butterfly valve casting, comprising the steps of:

[0045] S1. Preparation of surface treatment agent: mix dodecenylsuccinic acid and pentaerythritol phosphate, add p-toluenesulfonic acid, heat up to 40°C, stir for 30 minutes, and obtain an esterification product;

[0046] Mix polyvinyl chloride paste resin, diglycidyl hexahydrophthalate and isopropanol, and stir at 30°C for 20 minutes; then add the ...

Embodiment 2

[0050] This embodiment discloses a rust-proof butterfly valve casting and a processing method thereof; a rust-proof butterfly valve casting includes a casting body, and the surface of the casting body is treated by a surface treatment agent; the surface treatment agent includes the following components: dodecenyl Succinic acid, pentaerythritol phosphate, polyvinyl chloride paste resin, diglycidyl hexahydrophthalate, isopropanol, p-toluenesulfonic acid and metal deactivators, wherein the metal deactivators are benzotriazole derivatives .

[0051] A processing method for an antirust butterfly valve casting, comprising the steps of:

[0052] S1. Preparation of surface treatment agent: mix dodecenylsuccinic acid and pentaerythritol phosphate, add p-toluenesulfonic acid, heat up to 50°C, stir and react for 40 minutes, and obtain an esterification product;

[0053] Mix polyvinyl chloride paste resin, diglycidyl hexahydrophthalate and isopropanol, and stir at 35°C for 30 minutes; th...

Embodiment 3

[0057] This embodiment discloses a rust-proof butterfly valve casting and a processing method thereof; a rust-proof butterfly valve casting includes a casting body, and the surface of the casting body is treated by a surface treatment agent; the surface treatment agent includes the following components: dodecenyl Succinic acid, pentaerythritol phosphate, polyvinyl chloride paste resin, diglycidyl hexahydrophthalate, isopropanol, p-toluenesulfonic acid and metal deactivators, wherein the metal deactivators are benzotriazole derivatives .

[0058] A processing method for an antirust butterfly valve casting, comprising the steps of:

[0059] S1. Preparation of surface treatment agent: mix dodecenylsuccinic acid and pentaerythritol phosphate, add p-toluenesulfonic acid, heat up to 45°C, stir for 35 minutes to obtain an esterification product;

[0060] Mix polyvinyl chloride paste resin, diglycidyl hexahydrophthalate and isopropanol, and stir at 32°C for 25 minutes; then add the e...

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PUM

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Abstract

The rust-proof butterfly valve casting comprises a casting body, and the surface of the casting body is treated through a surface treating agent; the surface treating agent is prepared from the following components: dodecenylsuccinic acid, pentaerythritol phosphate, polyvinyl chloride paste resin, hexahydrophthalic acid diglycidyl ester, isopropanol, p-toluenesulfonic acid and a metal deactivator. The preparation method of the rust-proof butterfly valve casting comprises the steps of preparation of the surface treating agent and coating of the surface treating agent. In the application, a mixed product of dodecenylsuccinic acid and pentaerythritol phosphate has a relatively long hydrocarbon chain and an active phosphate group, and can be complexed with metal to form a compact monomolecular protective film, so that corrosion media are prevented from invading; the film forming quality is improved by the polyvinyl chloride paste resin with plasticizing performance; the hexahydrophthalic acid diglycidyl ester with high toughness contains polar groups, so that the affinity of the surface treating agent and metal is improved, the overall performance of a film layer can be improved, and the corrosion resistance of the treated butterfly valve casting is improved.

Description

technical field [0001] The application relates to the technical field of valve castings, in particular to a rust-proof butterfly valve casting and a processing method thereof. Background technique [0002] Butterfly valve is a regulating valve used for cutting off or throttling various types of fluids such as water, corrosive medium, mud, oil, liquid metal, etc. in pipelines. [0003] At present, the Chinese patent with the notification number CN212775629U discloses a butterfly valve casting, including a valve body, a fixed block is connected to the top of the valve body, mounting plates are connected to the outer sides of both ends of the valve body, and a handwheel is connected to the top of the fixed block. The inner wall of the valve body is equipped with a valve seat, the bottom end of the hand wheel is connected to the valve stem, the outer side of the valve stem is located inside the fixed block and a sealing block is installed, the outer side of the bottom end of the...

Claims

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Application Information

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IPC IPC(8): C10M169/04F16K27/02C10N30/10C10N30/12C10N50/02
Inventor 王加福王良辉黄庆双
Owner WENZHOU HAIGE VALVE CO LTD
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