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High-pressure-resistant reverse needle valve

A needle valve, high pressure resistant technology, applied in valve details, valve device, parts contacting between valve elements and valve seat, etc., can solve the problem of limited service life extension, improve stability, excellent corrosion resistance, etc. performance, the effect of good anti-corrosion performance

Inactive Publication Date: 2020-08-28
ZHEJIANG FANGDUN INSTR VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above technical solutions, the prolongation of the service life only through the improvement of the structure is still relatively limited, and needs to be improved.

Method used

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  • High-pressure-resistant reverse needle valve
  • High-pressure-resistant reverse needle valve
  • High-pressure-resistant reverse needle valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A high-pressure resistant reverse needle valve includes a valve body, a valve core, an elastic member and a valve stem. Among them, the surface of the valve core, the elastic member and the valve stem are all coated with anti-corrosion coating, and the anti-corrosion coating raw materials include: 20 parts of acrylic resin, bisphenol A epoxy resin (E-44) 33 6 parts, 6 parts of phenalkamine curing agent (T-31), 5 parts of titanium dioxide nanofibers, 20 parts of zinc sulfate, 0.8 parts of coupling agent (KH-550), 6 parts of barium sulfate, 1.4 parts of silicon carbide, 35 parts of deionized water share. The weight ratio of titanium dioxide nanofibers and zinc sulfate is 1:4.

[0040] Wherein, the method for loading zinc sulfate on titanium dioxide nanofibers comprises the following steps:

[0041] S1, taking zinc sulfate and adding distilled water and stirring continuously until dissolved to obtain a saturated solution of zinc sulfate, which is transferred to the react...

Embodiment 2

[0050] A high-pressure resistant reverse needle valve includes a valve body, a valve core, an elastic member and a valve stem. Among them, the surface of the valve core, the elastic member and the valve stem are all coated with anti-corrosion coating, and the anti-corrosion coating raw materials include: 20 parts of acrylic resin, bisphenol A epoxy resin (E-44) 33 6 parts, 6 parts of phenalkamine curing agent (T-31), 5 parts of titanium dioxide nanofibers, 20 parts of zinc sulfate, 0.8 parts of coupling agent (KH-550), 6 parts of barium sulfate, 1.4 parts of silicon carbide, 35 parts of deionized water share.

[0051] The preparation method of anticorrosion coating comprises the following steps:

[0052] S1, mix epoxy resin, acrylic resin and deionized water with each other and stir thoroughly;

[0053] S2, add coupling agent, fully stir evenly;

[0054]S3, add barium sulfate, zinc sulfate, titanium dioxide nanofibers, silicon carbide, fully stir evenly;

[0055] S4, befor...

Embodiment 3

[0057] A high-pressure resistant reverse needle valve includes a valve body, a valve core, an elastic member and a valve stem. Among them, the surface of the valve core, the elastic member and the valve stem are all coated with anti-corrosion coating, and the anti-corrosion coating raw materials include: 20 parts of acrylic resin, bisphenol A epoxy resin (E-44) 33 6 parts, 6 parts of phenalkamine curing agent (T-31), 5 parts of titanium dioxide nanofibers, 0.8 parts of coupling agent (KH-550), 6 parts of barium sulfate, 1.4 parts of silicon carbide, and 35 parts of deionized water. The weight ratio of titanium dioxide nanofibers and zinc sulfate is 1:4.

[0058] The preparation method of anticorrosion coating comprises the following steps:

[0059] S1, mix epoxy resin, acrylic resin and deionized water with each other and stir thoroughly;

[0060] S2, add coupling agent, fully stir evenly;

[0061] S3, add barium sulfate, titanium dioxide nanofiber, silicon carbide, fully s...

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Abstract

The invention discloses a high-pressure-resistant reverse needle valve. The valve comprises a valve body, a valve core, an elastic piece and a valve rod, wherein the surfaces of the valve core, the elastic piece and the valve rod are coated with anticorrosive coatings, and the anticorrosive coatings comprise, by weight in parts, 10-30 parts of acrylic resin, 20-40 parts of epoxy resin, 4-8 parts of curing agents, 2.5-5 parts of titanium dioxide nanofibers, 0.5-1.5 parts of coupling agents, and 30-50 parts of deionized water. The epoxy resin can be cured and cross-linked to produce a firm and stable net structure, the epoxy resin structure contains hydroxyl and ether bonds with extremely high polarity, and therefore, the coatings are excellent in heat resistance and corrosion resistance, and have good heat resistance, wear resistance, high pressure resistance and corrosion resistance effects. The titanium dioxide nanofibers have excellent corrosion resistance while capable of being usedas coating filler, and can effectively improve the corrosion resistance of the coating. In addition, the titanium dioxide nanofibers can also play a role in anchoring in the net structure, thereby further improving the stability of the coating.

Description

technical field [0001] The invention relates to the technical field of needle valves, more specifically, it relates to a high pressure resistant reverse needle valve. Background technique [0002] The needle valve is an important part of the pipeline system. The needle valve is a valve that can achieve precise adjustment and control, and can be applied to various fields, such as oil and gas field sites. [0003] The Chinese patent with the notification number CN104455470B discloses a high-pressure resistant reverse needle valve, which includes a valve body, a valve core, an elastic member and a valve stem. A liquid passage is provided in the valve body to communicate with the outside, and a top of the liquid passage is provided to communicate with the outside. There is a bayonet in the liquid channel, and the two sides of the bayonet are respectively provided with an inlet and an outlet; One clamp and the second clamp, the movable distance of the valve core in the bayonet i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K25/00C09D163/02C09D133/04C09D5/08C09D7/62C09D7/61C08G59/62
CPCC08G59/62C08K2003/3045C08K2201/011C08K2201/014C08L2201/08C09D5/08C09D163/00C09D7/61C09D7/62C09D7/70F16K25/005C08L33/04C08K13/06C08K9/12C08K3/30C08K7/08C08K3/34
Inventor 张锦
Owner ZHEJIANG FANGDUN INSTR VALVE CO LTD
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