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External thread ferrule connector

A ferrule joint and external thread technology, applied in the direction of metal material coating process, etc., can solve the problems of difficult disassembly and reduced sealing performance.

Inactive Publication Date: 2020-07-10
ZHEJIANG FANGDUN INSTR VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the ferrule joint is usually used for a long time and does not need to be replaced, during long-term use, it is easy to cause the sealing performance to decline due to oxidation or make it difficult to disassemble for later maintenance, which needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] An externally threaded ferrule joint, the outer surface of each part of which is treated with a phosphating solution to form a phosphating film. In parts by weight, the components of the phosphating solution include 220 parts of phosphoric acid; 30 parts of zinc oxide; 17 parts of manganese carbonate 24 parts of PTFE; 22 parts of triethanolamine; 1.6 parts of copper nitrate; 8 parts of citric acid; 18 parts of sodium molybdate.

[0043] Wherein, phosphating solution treatment comprises the following steps:

[0044] S1, surface treatment: surface degreasing and rust removal, water washing;

[0045] S2, phosphating upper film: put into phosphating solution for phosphating;

[0046] S3, drying: heating and drying at 60-90°C, washing with water, and drying naturally.

Embodiment 2

[0048] An externally threaded ferrule joint, the outer surface of each part of which is treated with a phosphating solution to form a phosphating film. In parts by weight, the components of the phosphating solution include 220 parts of phosphoric acid; 30 parts of zinc oxide; 17 parts of manganese carbonate 24 parts of emulsifying agent OP-1024 parts; 22 parts of triethanolamines; 1.6 parts of copper nitrate; 8 parts of citric acid; .

[0049] Wherein, phosphating solution treatment comprises the following steps:

[0050] S1, surface treatment: surface degreasing and rust removal, water washing;

[0051] S2, phosphating upper film: put into phosphating solution for phosphating;

[0052] S3, drying: heating and drying at 60-90°C, washing with water, and drying naturally.

Embodiment 3

[0054] An externally threaded ferrule joint, the outer surface of each part of which is treated with a phosphating solution to form a phosphating film. In parts by weight, the components of the phosphating solution include 220 parts of phosphoric acid; 30 parts of zinc oxide; 17 parts of manganese carbonate 24 parts of PTFE; 22 parts of sodium nitrite; 1.6 parts of copper nitrate; 8 parts of citric acid;

[0055] Wherein, phosphating solution treatment comprises the following steps:

[0056] S1, surface treatment: surface degreasing and rust removal, water washing;

[0057] S2, phosphating upper film: put into phosphating solution for phosphating;

[0058] S3, drying: heating and drying at 60-90°C, washing with water, and drying naturally.

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PUM

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Abstract

The invention discloses an external thread ferrule connector. The ferrule connector is characterized in that a phosphating film is formed on the outer surface of each part of the ferrule connector through phosphating solution treatment, wherein a phosphating solution comprises, by weight, 210-240 parts of phosphoric acid, 30-40 parts of zinc salt, 15-20 parts of manganese salt, 20-25 parts of a dispersant and 20-25 parts of an accelerant. After the ferrule connector is put into the phosphating solution, the anodic oxidation process of Fe occurs on the surface of the ferrule connector, and substances such as Fe (H2PO4) 2, Zn (H2PO4)2, Zn3 (PO4) 2.4H2O and Zn2Fe (PO4) 2.4H2O are generated; when phosphating reaction is carried out until the concentration of each substance correspondingly reaches respective solubility product, insoluble phosphates form crystal nucleuses on active points on the surface of the ferrule connector, and the crystal nucleuses are taken as the center to continuously extend and grow towards the periphery of the surface to form crystals until the continuous and uniform phosphating film is formed on a treated metal surface; and meanwhile, the manganese salt can accelerate the anodic oxidation process of Fe on the surface of the ferrule connector as well as the film forming speed of the phosphating film on the metal surface, so that the continuous, uniform andcompact phosphating film is formed on the surface of the ferrule connector, and a continuous protection effect is achieved.

Description

technical field [0001] The present invention relates to the technical field of connectors, more specifically, it relates to an external thread ferrule joint. Background technique [0002] The ferrule-type pipe joint is composed of three parts: joint body, ferrule, and nut, and is widely used in many industries such as chemical industry, pharmaceuticals, petroleum, scientific experiments, and electrical engineering. When the ferrule and the nut sleeve are inserted into the joint body on the steel pipe, and when the nut is tightened, the outside of the front end of the ferrule fits the conical surface of the joint body, and the inner blade evenly bites into the seamless steel pipe to form an effective seal. [0003] The Chinese patent with the publication number CN204114387U discloses a ferrule-type pipe joint, which includes a joint body, a ferrule and a connecting pipe. Thread, the outer wall of the other end is provided with a second external thread, the ferrule includes a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/07C23C22/42
CPCC23C22/07C23C22/42
Inventor 张锦
Owner ZHEJIANG FANGDUN INSTR VALVE CO LTD
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