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Inner hole dual-fuel supersonic flame spray gun and spray method

A supersonic flame, dual-fuel technology, applied in metal material coating process, coating, melt spraying and other directions, can solve the problems of especially serious oxidation, easy to be oxidized, etc., to reduce the size of the gun body, uniform airflow, good deposition effect

Pending Publication Date: 2022-01-21
中机凯博表面技术江苏有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the powder is accelerated in the flame, it is easy to be oxidized, especially when using ultra-fine powder for spraying

Method used

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  • Inner hole dual-fuel supersonic flame spray gun and spray method
  • Inner hole dual-fuel supersonic flame spray gun and spray method
  • Inner hole dual-fuel supersonic flame spray gun and spray method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: as figure 1 , 2 , 3, 4, 5, and 6, a dual-fuel supersonic flame spray gun with an inner hole includes a gun housing 1, and the gun housing 1 is divided into three sections of front section 2, middle section 3, and rear section 4, and front section 2 is provided with kerosene Channel 5, several gas channels 6 and several oxygen channels 7, the gas channels 6 are preferably hydrogen channels. The middle section 3 is provided with a combustion chamber 8, the outlet end of the kerosene channel 5 is provided with a kerosene nozzle 9 extending into the combustion chamber 8, and the combustion chamber 8 is provided with a necking section 8.1 at the outlet of the kerosene nozzle. The gas passage 6, the oxygen passage 7 communicate with the combustion chamber 8 of the middle section 3, the outlet of the combustion chamber 8 is provided with a Laval nozzle 10, and the rear section 4 is provided with an elbow-shaped nozzle 11 communicating with the Laval nozzle 10, a...

Embodiment 2

[0043] Embodiment 2: as Figure 7 As shown, a dual-fuel supersonic flame spray gun with an inner hole includes a gun casing 1, and the gun casing 1 is divided into three sections: front section 2, middle section 3, and rear section 4. The front section 2 is provided with a gas channel 6, and the front section is provided with a mixing The gas ring 20 is provided with an oxygen passage 7 on the gas mixing ring, and is provided with annularly distributed gas through holes 22 on the gas mixing ring ′ , there is an annular gas cavity 23 between the gas mixing ring 20 and the front end 2 ′ , there is a kerosene nozzle 9 in the gas mixing ring 20, a kerosene channel 5 is arranged on the kerosene nozzle 9, and an annular oxygen chamber 21 is arranged between the gas mixing ring 20 and the kerosene nozzle 9 ′ .

[0044] The middle section 3 is provided with a combustion chamber 8, the front end of the combustion chamber 8 has a gas pre-mixing chamber 8.2, the combustion chamber 8 an...

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Abstract

The invention discloses an inner hole dual-fuel supersonic flame spray gun which comprises a gun shell. The gun shell is divided into a front section, a middle section and a rear section, a gas mixing ring and a kerosene nozzle are arranged on the front section, a combustion chamber is arranged in the middle section, a gas premixing chamber is arranged in the front of the combustion chamber, and a Laval nozzle is arranged at an outlet of the combustion chamber. The rear section is provided with a spraying opening, and the side wall of the spraying opening is provided with a connector connected with a powder feeding pipe. A high volume expansion effect generated after kerosene combustion is utilized, a high-energy enthalpy value is generated after gas combustion, and kerosene combustion can be more sufficient through the combustion chamber and the gas mixing ring, so that the content of oxygen in combustion-supporting gas can be accurately matched, the oxidation condition of powder can be effectively controlled, and the temperature and speed of the outlet of the spray gun can be adjusted more accurately.

Description

technical field [0001] The invention relates to the field of spraying equipment, in particular to an inner-hole dual-fuel supersonic flame spray gun and a spraying method. Background technique [0002] The performance requirements for the wear resistance and corrosion resistance of the inner surface of pipeline parts in the fields of aviation, aerospace, petroleum and chemical industry are increasing day by day. Therefore, the surface of the inner hole needs to be strengthened by one or more surface treatment technologies to improve the service performance and service life. . At present, the typical inner hole surface treatment methods include electroplating and chemical plating, but the coating itself has defects and original cracks. In addition, under the increasing environmental protection requirements, the electroplating process will have limitations such as being gradually banned or eliminated; other processes Including physical / chemical vapor deposition, anodization, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/129
CPCC23C4/129
Inventor 徐世霖哥兹·马特乌斯
Owner 中机凯博表面技术江苏有限公司
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