Double-sided coil pipe enamel process and double-sided porcelain enamel coil-pipe

A process method and enamel technology, applied in the field of coil surface coating, to achieve the effect of firm bonding, prolonging service life and dense enamel layer

Active Publication Date: 2009-06-10
A O SMITH CHINA WATER HEATER CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] After repeated explorations and experiments, the applicant finally found a coating method of filling the coil with enamel slurry by means of compressed air, thus solving the problem of enamel coating on the inner surface of the tortuous coil

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Double-sided coil pipe enamel process and double-sided porcelain enamel coil-pipe
  • Double-sided coil pipe enamel process and double-sided porcelain enamel coil-pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The double-sided enamel coil of this embodiment is as figure 1 As shown, the steel coil pipe body 1 is composed of a low-carbon seamless steel pipe, two reinforcing ribs welded and fixed on both sides and lifting lugs at both ends of the reinforcing ribs. The lifting lugs are used for hanging when entering the furnace for sintering, which can prevent Deformation, but also convenient for enamel coating. The low-carbon seamless steel coil has a total length of 16m. from figure 2 It can be seen from the figure that the inner and outer walls of the steel coil pipe body 1 coated with enamel have enamel layers 2 and 3 respectively. The thickness of the outer enamel layer 2 of the steel pipe is between 0.18-0.36mm; the thickness of the inner enamel layer is between 0.05-0.15mm. The above thickness can not only ensure the anti-corrosion and anti-scaling performance, but also help to ensure the quality of coating.

[0025] The entire surface coating process is:

[0026] 1)...

Embodiment 2

[0036] The basic situation of this embodiment is the same as that of Embodiment 1. The difference is that the metal substrate of the coil is thick-walled stainless steel with a total length of 8m.

[0037] Therefore, the enamel coating and sintering of the inner tube are only carried out once, and the sintering temperature is controlled at 900°C-1100°C. Experiments show that the final surface coating effect is basically the same as that of Example 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

A process for small-diameter coil pipe double-sided enamel is carried out by cleaning internal surface, grouting for inner pipe, enamel sintering for inner pipe, cleaning external surface, coating enamel onto external surface, enamel sintering for external pipe and forming coil pipes with sintered enamel coatings on internal and external surfaces. The enamel layer is compact, metal pipe substrates are firm. It has long life and excellent anti-scale function.

Description

technical field [0001] The invention relates to an enamel process method, especially a double-sided enamel process method suitable for small-diameter coils, and also relates to a double-sided enamel coil made by the method, which belongs to the technical field of coil surface coating . Background technique [0002] Enamel coating has good corrosion resistance, so it is a traditional surface coating method. According to the applicant's knowledge, although the enamel process has been very mature, for a long time, only one side of the outer surface of the coil has been coated with enamel. Because the double-sided enamel of small-diameter coils using traditional technology has always had the following unsolved technical bottlenecks: 1. It is very difficult to coat the inner wall of the tortuous coil; 2. The phenomenon of enamel scale explosion during sintering is inevitable. Therefore, so far, there has never been a small-diameter coil with double-sided enamel, and due to the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C23D5/02C23D9/00C23D13/00
Inventor 邱步万华新敖凯平
Owner A O SMITH CHINA WATER HEATER CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap