Equipment and technology for sintering enamel coating on surface of steel pipe

Abstract

The invention discloses equipment and technology for sintering an enamel coating on a surface of a steel pipe. The equipment comprises a supporting frame for supporting the steel pipe and a first rail which is arranged to be parallel to the supporting frame, wherein a first moving frame capable of moving in the first rail is arranged in the first rail, the first moving frame supports electromagnetic frequency induction heating equipment, and the heating equipment is connected with an induction heating coil. Since the frequency induction heating mode is adopted to directly heat workpieces to be enameled, a hearth and furnace walls of a traditional enameling furnace do not need to be heated, the energy utilization rate is improved greatly, and through calculation, compared with the original traditional enameling kiln, the energy is saved by 60%.

Description

technical field [0001] The invention relates to equipment and a process for sintering an enamel coating on the surface of a steel pipe, and belongs to the technical field of enamel processing. Background technique [0002] Enamel is a metal coated with one or more layers of inorganic vitreous materials on its surface. After high temperature, the surface coating is melted, so that complex physical and chemical changes occur, and the metal and its surface coating are firmly combined to form a kind of enamel. Composite material, which has both the mechanical strength and easy processing characteristics of metal materials and the corrosion resistance, wear resistance, heat resistance, non-toxicity and rich decorative effects of inorganic glass materials. The application of enamel is very wide, ranging from daily necessities such as washbasins, cups to bathtubs, cabinets, chemical reaction tanks, oil pipelines, etc. used in industrial production, and social life such as bionic po...

AI Technical Summary

Problems solved by technology

However, the enamelled steel pipes used in MGGH are very long, exceeding 3 meters and reaching more than ten meters long. It becomes difficult to enamel the surface of such steel pipes, because the height of workpieces that can be fired in general enameling furnace design generally does not exceed 2 If the furnace is too high, the temperature difference in the vertical direction will increase, which is not conducive to the firing of enamel. However, if the elongated workpiece to be enamelled is similar to a steel pipe, if it is hung vertically during firing, it will be deformed ( (mainly deformation and warping) will not have any effect, but once the workpiece with the shape of the steel pipe is hung horizontally for firing, the steel pipe will be severely warped, and qualified steel pipe enamel products cannot be produced. After the steel pipe length exceeds 3 meters, use If the traditional enamel furnace is used to fire enamel, it can only be hung horizontally, and the firing temperature is as high as 860°C, so the deformation of the steel pipe during firing is uncontrollable

Although there are now specially designed well-type furnaces for firing special workpieces similar to steel pipes, the height of the traditional box-type furnace is increased to meet the requirements of vertical hanging of steel pipes, but the temperature difference in the vertical direction control remains a problem

Images