Intermediate frequency induction heating furnace for bearing steel pipe blank

Abstract

The invention relates to a bearing steel tube blank medium-frequency sensitive heating furnace which is characterized in that the sensitive heating furnace is divided into a pre-heating furnace section, a temperature rise furnace section and an even temperature furnace section which are lined in the straight line on a heating bed; a guide wheel is arranged in the spacing between the pre-heating furnace section and the temperature rise furnace section; the temperature rise furnace section is connected with the even temperature furnace section; a guide rail is arranged in the heating furnace; the tube blank has linear movement on the guide rail of the heating furnace. The medium-frequency sensitive heating furnace can strictly control the temperature rise of the heated bearing steel tube blank in all the furnace sections of the heating furnace to accord to the design heating code; different furnace sections are heated separately and the heat penetration is even, which makes sure the surface temperature difference of the tube blank core is less than 15 DEG C and the head and tail temperature difference is less than 30 DEG C, and fully meets the requirement of hot rolled through hole for the temperature of the tube blank.

Description

1. Technical field [0001] The invention relates to a heating device for a bearing steel pipe, in particular to a medium frequency induction heating furnace for a bearing steel billet. 2. Background technology [0002] At present, the traditional method of producing bearing steel pipes in my country is to use producer gas-inclined bottom furnace to heat the tube billet. The heating production process of the inclined bottom furnace is as follows: coal→earth gas→burning tube billets, heat conduction and temperature rise by convection and radiation methods→hot-rolled bearing steel pipes. The disadvantages of producer gas-inclined bottom furnace mainly include: backward production technology, serious pollution, especially the ash residue, tar residue and phenolic wastewater generated in the production process, which are difficult to completely treat and do not meet the requirements of the national environmental protection policy; calorific value Low temperature, unstable combust...

AI Technical Summary

Problems solved by technology

The disadvantages of producer gas-inclined bottom furnace mainly include: backward production technology, serious pollution, especially the ash residue, tar residue and phenolic wastewater generated in the production process, which are difficult to completely treat and do not meet the requirements of the national environmental protection policy; calorific value Low temperature, unstable combustion process, severe coking and slagging in the burner and furnace, difficult adjustment of air-fuel ratio, uneven furnace temperature, large energy consumption, low fuel utilization rate; slow heating speed, large temperature fluctuations, and difficult temperature control. Thick oxide skin; continuous manual turning is required, and the labor intensity of workers is high; it occupies a large area; the furnace needs to be preheated-energy consumption; tube blank separation and folding defects are inevitable, resulting in high scrap rate and low yield

In terms of safe operation, there are three major hazards in the producer gas-inclined bottom furnace: flammable, explosive, and toxic, and there are major safety hazards in the process of production and use

In a word, using producer gas-inclined bottom furnace to heat the bearing steel billet will inevitably lead to high temperature at both ends of the billet, and it is easy to cause local layer separation when passing through the pipe. The uneven temperature in the furnace makes the heating quality of the billet unguaranteed. , resulting in unstable quality of the produced bearing steel pipes, only low-quality bearing steel pipes can be produced, and the goal of green production cannot be achieved

Images