Automatic steam curing device and method for cement linings of nodular cast iron pipes

Abstract

The invention discloses an automatic steam curing device and method for cement linings of nodular cast iron pipes, and belongs to the technical field of cast iron pipe production. The automatic steam curing device for the cement linings of the nodular cast iron pipes comprises a curing furnace, a control cabinet and an operation box provided with a human-computer interface. A pressure sensor and an electric control valve are sequentially arranged on a steam pipeline in the steam conveying direction, wherein the steam pipeline is used for conveying steam into the curing furnace. A temperature sensor and a humidity sensor are arranged in the curing furnace. The control cabinet comprises an analog quantity output module, an analog quantity input module, a CPU module and a power module. The steam curing method for the cement linings of the nodular cast iron pipes comprises the steps of natural curing, a low-temperature rise stage, a low-temperature preservation stage, a high-temperature rise stage, a high-temperature preservation stage and a temperature-fall stage. According to the automatic steam curing device and method for the cement linings of the nodular cast iron pipes, steam curing parameters are accurately controlled, the curing quality of steam curing for the cement linings of the nodular cast iron pipes is improved, the full-automatic operation of the steam curing for the cement linings of the nodular cast iron pipes is achieved, and the labor intensity of staff is relieved.

Description

technical field [0001] The invention relates to the technical field of production of ductile iron pipes, in particular to a cement-lined automatic steam curing device and method. Background technique [0002] In the production process of ductile iron pipe production enterprises, in order to prevent rust and other harmful substances from polluting water quality and increase the corrosion resistance of cast iron pipes, the process of lining cement for ductile iron pipes is essential. The lining cement operation is Coat the inner surface of the ductile iron pipe with a thin layer of cement mortar. After the cement lining operation is completed, in order to ensure that the cement lining of the lined pipe can dry and dry quickly, it is necessary to quickly hoist the lined pipe into the curing In the furnace, this type of pipe is lined with health treatment, and each production plant has multiple health furnaces on its production line for production turnover. [0003] When the li...

AI Technical Summary

Problems solved by technology

Traditional nodular cast iron pipe cement lining curing process adopts steam curing. The start and stop, size and time of steam are completely controlled by manually adjusting the opening of the valve. This manual control method has the following problems: 1. The length of curing time is not accurately controlled , affecting the output and quality; 2. Poor control of the opening of the health care steam valve, resulting in a large temperature deviation in the health care furnace and an increase in waste products; 3. The steam pressure is unstable, and temperature fluctuations in the health care furnace lead to an increase in waste products; 4. Control of the health care process curve Not strict; 5. The furnace cover of the health care furnace is fixed and needs to be lifted by a crane

Images