The project of "Development of Automatic Liquid Adding Device and Supporting Facilities for Daily Lead and Cadmium Dissolution and Immersion Chambers" utilizes human-machine interface visual operation and automatic volume quantification, automatic three-dimensional positioning, automatic temperature control, real-time pH value sensing, and automatic liquid level Intelligent means such as detection have realized the precise acid allocation, automatic positioning and constant volume addition of liquid, automatic positioning and constant volume addition of liquid, lead and cadmium dissolution of daily-use ceramics, automatic neutralization and automatic discharge of waste acid liquid, automatic temperature control, automatic acid mist discharge, etc. The function improves the detection efficiency and accuracy, reduces the labor intensity, and reaches the international leading level in the field of ceramic detection.
On March 7, the "Automatic Liquid Adding Equipment for Daily Use of Lead and Cadmium Dissolution Immersion Cabinet" developed by the Shandong Zibo Inspection and Quarantine Bureau won the invention patent certificate issued by the State Intellectual Property Office. This is the first time since the establishment of the Bureau of Zibo Bureau National Invention Patent. Just over two months ago, on December 20, 2011, this subject also won the "2011 Third Prize of the General Administration of Quality Supervision, Inspection and Quarantine", becoming the third General Administration of Science and Technology Award . Zibo Inspection and Quarantine Bureau has stepped up a new level of scientific and technological inspection work.
With the successful development of this technology, the practice of immersion and addition of daily lead and cadmium in ceramics for daily use has been expected to become history by manual configuration.
Traditional detection methods are insufficient
Zibo is a famous porcelain capital in northern China. Daily-use ceramics are one of Zibo's bulk export commodities, mainly exported to Europe, America and other markets. The amount of lead and cadmium dissolved is an important safety and health indicator for daily-use ceramic products. Developed countries such as Europe and the United States have set strict limits on the amount of lead and cadmium dissolved in daily-use ceramics.
The pretreatment of daily ceramic samples-acetic acid immersion is an important step in the experiment of lead and cadmium dissolution. This link has strict requirements on the ambient temperature, the concentration of the acid used for immersion, and light protection. The most commonly used soaking room in China is the cabinet-type soaking room, which is manually responsible for the configuration and addition of acetic acid solution. There are many deficiencies such as large area, poor labor protection, low degree of automation, low labor efficiency, and difficulty in ensuring accuracy.
In recent years, as the export of daily-use ceramic products continues to grow and the inspection and quarantine institutions have increased the density of product spot checks and inspection and testing efforts, the workload of ceramic laboratory testing has greatly increased. Improving the degree of automation of testing and accelerating the speed of product inspection, testing and release has become a top priority.
Therefore, according to the product type and volume of the product, a device capable of automatically adding a standard concentration of acetic acid for soaking to a plurality of samples automatically and eliminating harmful substances such as volatile components of acetic acid in time can effectively protect the safety of laboratory personnel and improve The accuracy of the test results, improving work efficiency, and accelerating the speed of product testing and inspection are extremely important.
Take the road that others have not traveled
The Zibo Bureau Ceramics Laboratory analyzed the return survey results of the national daily ceramic lead and cadmium dissolution capacity verification undertaken in 2007, and found that the inspection and quarantine departments of several major ceramic production areas in the country have improved the overall Research on the degree of automation of the soaking room and the protection of workers has not yet begun. Most domestic soaking chambers still use the traditional manual / semi-automatic dosing method. Full-automatic dosing devices that set different dosing amounts according to different ceramic shapes have not been researched and developed. After searching for new information from authoritative departments, there is no research in this field abroad.
As a state-level key laboratory for ceramic testing, it is also the fourth laboratory in the country and the first laboratory in Shandong Province to be recognized by a proficiency testing provider. Leaders of the Zibo Bureau and related personnel of the ceramic laboratory feel that they have a responsibility and an obligation to improve Use ceramic lead and cadmium dissolution to detect the degree of automation of pre-treatment to carry out innovative research, bravely take the road that others have not traveled. Based on their grasp of the situation and on the basis of full discussion, they organized and submitted the subject of "Research and Development of Automatic Liquid Adding Equipment and Supporting Facilities for Daily Use of Lead and Cadmium Dissolution Soak Chambers", which was recommended by the Shandong Inspection and Quarantine Bureau to the AQSIQ Project. In March 2009, after the project was approved by the General Administration of Quality Supervision, Inspection and Quarantine, the bureau immediately established a research team with the deputy director Wang Kegang as the team leader. Through extensive data research, the relevant test method standards were collected, combined with the detection practice, and serious Arrange and analyze, formulate the research idea and plan of the subject.
The subject uses the world's most advanced control system-the PLC produced by the German Siemens company as the main control system to achieve data collection and analysis control; the most intuitive and user-friendly man-machine interface-touch screen is used as the operation interface; In order to reduce the control error, the most advanced actuators-stepper motor and dovetail track are used to achieve precise positioning of the action; the most advanced, fully sealed, leak-free, corrosion-resistant magnetic metering drive pump is used to achieve accurate metering.
Automated devices increase speed and increase efficiency
After more than a year of hard work, Zibo Inspection and Quarantine Bureau successfully developed the "automatic liquid addition device and supporting facilities for daily-use ceramic lead and cadmium dissolution and soaking room".
The equipment is mainly composed of an anti-acetic acid corrosion device, an automatic setting device for adding acetic acid volume, an automatic positioning device, and a laboratory device for timely removal of acetic acid volatile substances. The research team designed a mixed liquid device capable of preparing 4% standard concentration of acetic acid through repeated experiments on the performance of acetic acid. The operator can extract the deionized water and acetic acid according to the preset ratio from the man-machine control interface. After stirring evenly in the liquid distribution tank, the configured acetic acid solution is automatically input into the storage tank. Acetic acid enters the controllable flow rate adding gun from the liquid storage tank through the acid liquid delivery pipeline, and then is controlled by the automatic positioning device to realize the automatic addition of acid liquid at each position.
After testing and inspection, the system can realize automatic dilution and automatic metering of acid, and can achieve multi-point control of liquid addition and accurate metering at different positions, which meets the expected design requirements, realizes the automatic operation of the equipment, and greatly improves the detection. Efficiency, reduced labor intensity and improved working environment. At present, the equipment has been used in the test of lead and cadmium dissolution of the National Key Laboratory of Ceramic Inspection of Zibo Inspection and Quarantine Bureau, and the effect is good.
The pretreatment equipment for the detection of lead and cadmium dissolution of ceramics won the national invention patent
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