1. The equipment used in this system is suitable for clay sand process and production of cast iron castings.
Conditions of use of this system
Power supply: 3AC 380V 50HZ
Water source: 0.2mpa ~ 0.3mpa
Compressed air: 0.4Mpa to 0.6Mpa
Ambient temperature: 0 ° C to 40 ° C
Relative humidity: ≤90%
The highest sand temperature: ≤250ºC
Production program: 20t/h (clay sand cast iron production line)
2. The design principle and comprehensive technical and economic index of the scheme
The design of the scheme is based on the following principles:
According to the government, the project meets users' requirements on production program and process quality, and reaches the contemporary advanced level in China. The system configuration gives full consideration to the current situation of the enterprise and the characteristics of the market. It not only takes into account the development stage of the enterprise, but also has good market adaptability and process research and development ability.
According to the production characteristics of enterprises, factors such as production organization, equipment maintenance and waste disposal are taken into account in equipment layout, which benefits production management and equipment maintenance, as well as smooth logistics, and brings convenience to future production and maintenance.
configuration of equipment type selection, with safe, reliable, low cost, environmental protection for the principle, in ensuring that adapt to the caster production environment and production characteristics, meet the demand of process quality conditions, try to reduce the equipment capacity, improve equipment reliability, reduce the number of parts, reduce the equipment cost and raw material consumption, to improve the economic benefit.
According to system configuration, the system strives to meet the requirements of "flexible production organization", so that the normal operation of the system can be reasonably selected according to different technological requirements and different stages of production, so as to reduce production cost and facilitate production organization.
Lent meets the requirements of social progress and environmental protection. On the premise of guaranteeing process quality, production organization and economic benefits, the plan strives to put environmental protection requirements and improving the production environment in an important position, laying a foundation for improving the image of casting in terms of system configuration and layout.
Buy a way to effectively use space, allocate equipment, and reduce infrastructure costs.
(II) Sand regeneration process and main configuration description (see scheme drawing)
1. New sand is added
The new sand is lifted by the bucket elevator and stored in the new sand hopper.
2. Sand falling machine and used sand recovery system
After casting and cooling, the mold is dropped by inertial vibration sand machine and sent to sand treatment system by belt machine. Dust removal adopts fixed semi-closed cover and pulse dust collector.
3. Old sand crushing and regeneration system
The old sand after falling by the inertia vibration sand machine is transported by the belt machine to the fine hexagonal sand screen machine for sand crushing and screening, through the belt type feeder (belt type feeder is equipped with temperature humidification device, The sand is atomized and sprayed with water to humidify and cool down by measuring the temperature with an infrared probe.) The sand is evenly added to the vibrating boiling cooling bed for cooling and then lifted to the old sand library by the bucket lifting machine to complete the crushing and screening of the old sand. After crushing and screening, the sand particles are temporarily stored by the transition hopper and lifted by the bucket elevator to the next step.
4. Dust removal system
For clay sand process, good dust removal is not only environmental protection requirements, but also production technology and quality level
Therefore, more attention should be paid to the design and layout of the dust removal system.
5. Electrical control system
5.1 The electrical control system controls all the equipment from the beginning of sand falling to the end of adding sand bucket to the molding line. The whole system can be interlocked automatically, but also can be divided into units to work independently. Control set manual, automatic switch. The cabinet shell seal ADAPTS to the working environment of casting workshop. The main components are from famous domestic manufacturers, and the key components are imported high-quality components. Programmable controller adopts Mitsubishi series PLC host and input and output interface, the control program through rigorous and thorough demonstration, in line with the process, reasonable and reliable. All power cables and control cables are reinforced to ensure safe and reliable use. The touch screen is set on the electric cabinet to display the working condition of the equipment and has the function of fault self-diagnosis. It is very convenient to use and maintain. The electric control system has wide adaptability and long-term high reliability. System control is equipped with start alarm device, in the main equipment and underground road, high place nearby control button station, easy to equipment debugging and maintenance, and conducive to safety emergency stop.
Set on the touch screen sand control system: control system, according to the material and operating button, the dosage of old and new sand through electronic said to control its addition amount by than column, pulverized coal clay quantitatively through time, sand mixing machine of pulverized coal and water and old sand clay sequence through the PLC control in order to join, belt conveyor and bucket lifting the tail wheel is equipped with the testing function (such as: The design and installation of the electric control system are in full compliance with the national GB/T5226.1 standard. The main lines are equipped with corresponding distribution boxes, and the control lines are added with lines for equipment, which is convenient for improvement and maintenance.