Asphalt mixture mixing equipment, production capacity of 30-400 tons / hour, the whole machine has a high degree of automation, accurate measurement, high reliability, is the ideal equipment for the construction and maintenance of high-grade highways. Asphalt mixture mixing plant is a new type of product developed by the unit introducing international advanced technology and combining the characteristics of domestic highway. Its key components such as burners, sensors, etc. are used in the international first-line brand components; the control system adopts Siemens programmable controller and control computer, which can automatically and manually control the weighing, mixing and discharging of materials in the production process; the mixer liner and blades are made of high wear-resistant alloy castings.
The mixing arm is made of alloy cast steel, which has long service life; aggregate adopts cumulative metering method, powder and asphalt adopt separate metering method, so as to ensure the accuracy and reliability of batching; hot aggregate and mineral powder adopt bucket-type double-chain elevator, and have automatic tensioning device. The combustion system is equipped with light oil/heavy oil/coal-fired burner. Dedusting system has gravity dedusting, cyclone dedusting, water dedusting, bag type dedusting; Finished product silo has a variety of combinations of side-mounted, bottom-mounted (30, 60, 80, 100, 120, 150, 200 tons) and other forms for users to choose.
HLB5000 environmentally friendly asphalt mixing plant is a new product developed on the basis of the introduction of similar foreign products. Its key components burner, sensor, are imported equipment, control system using Siemens PLC centralized control, professional control computer, at the same time, dynamic display of the entire production process. The mixing cylinder liner, mixing arm and blade are made of special materials with long service life. Aggregate, mineral powder and asphalt all adopt advanced electronic scales to ensure the accuracy and reliability of batching, and hot aggregate and mineral powder are lifted by bucket elevator with automatic tensioning device. Combustion system has: 1) heavy oil combustion system: automatic ignition, automatic temperature control; 2) diesel combustion system: automatic ignition, automatic temperature control. The first stage of dust removal system adopts gravity dust removal.
LBY series mobile asphalt mixing plant is suitable for airport runway, wharf, roads, bridges and other on-site construction and emergency repair and construction of special pavement operations and ordinary pavement construction. The whole set of equipment has a compact structure and integrates the whole set of asphalt concrete production equipment on several trailer units; the man-machine operation interface is simple and clear, the work is stable and reliable, suitable for all kinds of harsh environments, and the design of the whole machine is in line with the requirements of environmental protection, and the mobility performance is excellent; the use of double horizontal axle mandatory mixer, the continuous working ability is strong, the mixing is even and fast, and it's especially convenient for the reconstruction and maintenance of the road surface.
I. Batching System
Modular structure, reasonable layout, easy and quick assembly and disassembly.
Three standards of ground batching hopper 5 cubic meters, 8 cubic meters and 15 cubic meters are available, and the top of each bin is equipped with isolation grille mesh to prevent the entry of oversized material diameter aggregate.
The belt feeder is equipped with shaft-mounted speed reducer motor, which has compact and simple structure, and low failure rate; a lack of material alarm device is set at the outlet.
All conveyor belts adopt ring belt without joints, which has smooth operation, low noise and long service life.
Separation screen is set at the entrance position of the feeding material conveyor, which can reject the large-size stone materials into the drying cylinder, and can effectively reduce the amount of system waste, and save all costs.
Aggregate and feed conveyor adopt shaft-mounted reducer, which has simple structure and extremely low maintenance rate.
Two, drying system
Drying drum internal structure
Scientific and reasonable design of the lifting plate so that the material is the best curtain state, good end sealing, the outer wall of the cylinder thermal insulation materials + stainless steel plate insulation layer effectively enhance the thermal efficiency of the drying cylinder;
The drying cylinder adopts a high-performance geared motor through the cardan joints coupled with the support made of high-temperature nylon (or steel wheels), and the drying cylinder is equipped with a high performance gear motor. The drying cylinder adopts high-performance gear motor to connect with the support wheel made of high temperature resistant nylon (or steel wheel) through universal joint coupling to make the drying cylinder run by friction, and the elastic expansion gasket can reduce the transmission wear on the drying cylinder, reduce the noise and prolong the service life;
Imported fuel oil burner
Selecting the high-performance burner of international famous brand, the product is made by adopting the latest international patented technology of flame control, and it can be used for burning all kinds of grades of heavy oil of any refinery in the country, The product is a fully automatic numerical control burner that can burn various grades of heavy and residual oil from any domestic oil refinery. It realizes automatic switching and separate control of light/heavy fuel oil wind-oil ratio. The advanced oil supply system makes the heavy oil and residual oil well atomized and fully combusted, and the oil saving rate is 7~15%. The flame adjustment ratio can be up to 10:1.
The LCD monitor realizes the monitoring and modification of system parameters, as well as the Chinese fault alarm information, and all the working components are controlled and executed by PLC, which is convenient and simple to operate. This burner has the following significant features with the conventional burner: advanced technology, reasonable structure, high intelligence, high safety, high cost-effective; low energy consumption, low wear and tear, low noise, low pollution.
Three, hot aggregate lifting, screening, storage, weighing system
Hot aggregate elevator
Hot aggregate elevator is a chain-type high-efficiency elevator: the casing roller chain for the supporting project is made of alloy structural steel, which is flexible and smooth, with low friction resistance, low noise, low failure rate, and long service life; at the same time, it also comes with an automatic tensioning device for the chain, and a high-performance electromagnetic brake reducer to prevent reversal of the chain. At the same time, it is equipped with chain auto-tensioning device and anti-reversing high-performance electromagnetic braking reducer motor, which ensures the safe, reliable and high-efficiency work of the hot lifting.
Vibrating screen
Equipped with high-efficiency vibrating screen: the fixing of screen mesh adopts quick pull hook device, which makes the replacement of screen mesh fast and convenient. The whole screen body is connected by anti-loosening bolts, which is good integrity, firm and durable. The vibrating screen is also installed with a motor reverse phase braking device, which can eliminate the jumping and irregular movement that occurs when the vibrating screen is about to stop but not yet stopped. The whole screen body is closed in the dust cover, and the dust cover is set with feeding port and dust removal port, which is an ideal environmentally friendly equipment.
Hot aggregate silo and continuous material level meter
The equipment is equipped with large-capacity hot material silo, which can effectively ensure the continuity of the finished material discharge; the silo is wrapped with heat preservation layer, which reduces the heat loss, saves the fuel consumption and lowers the manufacturing cost; each hot material silo is equipped with a continuous material level meter, which continuously displays the change of the material level; a thermistor thermometer is also installed on the sand and gravel crumb bin to measure the sand and gravel in the hot material silo and the material level in the sand and gravel crumb bin, which can measure the sand and gravel in the sand and gravel in the sand and gravel in the sand and gravel in the crumb bin. In order to measure the temperature of sand and gravel material in the hot material bin; each bin can realize the accurate measurement of aggregate material; the material door adopts unique structural design to prevent the occurrence of stagnation phenomenon; the hot aggregate material bin is equipped with overflow pipe and waste pipe.
The equipment is equipped with three weighing hoppers:
Sand and gravel weighing hopper
Unique design of the eccentric material door structure, so that the door opens flexibly and smoothly, eliminating the phenomenon of stagnation; the increase of the unloading channel eliminates the unfavorable impact of floating scales.
Mineral Powder Measuring Hopper
Mineral Powder Measuring Hopper: Equipped with pneumatic arch-breaking device, the material is discharged smoothly and quickly; Specialized mineral powder spreading screw conveyor makes the mineral powder enter into the mixer quickly and uniformly, which effectively ensures the quality of the finished product: The use of frequency-regulated metering screw conveyor (small pipe diameter, high rotation speed) ensures the higher precision of powder metering.
Asphalt metering hopper
Asphalt metering hopper: heat-conducting oil heating, thermal insulation, stainless steel plate, beautiful and energy-saving; unique design, so that the amount of residual asphalt to reduce the amount of asphalt, coupled with electromagnetic braking asphalt pumps, one-way valves supporting the use of the metering accuracy has been improved; asphalt injection to take the form of asphalt pump injection can be uniformly covered by the surface of the aggregate in the mixing cylinder, which helps to improve the quality of the finished product and reduce the mixing time. Material quality, reduce mixing time; electronically controlled over-weighing detection device, to eliminate the overflow scale; asphalt reduction, floating metering to ensure the accuracy of measurement on the basis of strict control of the oil-rock ratio.
Weighing Module
Weighing module for each weighing hopper is selected from the international famous brand, which is equipped with high-precision, high-sensitivity resistive strain transducer, fully sealed. It can adapt to any harsh environmental conditions without affecting the accuracy and reliability: the weighing module is a whole module structure, which can eliminate the influence of horizontal force and effectively improve the measurement accuracy of the whole scale.
Four, mixing system
Mixer
The whole machine adopts square frame structure, heavy-duty design, stable operation, safe and reliable, beautiful and generous appearance.
The liner and the head are made of high chromium white cast iron with long service life.
The material door adopts double cylinders to manipulate the flip type discharging door, which has short discharging time, good sealing effect, flexible opening and closing, and eliminates the phenomenon of stagnation.
The filling rate is not more than 60%, which can make the stone and asphalt fully mixed and shorten the mixing time.
Reliable lubrication system: the application of automatic lubrication system using 380V powerful motor, can quickly pump the lubricant to the lubrication points, and can be set up by the computer program, on time and quantitatively will be pumped to the lubrication points; manual lubrication as a standby system, can be reliably and timely completion of the lubrication of the various parts of the lubrication.
V. Thermal oil heating and asphalt supply system
The equipment adopts fully automatic horizontal thermal oil heating system (modular transportation and installation). The burner adopts imported brand. It has the function of automatic ignition and automatic monitoring of the working status, and the burner can work with large or small fire according to the temperature of the thermal oil.
Sixth, dust removal system
Gravity dust collector, dust collector dust removal effect can reach about 80%, its dust removal object is greater than 75μm above the dust, the first level of dust removal of all the dust for the fine aggregate particles are all sent to the hot aggregate elevator for reuse with a screw conveyor.
Seven, powder supply and dust recycling system
Recycled dust after dust removal is sent to the dust recycling tank by screw conveyor bucket elevator. When the recycling powder is not used, it can be discharged through the external screw conveyor, the end of the discharged mineral powder is equipped with well-designed spray dust-proof screw conveyor, which can make the mineral powder damp to avoid the dust flying.
The whole set of main building is in the negative pressure sealing state, eliminating the occurrence of the phenomenon of running, dripping and leaking, and improving the environmental performance of the whole set of equipment.
The powder tank is installed with high efficient material level indicator, the top of the tank is equipped with bag duster, two tanks are installed in the lower cone with air hammer, or pneumatic arch-breaking pads in order to prevent arching in the cone part; the top of the new powder tank and the recycling tank are equipped with over-pressure protection system, which prevents the phenomenon of overtopping. The stone powder in the new powder tank and the dust in the recycling tank can be proportionally transported to the powder weighing hopper by screw conveyor.
Eight, air control system
The air control system of this equipment is equipped with imported or domestic famous air compressor, which is safe and reliable. Adopt imported solenoid valve. The air valve system adopts integrated installation, avoiding the immersion of dust and rainwater and ensuring long-term operation.
Nine, electrical control system and central control room
The control system adopts computer control, screen display, keyboard input, equipped with Siemens S7 300 high-performance programmable controllers, PROFINET bus control technology, distributed I/O, using industrial Ethernet transmission, computer dual-screen control technology. Reliable work performance, easy to operate, intuitive display, high degree of automation, the center control room is spacious and bright, split air conditioning, suspended lighting, so that the operator, the staff comfortable, beautiful environment.