Drum Screen

Overview of GS cylinder rotary screen (cylinder screen):The main structure of GS cylinder rotary screen is the screening cylinder, which is composed of several circular screens. The screen is incthe ground plane as a whole, and the outside is sealed by a sealed isolation cover to prevent environmental pollution. The screening cylinder rotates at a certain speed through the variable speed deceleration system, the materials are separated from top to bottom through the screening cylinder, the fine materials are discharged from the lower part of the front end of the screening cylinder, and the coarse materials are discharged from the lower end of the screening cylinder. The cylinder rotary screen can be equipped with a comb type cleaning mechanism. In the screening process, the relative movement of the comb type cleaning mechanism and the screening cylinder can achieve the effect of continuous cleaning of the screen body, so that the screening cylinder is always clean, non stick, non blocking and does not affect the screening effect in the whole working process.According to different classification requirements, GS cylinder rotary screen generally has 1-4 sections from fine to coarse, and materials are screened from the first section to the last section from fine to coarse, and materials larger than the last section are discharged from the outlet.GS cylinder rotary screen in the use process, the operation is slow and uniform, the impact vibration is very small, the work is stable, its installation is simple, sometimes even does not need special foundation. It can be directly placed on the flat ground or floor and under the silo. The machine is easy to close and collect dust, with small amount of maintenance, simple maintenance and long service life. It is often used in refractory material, coal, river sand grading and sand stone grading.Performance characteristics of GS cylinder rotary screen:1. Wide adaptability of materials: rotary screen is widely used for screening of all kinds of materials. No matter it is inferior coal, slime, soot and other materials, they are screened smoothly.2. Simple and diverse feeding modes: the feeding port of rotary screen developed by our company can be designed according to the actual situation on site. No matter it is belt, funnel or other feeding modes, it can be smoothly fed without taking special measures.3. High screening efficiency: the equipment can be equipped with a comb type cleaning mechanism. In the screening process, no matter how dirty and misneous the materials entering the screening cylinder can be screened, thus improving the screening efficiency of the equipment.4. Large screen weight, easy to be large-scaleUnder the same size, the area of the circle is larger than that of other forms, so the effective area of screening is larger, so that the material can fully the screen, so the screening component is larger in unit time. Because of its simple structure, convenient layout, novel and mature technology, it is easy to be large-scale.5. Low energy consumptionThe power of the rotary screen motor developed by our company is small, which is one-half to one-third of the other screen types. It can handle the same amount of materials and the operation time is only one-half of the other screen types, so the energy consumption is low.6. Good working environmentThe whole screening cylinder can be sealed by a sealed isolation cover, which completely eliminates the dust flying, block splashing and other nomena during the screening cycle, and avoids the pollution to the working environment.7. Low equipment noiseIn the operation of the rotary screen, because of the small rotary speed and the sealed isolation cover, the noise can not be transmitted to the outside, so as to reduce the noise of the equipment.8. Long service life and small maintenanceThe rotary screen is composed of several ring-shaped screens, whose total screening area is far larger than that of other screen types. In addition, the screening efficiency is high, and the running time of the equipment is short, so the service life is long, the of vulnerable parts is small, and the maintenance amount is small.9. Convenient maintenanceThe upper cover of the equipment seal isolation can be disassembled, which will not affect the normal operation of the machine after disassembly, and make the maintenance very convenient.Main technical parameters of GS cylinder rotary screen:Rotary drum screenNote: 1. The external dimension is calculated according to the longest cylinder;2. The processing capacity is calculated according to the maximum aperture;3. The inclination angle and the length of each section are different depending on the material;4. The mass shall be calculated according to the longest cylinder and the use of woven mesh;5. The proportion of the largest material block shall not exceed 10%.

Applicable scope of roller screen:Roller screen is suitable for screening all kinds of materials, coal, coke, lime and other wet and easy to block materials, stone yard and other industries, so it is also called mining roller screen. The products under the screen are less than 100 mm at most, 10-50 mm in the middle and less than or equal to 3 mm at most.1. Classification of large and small stones and separation of soil and stone powder in the quarry;2. Separation of sand and stone used in sand and stone field;3. The coal industry is used for the separation of lump coal and pulverized coal and coal washing (a part of coal washing machinery);4. The chemical industry and mineral processing industry are used for the classification of large and small blocks and the separation of powdery materials.Performance comparison of various sieve types:Screen type project cage roller screen plane vibrating screen cantilever vibrating screenCoal type adaptability to all kinds of coal clocks only suitable for certain moisture and impurity free coal clocks only suitable for certain moisture and impurity free coal clocksThe coal feeding mode is flexible and diverse. It can be designed according to the actual situation to only adapt to the belt and funnel. The size of the coal inlet is fixed to only adapt to the belt and funnel, and the size of the coal inlet is fixed.Rotary vibration of screening modeThe screening efficiency is as high as over 95%, 10% – 70%, depending on the moisture content of coal, 10% – 80%, depending on the moisture content of coal.Sieve content reaches 100% MCR, unlimited (10% – 80%) MCR, depending on the moisture content of coal (10% – 80%) MCR, depending on the moisture content of coalThe blanking particle size is 6-30mm, which can be adjusted at will. Because the screen is fixed, the blanking particle size can not be adjusted at will, and the blanking particle size guarantee degree is not good, and the blanking particle size exceeds the standard.The large-scale design is flexible, the size limit is smaller than other sieve types, and it is easy to be large-scale. The large-scale is limited by size, screening efficiency and cantilever materials.Energy consumption is small, which is 50% of that of other sieve types.Noise with sealed isolation cover, low noise, high noiseShort equipment lifeIs the cleaning mechanism available?Good working environment (with sealed isolation hood, no pulverized coal dust and coal block splashing) poor (without sealed isolation hood, with pulverized coal dust and coal block splashing) poor (without sealed isolation hood, with pulverized coal dust and coal block splashing)Low labor intensity (no need to clean coal and floor area regularly) large (long equipment operation time, regular cleaning and floor area coal) large (long equipment operation time, regular cleaning and floor area coal)The amount of maintenance and vulnerable parts is small, and the vulnerable parts only need to replace the bearings. The maintenance amount is large, and there are many vulnerable parts. Screen and vibration motor need to be replaced and repaired in a short period of time, and there are many vulnerable parts. Screen bar and vibrating motor shall be replaced in a short time.100% of the guaranteed value of coal on the boiler cannot be fully guaranteed.equipment installation1. Embedded steel plate. Before installation, the steel plate shall be embedded according to the requirements of the equipment installation drawing, and the upper plane of the embedded steel plate shall be on the same plane. The embedded steel plates and foot bolts required for installation shall be provided by the installation unit.2. Installation of screen body. The installation position of the screen body shall be determined according to the position arrangement of the feed inlet and discharge outlet of the equipment.2. Install the foundation support. The two ends of the screen body are installed on the foundation support by hoisting, and the installation angle of the screen body is adjusted to the design angle, and finally fixed welding is carried out.3. Connect the inlet and outlet.4. Connect the sealing plate of the lower bracket of the screen body.5. Rotate the drum screening cylinder by hand, and there shall be no excessive resistance or jamming. Otherwise, the reason shall be found out and adjusted in time.6. After the roller screen leaves the factory, if it is installed after more than 6 months, the bearing of the large shaft must be removed and cleaned before installation, and a new grease (2 lithium base grease) must be injected.

debuggingI) preparation before commissioning1. After all parts of the roller screen are installed and inspected to be qualified, test run can be carried out. Before the test run, the components shall be checked in detail to see whether they are installed correctly as shown in the drawings, whether the fasteners are firm, and whether there are obstacles around the screen body that hinder the operation of the roller screen.2. Put the rectangular access door in the open position, and rotate the screening cylinder through the manual barring, observe whether the comb type cleaning mechanism is jammed or abraded, if any, adjust it by adjusting the bolt;3. Check that all bearing pedestals and gearboxes are well lubricated and the oil level of gearboxes is proper;4. The power connector shall be firm and reliable, with good insulation and correct grounding.II) no load test run1. Jog the motor control button, and check that the rotation direction of the motor should be the same as that shown on the cage roller screen;2. Start the equipment for 4-6 hours and observe the operation of the roller screen. If any abnormal sound or other nomenon is found, stop the machine for inspection in time, find out the cause and eliminate the fault.The following items shall be checked during 4-6 hours of test run:A. the maximum temperature of large shaft bearing shall not exceed 75 ℃, and the temperature rise shall not exceed 45 ℃.B. tighten all fastening bolts in time in case of looseness.3. Check the temperature rise of motor and rotating parts, which should be within the normal range.III) feeding1. When the screening machine is in stable operation, start up the feeding and discharging equipment and carry out feeding and commissioning;2. Close the seal isolation cover after normal discharging (in normal operation, the seal isolation cover shall always be in the closed position);3. Check the discharge particle size and whether there is leakage and dust;4. Operate for half an hour, check all parts carefully, and deal with problems in time.5. During the working process, the operation condition shall be checked frequently. In case of abnormal operation or abnormal sound, the machine shall be shut down in time to find out the cause and eliminate the fault.Operation and maintenanceThe operation of the cage roller screen is reliable and the maintenance is small. Here are some problems that should be paid attention to in the operation:1. When the machine is started, the cage roller screen must be opened first, and then the feeding equipment must be opened; when the machine is stopped, the reverse is true.2. Three days before operation, the fasteners of cage roller screen shall be inspected every day, and they shall be fastened in time in case of looseness. In the future, the cage roller screen fasteners can be inspected and treated regularly (weekly or half a month);3. Check the lubrication condition of bearing pedestal and gearbox regularly, and add oil and change oil in time. No. 2 lithium base grease is used for large shaft bearing. Normally, grease should be added every two months, and the filling amount should not be too much, otherwise it is easy to cause bearing overheating. Each bearing shall be cleaned and inspected once a year.4. When the equipment is stopped for a long time (for more than 30 days) and restarted, the insulation of the motor shall be telemetered to avoid the motor burning.