As we all know, EPC companies are the best engineering, procurement and construction companies offering various services in engineering, power, transmission, highway, road, transmission. So most enterprises would cooperate with the EPC companies about large-scale projects. Then the next problem also come, how to choose the suitable equipment for your project to make a big fortune. Today I want to share some information about the choosing of equipment, such as stacker reclaimer.
When determining reclaimers requirements for a new application, there are a number of things that should be taken into consideration. What kind of material will you be transferring? What size is the material? At what rate will the material be conveying? These are just a few of the questions that should be asked when choosing the right reclaimer for the industry? So after carefully thinking about some parameters, the users could make a right decision. Besides, the conveyor components have an important role in the conveying process. So strict choosing is also necessary. Take-up device is one of the conveyor components. Take-up device includes screw take-up device, gravity take-up device, jinny take-up device, automatic tensioning device. Each has its own advantages and disadvantages. They could be respectively applied in different belt conveyors. So that is all in this blog, hope to see you in next blog~
0 Comments
As we all know, the manufacturing industry has an important role in the development of a country. Then the equipment is also the same role in the manufacturing industry.
The preparation equipment in mining could be divided into crusher(cone crusher, jaw crusher, box-type crusher, impact crusher and etc.), grinding machine, screening machine, separating machine, dewatering machine and other various production lines. Then we should know some parameters, functions, and other application knowledge about these machines. The following is related. The maintenance and reconditioning of stacker reclaimer make the equipment operate without faults and have a long service life, which largely depends on regular check, better use and continuous maintenance. The apron feeder adopts high-duty bulldozer's die forging chain (pitch of 228.6mm)as traction. Two chains circles a pair of drive sprocket in machine head and tightening pulley in machine tail to form closed loop circuit. The fitting of conveyor trough in each chain unit of two chains makes the apron feeder form a continuous conveying line. The self-weight and materials weight are supported by rows of track roller, jockey pulley, track beam. The drive system operates through the connection of ac variable frequency speeding motor and reducer, connection of casing and transmission. The apron feeder conveys materials from stock bin along the conveyor line to the front of engine, which realizes the purpose of downward continuously uniform feeding. So today is done, if you like it, please be kindly free to pay attention to my blog~ Maybe some people just see the mining equipment, but they don't the features about the mining equipment. Then I will explain them respectively~
About the Belt Conveyor: Excellent scraping effect is one of the many good features. The scraper adopts TPU composite. The scraper blade has many advantages such as smooth surface, accurate straightness, low friction, high abrasion proof and high intensity, which makes it have stable scraping effect. It could effectively eliminate residual fines and sticky materials on the belt. Preloading voltage regulator ensures the stable contact pressure between scraper and belt. The surface of scraper is made up of several narrow PU scraper blades and has buffer holes, which has good follow performance for various belts. About the stacker reclaimer: The stacking and reclaiming could be realized through central control room and on-machine control room under the automatic control of stacker reclaimer. When needing central control room to control the automatic operation, operating personnel press the button of automatic operation and then start button. The electric equipment of stacker reclaimer would start according to the predetermined procedure. The overall unit operation enters into normal automatic operation. On the platform of central control room, users could start or stop the complete machine system of stacker reclaimer just through pressing button. The set of equipment adopts three operating modes: automatic control, manual control, on-site control(maintenance). Each control mode is realized through change-over switch. About the apron feeder: The apron feeder adopts high-duty bulldozer's die forging chain (pitch of 228.6mm)as traction. Two chains circles a pair of drive sprocket in machine head and tightening pulley in machine tail to form closed loop circuit. The fitting of conveyor trough in each chain unit of two chains makes the apron feeder form a continuous conveying line. The self-weight and materials weight are supported by rows of track roller, jockey pulley, track beam. The drive system operates through the connection of ac variable frequency speeding motor and reducer, connection of casing and transmission. The apron feeder conveys materials from stock bin along the conveyor line to the front of engine, which realizes the purpose of downward continuously uniform feeding. So do you have a full understanding of them? The stacking and reclaiming could be realized through central control room and on-machine control room under the automatic control of stacker reclaimer. When needing central control room to control the automatic operation, operating personnel press the button of automatic operation and then start button. The electric equipment of stacker reclaimer would start according to the predetermined procedure. The overall unit operation enters into normal automatic operation. On the platform of central control room, users could start or stop the complete machine system of stacker reclaimer just through pressing button.
Transport capacity is an important indicator of measuring the capability of screw conveyor. The transport capacity could be calculated through the following formulas: Q=47D²S.n.ψ Q——transport capacity (t/h) S——pitch,m D——diameter of screw blade (m) N——speed of spindle (γ/min) ψ——activity coefficient The friction and adhesiveness of materials, screw pitch, and center line inclination of screw conveyor influences the activity coefficient. 1. For the materials that are flowing and not wearing( such as flour, grain), ψ=0.45; 2. For the materials that are with graininess or small pieces and partly wearing(such as salt, sand), ψ=0.33; 3. For the loose and dense materials that are easily wearing and corrosive(such as slag, gravel, ore), ψ=0.15. Conveyor and feeder have many various type such as belt conveyor, screw conveyor, apron feeder. Then comes detailed information about screw conveyor and apron feeder.
First to say is the aspect of conveyor. Transport capacity is an important indicator of measuring the capability of screw conveyor. The transport capacity could be calculated through the following formulas: Q=47D²S.n.ψ Q——transport capacity (t/h) S——pitch,m D——diameter of screw blade (m) N——speed of spindle (γ/min) Take-up device is one of the conveyor components. Take-up device includes screw take-up device, gravity take-up device, jinny take-up device, automatic tensioning device. Each has its own advantages and disadvantages. They could be respectively applied in different belt conveyors. Second to say is the principle of apron feeder The apron feeder adopts high-duty bulldozer's die forging chain (pitch of 228.6mm)as traction. Two chains circles a pair of drive sprocket in machine head and tightening pulley in machine tail to form closed loop circuit. The fitting of conveyor trough in each chain unit of two chains makes the apron feeder form a continuous conveying line. The self-weight and materials weight are supported by rows of track roller, jockey pulley, track beam. The drive system operates through the connection of ac variable frequency speeding motor and reducer, connection of casing and transmission. The apron feeder conveys materials from stock bin along the conveyor line to the front of engine, which realizes the purpose of downward continuously uniform feeding. That is all in this blog, I will renew my blog regularly~ Hope you could kindly read my articles. In the end, hope everyone have a good day! EPC means engineering, procurement and construction. EPC companies show the contract model. In other words, EPC is a kind of contract model not an enterprise. Basically, designing institutes carry out EPC contract in the domestic. Sometimes construction units do EPC contract.
The long-distance belt conveyer design has features of long distance delivery, large-capacity, high speed, and continuous conveying. Besides, reliable operating, simple maintenance, easy realization of automatic and centralized control, and remarkable economical benefit are the advantages of the long-distance belt conveyer. mining equipment. The operation and maintenance cost of belt conveyor is far below other types of transporting equipment. The energy consumption is low, only the 1/2-1/3 of scraper conveyer. So the long-distance belt conveyor has become the most popular equipment in the industrial processes. The apron feeder adopts high-duty bulldozer's die forging chain (pitch of 228.6mm)as traction. Two chains circles a pair of drive sprocket in machine head and tightening pulley in machine tail to form closed loop circuit. The fitting of conveyor trough in each chain unit of two chains makes the apron feeder form a continuous conveying line. The self-weight and materials weight are supported by rows of track roller, jockey pulley, track beam. The drive system operates through the connection of ac variable frequency speeding motor and reducer, connection of casing and transmission. The apron feeder conveys materials from stock bin along the conveyor line to the front of engine, which realizes the purpose of downward continuously uniform feeding. 辑. EPC Companies means that the company is entrusted by owner to undertake the design, procurement, construction, commissioning and other processes in accordance with the contract. This kind of undertaking could be in whole course or just several stages. Generally speaking, the company is responsible for the quality, security, expenses and progress of contracted projects under lump sum contract.
In the EPC pattern, engineering not only includes concrete design, but also general plan of overall construction projects, scheme of organization management and other specific work. Procurement is not material purchase of construction equipment in the general meaning. It mainly means the procurement for professional equipment and materials. Construction consists of constructing, installing, commissioning, technical training and etc. The stacker reclaimer boom belt conveyor design could operate in two directions and start with load. Drum is one of boom conveyor components. After being installed and welded, the drums should be through the stress relief and anneal handling. The post-assembly drums need to carry on static balance test. The surface of transmission drum is cast with 12mm rubber layer and diamond grooves, which enlarge the friction coefficient between transmission drum and belt. Roller adopts ratio-frequency welded tube with high accuracy as roller skin. The bearing house is made up of steel plate. The bearing house has many advantages such as light weight, certain elastic deformation which could eliminate bending stress. The bearing with ample clearance could make roller carrier shaft reduce friction resistance in the normal deflection. The cavity of the bearing adopts long-lasting lithium grease, being equipped with inside sealing, labyrinth seal, shaft-end seal.辑. The transport capacity of pipe conveyor is usually same with general belt conveyor whose belt width is 2.5-3 times longer than pipe diameter. The transport capacity of pipe conveyor with 300mm(12in) in pipe diameter is same with general belt conveyor with 800mm(30in) in belt width, 20 degrees in trough angle of idler and 20 degrees in discharging angle. The pipe conveyor's minimum scaffold width is 1050mm(41in), while the general belt conveyor's minimum scaffold width is 1050mm(41in). Under the conditions of installation spatial limitation(for example, in tunnel), users could design smaller tunnel cross section if adopting pipe conveyor.
Reclaimer is one of the mining equipment. The design, manufacturing, installation and acceptance accord with and even precede other related Chinese standard and criterion.
GB3811—83 Design Rules for Cranes GB/T14695—93 Type Parameters of Boom Bucket Wheel Stacker Reclaimer JB/T4149—94 Technical Specifications of Bucket Wheel Stacker Reclaimer JB/T7326—94 Safety Specifications of Bucket Wheel Stacker Reclaimer JB/T7328—94 Approval Technology Standards of Bucket Wheel Stacker Reclaimer JB/T7329—94 Technical Terms of Bucket Wheel Stacker Reclaimer JB/ZQ8016—88 Quality Rating of Bucket Wheel Stacker Reclaimer ZBJ81001—87 Mechanical Structure Design Specifications of Continuously Mobile Handling DLGJ1—93 Technical Regulations Of Coal Handling Design In Thermal Power Plant SDG17—88 Technical Regulation of Service Power Design In Thermal Power Plant JCAAR11A—1984 Aseismic Design Guide of Crane GB8923—88 Steel Surface's Rusting Grade and Derusting Grade before Painting GB10595—89 The Technical Conditions of Belt Conveyor JB/ZQ8008—88 Quality Rating of Belt Conveyor Products GB987~988—91 Basic Parameters and Dimensions of Belt Conveyor GB4490—84 The Size of Conveyor Belt GB7984—87 The Textile Conveyer Belt for General Use GB10822—89 Flame Resistant Conveyer Belt for General Use GBJ17—88 Design Code for the Steel Structures GBJ55—83 Electrical Installation Design Specifications of Industrial and Civil General Screw conveyor finish the process of conveying materials through the following course: When materials added into fixed closed trough, the materials accumulating at the bottom of closed trough move forward under the push of rotary helical blade and don't rotate with rotary device because of materials gravity and force of friction between materials and closed trough. This course is just like the process that non-rotating nut does translational movement along rotating screw. Belt conveyor is a kind of machine that could transport materials continuously with friction drive. Belt conveyor mainly consists of frame, conveyor belt, roller, drum, tensioning device and transmission. Belt conveyor could finish the process that materials are conveyed from initial feeding point to final emptying point in certain transportation line. Belt conveyor could transport not only bulk materials, but also packed freight. Besides the pure material handling, belt conveyor also coordinates various industrial enterprises' requirements of manufacturing process and eventually forms orderly production line of conveyer system.
There are many protective devices for keeping the equipment operating normally in the course of reclaimer operation. An ordinary reclaimer should have following devices: material level limit, pitching and rotating limit, walking encoder and buffer stopper, sound-light alarming device, scramming device, ultrasonic anti-crash device, overheat protection system of motor reducing gear, under speed and tearing warning device of arm belt, PLC interlocking device and other protection devices. Tractive effort the belt conveyor design needs is transferred through rubbing action between driving pulley of driving device and conveyor belt. So the friction drive forms. To ensure the transmitting of acting force and traction components' no slipping on the driving wheel, the following conditions must be met. (1) The traction components should have enough tension. (2) There should be certain roughness on the contact surface of traction belt and driving pulley. (3) Traction belt should have an enough surrounding angle on the driving wheel. 进行编辑. |