The development of screw conveyor is divided into two types: axial screw conveyor and shaftless screw conveyor [1]. The axial screw conveyor is composed of screw, U-shaped chute, cover plate, inlet and outlet and driving device. Generally, there are three types: horizontal type, inclined type and vertical type; The shaftless screw conveyor is changed from screw to shaftless screw, and a replaceable lining body is installed in the U-shaped groove. The structure is simple. The materials are input from the feed port and output from the discharge port after being pushed by the screw. The whole transmission process can be carried out in a sealed groove. Generally speaking, the screw conveyor we usually refer to refers to the screw conveyor with shaft type.
organization structure
Shaftless screw conveyor is mainly composed of driving device, head assembly, casing, shaftless screw body, groove lining plate, feed inlet, discharge outlet, machine cover (when required), base, etc.
Driving device: cycloidal pin gear reducer or shaft mounted hard tooth gear reducer shall be adopted. In the design, the driving device shall be set at the end of the discharge port as far as possible to make the spiral body in the tension state during operation.
The head is equipped with thrust bearing, which can bear the axial force generated when conveying materials.
Casing: the casing is U-shaped or O-shaped, with a rain proof cover on the upper part, which is made of stainless steel, carbon steel or FRP.
Shaftless spiral body: made of stainless steel or carbon steel.
Tank lining plate: the material is wear-resistant plastic plate, rubber plate or cast stone plate.
Inlet and outlet: there are two types: square and circular. Generally, the form of inlet and outlet is determined by the user.
Scope of application
Screw conveyor has the advantages of simple structure, low manufacturing cost, strong sealing, safe and convenient operation, and can be loaded and unloaded at multiple points in the middle It is widely used in chemical industry, building materials, metallurgy, grain and other departments < Under the condition of 20 , transport powdery, granular and small pieces of materials with low viscosity, not easy to deteriorate and caking
Belt conveyor
Belt conveyors have various structural forms, including grooved belt conveyor, flat belt conveyor, climbing belt conveyor, side inclined belt conveyor, turning belt conveyor and so on. The commonly used belt conveyors can be divided into: ordinary canvas core belt conveyor, steel rope core high-strength belt conveyor, full explosion-proof downward belt conveyor, flame-retardant belt conveyor, double speed double transport belt conveyor, reversible mobile belt conveyor, cold resistant belt conveyor, etc. The belt conveyor is mainly composed of frame, conveyor belt, belt roller, tensioning device, transmission device, etc.
Belt conveyor classification
Belt conveyors include: plate chain conveyor, double speed chain conveyor, roller conveyor, plug-in line, shelf line, drying line and belt conveyor.
The power roller table is composed of power roller barrel assembly, aluminum side plate, sheet frame, pull rod, bearing seat, driving device and chain. The unpowered roller table is composed of unpowered roller barrel assembly, aluminum side plate, sheet frame, pull rod and bearing seat. The power roller table drives the traction chain by the driving device, and the chain drives the sprocket on each power roller barrel to rotate, so as to work by the rotating conveyor. The unpowered roller table is pushed and pulled by people or the workpiece squeezes the workpiece and moves on the free roller.
Bucket elevator is suitable for lifting from low to high. After the supplied materials are put into the hopper through the vibrating table, the machine will automatically operate continuously and transport upward. The conveying speed can be adjusted according to the conveying capacity, and the lifting height can be selected as needed. The hopper is designed and manufactured by ourselves. PP non-toxic hopper makes this bucket elevator more widely used. All dimensions are designed and manufactured according to the actual needs. It is designed for supporting vertical packaging machine and computer metering machine. It is suitable for the lifting and feeding of food, medicine, chemical industrial products, screws, nuts and other products, The automatic stop and start of the machine can be controlled through the signal recognition of the packaging machine.
Ultrasonic vibrating screen is to convert 220V, 50Hz or 110V, 60Hz electric energy into 38kHz high-frequency electric energy, input ultrasonic transducer and turn it into 38kHz mechanical vibration, so as to achieve the purpose of efficient screening and screen cleaning. On the basis of the traditional vibrating screen, the system introduces a low amplitude and high-frequency ultrasonic vibration wave (mechanical wave) into the screen and superimposes a high-frequency and low amplitude ultrasonic vibrator on the screen. The ultra-fine powder receives huge ultrasonic acceleration to keep the materials on the screen suspended all the time, so as to inhibit the factors of adhesion, friction, leveling and blocking the screen. It solves the screening problems of strong adsorption, easy agglomeration, high static electricity, high precision, high density and light specific gravity, so that the screening of ultra-fine powder is no longer difficult. It is especially suitable for users of high-quality and fine powder
Vibrating hopper is a new type of feeding equipment, which is installed at the lower part of various silos. It can activate the materials through vibration, which can effectively eliminate the arching, blocking and sticking of materials, and solve the problem of difficult discharge of silos.
Application
Vibrating hoppers are widely used in chemical industry, building materials, metallurgy, machinery manufacturing, grain and food processing, feed processing, environmental protection, ceramics and other industries.
principle
vibratory feederÃ?Â
A hopper for automatic directional feeding by using a vibrating directional mechanism. Vibrating hoppers are commonly used in loading and unloading devices of machine tools, and are widely used in industries such as instruments and electronic components. The vibrating hopper works stably and is suitable for all kinds of small workpieces that have been partially finished. The vibrating hopper has certain universality. When it is used for different workpieces with similar size and weight, it only needs to replace the orientation mechanism (see the loading and unloading device of machine tool).
Working principle dehydration screen structure composition
The dewatering screen adopts double electrode self synchronization technology, universal eccentric block and adjustable amplitude vibrator. It is mainly composed of screen box, vibration exciter, support system and motor. Two unconnected vibrators are respectively driven by the belt coupling for synchronous reverse operation. The components of the centrifugal force generated by the two groups of eccentric masses along the vibration direction are superimposed and offset by reverse centrifugation, so as to form a single excited vibration along the vibration direction and make the screen box move back and forth in a straight line.
Performance advantage
1. The vibrating motor of the dewatering screen [1] is easy to replace. The rubber spring on the base is used to absorb vibration, so that it can be removed cleanly with small amplitude and slow vibration.
2. It can be customized according to the output and water content. The side plate of the fuselage is provided with a reinforcing plate, the bottom is provided with a support, the bottom is provided with a horizontal bar, and the discharge port is provided with a triangular steel plate support. The plate is thick,
Circular vibrating screen is a new type of vibrating screen with circular vibration, multi-layer number and high efficiency. The circular vibrating screen adopts cylindrical eccentric shaft exciter and eccentric block to adjust the amplitude. The material screen has long flow line and many screening specifications. It has the characteristics of reliable structure, strong exciting force, high screening efficiency, low vibration noise, durability, convenient maintenance and safe use. The vibrating screen is widely used in the product classification of mining, building materials, transportation, energy, chemical industry and other industries.
Sports introduction
Vibrating screen is divided into resonance screen and inertia vibrating screen according to whether the vibration frequency is close to or far away from the resonance frequency. Resonance screen once rose, received universal attention and developed rapidly; However, in production practice, the disadvantages of complex structure, difficult adjustment and many faults are exposed. The inertial vibrating screen is widely used because of its simple structure, reliable operation and easy maintenance. The inertial vibrating screen is driven by the inertial vibrator with eccentric block fixed in the middle to vibrate the screen box. Inertia vibrating screen can be divided into single shaft vibrating screen and double shaft vibrating screen according to the form of vibrator.
The screen of cyclone screen is cylindrical and placed in the machine body. After passing through the spiral conveying system, the materials are mixed with the air flow and atomized into the screen barrel; The materials are subjected to centrifugal force and cyclone propulsion force through the wind wheel blades in the mesh drum at the same time, so as to force the materials to spray through the mesh and be discharged from the fine material discharge outlet. The materials that cannot cross the mesh are discharged from the coarse material discharge outlet along the mesh drum wall.
Feature introduction
1. The whole machine has the advantages of small volume, light weight, stability, no vibration, low noise, good tightness and high efficiency;
2. Simple installation and convenient operation;
3. It can be used with single machine or multiple machines, and can operate continuously for a long time;
4. The screen is washed by the cyclone and can be cleaned automatically;
5. Redispersion function for agglomerated materials;
6. The new type of outer spherical bearing prolongs the service life;
7. The machine can be matched with the pneumatic conveying system and directly connected into the air path to save resources;
8. New design: the gas protection system can deliver the purified air to both ends of the equipment, which can effectively reduce the temperature produced by the equipment during operation; Form a gas isolation layer for the bearing, so as to eliminate the entry of dust, effectively prolong the service life of the bearing, reduce the maintenance frequency and improve the work efficiency;
9. Can be specially designed; Mesh drum rotation system to meet special needs.
The vibration motor is equipped with a group of adjustable eccentric blocks at both ends of the rotor shaft, and the excitation force is obtained by using the centrifugal force generated by the high-speed rotation of the shaft and eccentric block. The vibration frequency range of vibration motor is large. Only when the excitation power and power are properly matched can the mechanical noise be reduced. Vibration motors are classified according to starting and running mode and running speed
classification
According to the application occasion, it can be divided into ordinary vibration motor and explosion proof vibration motor.
According to the installation structure, it can be divided into horizontal vibration motor and vertical vibration motor.
Rotary vibrating screen
Product features
1. Small volume, light weight, convenient movement, the direction of discharge port can be adjusted arbitrarily, coarse and fine materials can be discharged automatically, and automatic or manual operation can be carried out.
2. High screening accuracy and efficiency. Any powder, particle and mucus can be used.
3. The screen is not blocked, the powder is not flying, the screening can be up to 500 mesh (28 microns) and the filtering can be up to 5 microns.
4. Unique grid design (mother and son type), long-term use of screen, convenient screen change, only 3-5 minutes, simple operation and convenient cleaning.
5. No mechanical action, easy maintenance, single-layer or multi-layer use, and the parts in contact with materials are made of stainless steel (except for medical use)
Drum screen is a kind of machinery widely used in separation technology. It controls the waste separation through the particle size, and the separation accuracy is high. The cylinder of drum screen is generally divided into several sections, depending on the specific situation. The screen holes are arranged from small to large, and the screen hole diameter on each section is the same.
Drum screen is mainly composed of motor, reducer, drum device, frame, sealing cover and inlet and outlet.
Working principle
The roller device is installed on the frame obliquely. The motor is connected with the drum device through a coupling through a reducer to drive the drum device to rotate around its axis. When the materials enter the drum device, due to the inclination and rotation of the drum device, the materials on the screen surface turn and roll, so that the qualified materials (products under the screen) are discharged through the discharge port at the bottom of the rear end of the drum, and the unqualified materials (products on the screen) are discharged through the discharge port at the tail of the drum. Due to the overturning and rolling of materials in the drum, the materials stuck in the screen hole can be ejected to prevent the screen hole from being blocked. The principle and structure of drum sand screening machine, drum screening machine and drum screen are almost the same, which is due to the difference in people's understanding and name.
Characteristic
1. The screen hole is not easy to be blocked.
2. Stable operation and low noise.
3. Simple structure and convenient maintenance.
4. The screening cylinder can be closed, which is easy to close and collect dust.
5. The whole machine has high reliability and less one-time investment.
6. Special screen is adopted, with high screening efficiency and long service life
Working characteristics
The eccentric block is used as the excitation force, which is strong.
The screen beam and screen box adopt high-strength bolts, with simple structure and convenient and fast maintenance;
Adopt tire coupling, flexible connection and stable operation;
It adopts the structure of small amplitude, high frequency and large inclination angle, so that the machine has high screening efficiency, maximum treatment, long service life, low power consumption and low noise.
According to the structure and working principle of screening machinery, there are roughly the following categories:
1. The working surface of roller screen is composed of one rolling shaft arranged horizontally.
2. The working surface of roller screen is composed of one rolling shaft arranged horizontally. The working part of the fixed screen is fixed, and the materials are screened by sliding along the working surface. Fixed grid screen is a kind of screen which is widely used in concentrator. It is generally used for pre screening before coarse crushing or medium crushing. The utility model has the advantages of simple structure and convenient manufacture. Without power consumption, the ore can be directly discharged onto the screen surface. The main disadvantage is low productivity and screening efficiency, which is generally only 50-60%.
3. The plane motion screen body swings or vibrates in a plane. According to its plane motion trajectory, it can be divided into linear motion, circular motion, elliptical motion and complex motion. Shaking screen and vibrating screen belong to this category.
Vibrating feeder, also known as vibrating feeder, refers to a kind of equipment that can evenly, regularly and continuously feed massive and granular materials from the storage bin to the receiving device. In the sand and gravel production line, it can feed the crushing machinery continuously and evenly, and coarse screen the materials. It is widely used in the crushing and screening combined equipment in metallurgy, coal mine, beneficiation, building materials, chemical industry, abrasive and other industries.
Performance characteristics
Feeder is a feeding equipment with advanced economic and technical indicators. Compared with other feeding equipment, it has the following characteristics: â? small volume, light weight and simple structure; â?¡ Convenient installation and maintenance, low operation cost; â?¢ High efficiency and large feeding capacity; â?£ Low noise, conducive to improving the working environment; â?¤ Low power consumption and high power factor; â?¥ The equipment works in far super resonance state, so it has stable amplitude, reliable operation and strong adaptability to various materials; â?¦ The feeding amount can be adjusted steplessly by adjusting the eccentric block. Simple structure, uniform feeding, good continuous performance and adjustable exciting force; Change and control the flow at any time, easy to operate; The eccentric block is the excitation source, with low noise, low power consumption, good regulation performance and no punching phenomenon; If the closed fuselage is adopted, it can prevent dust pollution, have stable vibration, reliable operation and long service life.
Application industry
The flapping vibrating screen not only plays a role in the laboratory, but also has made a lot of efforts to check the particle size composition of ordinary abrasives and graded superhard materials in the geological industry, metallurgical industry, chemical industry, construction industry, cement industry and pharmaceutical industry. Generally speaking, the best thing about the flapping vibrating screen is to screen and test the materials in various industries.
working principle
The motor drives the gear to the main shaft through the synchronous belt. After the gear is changed, the main shaft rotates according to the required speed. The main shaft drives the eccentric wheel to make the sliding plate move back and forth and drive the test screen installed in the sliding plate tray to shake left and right. At the same time, the main shaft drives the ejector rod gear to rotate. After the speed change, the ejector rod gear hits the ejector rod through the cam, and the ejector rod makes the racket hammer hit the upper cover of the test screen up and down, so that the test screen The materials in the sample separation screen reciprocate and vibrate up and down to screen the material particles smaller than the mesh on the screen surface of the test screen into the lower test screen. In this way, only the materials with the same particle size are left in each test screen. Achieve the separation of different particle sizes and determine the particle size composition of the material.
working principle
When the screw shaft rotates, due to the gravity of the material and the friction between the material and the groove wall, the material can only move forward along the groove bottom of the conveyor under the push of the blade, which is like the translational movement of the non rotatable nut along the rotating screw [3]. The main driving force of materials comes from the upward and forward force of materials along the tangent direction of the blade when the spiral blade rotates axially.
In order to make the screw shaft in a more favorable tension state, the driving device and discharge port are generally placed at the same end of the conveyor, and the feed port is placed near the tail of the other end as far as possible. The rotating spiral blade moves the material for transportation, so that the material does not rotate with the spiral conveyor blade. The force is the weight of the material and the friction resistance of the spiral conveyor shell to the material. The surface types of blades include solid surface type, belt surface type, blade surface type, etc. according to different conveying materials. The screw shaft of the screw conveyor is provided with thrust bearing at the end of the material movement direction to give the axial reaction force of the screw with the material. When the captain is long, the middle hanging bearing should be added.
The linear screen (linear vibrating screen) uses the excitation of the vibrating motor as the vibration source to make the materials be thrown up on the screen and move forward in a straight line at the same time. The materials evenly enter the feed inlet of the screening machine from the feeder, and several specifications of above and below the screen are generated through the multi-layer screen and discharged from their respective outlets. It has the advantages of low energy consumption, high output, simple structure, easy maintenance, fully enclosed structure, no dust overflow and automatic discharge, which is more suitable for assembly line operation
Scope of use
The screening and grading of powdery and granular materials are widely used in coal, hydropower, mining, building materials, chemical industry, plastics, abrasives, medicine, grain, carbon, chemical fertilizer and other industries
Working principle of linear vibrating screen
The driving force of linear vibrating screen is double vibrating motor, which relies on the excitation generated by vibrating motor to carry out operation. When two identical motors rotate in the reverse direction together, the eccentric block on the top will generate vibration force, which will be superimposed into a resultant force in the longitudinal and lower direction of the motor axis, and offset each other in the transverse direction of the motor axis, that is to say, the motion track of the screen machine is a straight line. Compared with the two motor shafts, the screen surface has a certain inclination in the vertical and downward direction. Under the dual action of vibration force and the gravity of the material itself, the material on the screen surface is thrown forward to make a jumping linear movement, so as to correctly fit the screen and complete the screening operation.
Main characteristics and application industry of linear vibration
linear vibrating screen is mostly suitable for screening all dry materials above 0.74mm, below 10mm, with moisture content less than 7% and without viscous materials. It has the characteristics of low energy consumption, high efficiency, easy maintenance, fully enclosed structure and no dust overflow, and more than enough screening for convective waterline operation.
linear vibrating screen is mainly used for screening dry powder and fine powder granular materials in abrasive raw materials, chemical industry, plastics, medicine, resin powder, ceramic raw materials, metallurgy, building materials, grain, chemical fertilizer and other industries.
Product introduction
Vibrating Ore Drawing Machine,Simple equipment manufacturing, small installation quantities and low cost; Due to the large vibration, the phenomenon of hanging arch and ore jam is reduced; It can effectively prevent the ore with high water content from running away; Wide application range and strong adaptability.
principle
The vibrating ore drawing machine takes the vibrating motor as the power source and uses the centrifugal force generated by the eccentric blocks installed at both ends of the main shaft of the vibrating motor in the rotating motion to obtain the excitation force, which drives the table surface of the vibrating ore drawing machine and materials to make periodic linear reciprocating vibration. When the acceleration of the vibration of the ore drawing body is vertically greater than the acceleration of gravity, the materials in the body are thrown up and jump forward according to the trajectory of parabola, and the throwing and falling are completed in an instant, Due to the continuous vibration of the vibration motor, the ore drawing body also vibrates continuously, and the materials in the body jump forward continuously, so as to achieve the purpose of ore drawing and ore conveying
It adopts advanced technologies at home and abroad such as vibration motor excitation, rubber spring vibration reduction, high wear-resistant screen plate and sealed screen box and advanced self synchronous vibration principle. It has the characteristics of long service life, low noise and high screening efficiency. It is a vibration screening equipment suitable for sinter, natural ore, coke and other powdery materials.
Equipment classification editing and broadcasting
Mining vibrating screen can be divided into: high efficiency heavy screen, self centering vibrating screen, elliptical vibrating screen, dehydration screen, circular vibrating screen, banana screen, linear vibrating screen, etc.
When the vibrating screen is used in multiple layers, the upper screen frame and the lower screen frame will look very compact with each other after they are placed. In fact, there will be some gaps. The strong vibration of the vibrating screen in operation can make some powdery or fine granular materials fly out of these gaps. At this time, if the gap between the screen frames is filled with the rubber strip of the vibrating screen, even if the vibrating screen vibrates strongly, the materials will not continue to fly out.
Product function
The rubber strip of vibrating screen has another function, that is to extend the working time of screen frame. To put it bluntly, the operation of the vibrating screen depends on the mechanical vibration force. The collision between the screen frames under strong vibration is inevitable, and the rubber strip of the vibrating screen is used to buffer them, reduce the collision between the screen frames, and its service life will naturally become longer.
characteristic
Up to 5 times the output per unit area; Accurate to 6-stage separation, screening efficiency up to 90% - 99%; The use of silicone rubber ball, ultrasonic and other high-efficiency net cleaning device system will not block the screen hole. Dust removal and safe operation; The acceleration is 4-5 times lower than that of the vibrating screen, which improves the service life of screening parts and reduces maintenance; Low noise < 75db. Optimized weight balance, low foundation dynamic load.
The dust-free feeding station system is composed of manual unloading bin, anti pressure feeding platform, unloading bin, filter screen, filtration system, dust collection system, back blowing air bag and other components. The transfer device using negative pressure dust collection is suitable for bag opening and feeding of transferred materials in the production process. It can store the scraps first and then transport them, so as to improve the conveying capacity. It can be applied to a variety of production processes, either as a single powder feeding and unloading equipment, or as an important powder unloading in powder conveying systems such as one point multi feeding and multi-point feeding. It can be connected with positive and negative pressure conveying to feed the production line.
Dust free feeding station
The dust-free feeding station is used for unpacking, feeding, screening and unloading of small and medium-sized bags of materials in food, pharmaceutical, chemical and metallurgical industries. It is especially suitable for manual feeding and pre screening of powder materials. During unpacking, due to the function of dust collecting fan, material dust can be avoided flying everywhere.
As a special unloading equipment, star unloader plays a great role in cleaning and cleaning, so it is necessary to summarize some of its characteristics, so that we can better understand and maintain the star unloader and give full play to its maximum ability.
brief introduction
The star unloader is installed at the discharge port of the unloader working under negative pressure. The upper part receives the materials discharged by the unloader. Relying on the rotating impeller, it plays the role of conveying materials and sealing to prevent air from being sucked from the discharge port in the process of pneumatic conveying and ensure the normal discharge of the unloader. As a special unloading equipment, it plays a great role in cleaning and cleaning. Therefore, it is necessary for us to summarize some of its characteristics, so that we can better understand and maintain the star unloader and give full play to its maximum ability.
brief introduction
The utility model has the advantages of compact structure, small volume, low energy consumption, high efficiency, no noise, convenient installation and use, simple operation, strong bearing capacity, long service life, fast rolling speed, reliable product quality and so on. Flange machine is to roll carbon steel, stainless steel and non-ferrous metal profiles into diameter320-6000mm ring and flange is a high-efficiency rounding device. It replaces the original complex processes such as steel plate blanking, butt joint, correction and lathe processing, and saves oxygen, acetylene, labor and raw materials. It is an advanced mother machine for manufacturing flanges.
Product introduction
The product is widely used in mechanical equipment industries such as fan, bridge formwork, chemical equipment, cable rack, mining explosion-proof switch and centrifuge. The flange forming machine uses the molds on the three rollers to roll various profiles, such as flat steel, channel steel, round pipe or other profiles with special-shaped section, into circular, arc and spiral shapes with certain curvature. The die of the machine is combined, which can be applied to a variety of profiles after changing the combination.
The utility model has the advantages of large production capacity, small volume, light weight, convenient installation, large feeding adjustment range, etc. The feeder is generally installed by crane or floor.
form
The reciprocating coal feeder is composed of a frame, a bottom plate (coal feeding trough), a transmission platform, a hopper, a gate, a idler, etc. When the motor starts, the bottom plate with an inclination of 5 �° is dragged by the elastic coupling, reducer and crank connecting rod mechanism to make a linear reciprocating motion on the roller, and the coal is evenly discharged to other equipment.
K-type reciprocating coal feeder
K-type reciprocating coal feeder is used for feeding coal or other loose granular materials with small grinding and chipping and low viscosity, and continuously and evenly unloading the materials in the storage bin or pit into the transportation equipment or other screening equipment.
Basic introduction
Vacuum feeder, also known as vacuum conveyor, is a dust-free closed pipeline conveying equipment that transmits particles and powder materials with the help of vacuum suction. It uses the air pressure difference between vacuum and ambient space to form gas flow in the pipeline and drive the movement of powder materials, so as to complete the conveying of powder. It is widely used in China's agricultural, heavy and chemical industries, as well as in the continuous improvement of foreign advanced technologies, such as vacuum, metallurgy and sideline industries.
Vacuum conveying is a kind of closed pipeline conveying, which can eliminate dust environmental pollution, improve the working environment, reduce the pollution of environment and personnel to materials and improve the cleanliness; Due to the pipeline transportation, the occupied space is small, which can complete the powder transportation in a narrow space, making the workspace beautiful and generous; In particular, it is not limited by long and short distances. At the same time, the vacuum feeding machine can reduce the labor intensity and improve the work efficiency; It is the first choice for the transportation of most powder materials.
Vibration mill is a kind of ultra-fine grinding equipment with ball or rod as medium. Medium vibration in the mill can crush materials less than 2mm to several microns. It has the advantages of high efficiency, energy saving, space saving and uniform product particle size. It has important advantages in the field of ultra-fine grinding and has been widely used.
The Palla tube type vibration mill developed in the 1970s in West Germany has entered more than 40 countries and regions around the world. From the ultra-fine grinding of industrial minerals and raw materials in the general metallurgy, building materials, non-metallic minerals, coal, chemical industry, light industry and other departments to the deep processing of new synthetic materials and magnetic materials, more than 100 kinds of materials have been processed.
Classification
According to the number of cylinders: single cylinder and multi cylinder;
According to the excitation form, it can be divided into inertia type and eccentric rotation type;
Grinding is divided into dry method and wet method according to whether water powder is added or not;
According to the operation method, it is divided into intermittent type and continuous type.
The rod mill is decelerated and driven by the motor through the reducer and the surrounding large gear, or by the low-speed synchronous motor directly through the surrounding large gear to drive the cylinder to rotate. The cylinder body is equipped with appropriate grinding medium - steel rod. Under the action of centrifugal force and friction, the grinding medium is lifted to a certain height and falls in a throwing or discharging state. The ground material continuously enters the cylinder from the ore feeding port, is crushed by the moving grinding medium, and the product is discharged out of the machine through overflow and continuous ore feeding to carry out the next process [2].
When 80% of the product particle size is required to be less than 2.0% to 0.5mm, the rod mill is generally used. The product particle size of the rod mill is generally no more than 4.7MM and no less than 0.4mm. The ore feeding particle size of the rod mill is 80%, less than 20mm to 4mm, and the maximum ore feeding particle size can also be up to 50mm. Due to the material of the grinding rod and other reasons, the length of the grinding rod shall not exceed 6.1m, otherwise it will cause bad consequences such as disorderly rods. Therefore, the specification of the rod unloader has not exceeded specification 4.6 Ã?? 6.3m.
When the ore is fed into the rod mill, the coarse particles are at the feeding end and the fine particles are at the discharge end: therefore, the rod group cannot be completely parallel and inclined during operation, which is also a reason why the grinding rod cannot be too long.
The grinding efficiency of the mill is high, the collision times of grinding medium is 50 times that of ordinary ball mill, and the grinding speed is 10 ~ 30 times higher than that of ordinary ball mill. It has good sealing performance, no dust overflow, low energy consumption, simple installation and convenient maintenance. It adopts rubber lining plate and non-metallic medium to basically realize iron free wear. It can grind inflammable and explosive materials intermittently, and can be filled with nitrogen for protection
brief introduction
Rotary vibration mill is a newly developed ultra-fine powder crushing machine with a wide range of crushing. It is suitable for chemical industry, dyes, rubber products, bakelite, ceramics, pesticides, medicine, building materials, cosmetics and other industries. It is suitable for intermittent, continuous, dry and wet grinding operations.
The grinding efficiency of the mill is high, the collision times of grinding medium is 50 times that of ordinary ball mill, and the grinding speed is 10 ~ 30 times higher than that of ordinary ball mill. It has good sealing performance, no dust overflow, low energy consumption, simple installation and convenient maintenance. It adopts rubber lining plate and non-metallic medium to basically realize iron free wear. It can grind inflammable and explosive materials intermittently, and can be filled with nitrogen for protection.
Precautions during installation of mud shale shaker:
1. During the transportation of drilling fluid shale shaker, the screen box and base must be fixed together, that is, the locking device must be locked in place to prevent the vibration of shale shaker from causing damage to parts during transportation;
2. When transporting the drilling fluid shale shaker, it is strictly prohibited to place other hard weights on the working bed surface of the screen box to avoid damaging the screen surface.
3. During the installation of drilling fluid shale shaker, the base support shall be kept horizontal and firm to prevent movement or vibration during the operation of shale shaker. During placement, an operation channel of 0.6 ~ 1m shall be reserved on both sides of the vibrating screen to facilitate the operation of workers.
4. During the operation of the vibrating screen, the screen liner shall be installed in strict accordance with the manufacturer's regulations or recommendations, and the tightness of the cloth cushion shall be appropriately adjusted according to the manufacturer's requirements to avoid affecting the service life of the screen due to improper tightness.
Mixer is a kind of construction machinery, which is mainly used to mix cement, sand, all kinds of dry powder mortar and other building materials. This is a machine with a shaft with blades rotating in a cylinder or tank to stir and mix a variety of raw materials into a mixture or suitable consistency. There are many kinds of mixers, including forced mixer, single horizontal shaft mixer, double horizontal shaft mixer and so on.
working principle
The mixer is determined by multiple parameters. It is impossible to describe a mixer with any single parameter. Shaft power (P), blade discharge (q), head (H), blade diameter (d) and mixing speed (n) are five basic parameters to describe a mixer. The discharge volume of the blade is directly proportional to the flow standard of the blade itself, the first power of the blade speed and the third power of the blade diameter. The shaft power consumed by mixing is directly proportional to the specific gravity of the fluid, the power standard of the blade itself, the third power of the rotating speed and the fifth power of the blade diameter. Under the condition of certain power and blade form, the discharge volume (q) and pressure head (H) of the blade can be adjusted by changing the matching of the diameter (d) and speed (n) of the blade, that is, the large-diameter blade with a mixer with low speed (ensuring constant shaft power) will produce higher flow effect and lower pressure head, while the small-diameter blade with high speed will produce higher pressure head and lower flow effect. In the stirred tank, the only way to make the micro clusters collide with each other is to provide sufficient shear rate. From the mixing mechanism, it is the existence of fluid velocity difference that makes the fluid layers mix with each other.
The test sieve is a kind of sieve which is used for screening and particle size analysis of granular materials in accordance with a certain standard specification. As a general measuring instrument, it has a wide range of applications. It is suitable for particle size analysis and screening test in geological exploration, metallurgy, chemical industry, medicine, building materials, abrasives, minerals, cement, glass, grain, ceramics, papermaking and other industries, as well as scientific research institutes
Useage
In many industries, particle size control is an extremely important factor of product quality. For example, in the particle size analysis and screening test conducted in geological exploration, metallurgy, chemical industry, building materials, abrasive and other industries, the particle size control directly affects the final quality or survey results. In scientific research and design, the particle size composition of the processed raw materials and products is an important design and calculation data. Therefore, the test screen is of great significance to production, scientific research and design in the national economy
Airflow screen is a high-precision screening equipment for screening fine powder. It is widely used in chemical industry, medicine, food, papermaking, metallurgy, building materials, rubber, machinery and other industries. It can continuously screen the powdery materials with fineness ranging from 80 to 500 mesh, and the screen can be changed at will. The air flow screen (air flow screen) has high screening efficiency, large output, accurate fineness, no over diameter mixing phenomenon, no load in the vertical installation of the screen, long service life, wide fineness range, fully enclosed structure, no dust overflow, low noise, low energy consumption, continuous operation and convenient maintenance
Working principle of airflow screen
Theoretically speaking, the airflow screen abandons the traditional operation principle of gravitational potential energy and opens up a new way of screening work by carrying fluid kinetic energy. It uses the high-speed airflow as the carrier in the closed state to make the fully diffused powder particles spray into the screen with enough kinetic energy to achieve the purpose of rapid classification.
Generally speaking, the airflow screen uses the characteristics of small and light powder particles, easy to float and good fluidity to fully diffuse them into the air flow. The powder is no longer agglomerated, but a single particle passes through the screen with the air flow in turn. Therefore, the airflow screen has large output, high efficiency, no sticking to the screen, no blocking the mesh and accurate fineness.
Structural composition
The cement fineness negative pressure sieve analyzer is mainly composed of sieve base, micro motor, dust collector, cyclone and electrical control.
instructions
1. before sieving test, adjust the digital explicit time relay, set it at 120s, put the negative pressure sieve on the screen seat, cover the sieve cover, turn on the power supply, adjust the negative pressure to -4000~-6000pa range, then turn off the machine.
2. Weigh 25g of sample, put it into a clean negative pressure screen, cover the screen cover, start the instrument again and screen continuously. During this period, if a sample is attached to the screen cover, tap the screen cover gently to make the sample fall. When the screen is full for 120s, the instrument will stop automatically.
3. After screening, weigh the residue with a balance
matters needing attention
1. Regularly pour out the cement in the dust collecting bottle.
2. If the negative pressure cannot meet the requirements of the national standard (- 4000 ~ - 6000pa) after using for a period of time, please clean the dust collection bag in the vacuum cleaner.
3. The vacuum cleaner shall not work continuously for more than 15 minutes, otherwise it is easy to overheat and burn out.
