Vibrating Screens Use General Knowledge

 

 

Do you know what you need to pay attention to when using a vibrating screen? Read on for more tips on how to use a vibrating screen.

 

Installation of vibrating screen

1. Remove the transport support. Since the base of the sieve machine and the screen frame are connected by springs, the upper part of the sieve machine is firmly supported by transport support during transportation. After entering the installation site, the transport support should be taken down. It is strictly forbidden to try the machine without taking the transport support.

2. The sieve machine should be installed on a horizontal foundation. In the occasion of not playing the foundation, should be laid between the table and the machine seat anti-vibration rubber plate.

3. The vibrating motor and the cable line in the screen machine are subjected to severe vibration, and the standard ground should be connected for safety.

 

Adjustment of the phase angle of the upper and lower weights of the motor

1. Changing the phase angle of upper and lower hammers can change the trajectory and residence time of materials on the net. In order to make the sieve machine adapt to the separation state required by various materials, such as the distribution of materials, processing capacity, separation efficiency, over the net rate, and other changes. It should be adjusted to the best condition.

Note: The direction of operation of the two motors is reversed to each other! Two motors can run inward or outward at the same time.

2. motor phase angle adjustment. The phase angle of the upper and lower weights decreases or increases, and its effect is to increase or decrease the excitation force of the sieve machine. According to the number of layers of the user's sieve machine, the material-specific gravity is different to increase or decrease the excitation force. Adjustment of the phase angle of the motor weight can achieve the best screening effect. The phase angle of the motor up and down must be the same.

3. sometimes due to the specific gravity of the material, humidity, stacking tilt angle, and other parameters, the above adjustment phase is not possible to adjust successfully at once. So please ask the user to have sufficient patience to adjust, so that the sieve machine can play the high efficiency as it should.

 

Test run

1. Close the power switch, run 20-30 minutes air rotation, the motor should normally run in a counterclockwise direction, if the direction is not correct, please adjust the three-phase power supply.

2. should confirm that the vibration motor is running within the rated current, at the beginning of the operation, especially in low-temperature occasions, the current will be slightly higher, but within 20-30 minutes, it should be reduced to the rated current value.

3. Vibrating screen shall not have abnormal sound occurring, if the abnormal sound occurs, the machine shall be quickly shut down for inspection, the occurrence of abnormal sound is generally caused by the fastening part loosening. Especially in the transport and disassembly and reassembly, pay attention to the fastening of the parts. Sieve machine in the start and stop when there is a momentary resonance area (1-3 seconds) when the amplitude and noise will increase significantly, is a normal phenomenon.

4. After the empty operation, a small amount of material can enter the sieve machine through the inlet, and then slowly increase to the required and can withstand the amount of material, at this time should be adjusted according to the net surface out of the heavy hammer, so that the efficiency of the sieve machine to achieve the best state.

5. The general material of this series screen machine is not equipped with a bouncing ball device to meet the screening requirements, special materials need to be equipped with bouncing ball device separately designed and installed, no-load noise will increase at this time.

 

Screen mesh replacement

1. When the screen is found to be broken and needs to be replaced with a new screen, just loosen the external locking handle, take off the screen grid, take out the screen frame, remove the rubber seal, fasten bolts, and loosen the fastening bolts of the screen frame to replace the broken screen.

2. Then replace the screen with a new one, and reassemble it according to 6.1 in reverse order. Note: the net must be flat and solid, to lock the lower bolt of the screen frame first, and then lock the upper bolt, the two external V-groove bolts must be tightened.

 

Maintenance of equipment

1. The equipment should be refueled frequently when it is running, twice a week, inject Shell, Avalanche, RL3 grease.

2. every three months to carry out minor repairs and maintenance, 6-12 months for a major overhaul, overhaul to check the motor, the fasteners are not loose, disassemble the vibrator to clean and check the bearings, oil seals, serious wear should be replaced.

3. regularly check the cable (three months to change the motor lead)

 

We are a vibrating screen supplier, please feel free to contact us if you need them.

How Does a Swivel Joint Work?

 

 

Swivel Joints come in various shapes and sizes based upon the application and the environment where it goes through. While style consideration needs to be provided to outside elements, all the swivel joints have 2 primary components: a shaft as well as real estate.

The idea behind a swivel allows the shaft to rotate while the real estate remains fixed-ready. The shaft has actually pierced holes of varying size and also depth beginning with its leading surface area. Variable opening midsts, as well as markings, define the circulation path of fluid within the swivel. Via inner design, the fluid is performed the shaft right into and also out of the swivel joint.

The real estate system includes machined flow as well as grooves to assist in liquid transfer within the swivel and also protect against cross leakages. Phoned number markings are found on the real estate outer diameter surface area and also the same can be discovered on the leading surface area of the shaft.

These numbers specify where an individual would anticipate the fluid to move in/out in between shafts as well as real estate via the machined inner passages. A collection of very carefully selected inner elements are fitted between the shaft as well as real estate at specified locations. These include seals, breaks rings, O rings, wearings, tiny bearings in specific applications.

The choice of interior parts is of vital importance while designing a swivel joint as severe interest needs to be given to the tolerances as well as the inner layout of the real estate grooves. Failing to comply with the advised layout and also machining requirements leads to leaking elements.

The flow of power, as well as signals, are sometimes required for particular applications and industries. Slide rings can be incorporated with the swivel joint via passing electrical cable televisions within the hollow inner size of the shaft.

 

Exactly how to Select a Swivel Joint?

 

In contrast to various other rotary parts in the exact same industries, a swivel joint mostly endures interior loads while functional. This is a direct outcome of pressurized fluid flowing within its interior components. To pick an appropriate swivel joint, multiple influencing factors should be thought about.

The most influencing element on a swivel joint is the inner securing option between the shaft and also housing. Really precise tolerances have to be preserved during the machining phase to create the required grooves for seals as well as inner elements to be fit.

Seals, o-rings, use rings, and bearings are inserted within these internal grooves and have to be able to endure the pressures caused by the fluid Swivel joints are rated by the manufacturer regarding their recommended operating pressures, temperatures, and speeds.

These values are directly associated with the interior elements requirements, geometric machining tolerances, and type of liquid used the substantial layout as well as area factors to consider the need to be given for a swivel joint and its ports.

Based on application needs, a swivel joint might have up to 9 different ports to provide fluid with various flows. A greater variety of paths result in substantial dimension as well as product boost.

Swivel joints can be customized in dimension as well as port dimensions with respect to application requirements. Space constraints, lots requirements, task cycle, as well as environmental surroundings are all variables that are taken into consideration while choosing an appropriate part

 

We are a swivel joints supplier, please contact us if you need them.

Know About Swivel Joint

 

 

What is a Swivel Joint?

 

Swivel joints, also known as rotary unions are made use of in applications where a continuous transmission of fluids from a stationary resource to a revolving resource is called for without cross-contamination or leak. Normal applications use swivel joints to allow for 360-degree rotation while maintaining hoses from obtaining tangles as elements transform. In return, mechanical stress and anxieties that would result from hose pipe turning, flexing, as well as extending can be alleviated.

Swivel joints are crafted to operate at a variety of pressure and also temperature levels for a variety of conditions as well as settings. Based upon market needs, the swivel joint can be designed to have numerous flows as well as can transfer different sorts of liquid all at once at numerous rotational rates. Generally, as the number of passages increases, the size boosts, and the rate will certainly be reduced.

 

How Does a Swivel Joint Work?

 

Swivel Joints come in various shapes and sizes based upon the application and the environment where it goes through. While style consideration needs to be provided to outside elements, all the swivel joints have 2 primary components: a shaft as well as real estate.

The idea behind a swivel allows the shaft to rotate while the real estate remains fixed-ready. The shaft has actually pierced holes of varying size and also depth beginning with its leading surface area. Variable opening midsts, as well as markings, define the circulation path of fluid within the swivel. Via inner design, the fluid is performed the shaft right into and also out of the swivel joint.

The real estate system includes machined flow as well as grooves to assist in liquid transfer within the swivel and also protect against cross leakages. Phoned number markings are found on the real estate outer diameter surface area and also the same can be discovered on the leading surface area of the shaft.

These numbers specify where an individual would anticipate the fluid to move in/out in between shafts as well as real estate via the machined inner passages. A collection of very carefully selected inner elements are fitted between the shaft as well as real estate at specified locations. These include seals, breaks rings, O rings, wearings, tiny bearings in specific applications.

The choice of interior parts is of vital importance while designing a swivel joint as severe interest needs to be given to the tolerances as well as the inner layout of the real estate grooves. Failing to comply with the advised layout and also machining requirements leads to leaking elements.

The flow of power, as well as signals, are sometimes required for particular applications and industries. Slide rings can be incorporated with the swivel joint via passing electrical cable televisions within the hollow inner size of the shaft.

 

Exactly How to Select a Swivel Joint?

 

In contrast to various other rotary parts in the exact same industries, a swivel joint mostly endures interior loads while functional. This is a direct outcome of pressurized fluid flowing within its interior components. To pick an appropriate swivel joint, multiple influencing factors should be thought about.

The most influencing element on a swivel joint is the inner securing option between the shaft and also housing. Really precise tolerances have to be preserved during the machining phase to create the required grooves for seals as well as inner elements to be fit.

We are a Swivel Joint supplier, please contact us if you need them.

What Are the Types of Vibrating Screens?

 

 

Do you know the types of vibrating screens? Read on for more information.

 

Inclined screen

 

The inclined screen is the simplest type of screen, mounted on a frame inclined at an angle between 15° and 30°. The entire screen body oscillates on circular coil springs with the same characteristics, and the material flow is fed by gravity acceleration.

 

Inclined screens consist of eight basic components, namely side walls, bridges, screen material, exciter, electric motor, motor support, spring and spring supports. The main critical factor of inclined screens is their flawless design. All the parts mentioned here are assembled with nuts and bolts to prevent the screen body from breaking and failing due to welding.

 

The inclination of the tilting screen is fixed, but the stroke can be adjusted to the desired level. The general working stroke of a tilting screen is between 8 and 12 mm, and the design of tilting screens allows this stroke to be changed by adding or removing additional eccentric weights on the exciter.

 

Tilt screen exciters are usually driven by an external electric motor that transmits power through a belt and pulley mechanism. Oscillating exciters are not used for tilt screens because of their rigid operating principle. The advantage of the circular vibratory exciter mechanism used in tiltable screens is its simplicity, low maintenance requirements, and economical design.

 

Tiltable screens are usually equipped with multiple decks so that the material can be classified into 2 to 5 classes. In addition, these screens are usually equipped with an impact zone just before the start of the screen section, which breaks up the material and ensures that the long pieces are deposited horizontally during screening.

 

Horizontal screen

 

A horizontal screen is an unconventional design with unique features that distinguish it from other conventional screen types. Its most obvious advantage is its working angle. While conventional screens operate at an angle between 15° and 30°, horizontal screens are placed parallel to the ground or at a slight angle between 0° and 5° degrees.

 

The stroke of horizontal screens can be adjusted in the range of 14 to 20 mm, although they generally operate with a stroke of 16 to 18 mm and a rotational speed of 750 rpm. The flow velocity of the material in the screening medium varies between 0.2 m/s and 0.25 m/s. The mass throughput depends on the phase angle differences between the eccentric masses.

 

Horizontal screens are equipped with a triple drive mechanism that produces an elliptical oscillatory motion with the desired stroke and inclination. As mentioned in the previous section on the excitation mechanism, the triple drive mechanism combines the linear and circular vibration modes into one elliptical vibration. In this way, the advantages of both types of vibration are combined in a horizontal screen so that the material is transported horizontally at a speed determined by the linear vibration motion, while the circular vibration characteristic of the elliptical motion prevents sedimentation.

 

Horizontal screens have brought many advantages to screening operation, although they also have some disadvantages, the most important of which is the complexity of the triple drive mechanism. Although the triple drive mechanisms are designed to be robust enough to withstand all conditions, the maintenance procedures are not short, although the robustness of the design makes frequent maintenance unnecessary.

 

Dewatering screen

 

Dewatering screens are designed to remove water from the slurry and reduce the water content of the material. These systems consist of a pair of vibration motors, support for the vibration motor, screen support, and a screen. The screen surface is slightly inclined (between 0° and 5°) to facilitate dewatering, and the operating speed is between 1000 and 1500 RPM.

 

Unlike screens for dry materials, dewatering screens operate with G-forces greater than 5 g and ensure perfect dewatering. Generally, a range of 5 g and 6 g is used. This condition is necessary for good dewatering.

 

The counter-rotating vibrators generate a linear vibration that causes the screen body to vibrate with the slurry. The water contained in the slurry is dewatered by the vibration and runs off the bottom of the screen surface as the material is advanced. In this way, a pool of water forms in the valley, while the sand accumulates on the downward sloping surface. The upward slope of the grate, combined with a drainage channel, creates a deep bottom that serves as a filter medium and retains material much finer than the grate openings.

 

Due to the humid and corrosive environment of the dewatering silo, rubber springs must be used in the support legs to absorb the vibration load of the moving frame, extending the life and maintenance time of the screen.

 

High-frequency screens

 

High-frequency screens are designed to provide higher throughput and more efficient classification than conventional screens. High-frequency screens use aggressive vibrations that act directly on the screen, providing the highest capacity on the market for removing fines and cleaning chips, dry sand, and more.

 

The high frequency and low amplitude provide higher speed material movement without loss of screening efficiency. This combination of high frequency and amplitude is ideal for fine material screening, where coarse particles are lifted higher while finer particles remain closer to the screen, increasing the likelihood of separation with high-frequency screens.

 

Unlike other types of screens, the vibration motors of high-frequency screens are mounted in each plane rather than in the screen housing. The aggressive vibrations are transmitted directly to the material being screened in the range of 3600 to 5000 rpm, resulting in higher productivity and more efficient screening than conventional screens. Under the influence of the high-frequency vibrations, the depth at the bottom is reduced, allowing stratification and better screening performance.

 

We are a Vibrating Screen supplier, please feel free to contact us if you need them.

Types Of Butterfly Valves

 

 

As the most common architectural valve, the butterfly valve was invented by the Americans in the 1930s and promoted in the country in the 1970s. At present, there are many classifications and wide applications. The picture above is the most basic butterfly valve, the structure mainly includes, drive, valve body, seal, valve plate, and connection.

 

Classified by valve body material

There are about two types, cast iron and cast steel. If cast iron does not specifically refer to ductile iron, gray cast iron is used. The same is true for cast steel. Carbon steel is usually used if stainless steel is not specifically mentioned.

 

Connection type classification

There are common clamps, lugs, and flanges. Among them, the clamp method is widely used in the field of construction and buildings, and the cost performance is higher. Wafer butterfly valves are connected between two pipe flanges with stud bolts. Flanged butterfly valve has a flange on the valve, and bolts are used to connect the flanges at both ends of the valve to the pipe flange. The lug type butterfly valve has two types of connection holes, one is a through hole. This type of connection requires stud bolts like the wafer connection. The other is a threaded hole, which functions as two nuts during the connection process, and is fixed in the middle of the pipe flange with two bolts.

 

Hydraulic System Valves

 

Classified by drive form

Commonly used in buildings are manual (handle, turbine) and electric, while pneumatics are rarely used. The movement of the valve plate is affected by the center line and eccentric (single eccentric, double eccentric, triple eccentric) structure.

 

Classified by seal

There are two types of soft seal and hard seal. The soft seal is more commonly used in buildings, and the material is mostly EPDM or NBR.

Distinguishing the types of butterfly valves helps you choose the most suitable butterfly valve. We are a manufacturer of butterfly valves, providing you with all kinds of high-quality butterfly valves. Please feel free to contact us if you need them.

How To Maintain High Speed Rotary Union To Extend Service Life？

 

High Speed Rotary Union

 

High-speed rotary union is a type of rotary joint. High-speed rotary joints are used for high-speed interface transmission media. High-speed rotary joints are different from ordinary rotary joints, so you must pay special attention to them during normal use. Now let's take a look at the daily maintenance of high-speed rotary joints.

 

Maintenance Methods

1. Sealing surface

Check the wear condition and thickness change of the sealing surface (generally, the normal wear is 5-10mm); observe the friction track of the sealing surface to see if there are three-point discontinuity or scratches. If these problems occur, don't hesitate to replace the rotary joint immediately.

 

2. Clean regularly

Special attention should be paid to the inside of the rotary joint drum and pipeline, and a filter should be added when necessary. This is because many foreign objects will cause strong wear on the rotary joint, and frequent cleaning can effectively extend the service life of the rotary joint.

 

3. Long-term non-use

If the general machine is not used for a long time, it will cause scaling and rust inside the rotary joint. If it is used suddenly, it will get stuck or drip.

 

4. Regular oil injection

The oil injection device should be oiled regularly to ensure the reliability of the rotary joint bearing operation. Rotary joints that circulate heating medium should gradually generate temperature to avoid sudden temperature changes.

 

Tip: Generally, after the high speed rotary union is used, a lot of small deposits will appear. In this case, if the machine stops running, the rotary joint must be folded down for cleaning, and stored properly, and then installed when the machine needs to run. This method can significantly increase the service life of the high speed rotary union.

We are a high speed rotary union supplier, please feel free to contact us if you need them.

What Is Abrasion Resistant Steel?

AR steel plate is a high-carbon composite steel plate, which means that AR is formable and climate-safe due to the additional combination. This is even more difficult due to the choice of carbon. The carbon element is included in the development of the steel plate, which impressively establishes the hardness and durability, but reduces the quality. Since then, the plates have been used under conditions where mileage and scratching areas are the main drivers of disappointments. Currently, materials with or without "f" are compatible, but traditionally, materials with "f" basically indicate that it is formable and can be bent in a specific way without breaking. When the factory produces non-formable and formable steel plates at the same time, forming is more costly to some extent. However, increasing attention and diminishing interest have led to the creation of formable AR steels.

AR material is made of hardened steel square or metal. During this process, the grain structure changes to expand the hardness and support formability, resulting in through hardening of the material. Quenching and tempering is a two-stage process:

Quenching refers to placing steel at a high temperature between 1500-1650 degrees Fahrenheit and then rapidly cooling it with water. This process shapes the gem structure inside the iron and increases the hardness.



Tempering is to reheat the quenched steel to 300-700 degrees Fahrenheit below the initial temperature, and then allow the steel to cool at a typical air temperature. Reheating the material separates the precious stone structures framed during the quenching process. At the same time, extended cooling allows for the reform of the gem structure, maintaining a more important part of quality and hardness, but increasing flexibility.

Wear-resistant steel is made of iron minerals, carbon and other alloy components, just like different steel types. The iron metal is dissolved in an impulse heater, which will expel harmful substances in the minerals. Carbon and other alloy components are included during this time. Especially wear-resistant steel contains additional carbon and alloying elements. A substance that prevents oxidation is added to the liquid pool. After that, the wear-resistant steel is formed, heated, and cut.

Applications for abrasion-resistant steel include dumping linings, construction accessories, conveyors, gratings, barrels, body armor and ballistic panels. Wear-resistant steel is valuable in any application where scratch and effect resistance are critical. Some standard investment projects include: mining, development, material dealing with and total.

Abrasion-resistant steel plate is excellent and wear- safe, guarding admirably against scratches and scrapes. This kind of steel plays an admirable role in the harsh environment, and offers some effect obstruction. Wearing a safe steel plate will ultimately help extend the life of the application and reduce your expenses in the long run.

We are Abrasion-resistant steel suppliers. Please feel free to contact us if you are interested in our abrasion-resistant steel or other products.