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.

Production Process Of Wear-Resistant Steel

 

 

Process Development

In recent years, the surface strengthening technology of steel materials has developed rapidly, and new technologies for the production of wear-resistant steel have emerged.

 

How Wear-Resistant Steel Is Made

Wear-resistant steel is smelted in electric furnaces or converters, and the products are mostly castings. In recent years, forging, rolling and other hot processing materials are increasing. The production method of wear-resistant steel parts used in general machinery is not very different from other workpieces. Only in the heat treatment process or surface treatment process should be required to achieve the need to ensure wear resistance. For those steel parts where the metallurgical purity of the material significantly affects the wear resistance, refining measures should be taken. And the harmful impurities and gas limit requirements. In addition to the matrix, the number, shape and distribution of the second phase often have a significant impact on the wear resistance of steel parts. At this time, it is necessary to consider the design of the chemical composition of steel, smelting, hot processing, heat treatment (including thermomechanical treatment) and so on, in order to strive to achieve the requirements of improving wear resistance from metallurgical factors.

 

Processing Method

1. Through relevant process tests, master the general characteristics and cutting thickness range of various cutting methods of steel plates.

2. Steel plate cutting methods are applicable to cold cutting and thermal cutting. Cold cutting includes water jet cutting, shearing, sawing or abrasive cutting. Thermal cutting includes oxygen-fueled flame cutting ('flame cutting'), isoparticle cutting and laser cutting.

3、Flame cutting of high grade wear resistant steel is as simple as cutting of ordinary low carbon and low alloy steel. When cutting thick plates of wear-resistant steel, it should be noted that as the thickness and hardness of the steel plate increase, the tendency of cracking at the cutting edge increases.

 

How To Enhance Wear Resistance

Different surface strengthening techniques can be chosen to improve the wear resistance of steel parts under various types of wear conditions. Replace expensive alloy steels with less expensive base materials. Carburizing, carbonitriding, nitriding and other processes are still the main measures to strengthen mechanical parts. The use of co-infiltration, compound infiltration, boron infiltration, metal infiltration, spray welding, overlay welding, vapor deposition, electro-brush plating, ion injection and other processes in various working conditions of different parts have achieved significant results in improving wear resistance. In addition, casting processes such as casting infiltration and composite casting are also used in the manufacture of wear-resistant steel parts.

We are a wear resistance steel supplier, please feel free to contact us if you need them.

Understanding Abrasion And Wear-Resistant Steel(AR Steel)

Not all steels are the same. In fact, there are more than 3,500 different grades of steel, each containing unique physical, chemical, and mechanical properties to make them "custom-tailor" to suit specific applications. Even in certain steel groups, such as abrasion and wear-resistant steel (AR steel), there are many different grades, each with different chemical and mechanical properties, resulting in different properties.

 

Countless shadows of tough

Each number of these AR steel types refers to the hardness of the steel measured on the Brinell hardness scale. However, the processes used by the manufacturers of these AR steel grades can be very different, using different alloys, chemistries and heat treatments to achieve the specified hardness, yield, tensile strength and elongation of the final product. They are all wear-resistant, they all meet the Brinell hardness requirements, but they are all made by very different methods.

 

What makes steel AR?

AR steel alloy is made of steel billets containing different alloying elements such as carbon, manganese, chromium, nickel and boron. Of all these alloys, carbon is the most important for making steel wear resistant because it increases hardness and toughness. Then AR steel is produced through the "Quenching and Tempering" (Q&T) process, in which the grain structure is changed, the toughness is improved, and the brittleness is reduced.

Q&T is a two-stage process: when steel is brought to about 1500 degrees Fahrenheit and then cooled with oil, water or air, quenching occurs. This process increases the hardness. Tempering is the process of heating steel to approximately 300-700 degrees Fahrenheit, which makes the steel tougher.

 

 

Although the high-carbon alloy and Q&T treatment make the steel harder, it also reduces its tensile strength. Therefore, AR steel is used in situations where wear, abrasion, tearing and impact are the main issues, rather than constant tension or pressure. Therefore, AR steel is not suitable for structural structures such as beams in bridges and buildings. Common uses are in barrels, grilles, chutes, conveyor belts, mine bags, and armored vehicles and targets.

 

Better quenching, better steel

Most AR steels are water quenched because this is the fastest and cheapest option. Other AR steels are quenched by water, which destroys the grains, causing the microstructure to resemble a falling "pick-up sticks", making it more likely to be scratched and torn, and accelerate wear and deforming the steel.

Abrasion resistant steel is a steel material with strong wear resistance containing chemical elements such as silicon, manganese, chromium, copper, vanadium and so on.

Abrasion-resistant (AR) steel plate is a high-carbon alloy steel plate. Due to the addition of alloys, AR has formability and weather resistance. Due to the addition of carbon, its hardness is higher.

We are AR steel suppliers. If you need abrasion or wear-resistant steel materials, give us a call and let us know the application, conditions, and components you need from your steel. Our team will work with you to recommend unique steel varieties that are very suitable for your application.