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Tubular Screw Conveyor

What is Tubular Screw Conveyor

Tubular screw conveyor is a kind of conveying equipment widely used in mining, chemical industry, feed, grain and oil, cement plant, commercial concrete and construction industry. It is suitable for horizontal conveying and tilting of loose materials such as powder, granular and small blocks.

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Kunwei Machine doesn't just sell equipment; we provide tailored engineering solutions. Based on your material density, lump size, and moisture content, our engineers calculate the optimal belt tension and motor power to ensure energy efficiency and system longevity.

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With decades of experience in the bulk material handling industry, Kunwei has successfully delivered belt conveyor systems to mining and construction projects in Southeast Asia, Africa, and South America. We offer full technical support, from initial design drawings to overseas installation guidance.

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Our products all have passed test of ISO90001. All of our products comply with international quality standards and are greatly appreciated in a variety of different markets throughout the world.

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Seamless Tube Carbon Steel Incline Screw Conveyor

Built for high-pressure and abrasive environments, this conveyor features a seamless carbon steel tube for maximum structural integrity. The seamless design eliminates weld-seam weaknesses, providing

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Vertical Screw Conveyor

The Kunwei Vertical Screw Conveyor is a high speed tubular lifting system designed to transport bulk materials straight up at a 90 degree angle. Utilizing high rotational speeds to generate

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Horizontal Tubular Screw Conveyor

Horizontal Tubular Screw Conveyor for dust-free transport of powders and granules. Available in Carbon Steel or Stainless Steel (304/316). Ideal for food, chemical, and industrial applications.

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Inclined Pipe Screw Conveyor for Flexible Angle Material ...

Kunwei Inclined Pipe Screw Conveyors are engineered for versatile elevation changes in bulk material handling. Designed with a fully enclosed pipe structure, this system ensures dust-free transport

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LSY Spiral Screw Conveyor for Concrete Batching Plants

The Kunwei LSY Series is a specialized tubular screw conveyor designed efficiently for transporting cement and fly ash in concrete batching plants. Unlike standard screw conveyors, the LSY series

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Advantages of Tubular Screw Conveyors

There are several advantages to using this type of screw conveyor:

There are relatively low manufacturing costs involved compared to other conveying procedures such as belts, pneumatic devices or aeromechanical machines.

They are highly suitable for conveying dry or semi-fluid bulk materials in an entirely enclosed space, thereby reducing the threat of hazardous contamination, dust, spillage and subsequent waste.

Tubular screw conveyors require little storage space and can be used in compact environments, making them flexible for smaller manufacturers. In addition, thanks to their design, they can, if needed, be installed at an angle in situations where a height difference needs to be overcome.

The design is highly versatile and provides a range of solutions for the handling and transporting of granular and powdery materials.

They are easy to install in-house and require little maintenance and cleaning, thanks to high-quality stainless steel and steel sealing techniques.

Thanks to their design, they have a long service life, adding to their cost-effectiveness.

Tubular screw conveyors can be angled from 0 to 90 degrees for flexible movement and transportation. This is also advantageous because they can be used in a horizontal or vertical position and any incline needed to handle particular products. In addition, they can operate with significant pressure differences.

Tubular screw conveyors can be designed with flights, bearings, covers, inlets, outlets and mountings according to your own specifications and needs.

What is A Screw Conveyor Trough?

The screw conveyor trough on a screw conveyor is the housing that contains the screw and that the powder bulk material rides on. Like most screw conveyor parts, the term has some loose affiliation with the agricultural industry. The trough, or screw housing, being similar to that of a pig trough. Some people call it the housing or U-tough and there are a few other terms that have been thrown around, too.

Selecting the proper screw conveyor trough is very important because the material being conveyed is enclosed by it. The conveyed material induces abrasive wear and can eventually wear a hole in the trough, posing a major safety concern from both the exposure to the moving screw and the exposure of the material in the trough to the atmosphere. Most troughs come in standard lengths of up to either 10ft or 12ft and are usually made of some light gauge material like 12GA or 7GA mild steel (A36). The shape of the trough is important, too. The most common configuration is the U-shaped trough, but round, flared and rectangular troughs are common, too.

In the case of long screw conveyors with multiple screws connected using hanger bearings, the trough also support the weight of the screw, in addition to conveying the material. Because of this, the trough rigidity and alignment are important to the long term success of the screw conveyor. In most cases, a standard trough is rigid enough for a standard screw and hanger. If a nonstandard length screw is used, the trough must be evaluated to see if it can support the heavier weight of the screw. If the screws are being supported with hanger bearings then the alignment of the trough will influence the alignment of the screws. Screws that are out of alignment can rub the trough, fatigue the shaft and/or cause accelerated wear of the hanger bearing.

Replacement of the trough is usually pretty easy. There are 6-12 bolts located at each end that once removed (and the screw supported) the trough can be removed and replaced. Patch kits are also available if a hole wears in a specific area. Patch kits are made of abrasion resistant material and conform to the outside shape of the trough.

Selecting the proper trough for your application can be one of the most important decision in ensuring the screw conveyor has a long and productive life. With so many options, it can be hard to know which ones will be right for the application and how much impact the option will have to the cost of the trough. The following factors break down the major considerations when selecting a screw conveyor trough. This information is also useful in illustrating how various options can have huge impacts in the cost of a screw conveyor.

Different Types of Tubular Screw Conveyor

Tubular screw conveyors offer various standard solutions for the handling of powdered or granular materials, different models of conveyors or feeders are available for concrete production (fly ash, filler dust, silica fume), premixed construction Materials (dry plaster, sand, cement, additives), glass processing (calcium carbonate, soda, sand, etc.), foundries (sand, bentonite), etc.
In addition, different types of tubular screw conveyors also correspond to different uses, please see the following explanation:

Stainless Steel Tubular Screw Conveyor
Tubular screw conveyors of this type are available in SS304 or 316L stainless steel and must strictly avoid any contamination of the material handled and applications that require absolute cleanliness and perfect corrosion resistance. It can be used in food processing and packaging, flour and animal feed processing, food processing and packaging, plastics and chemicals, and the pharmaceutical industry.

Micro Tubular Screw Conveyor
Micro Tubular Screw Conveyors are designed for small feed volumes and laboratory applications, typically used in the production of chemicals and pharmaceuticals or any process that requires precise conveying of small quantities, with capacities ranging from 0.5 kg/h to 1000 kg/h. etc., the length is generally 200mm-2000mm.

Cement Tubular Screw Conveyor
The cement tubular screw conveyor is specially designed for the volume feeding of cement or similar materials, and is mainly used for conveying or feeding cement and cement-like materials in concrete batching plants and other building material processing plants.

Application of Tubular Screw Conveyor

Tubular screw conveyors are widely used in various industries for the transportation of powders, granules, and other bulk materials. They consist of a rotating screw inside a tube, which moves the material along the length of the tube. Here are some common applications of tubular screw conveyors:

Chemicals
The chemical industry often uses tubular screw conveyors to transport powders, granules, and other materials. These conveyors can be used to move materials between different stages of the manufacturing process, or to load and unload vessels.

Pharmaceuticals
In the pharmaceutical industry, tubular screw conveyors are used to transport powders and granules for the production of pills, capsules, and other medications. They are often used to move materials between different processing stages, such as mixing, granulation, and tablet compression.

Food Processing
In the food processing industry, tubular screw conveyors are used to transport ingredients such as flour, sugar, and spices, as well as finished products like snacks and cereals. They are often used to move materials between different processing stages, such as mixing, baking, and packaging.

Plastics
The plastics industry often uses tubular screw conveyors to transport plastic pellets, powders, and other materials. These conveyors can be used to move materials between different stages of the manufacturing process, such as extrusion, injection molding, and blow molding.

Agriculture
Tubular screw conveyors are frequently used in the agricultural industry to transport grains, animal feed, and other bulk materials. They can be used to move materials between different parts of a processing facility, or to load and unload trucks and railcars.

Trough Screw Conveyor VS Tubular Screw Conveyor

Trough screw conveyors and tubular screw conveyors are two common types of mechanical conveyors used to transport bulk materials. While both types of conveyors are used to move materials from one point to another, they differ in their design and application. Here are some key differences between the two:

Design
Trough screw conveyors have a U-shaped trough that runs horizontally, while tubular screw conveyors have a cylindrical tube that runs vertically or horizontally.

Capacity
Trough screw conveyors are generally larger and can handle higher capacities than tubular screw conveyors.

Material Handling
Trough screw conveyors are better suited for handling wet or sticky materials, while tubular screw conveyors are better suited for handling dry materials.

Flexibility
Trough screw conveyors are more flexible in terms of their ability to handle different materials and flow rates, while tubular screw conveyors are more rigid and are best suited for handling materials with consistent flow rates.

Maintenance
Trough screw conveyors are easier to maintain and clean due to their open design, while tubular screw conveyors can be more difficult to maintain and clean due to their enclosed design.

The choice between a trough screw conveyor and a tubular screw conveyor will depend on the specific application and material handling requirements. Trough screw conveyors are generally better suited for handling wet or sticky materials, while tubular screw conveyors are better suited for handling dry materials with consistent flow rates.

How to Get the Most Out of Your Flexible Screw Conveyor

Increasing Conveyor Performance and Efficiency
Due to their relatively low cost and simple construction, flexible screw conveyors are one of the most common types of conveyors used by manufacturers. The reason for this is that the screw is the only part of the conveyor that moves. The only other major components are the tubular housing, and the electric motor that drives the screw (also called the auger).

Despite its uncomplicated, yet reliable construction and straightforward operation, many end-users overlook important factors that could potentially lead to poor performance, excessive power usage, severe wear, and material degradation. For these reasons, it is essential to consider all system parameters when selecting conveyor options. Only then can you ensure a correct and successful installation that achieves maximum operational efficiency.

Specifications
The flexible screw conveyor has a helicoid screw that rotates inside a fixed tube. Screw conveyors typically range in diameter from 2 1/2 to 8 inches, and can be used for horizontal transports of up to 80 feet, and inclines of up to 60 degrees. An 8 inch diameter screw conveyor can transport 1,800 cubic feet/hour at 360 RPM at a 45 degree angle. The flexible screw is made from stainless steel, and is available in round, flat, square bar, and beveled edge configurations. As the screw rotates, it creates directional force that moves the product through the tube. At the same time, it also creates centrifugal force that moves the material against the wall of the tube.

Material Characteristics
The characteristics of the material being conveyed is an extremely important element to consider when selecting any conveyor. Flexible screw conveyors can move many types of materials, such as powders, crystals, flakes, granules, pellets and irregular shapes. But even then, you need to consider how the material will affect the conveyor, as well as how the conveyor might affect the material. For example, certain materials – such as TiO2 or salt – have the potential to create friction within the flexible screw conveyor. This can cause some particles to be crushed, heated, or chipped during transport. In addition to having a negative effect on the product itself, material friction can cause the conveyor's motor to be overtaxed, increasing wear and eventually leading to failure if left unchecked. Or, the actual material being conveyed could build up on the screw and cause it to stall.

Flexible Screw/Auger Types and Characteristics
There are many auger designs to choose from, each addressing the challenges presented by different material characteristics. To get the best results possible from your flexible screw conveyor, select the auger type that best suits the material you need to convey.
Flat wire augers are used for conveying powders or other light materials, and are made of rectangular or square wire. The flat conveying surface wire. The flat conveying surface applies a more positive forward directional force on the product being conveyed and reduces the outward force against the tube wall.

Beveled or Square Bar
This type of auger is specifically designed to convey difficult-to-handle or fragile material with minimal product degradation or damage. The beveled auger must be installed straight. It maintains a much lower maximum allowable RPM level, and operates at a maximum of 600 RPM.

Round Wire
These flexible screws are made from a coiled round bar, and are mainly used for heavy or highly abrasive materials. The biggest asset of this auger design is its strength and flexibility, which minimizes the load imposed on it by material weight, particle shape, or material size. The round wire auger design creates high slippage and stronger outward forces on the conveyed product.

Centercore
Flexible Screw Conveyor Center Core | Hapman.comThis is a small tube placed in the center of the screw and extends the full length of the auger. The centercore restricts the space by reducing the amount of material allowed to enter the conveyor, which in turn reduces the load imposed on the screw. Use a center core when conveying very dense products or highly aerated or fluid product.

Capacity and Power Requirements
Many factors affect capacity and power requirements. The most common elements to consider are material particle size, material bulk density, material flowability, conveyor length, auger rotation speed, conveyor diameter, helicoid pitch, and conveyor incline angle. Optimal operation will depend strongly on the conveyed material, the RPM of the auger, and the filling degree of the system.

Installation and Maintenance of Tubular Screw Conveyor

Installing a screw conveyor can be complex and time-consuming. Because we have so much experience in this field, you can be sure that your new or modified system will be ready for use and fault-free immediately after installation. We can also support you with the maintenance of your machine, or carry out all the work for you.

Maintaining A Screw Conveyor
Screw conveyors are known to require relatively little maintenance. However, structural maintenance is required due to the mechanical stresses on the drive train and the (intermediate) bearings and seals. Badly maintained screw conveyors increase the chance of malfunctions, can cause unsafe situations and shorten the operational life of the machine. Structural maintenance prevents this.

Maintaining And Cleaning Your Screw Conveyors In-house
After the installation, would you prefer to carry out the maintenance or cleaning yourself, possibly with our guidance? As we know your custom-made screw conveyor inside out, we can assist you. Together with our experienced technician, you will work faster and be able to get back to work with a properly operational machine in no time at all. For in-house maintenance, simply follow the maintenance instructions supplied with your machine. Naturally, you are always welcome to contact us with questions or to order spare parts.

What Maintenance Can You Expect From Van Beek?
Our starting point is to provide quality maintenance to ensure a long service life and continuity. That's why we not only repair and replace necessary parts during a service, but you will also receive a report from us detailing your machine's status. We do this to prevent future problems such as breakdowns, damage or failure. Of course, it will always be your decision to assess the risks and whether or not to proceed with further repairs or replacement. We are happy to advise you on the best way forward.

Overhaul Or Maintenance During A Break In Production
Summer is always a very convenient period to carry out the maintenance and overhaul of your machines. Our service team is at your disposal 24/7 during this period. Please let us know about your production breaks in advance, so that we can prepare your service request in good time, and provide you with the best possible service.
Your screw conveyor is in safe hands
When you use our service, you can count on:
Smooth-running screw conveyors
Prolonged service life of your machines
Improved safety in the workplace

Our Factory

The enterprise took the lead in passing the ISO90001 quality management system certification in 2005, with strong technical force, rich manufacturing experience, mature manufacturing process, complete testing methods, all of which adopt CAD, which can fully meet the user's equipment modeling and non-standard design, and has a complete pre-sale and after-sales service system. The products are of high quality and low price, and are sold well in the mainland, Hong Kong, Macao and Taiwan, and are exported to Southeast Asia, Africa, Europe, America and other places, Welcome to visit, consult and negotiate with us.

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FAQ

Q: What are tubular screw conveyors used for?

A: Tubular screw conveyors are employed in various industries for transporting dry, free-flowing, and cohesive materials. They are commonly used in agriculture, food processing, chemical, pharmaceutical, construction, and waste management sectors for conveying items like grain, flour, seeds, pellets, powders, and small solid objects.

Q: How do tubular screw conveyors work?

A: Tubular screw conveyors consist of a helical screw or rotating blade within a cylindrical tube. As the screw turns, it moves the material along the conveyor's length. The material is pushed forward by the advancing blades and gravity, depending on the orientation of the conveyor.

Q: What are the advantages of using tubular screw conveyors?

A: The main advantages include their ability to handle a wide variety of materials, minimal dust generation, enclosed system preventing contamination, gentle handling of materials to reduce degradation, and the capability to convey materials over long distances with multiple inlets and outlets.

Q: What factors should be considered when selecting a tubular screw conveyor?

A: Important factors include the type and characteristics of the material being conveyed (e.g., granularity, moisture content, temperature), the conveyor's capacity, the desired length and angle of the conveyor, the environment in which the conveyor will operate, and any regulatory standards that must be adhered to.

Q: Are there different types of screw conveyors?

A: Yes, there are several types of screw conveyors, including horizontal, vertical, inclined, shaftless, and flexible designs. Each type is suited for specific applications depending on the direction and angle of material movement required.

Q: What maintenance is required for tubular screw conveyors?

A: Regular maintenance is crucial for ensuring the longevity and efficiency of tubular screw conveyors. This includes checking and replacing worn screw blades, inspecting bearings and seals for signs of wear or damage, maintaining lubrication, and ensuring that all fasteners are tight and secure.

Q: Can tubular screw conveyors be customized?

A: Tubular screw conveyors can indeed be customized to meet specific requirements. Customizations can include variations in the diameter of the tube, pitch and width of the screw blade, drive power, and the inclusion of features like inspection ports, loading and unloading hatches, and interlocks for safety.

Q: What is the troughing angle of a conveyor?

A: The standard trough angles in Europe are 20, 30, and 40 degrees; in North America, trough angles of 20, 35, and 45 degrees are common. However, with an ever-increasing global economy, one might find conveyors of any trough angle in any location around the world.

Q: What is the difference between a screw conveyor and an auger?

A: Inclined screw conveyors are functionally the same as most augers but are used at an incline between 0-45 degrees from horizontal. They perform much differently however, as each degree of incline reduces the efficiency of the conveyor and how much material flows through it.

Q: What is the cheapest type of conveyor?

A: Also one of the simplest types, they are very affordable. A series of rollers mounted on a side frame provides the rolling surface. When mounted on a decline angle, parts move by themselves.

Q: What is the most common type of conveyor?

A: Arguably, the most common type of conveyor system, the conveyor belt for a warehouse, has found its rightful place in practically every industry. The conveyor belt for food comes with pulleys (two or more) and a closed loop (the conveyor belt) that rotates around them.

Q: What is the best material for a screw conveyor?

A: Carbon Steel
Screw conveyors made of carbon steel are the most common, and are used for applications where the product or bulk material to be handled presents normal working conditions, there is no humidity, it is not corrosive, it is not abrasive, it is not for handling. Made of food grade materials, they do not degrade.

Q: What is the difference between a screw conveyor and a bucket conveyor?

A: Screw conveyors and bucket elevators are used to convey materials including peanuts, soybeans or cottonseeds etc. The screw conveyor consists of screw wring, delivery pipe, feed hopper and tension drive system. The bucket elevator consists of the bucket, traction part, drive device and tension station.

Q: How do screw conveyors operate?

A: The Screw Conveyor's Operation Is Simple:The motor drives the helix, and as it rotates, the material is moved along the screw's length and discharged at the end. The pitch of the screw, rotation speed, and screw diameter can be adjusted to optimize the conveyor's performance for various materials and applications.

Q: Can screw conveyors handle abrasive materials?

A: Yes, Screw Conveyors can be designed with wear-resistant materials or special coatings to withstand the abrasion caused by materials with abrasive characteristics.

Q: Can screw conveyors be used for both horizontal and inclined conveying?

A: Yes, screw conveyors can be used for both horizontal and inclined conveying. The conveying direction is determined by the rotation direction of the screw conveyor. If the rotation direction is clockwise, the material will be conveyed in the horizontal direction; if the rotation direction is counterclockwise, the material will be conveyed in the upward direction.

Q: What is the most common type of conveyor?

Q: What controls the speed of a conveyor belt?

A: Motor Drives: Motor drives control the speed and direction of the conveyor belt. They receive commands from the PLC to adjust the conveyor's movement as required. Emergency stop systems: Safety is a critical aspect of conveyor control systems.

Q: 19What are the advantages of belt conveyor?

A: It is one of the cheapest ways to move material long distances.
There is virtually no degradation of your product caused by conveying.
The conveyor can have changes in elevation.
The material can be visible on the belt while being conveyed.
Belts can be loaded virtually any place along the belt.

Q: How thick is conveyor belt rubber?

A: Widths: Our stocked widths range from 350mm up to 2400mm without longitudinal joints.

Cover Thicknesses:Our stocked thicknesses range from 1.5mm to 21mm top cover and 1.5mm to 7mm bottom cover. Nb. Higher widths and cover thicknesses can be produced on request.

Not finding the right fit for easy cleaning? Need an accessible, U-shaped design for horizontal powder handling? View our Trough Screw Conveyors for multi-point discharge and easy maintenance solutions.

We're professional tubular screw conveyor manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to buy high-grade tubular screw conveyor for sale here from our factory. Good service and low price are available.

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