Worm Conveyor

What is Worm Conveyor?

Worm conveyor, also called worm screw conveyor, is a mechanical device used to transport a variety of materials, including solids, powders, and granular matter. It consists of a spiral blade (called a worm) contained in a tube or trough. The rotation of the worm in the tube moves the material along the conveyor.

Worm conveyors are commonly used to transport granular or powdered materials such as biomass, coal, gravel, slag, sand, gypsum, coal powder, ash, alternative fuels, and high-temperature materials. They are efficient, reliable, and can be designed to meet specific material handling requirements. The main materials of worm conveyors include stainless steel, carbon steel, and plastic. The screw diameter is usually between 113mm and 600mm. The conveying angle generally ranges from 0 to 90 degrees. Special designs can include heating/cooling functions, anti-stick coatings, and adjustable speed functions to meet different material conveying needs.

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Technical Parameters of Worm Conveyor

Model		Diameter (mm)	Pitch (mm)	Rotating speed (r/min)	Capacity (m³/h)	Rotating speed (r/min)	Capacity (m³/h)	Rotating speed (r/min)	Capacity (m³/h)	Rotating speed (r/min)	Capacity (m³/h)
Small	100	100	100	140	2.2	112	1.7	90	1.4	71	1.1
	125	125	125	125	3.8	100	3	80	2.4	63	1.9
	160	160	160	112	7.1	90	5.7	71	4.5	56	3.6
	200	200	200	100	12.4	80	9.9	63	7.8	50	6.2
Small	250	250	250	90	21.8	71	17.2	56	13.6	45	10.9
	315	315	315	80	38.8	63	30.5	50	24.2	40	13.4
	400	400	355	71	62.5	56	49.3	45	38.6	36	31.7
Large	500	500	400	63	97.7	50	77.6	40	62	32	49.6
	630	630	450	50	138.5	40	110.8	32	88.6	25	69.3
	800	800	500	40	198.5	32	158.8	25	124.1	20	99.3

Customized Product

Worm conveyors can be classified and customized according to different characteristics and application requirements. Here are several common worm conveyor types:

Double worm conveyor: Double worm conveyor refers to the installation of two spiral blades in a pipe, which work in opposite directions of rotation. This design can achieve higher conveying capacity and more uniform material mixing, and is suitable for applications requiring larger throughput and mixing effects.

Water-cooled worm conveyor: Water-cooled worm conveyor is a conveyor with cooling water pipes installed inside the spiral blades and conveying pipes. It is usually used to handle high-temperature materials or when the temperature of the materials needs to be reduced. The circulating cooling water can effectively reduce the material temperature and prevent the deterioration or damage of heat-sensitive materials.

Variable frequency worm conveyor: Variable frequency worm conveyor is a type that uses a frequency converter to control the speed and delivery volume of the worm conveyor. By adjusting the speed, precise control and adjustment of the conveying volume can be achieved to adapt to different materials and process requirements. Variable frequency worm conveyors are often used in applications that require flexible adjustment of conveying volume, such as batching, weighing and mixing processes.

Structure of Worm Conveyor

Worm conveyors, also known as screw conveyors, consist of several key parts that work together to efficiently move material. Here are the main components:

Trough: The trough is a long, U-shaped channel that holds the material being conveyed. It can be made from various materials like steel, stainless steel, or even plastics depending on the application and the material being handled.

Screw (Flighting): This is the helical shaft with a wound ribbon around it, like a giant screw. The rotation of the screw creates a pushing action that moves the material forward through the trough. The flighting can be made in different designs, depending on the material being conveyed.

Shaft: The central solid rod that runs through the center of the trough and supports the screw. It transmits the torque from the motor to rotate the screw.

Hanger Bearings: These bearings support the screw shaft along the length of the trough. They are typically mounted on brackets that are welded or bolted to the trough exterior.

Drive System: This is the motor and gearbox assembly that provides the power to rotate the screw shaft. The motor selection will depend on the capacity and material the conveyor needs to handle.

Inlet and Outlet: The inlet is the opening at one end of the trough where the material enters the conveyor. The outlet is the opening at the other end where the material exits the conveyor. These openings can be flanged for easy connection to other equipment.

Factors Should Be Considered When Delecting Worm Conveyor

1.Material properties:

Particle size and shape: The particle size determines the size of the spiral blade gap. Variable pitch spirals can be used to handle irregular shaped materials.

Density: Adjust the spiral diameter to adapt to materials of different densities.

Viscosity: Choose a variable pitch spiral or add agitator blades to improve the fluidity of viscous materials.

Abrasiveness and corrosion: Use wear-resistant or corrosion-resistant materials, such as alloy steel and stainless steel, to deal with abrasive or corrosive materials.

Temperature: Use high temperature resistant materials, such as high temperature alloy steel, to handle high temperature materials.

2.Material selection:

Low carbon steel: Suitable for general conveying applications.

Stainless steel (304 and 316 grades): Has corrosion and wear resistance.

3.Other influencing factors:

Conveying capacity: Select the spiral diameter according to needs.

Conveying distance: For long-distance conveying, consider multi-section spirals or support designs.

Conveying height: Adjust the angle of the spiral blades to ensure stable vertical conveying.

Working environment: Consider environmental factors to select appropriate sealing and protection measures.

Application of Worm Conveyor

Worm conveyors provide versatile and efficient solutions for material handling in various industries. The specific application depends on the type of material being moved and the application requirements:

Food Processing: Typically used in the food processing industry for conveying materials such as flour, sugar, grains and other food products.

Agriculture: Used in agriculture to transport materials such as seeds, fertilizers and animal feed.

Chemical Processing: Used in the chemical processing industry to convey materials such as powders, granules, and other chemicals.

Manufacturing: Used in manufacturing to move materials such as plastics, rubber, and other materials used in the production process.

Mining industry: used to transport materials such as coal, ore and other minerals.

Waste Management: Used to move materials such as trash, recycled materials and other waste products.

Water Treatment: Used to transport materials such as sludge, sediment and other waste.

Proof of Solutions for Our Wide Range of Products

Worm Conveyor Manufacturers

Dahan worm conveyor manufacturers are aimed at the long-distance and high-level conveying and lifting of powdery, granular, blocky and other materials, and can be configured on various production lines, such as: mixing stations, flour mills, powdered food packaging factories and other industries.

Provide free test machine service to ensure that the product can achieve the delivery effect that users want, and also provide high-definition material test machine video. If the test machine video you want is not available in our manufacturer, you can also mail the material to our factory The postage can be reimbursed and the video will be sent to you.