Worm Screw Conveyor

Commonly used in agriculture, food processing, mining and other industries that need to transport bulk materials over short distances, their ability to move material at a controlled speed makes them useful for batching and metering applications.

Screw Diameter: 100-1250(mm)

Delivery volume: 1.2~458(m3/h)

Conveying Length: 2-70(m)

Material: carbon steel, stainless steel (food, pharmaceutical industry professional, plastic (corrosion resistance)

Angle: horizontal, oblique, vertical

Application: Suitable for conveying powdery, granular and small block products, such as cement, fertilizer, coal powder, grain, flour, stone, etc.

Introduction of Worm Screw Conveyor

Worm screw conveyor, also called a worm conveyor or worm auger, is a mechanical device used to transport bulk materials such as grain, pellets, powder, and other granular or powdery materials. It consists of a helical screw blade, known as a worm or auger, which rotates inside a trough or casing.

Worm screw conveyors can be designed to operate in various orientations, including horizontal, inclined, and vertical, depending on the application's specific requirements. They can also be customized to handle a wide range of materials, including abrasive and corrosive substances, and can be constructed from various materials, including stainless steel, carbon steel, and plastic.

When it is working, the motor drives the rotating spiral blade to transport the material, so that the force of the material not rotating together with the worm screw conveyor blade is the weight of the material itself and the friction resistance of the screw conveyor cabinet to the material. Under the drag of the screw shaft, the material moves in the direction of the discharge port, and then transported to the bunker.

Types of worm screw conveyor

Horizontal type: horizontal arrangement, suitable for conveying within 40 meters, multi-point feeding, multi-point unloading.

Inclined type: the inclined angle is 20°-60°, and the conveying length does not exceed 20 meters.

Vertical type: suitable for vertically conveying materials, conveying powdery or granular materials from low to high, the vertical lifting height does not exceed 8 meters, and the feeding volume does not exceed 50 tons.

Types of Screw Conveyors "Worm"

Stainless steel material: 304/316L stainless steel, hygienic, rust-free, acid and alkali resistant, suitable for transportation of food, medicine or corrosive chemical materials with high hygiene requirements.

Carbon steel material: lower price, suitable for material conveying without special requirements.

Shafted design: used for conveying loose, dry, and fluid bulk materials.

Shaftless design: It is used for conveying viscous, wet, and poor fluid mass and belt materials.

Single Worm: conventional Worm form, used for material conveying

Double Worm: It is 1.5-2 times the conveying capacity of a single Worm, and has the functions of stirring and breaking at the same time.

Specially designed "Worm" application advantages

Shaftless Worm

The design without a central shaft not only reduces the possibility of blockage when conveying viscous, strip-shaped and easy-to-wind materials, but also increases the effective conveying space in the conveyor, which can improve the conveying capacity of the machine to a certain extent.

In practical applications, Shaftless Worm is usually used in the recycling of domestic waste and industrial medical waste; sludge treated by filter presses; food residue treatment in the food processing industry and other scenarios.

Worm with dual axis design

Compared with the conventional Worm Screw Conveyor, there are two Worms in the same direction and reverse rotation in the pipe tank, which not only increases the space of the pipe tank to improve the conveying capacity, but also has a certain ability of stirring, mixing and breaking up agglomerates. At the same time, when facing materials that are not easy to flow, it can play a very good role in pushing the materials forward.

The structure closely related to the Worm Screw Conveyor is the spiral blade. Different blade forms have different effects and uses. If you are interested in learning more, please click:

Beatures and Benefits

Long conveying length - up to 60 meters in horizontal and slight incline lengths, 30-40 meters in higher incline lengths, and up to 8 meters in vertical lift height.

Flexible layout - it can be arranged on elevated, ground or pit, can be installed horizontally or on a slope (≤15°), or can be installed horizontally and on a slope with the same machine

The feeding amount can be adjusted - the feeding is uniform, the feeding speed can be controlled by installing a frequency conversion motor, and the material is not easy to be blocked.

Easy to clean - the entire Worm Screw Conveyor is designed to be easily disassembled, without structural dead ends, and can easily clean the corners inside the machine.

Hygienic and pollution-free - The silo and conveying pipe are made of stainless steel (materials can be requested by customers) to ensure that the raw materials are completely pollution-free during the conveying process.

Totally enclosed structure - The conveying pipeline adopts a closed design, which can effectively prevent dust and effectively isolate materials with high hygiene requirements or strong odor.

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Technical parameters

Here are different models of worm screw conveyors for you to choose from. If you have special needs, we will design them free of charge according to your actual situation.

Specification		Technical performance	Drive	Drive			Weight (kg)
Diameter	Length (m)	Output (t/h>	Speed (min)	Reducer		Electric motor
Diameter	Length (m)	Output (t/h>	Speed (min)	Model	Speed ratio	Power(kw)
U 200	-10	9	60	ZQ250	23.34	1.1	726
U 200	-20	9	60	ZQ250	23.34	1.5	1258
U 250	-10	15.6	60	ZQ250	23.34	2.2	960
U 250	-20	15.6	60	ZQ250	23.34	3	1750
U 300	-10	21.2	60	ZQ350	23.34	3	1373
U 300	-20	21.2	60	ZQ350	23.34	4	2346
U 400	-10	51	60	ZQ400	23.34	5.5	1911
U 400	-20	51	60	ZQ500	23.34	11	2049
U 500	-10	87.5	60	ZQ400	23.34	7.5	2381
U 500	-20	87.5	60	ZQ650	23.34	18.5	5389
U 600	-10	134.2	45	ZQ750	23.34	22	3880
U 600	-10	134.2	45	ZQ850	23.34	55	7090

Structure of Worm Screw Conveyor

Worm screw conveyor structure

Worm screw conveyor is mainly composed of driving device, machine head assembly, screw shaft, groove lining plate, feeding port, discharging port, cover plate (when necessary), base and so on.

Driving device: adopt helical gear reducer. When it is horizontal, the reducer is opposite to the outlet, and when it is inclined, the reducer is at the outlet.

Slot: U-shaped, with a rain cover on the upper part. Material is stainless steel or carbon steel.

Non-axial helix: stainless steel or 16Mn.

Tank Liner: Nylon or polyethylene board, nylon material.

Inlet and outlet: There are two kinds of square and round. Generally, the form of water inlet and outlet is determined by the user, mainly square.

Worm screw conveyor parts

Layout of Worm Screw Conveyor

1、The arrangement of the inlet and outlet of the Worm screw fedder

The inlet and outlet of the Worm Screw Conveyor are designed according to the layout of the existing feeding device in the user's factory. The most common design of the Worm Screw Conveyor is a single inlet and outlet or multiple inlets and outlets. The screw is designed as a whole, and the direction of rotation unanimous.

Worm Screw Conveyor can be designed with coaxial bi-directional double inlet and single outlet according to the actual layout (the inlet is at both ends of the conveyor, and the outlet is in the middle of the conveyor), and the relative rotation of the worm will be fed by the inlet on both sides. The incoming materials are transported to the middle outlet for delivery. Of course, it is also possible to design the feed inlet in the middle of the screw, and the reversely conveyed screw can simultaneously transport the material to the discharge ports at both ends of the conveyor.

2. Worm screw fedder installation form

different layout

Horizontal conveying (ground): The most common form of conveying, which can be closed or open.

Horizontal conveying (suspension): It can be suspended at the bottom or roof of the elevated structure to coordinate with production. For the consideration of transportation safety and the bearing capacity of the suspension surface, only small-scale equipment is usually used for suspension installation.

Inclined conveying (mobile or fixed): In order to avoid the exponential decline of the conveying volume, the conveying angle is usually designed below 30°. According to whether the actual conveying site changes frequently, choose fixed conveying or mobile conveying.

Can provide hanging type, ground and hanging mixed fixed inclined type, mobile type (can be rotated around the axis of the feed port) and other special installation methods according to user requirements.

Application

Worm screw conveyors are divided into two types: shafted and shaftless. The shafted screw conveyor is suitable for non-viscous dry powder materials and small granular materials. (For example: cement, fly ash, lime, grain, etc.) The shaft screw conveyor is suitable for conveying materials that are viscous and easily entangled. (For example: sludge, biomass, garbage, etc., the screw conveyor is a kind of conveying equipment with strong sealing performance and good environmental protection performance. The use of fully enclosed conveying and easy-to-clean screw surfaces can ensure environmental sanitation and the delivered materials are not Contaminated and not leaking.

Customer case

Solutions by Industry

1. Conveying the sludge after pressing and filtering

Recommended product: Shaftless Worm Screw Conveyor

Features: There is no central axis to interfere with larger conveying space, avoiding sticky sludge from clogging conveying pipes.

2. Transport domestic or industrial waste

Recommended product: Shaftless Worm Screw Conveyor

Features: There are usually many fabrics or strips in the garbage, which are easy to cause entanglement. The shaftless design reduces the possibility of clogging caused by garbage entanglement.

3. Transport food

Recommended product: Stainless Steel Worm Screw Conveyor

Features: 304 stainless steel for food is safe and harmless, meets the hygienic standards of food production utensils, and is smooth enough for easy cleaning.

If you have other needs, please consult us, we are happy to help you!