1. According to the material, they are divided into rubber rollers, ceramic rollers, nylon rollers and insulated rollers.

2. Mainly include trough roller sets, various parallel roller sets, various self-aligning roller sets, and various buffer roller sets.

(1) Troughed rollers include ordinary rollers, forward tilt rollers, quick-change bearing rollers, hanging rollers, three-chain rollers, reversible rollers, and variable trough rollers. Angle rollers, transitional rollers, V-shaped rollers, etc.;

(2) Parallel rollers include ordinary rollers, comb-type rollers, forward-inclined rollers, and steel rubber-type rollers. rollers, spiral rollers, etc.;

(3) Aligning rollers include general-purpose, friction-reversible rollers, powerful rollers, tapered rollers, spiral rollers, and combined rollers etc.;

(4) Buffer rollers include spring plate type rollers, buffer ring type rollers, strong buffer type rollers, adjustable elastic type rollers, hanging type rollers, etc.; Nylon rollers Roller: low friction coefficient, wear-resistant, not easy to damage the belt. It has excellent self-lubricating properties. During use, it can operate in harsh environmental conditions without the need for oil injection. It is not easy to get stuck and has good anti-magnetic properties. It has strong corrosion resistance and aging resistance, is resistant to corrosion by weak acids, weak alkali and organic solvents, is non-toxic and non-polluting, and can withstand repeated impacts and vibrations. The nylon roller itself is light in weight, only one-third of the metal parts. It is easy to install, has low maintenance rate, low noise, smooth operation, energy saving, and can extend the service life. The nylon roller is dust-proof and has good waterproof performance. It can be used in environments with a lot of dust. When used, it is not easy to get water. The nylon rollers produced by Yima Rollers have complete specifications and models, and can produce diameters, lengths, and special specifications can be customized on demand.

Features of nylon rollers:

1. Nylon rollers have extremely high wear resistance, extremely low friction coefficient, and are not easy to wear belts;

2 , Nylon rollers have excellent self-lubricating properties, do not require oil injection, and are not easy to get stuck when used under harsh conditions;

3. Nylon rollers have anti-static, anti-smoldering, aging resistance, and chemical resistance ( Corrosion by acids, alkalis and organic solvents;

4. Can withstand repeated impacts and vibrations;

5. The ambient temperature range of nylon rollers is: -40℃～80℃ ;

6. Excellent mechanical properties, light weight, easy installation, no maintenance required;

7. Nylon roller has low noise (3-7DB), smooth operation and long life (it is metal 3-5 times the life of the roller) Performance characteristics of the grooved roller:

1. The grooved roller has the characteristics of corrosion resistance: it is difficult for acid, alkali and salt to corrode it.

2． The grooved roller has strong hardness: strong wear resistance.

3. Good sealing: the trough roller is fully sealed, and plastic labyrinth seals are installed at both ends. The oil and grease will not leak, which can keep the rolling shaft for a long time; the trough roller operates in a fully sealed state.

4． The ceramic surface of the grooved roller: forms an oxide film, the surface is smooth, does not adhere to materials, and has a small friction coefficient in contact with the conveyor belt, which reduces the hoisting driving force.

5. Troughed rollers have a long service life: Troughed rollers last 2-5 times longer than steel rollers, and can reduce belt wear, prevent the belt from running away, and extend the service life of the belt.

6． Low operating costs: Troughed rollers can reduce the overall cost of the belt conveyor and reduce maintenance hours.

Troughed rollers are widely used in open-air dusty and highly corrosive environments, such as mines, power plants, steel plants, stone factories, cement plants, coal washing plants, salt plants, alkali plants, chemical fertilizers Troughed rollers are often used in all transportation places such as factories and docks. Buffer idler (impact idler) is a type of idler developed mainly for corrosive environments such as coal washing plants, coking plants, chemical plants, etc. , its toughness is more than 10 times that of ordinary metals, its lifespan is five times that of traditional column shoes, it is corrosion-resistant and flame-retardant, anti-static, and light in weight. It is widely used in mining. The special polymer material for the roller body has mechanical properties similar to bronze, has good wear resistance, and has good self-lubricating properties without damaging the belt. The buffer roller has excellent anti-corrosion performance. The roller body and seals are made of polymer materials and are corrosion-resistant.

When used in corrosive situations, the service life can reach more than 5 times that of ordinary rollers.

The buffer roller is light in weight and has small rotational inertia. Special polymer materials for rollers are light in weight, with a specific gravity one-seventh that of steel. The weight of rollers made of this material is about one-half that of ordinary rollers, and their rotational inertia is small. The friction is small.

The buffer rollers are installed below the material receiving section of the conveyor to reduce the impact of the material on the conveyor belt during blanking and to extend the service life of the conveyor belt. The spacing between buffer rollers is generally 100-600 mm.

In terms of installation of buffer rollers, one is to increase the density of installation; the other is to check frequently and replace damaged rollers in time. For conveyor belts with large blanking height, it is recommended to install a buffer air lock and replace the buffer rollers with buffer beds. In terms of purchasing, based on the characteristics of the buffer roller, the following points are put forward: roller radial runout, roller flexibility, axial movement, roller dustproof performance, waterproof performance, roller axial load-bearing performance, Impact resistance of rollers, etc.

(1) Temperature protection of buffer rollers

When the friction between the belt conveyor roller and the belt causes the temperature to exceed the limit, the detection device installed close to the roller sends an over-temperature signal, and the receiver After receiving the signal, after a 3s delay, some actions are performed, the power supply to the motor is cut off, and the conveyor automatically stops to protect the temperature.

(2) Speed ??protection of roller group

If the conveyor fails, such as the motor burns out, the mechanical transmission part is damaged, the belt or chain breaks, the belt slips, etc., install it on the conveyor The magnetic switch in the accident sensor SG on the passive parts of the machine cannot be closed or cannot be closed at normal speed. At this time, the control system will act according to the inverse time limit characteristic. After a certain delay, the speed protection circuit will take effect, causing the execution part to move and cut off the motor. power supply to avoid accident expansion.

(3) Coal level protection of buffer roller coal bunker

There are two coal level electrodes, high and low, in the coal bunker. When the coal bunker cannot put coal because there is no empty truck, the coal level will Gradually rise. When the coal level rises to the high electrode, the coal level protection will take action. Starting from the first belt conveyor, each conveyor will stop in sequence due to the pile of coal at the rear of the machine.