Square vibrating screen is usually used for screening and grading granular materials. Its screen surface is square, and materials of different particle sizes are classified through vibration. Compared to traditional circular vibrating screens, square vibrating screens have the advantages of high screening accuracy, large processing capacity, and simple structure. Square vibrating screens are widely used in industries such as chemical, food, pharmaceutical, metallurgical, mining, and building materials. In the food industry, square vibrating screens are commonly used for screening and grading powdered or granular food ingredients, food additives, seasonings, etc. In the mining industry, square vibrating screens can be used to screen various ores. In the building materials industry, square vibrating screens are used to screen raw materials such as limestone, gypsum, coal ash, and cement.
Main components of square vibrating screen
♦ Screen box: The main body of a square vibrating screen is usually made of a square structure, made of metal or alloy materials, and has sufficient strength and rigidity to support the operation of the entire equipment. There are two types of sieve boxes: fixed and movable, which can change the inclination angle of the sieve box.
♦ Screen: The screen is a key component of the square vibrating screen, located inside the screen box. It is usually made of metal wire, synthetic fiber or other wear-resistant materials, with different pore sizes and hole patterns to meet the screening needs of different materials. There are two types of sieve screens: coarse sieve and fine sieve, and different sieve frames can be selected according to different requirements.
♦ Vibration source: The vibration source is the power source of the square vibrating screen, usually using a motor-driven vibrator or vibration motor. The vibration force generated by the vibration source is transmitted to the sieve box and screen mesh through a vibrator or vibration motor, causing them to vibrate. The intensity and frequency of the vibration force can be adjusted to meet the screening needs of different materials.
♦ Feeding device: The feeding device is used to introduce the material to be screened into the screening box. The feeding device can be a simple feeding port or pipeline, or a vibrating feeder, spiral feeder, etc., to ensure that the material is evenly distributed on the screen and achieve a more effective screening process.
♦ Discharge device: The discharge device is used to collect or guide the screened materials separately to the corresponding discharge ports or collectors. The design of the discharge device is determined based on the screening results and material processing requirements to ensure the smooth discharge and graded collection of materials.
♦ Vibration damping spring: installed between the vibration motor and the screen box, it has a shock-absorbing effect, making the vibration screen stable and reliable during operation.
Working principle of square vibrating screen
The square vibrating screen uses the vibration force generated by the vibration motor to cause the material inside the screen box to vibrate on the screen mesh, achieving the screening, grading, and separation of granular materials. Specifically, the vibration force causes the sieve box and screen mesh to vibrate, and the material moves and layers on the screen mesh under the action of vibration. Smaller particles can pass through the pores of the sieve and fall into the collector or discharge outlet below, while larger particles are blocked on the sieve.