RU110661U1 - DEVICE FOR GRINDING AND CLASSIFICATION OF MATERIALS - Google Patents

Abstract

 A device for grinding and classifying materials, comprising a housing, an unloading channel, coupled to a centrifugal classifier in the form of an impeller with blades and a rotor with a drive, characterized in that the rotor blades of the centrifugal classifier have an inclination both in the direction of rotation of the rotor and in the opposite direction, the plane of any of the blades does not coincide with the axis of rotation of the rotor of the centrifugal classifier; one end of the pipe forming the discharge channel of the thin product is immersed in the rotor of the centrifugal classifier, and the other end of the pipe is withdrawn from the device body, in addition, the outlet of the output of the thin product is located on the side of the device body, opposite the installation location of the rotor drive of the centrifugal classifier.

Description

The utility model relates to equipment for grinding and classification of various types of materials and can be used in construction, chemical, woodworking and other industries.

A device for drying and grinding sawdust (See patent on PM No. 66232, IPC 21/00), including a bed, an activation chamber, a channel for supplying hot air, a channel for loading wet sawdust, a channel for unloading and a drive, is known. The discharge channel is equipped with a centrifugal classifier in the form of an impeller with radially directed blades. The plane of each blade coincides with the axis of rotation of the classifier.

The disadvantage of this device is the low degree of separation of the small class from the large. This is due to the fact that with a radial arrangement of the rotor blades of the centrifugal classifier, the thin product is contaminated with large particles thrown into the free space between the rotor blades.

Closest to the claimed technical solution is a device for grinding and drying wood chips and sawdust (See patent for PM No. 87368, IPC V02C 21/00), including a bed, an activation chamber with feed channels for loading wet wood chips and sawdust brought to it, a channel the flow of hot air and the discharge channel with a classifier, mounted directly on the shaft of the electric drive. The discharge channel is adjacent to the classifier at the mounting location of the drive of the latter.

The disadvantage of this device is also the low efficiency of particle classification. Large particles can enter the thin product at the interface between the discharge channel and the rotor of the centrifugal classifier.

The technical task of the claimed device is to increase the classification efficiency of particles of the crushed material according to their size.

The stated technical problem is achieved in that in a device for grinding and classifying materials, including a housing, an unloading channel, coupled to a centrifugal classifier in the form of an impeller with radially directed blades and a rotor with a drive, the rotor blades of the centrifugal classifier can have an inclination, as in the direction of rotation of the rotor , and in the opposite direction, and the plane of any of the blades does not coincide with the axis of rotation of the rotor of the centrifugal classifier, one end of the pipe forming the channel manual ultrasonic inspection thin product is immersed in a rotor of a centrifugal classifier, and the other end of the tube removed from the device body, in addition a thin product output opening disposed on the side of the enclosure opposite to the rotor drive installation centrifugal classifier.

The inclination of the rotor blades of the centrifugal classifier in either side allows you to reduce or completely block the free space between the blades, thereby eliminating the possibility of contamination of the thin product by large particles.

Improving the classification efficiency of material particles according to their size is achieved by the fact that one end of the pipe forming the channel for unloading the thin product is immersed in the rotor of the centrifugal classifier, and the other is withdrawn from the device’s casing, while the outlet of the output of the thin product is located on the side of the casing opposite to the installation location of the drive centrifugal classifier rotor.

The inventive device is illustrated by drawings.

Figure 1 shows a General view of the device for grinding and classification of materials in section.

Figure 2 shows a General view of the rotor of the centrifugal classifier with inclined blades, the plane of which does not coincide with the axis of rotation of the rotor.

A device for grinding and classifying materials consists of a housing 1, a rotor of a centrifugal classifier 2, including a disk 8 and a ring 9, with inclined blades 3 mounted on it, a grinding rotor 4 with shock elements 5 mounted on it, a loading channel 6 to be ground, output channel of the thin product 7.

The device operates as follows. The material to be crushed through the feed channel 6 enters the housing 1 into the zone of operation of the grinding rotor 4. After contact with the shock elements 5 of the grinding rotor 4, particles of material are thrown towards the rotor of the centrifugal classifier 2. When the rotor of the centrifugal classifier 2 is rotated, large particles of material are discarded inclined blades 3, which are installed between the disk 8 and the ring 9. Due to the inclination of the blades 3, the free space between them is blocked, which eliminates the casting of large parts particles in the fine product outlet duct. Particles whose dimensions are smaller than the separation boundary pass between the inclined blades 3 of the rotating rotor of the centrifugal classifier 2 and are removed from the housing 1 through the outlet channel of the thin product 7.

The separation boundary, and hence the fineness of the obtained product, is controlled by changing the rotational speed of the rotor of the centrifugal classifier 2. Increasing the rotational speed of the rotor of the centrifugal classifier 2 allows you to get a finer product, reducing the frequency is more coarse.

To prevent the passage of large particles at the junction of the rotor of the centrifugal classifier 2 with the output channel of the thin product 7, one end of the pipe is immersed in the rotor of the centrifugal classifier 2, which prevents particles of the crushed material from entering the output channel of the thin product 7, bypassing the inclined blades 3 of the rotor centrifugal classifier 2.

The proposed design of a device for grinding and classification of materials provides a technical problem - increasing the efficiency of the classification of particles of ground material according to their size.

Claims (1)

A device for grinding and classifying materials, comprising a housing, an unloading channel, coupled to a centrifugal classifier in the form of an impeller with blades and a rotor with a drive, characterized in that the rotor blades of the centrifugal classifier have an inclination both in the direction of rotation of the rotor and in the opposite direction, the plane of any of the blades does not coincide with the axis of rotation of the rotor of the centrifugal classifier; one end of the pipe forming the discharge channel of the thin product is immersed in the rotor of the centrifugal classifier, and the other end of the pipe is withdrawn from the device body, in addition, the outlet of the output of the thin product is located on the side of the device body, opposite the installation location of the rotor drive of the centrifugal classifier.