RU90426U1 - GATEWAY FEEDER - Google Patents

Abstract

1. A gateway feeder comprising a housing with loading and unloading nozzles, as well as a rotor with radial blades forming cells, characterized in that the blades or rotor together with the blades are made of elastic material with the ability to restore the original shape, the diameter of the rotor with blades is larger the inner diameter of the housing of the lock feeder, and the rotor blades are bent back relative to the direction of rotation of the rotor. ! 2. The gateway feeder according to claim 1, characterized in that polyurethane can serve as an elastic material with the ability to restore its original shape.

Description

The utility model relates to pneumatic transport and can be used to supply bulk materials to the pipeline pneumatic conveying installations.

Known joint feeder (See PM No. 31377, MKI B65G 53/46, 2003), including a lock feeder having a housing with loading and unloading holes with a rotor rotating in it, on which are mounted radially arranged blades equipped with sealing devices that interact with the working surface of the housing. An ejector feeder is attached to the discharge opening of the gateway feeder from below, due to which the static air pressure is reduced, the total pressure drop across the gateway feeder is reduced, air leakage through the leakage of the gateway feeder is reduced, as a result of which its tightness increases.

The disadvantage of this device is poor sealing of the rotating blades relative to the inner surface of the housing of the feeder. Wear of sealing devices is not compensated automatically, due to which the feeder’s tightness is violated during operation, unproductive leaks appear, air breaks into the feed hopper, which disrupts the normal operation of the feeder and worsens working conditions.

A lock feeder for pneumatic conveying of bulk materials is also known (see USSR author's certificate No. 816911, MKI B65G 53/46, 1981), comprising a housing with loading, unloading and air supply pipes, side covers and a rotor with blades forming cells installed in the housing. In this case, the rotor blades are made with beveled edges and each of them is equipped with clamping bars mounted on its edges for fastening the sealing plates. The clamping strips are made with a cutting edge.

The disadvantage of this device is the high complexity of the manufacture of the rotor, the difficulty of replacing the sealing pads, the short shelf life of the shutter.

The technical task of the proposed utility model is to increase the tightness of the airlock feeder by maintaining a constant force of pressing the blades to the inner surface of the body of the airlock feeder and automatically compensate for their wear. The technical result is achieved in that in a lock feeder containing a housing with loading and unloading nozzles, as well as a rotor with radial blades forming cells, blades, or the rotor together with the blades are made of elastic material with the ability to restore its original shape, and the rotor diameter with blades larger than the inner diameter of the lock gate housing, and the rotor blades bent back relative to the direction of rotation of the rotor. Polyurethane can serve as an elastic material with the ability to restore its original shape.

Since the rotor diameter is larger than the inner diameter of the lock feeder housing, when the rotor is installed, its blades are bent in the opposite direction to the rotor rotation, due to the fact that they are made of elastic material with the ability to restore its original shape (for example, polyurethane). the wear of the blades are straightened, providing a constant clamping force to the inner surface of the housing, and therefore, maintaining the tightness of the feeder for the entire life of the elastic rotor.

Thus, the air tightness of the gateway feeder is maintained automatically for the entire life of the rotor, until the blades are completely straightened.

Figure 1 shows a rotor with radial blades in a straightened position;

Figure 2 shows a section of a gateway feeder with an installed rotor.

The lock feeder comprises a housing 1 with loading 2 and unloading 3 pipes. A drive rotor 4 with cell-forming blades 5 made of an elastic material having the ability to restore its original shape with the blades bent backward relative to the direction of rotation of the rotor blades is installed in the housing. The diameter of the rotor 4 with the blades 5 is larger than the inner diameter of the housing 1 of the lock feeder.

The device operates as follows.

The transported bulk material flows through the loading pipe 2 into the cells of the rotor 4. When the rotor 4 is continuously rotated, the filled cell moves to the loading zone. When combining the cell with the discharge pipe 3, the material is unloaded from the cell. Thus, as the blades wear, they straighten, providing a constant clamping force to the inner surface of the housing, and therefore, maintaining the tightness of the feeder for the entire life of the elastic rotor.

Claims (2)

1. A gateway feeder comprising a housing with loading and unloading nozzles, as well as a rotor with radial blades forming cells, characterized in that the blades or rotor together with the blades are made of elastic material with the ability to restore the original shape, the diameter of the rotor with blades is larger the inner diameter of the housing of the lock feeder, and the rotor blades are bent back relative to the direction of rotation of the rotor. 2. The gateway feeder according to claim 1, characterized in that polyurethane can serve as an elastic material with the ability to restore its original shape.