RU2452677C1 - Screw conveyor intake device - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: proposed device consists of case 1 with divergent section 2, screw 3 with shaft 4 having hollow expanded initial section 5 provided with openings 6 and vanes directed inside said shaft and arranged on larger side of each said opening. Said shaft hollow section accommodates insert 8 shaped to cone with concave surface to support auger 9. Note here that cone base and shaft face features equal diameter at their joint. Besides, vanes 10 are fitted on inner side of shaft hollow section, directly behind said openings. Annular hole is made at shaft expanding initial section. Material is fed into intake device from bin 12.

EFFECT: higher efficiency and reliability.

1 dwg

Description

The invention relates to hoisting-and-transport machines, namely, to intake devices of a screw conveyor, and can be used to load bulk material in various industries.

The closest in technical essence and the achieved effect to the proposed is the intake device of the screw conveyor [RF Patent No. 2277505, B65Q 33/24, publ. 06/10/2006, B.I. No. 16], comprising a housing with an expanding initial part and a screw with a shaft made with a hollow expanding initial part, which is equipped with windows made along a helical line and blades directed inside the shaft.

The disadvantages of the known intaking device of the screw conveyor are the low reliability of the device, since in the tapering part of the hopper can be formed from bulk material, preventing it from moving into the expanding part of the screw with the shaft, which leads to a decrease in the fill factor and productivity of the device.

An object of the invention is to increase the reliability, duty cycle and performance of the device.

The object of the invention is achieved in that in the intake device of the screw conveyor, including the intake device of the screw conveyor, comprising a housing with an expanding initial part and a screw located therein with a shaft and with a hollow expanding initial part provided with windows with rounded ends made along a helical line , and curved blades repeating the shape of the window, placed on the larger side of each window and directed inside the shaft, the new thing is that inside the hollow expanding beginning the main part of the shaft along its axis is an insert in the form of a cone with a concave surface on which the screw is placed, the base of the cone and the end of the shaft at the place of their mating have the same diameter, and additionally placed blades directly behind the windows on the inside of the hollow expanding initial part of the shaft at the same time, an annular hole is made along the interface in the expanding initial part of the shaft.

The technical result of the invention is to increase the reliability, fill factor and productivity of the device.

Figure 1 schematically shows the intake device of a screw conveyor; figure 2 - expanding the initial part of the shaft.

The intake device consists of a housing 1 with an expanding initial part 2, a screw 3 with a shaft 4, made with a hollow expanding initial part 5, having windows 6 and blades 7 located on the larger side of the window 6, directed inside the shaft 4.

Inside the cavity of the expanding initial part 5 of the shaft 4, there is an insert 8 in the form of a cone with a concave surface on which the screw 9 is placed, and the base of the cone and the end face of the shaft 4 in the place of their mating (contact) have the same diameter, and directly behind the windows 6 on the inner side of the hollow expanding initial part 5 of the shaft 4, blades 10 are additionally placed, while an annular hole 11 is made along the interface in the expanding initial part of the shaft.

The supply of material to the intake device is made from the hopper 12.

Intake device screw conveyor operates as follows.

Bulk material comes from the hopper 12 into the hollow part 5 and enters the blades 7. When the screw 3 and, therefore, the screw 9, which takes the bulk product from the hopper 12, as well as the blades 7 and 10, rotate, the bulk material exits through the windows through the action of centrifugal forces 6 and the annular hole 11, is sealed and then gets on the screw 3 of the screw conveyor for subsequent transportation.

The proposed intake device of the screw conveyor allows you to:

- to improve the reliability of the device by timely collection of the bulk product from the tapering part of the feed hopper, thereby eliminating the possible arch formation from the bulk material due to the location inside the cavity of the expanding initial part of the shaft along its insert axis in the form of a cone with a concave surface on which the screw is placed ;

- to increase the fill factor and the productivity of the device by performing the base of the cone and the shaft end in the place of their contact of the same diameter, and along the interface in the expanding initial part of the shaft of the annular hole and additional placement of the blades directly behind the windows on the inner side of the hollow expanding initial part of the shaft.

Claims (1)

Intake device of a screw conveyor, including a housing with an expanding initial part and a screw with a shaft and a hollow expanding initial part, provided with windows with rounded ends made along a helical line and curved blades that repeat the shape of the window, placed on the larger side of each window and directed towards the inside of the shaft, characterized in that an insert in the form of a cone with a concave surface on which the screw is placed is located inside the hollow expanding initial part of the shaft along its axis. the cone and the shaft end in the place of their conjugation have the same diameter, and blades are additionally placed directly behind the windows on the inner side of the hollow expanding initial part of the shaft, and an annular hole is made along the interface in the expanding initial part of the shaft.

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