SU620417A1 - Device for pressing conveyer belt to drum - Google Patents

Description

The invention of the invention to the conveyor eHRi4 namely to the drive devices of the foam conveyors with the pressing of the antlers to the drum by air pumping.

The known drive of the belt conveyor b is an adjustable pressing of the penta to the drive drum, containing the drive drum, enveloped by the conveyor belt, hollow head, coaxially with compressed air, the surface of which, perched to the drum, is perforated flT.

The disadvantage of this drive is a significant compressed air consumption.

It is also known a device for burning the conveyor belt to a driving drum, comprising a pneumatic chamber connected to a source of compressed air, the surface of which, facing the drum, is made with openings, and rollers are fixed to its end parts and has rollers. along the edges of the drum there are annular grooves 2.

The disadvantage of this device lies in the fact that rigidly fixed rollers at the ends of the chamber do not allow to precisely copy irregularities on the surface of the conveyor belt, thus creating the possibility of leakage of compressed air, In addition to South, there are gaps in the labyrinth seal. All this causes an increased consumption of compressed air, reduces the efficiency of the device.

The purpose of the invention is to reduce the consumption of compressed air by automatically copying irregularities of the conveyor belt by sealing the chamber elements and increasing the durability of the sealing elements.

This is achieved by the fact that in the device for pressing the conveyor pentas to the drum, which contains the pneumatic pressure chamber, communicated with a source of compressed air, the surface of which, facing the load-carrying belt, envelopes the driving drum, is provided with openings in which elements are mounted with axial displacement in the form of nozzles, the pneumatic pressure chamber is provided with a cuff, a flexible material, such as rubber, and the nozzles are mounted on the cuff. FIG. 1 shows a device for pressing the conveyor belt to the drum, general view; in fig. 2 is a section A-A in FIG. 1; in fig. - node 1 in FIG. 2. The device for pressing the conveyor belt to the drum has a pneumatic chamber pressure 1 with a perforated surface 2, in which holes nozzles 3 are installed, having annular cavities 4. The pneumatic pressure chamber is rigidly fixed on the frame of the conveyor and connected to a source of compressed air. Inside the pressure chamber D there is a cuff 5, made in the form of a perforated sheet of highly elastic rubber, the centers of the holes of which coincide with the centers of the holes of the perforated surface 2 of the pressure chamber 1. The cuff 5 is dressed in the annular grooves 4 of the nozzles 2 and clamped: around the perimeter of the pressure chamber. 1 between the casing 6 and the lid 7. The pressure chamber encloses the drive drum 8 at the point of bending around its conveyor belt 2S

that 9.

The device for pressing the conveyor pentas to the drum works as follows. Simultaneously with the supply of compressed air into the pneumatic pressure chamber, no. 1 is driven by a drum 8 with a conveyor belt. 9. Compressed air, through the holes in the nozzles 3, presses the conveyor belt 9 to the drum 8 and the air outlet under the nozzles forms the thinnest 35 air cushion.

The rubber cuff 5, wearing the annular grooves 4 of the nozzles 3 and clamped between the body 6 and the lid 7, eliminates the {{compressed air) output into the gaps between the holes - 40 in the perforated surface 2 and with the ips 3 and simultaneously allows displacement of the nozzles 3 in the east direction.

At the time of passage of the irregularities of the con45 fan with 9 under the camera. pressure 1,

air by automatically copying the irregularities of the congruity band with the sealing elements of the chamber and strengthening them. durability, the pneumatic pressure chamber is provided with elements installed in the form of axially displaceable elements in the form of nozzles.

2. The apparatus of claim 1, wherein the pneumatic pressure chamber is provided with a cuff made of an elastic material, such as rubber, and the nozzles are mounted on the cuff.

Sources and information taken into account during / examination:

1. USSR author's certificate

No. 379483, cl. B 65 Q 23 / О4, 197О.

2. For the number 2349О74 / ОЗ,

cl. B 65 23 / O4, 1976, according to which there is a positive decision on the issue of the author's certificate. the nozzles 3 automatically copy them, keeping the air cushion intact. This ensures the least expenditure of compressed air and minimal: wear of sealing elements - nozzles. The application of this technical solution will allow increasing the efficiency of the device operation due to a significant reduction in the compressed air consumption and minimal wear of the sealing elements of the chamber. Some, reducing the area of pressing the conveyor belt to the drum can be compensated by increasing the pressure of compressed air, the cost of obtaining which with minimal consumption will be small. Claim 1. Device for pressing the conveyor belt to the drum, which includes a pressure chamber communicated with a source of compressed air, the surface of which, facing the conveyor belt, the envelope of the driving drum, has a hole characterized by that. that, in order to reduce consumption,

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