Course project on continuous transport machines

Contents

Introduction of _________________________________________________________

Source Data __________________________________________________

Calculation of conveyor mechanisms ________________________________________

Conclusion of the _______________________________________________________

List of literature _________________________________________________

Introduction

The purpose of this course project is the design calculation of a conveyor designed to transport alloying components to the vacuum steelmaking chamber located on the territory of workshop No. 8 of OMZ Spetsstal, Izhora Plants.

The vacuum steelmaking chamber is a tank with a hermetically closed cover. Steel-melting ladle with prepared melt is placed in this tank, then air medium is removed from the chamber by filling the chamber with inert gas and negative pressure is created with the help of powerful water-ring pumps.

After that, alloying components are added to the melt, allowing to obtain from the initial steel all kinds of alloyed, instrumental and corrosion-resistant alloys. Alloys are mixed by means of electromagnetic field.

To add alloying components, sluice hoppers are used that sequentially open and do not allow air to enter the working vacuum chamber.

Alloying components enter the locks by means of a conveyor receiving various types of ore and powders from a collecting bin in an adjacent room. The supply of components for the vacuum chamber is controlled by gate valves on the side walls of the hoppers.

The hoppers, in turn, are loaded with a grab crane.

I'm going to be working on the pipeline calculation for this system. The conveyor now performing its functions is not only morally obsolete, but also poses a high danger during operation due to wear and tear of units and mechanisms.

Frame of active conveyor is located on concrete base and is fixed to it by means of anchor bolts. I propose to use the concrete base as a support for a new installation, which determines its shape.

Source Data

A rare, short-term (preferably fast) supply of small volumes of high-abrasive materials to the locks of the vacuum chamber is required.

Shift job Q = 500 t;

Length of lower horizontal section L1 = 9m;

Length of inclined section L2 = 4 m;

Length of upper horizontal section L3 = 11 m;

Inclination angle of inclined section α = 180;

Properties of cargo: bulk density ρ = from 1.3 to 4.6 t/m3; angle of natural slope A = 35400; the maximum size of the piece is 0.05m.

Conclusion

As a result of the calculations, it was found that the conveyor is able to carry out transportation in the desired volume not only with an average design load, but also in much larger volumes, which guarantees its reliability in a long time. Moreover, when changing any input data, the calculated conveyer will not have to be changed or reconfigured.

I believe that the calculation is economically profitable due to the small distances, the use of the concrete base of the previous installation, the ease of installation, operation and high abrasive stability of the tape.

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