Upgrade of the belt fit for placing of dough blanks in cradles of the proofing cabinet conveyor

Contents

Summary

Introduction

1 Status and questions and literary review

2 Project Feasibility Study

3 Description of the principle of operation of the structure

4 Design part

5 Rules of installation, repair and operation of equipment

6 Economic part

7 Occupational safety

Conclusion

List of sources used

Summary

In this diploma project, the tape landing is being modernized. A patent search is also made in which descriptions of mechanisms similar in principle are given.

This diploma project contains 10 sheets A1 of the graphic part, 80 pages of the explanatory note, 16 sources of literature.

Introduction

One of the main tasks facing the food industry and food engineering is the creation of highly efficient technological equipment, which, based on the use of advanced technology, significantly increases labor productivity, reduces the negative impact on the environment and contributes to the saving of raw materials, fuel and energy and material resources.

More than 1/3 of the fleet of machines and equipment has already worked out two or more depreciation periods. The depreciation rate of fixed assets is 70%.

The insufficient rate of renewal of the active part of the main production funds led to the fact that the proportion of worn-out equipment in service for more than 10 years was in the food industry as a whole 35%, and in the sugar, butter, tobacco, yeast and confectionery industries - 40... 70%. The update of the equipment fleet currently does not exceed 3... 4% instead of the necessary 8... 10% per year.

The total level of mechanization of the production of food and processing industries of the agro-industrial complex does not exceed 44%.

These figures indicate how important the fruitful work of mechanical engineers is for the development of the food industry of the Republic of Belarus. In this activity, it is important not to follow, not to copy well-known equipment, but to find their own ways, to develop pioneer design solutions for machines and devices.

Scientific and technological progress in the agro-industrial complex is a complex dynamic process. It is associated with the formation of new knowledge and ideas, the technological mastery of scientific discoveries, inventions and the results of research and development, the introduction of innovations in the form of breakthrough, critical technologies, progressive technology, new types of raw materials, semi-finished products, additives, food products and non-food products, the choice of optimal forms of organization of production and labor, as well as other important types of scientific and technical activities that together constitute an innovative process.

While the role of mini-industries and small enterprises in meeting the needs of the population for food, it should be noted that the future lies in automated and automatic flow lines as part of large food and processing enterprises.

It is known that production automation is a complex design and technological task of creating new equipment. The main direction in solving this problem is not the replacement of human functions when servicing existing machines and units, but the development of such technological processes that would be generally impossible with the direct participation of a person. Therefore, in accordance with the requirements of automation, it is planned to transition from multi-stage processes with a system for transporting products from one apparatus to another to one-stage, from low-performance equipment to high-performance, from periodic processes to continuous ones.

This is why promising solutions for automation of production processes should be based on solving extraordinary technical problems by engineers, which in turn requires progressive development of process engineers.

Description of design principle

The dough blanks are fed to the rotary belt conveyor from the dough splitter and the inclined feed conveyor. The drive of the rotary belt is carried out from the motor reducer, conical and cylindrical gears to the drive shaft. Rotation is transmitted by a coupling electromagnetic clutch, and for instantaneous stopping of the tape when it moves one step, a brake electromagnetic clutch serves. In this case, the tape moves by a step equal to 285 mm. The cycle is repeated when the dough blank falls on the tape and ends after the seventh blank falls on the tape. After that, the conveyor rotates 45 * around its axis, drops the blanks into the cradle of the proofing cabinet and returns to the initial position. The rotation is carried out using a crank gear mechanism driven by a reduction motor. Periodic switching on and off of the landing mechanisms is carried out using limit switches and pulse counting relay.

Rules for installation, repair and operation of equipment

Installation of equipment is performed according to layout of process equipment location.

Laying of electrical routes to the limit switches, electromagnetic couplings, push-button posts is performed by AKVVG cable from the terminal box according to the metal structure of the landing device.

Laying of electrical routes from the control cabinet to the terminal box, to the control cabinet of the proofing cabinet is performed during installation.

On electrical devices mounted on the control board. In accordance with the electrical connection diagram, mark on white paper tags.

Regularly perform scheduled preventive inspection of the landing device

Check once every three months

A) Presence of lubricant in motor reducers, electromagnetic couplings;

B) Presence of lubricant in bearings;

C) Reliability of attachment of all bolted connections;

D) Conveyor belt tension;

E) Serviceability of cradles of proofing cabinet;

F) Safety of fence attachment;

The electrical equipment shall be maintained in full compliance with the requirements set out in the operating instructions for the equipment.

At the end of each working shift perform sanitary treatment of the equipment.

Conclusion

In this diploma project, the tape landing was modernized, a patent search was made in which descriptions of mechanisms similar to the principle of operation were given, as well as an economic calculation of the modernization carried out and its effectiveness was proved.