Assembly and welding of liquid-mesh filter

Contents

Introduction

Process Part

1.1 Purpose

1.2 Composition, device and operation of the article

1.3 Technical characteristics

1.4 Strength calculation

1.5 Material Selection

1.6 Selection and justification of welding method

1.7 Selection of welding materials

1.8 Modes

1.9 Types of defects during welding. Processability and accuracy of welded structures

Design Part

2.1 Selection of welding equipment

2.2 Selection of standard equipment

2.3 Tooling

2.4 Calculation of roller support gear box

Organizational and Economic Part

3.1 Calculation of techno-economic efficiency

Process Safety

Conclusion

List of used literature

The purpose of the diploma project is:

1. Design a welded structure - liquid mesh filter FSZH1002003 and process equipment for the welding operation;

2. Develop the technology of the filter housing manufacturing, the technology of assembly and welding of the product, welding of nozzle and hatch branch pipes.

3. Calculate cost and technical and economic efficiency of development.

4. Develop TB measures during welding operations

Introduction

The subject of consideration is liquid mesh filter FSZH100-200-3

The basis of the diploma design is the choice of the main parameters of the technological process of manufacturing the welded structure, primarily procurement and assembly and welding. An important task is also to acquire skills in the practical development of a set of knowledge obtained when studying other special subjects in the specialty "equipment and technology of welding production," the ability to use reference literature and regulatory and technical documentation.

Welding is the process of producing an undisturbed compound by establishing interatomic bonds between welded parts with their local or general heating, or plastic deformation, or the combined action of both. It is usually used for the compound of metals, their alloys or thermoplastics, as well as in medicine.

Various energy sources are used for welding: electric arc, gas flame, laser radiation, electron beam, friction, ultrasound. The development of technologies currently allows welding not only in industrial enterprises, but also in the open air, underwater and even in space.

Electrical welding is a great Russian invention.

In 1802, V.V. Petrov for the first time in the world discovered the phenomenon of an electric arc and pointed to the possibility of using the thermal energy of the arc in the melting of metals. He was the first to build the largest battery for that time, with the help of which he conducted his experiments. V.V. Petrov published these remarkable experiments with an electric arc in 1803. It indicates that an electric arc can be used .

The world's first electric arc welding was carried out by Russian engineer Nikolai Nikolaevich Benardos (1842-1904). Work on the creation of large batteries led him in 1882 to the invention of the method of electric arc welding of metals in Russia and several other countries.

Further development of welding was used in the works of N.G. Slavyanov (1854-1897). Slavyanov's name is associated with the development of the metallurgical foundations of electrical welding and the creation of a method of welding with a metal electrode. He also has the merit of creating an automatic arc length regulator and a first welding generator.

The development of welding can be divided into three stages:

the first stage from 1924 to 1935. The welding process at that time was carried out manually, by electrodes without coating or with a thin insulating coating of electrodes .

The second stage from 1935 to 1940. During these years, welding was widely introduced in all industries based on the use of electrodes with a special coating .

The third stage since 1940. This stage is characterized by the maximum introduction of mechanization in the welding process on the basis of the modern method of automatic welding under a flux layer developed in 1940 under the leadership of E.O. Patonov.

The use of welding gives not only metal savings (by 20-25%), but also savings in time and labor.

Welding methods have been developed and used in some industries: pressure welding, friction welding, ultrasonic welding, high-frequency currents, plasma arc welding, electron beam welding in vacuum, diffusion welding in vacuum, explosion welding, laser beam welding under water. In the coming years, significant further advances can be made in the development and industrial application of new types of welding. There were achievements in the field of mechanization and automation of welding processes, which made it possible to raise the production of boilers, pipes and pipelines, sea and river vessels, oil equipment, rolling machines, powerful presses and pumps and other machines and mechanisms to a high technical level.

Qualitative characteristics.

The filter is designed for cleaning oils and various liquids (pure neutral, aggressive), emulsions and suspensions in oil, oil refining, petrochemical, gas producing, gas processing, metallurgical and other industries.

Tasks:

1 material selection based on operating conditions for non-aggressive media, and climatic conditions from + 40 to 40 gr

2 choice of rational and cost-effective welding method

Composition, device and operation of the article

The filter is a cylindrical vessel of welded construction, which consists of a filter body and a cover, which is installed from above through a gasket. The cover is connected to the filter body by means of bolts and nuts.

To lift the cover during installation and maintenance work, the filter structure includes a bracket, steering handle, and a hinged bolt.

Inside the housing, on the support ring, through the sealing gasket, a filtering device is installed and fixed with special bolts, which is a collection structure from the housing of the filtering device, covers tightened through the gasket with a nut with a handle and a rod.

Working fluid is supplied from pipeline through inlet branch pipe into filter housing. Then, through the cover of the filtering device and the body of the filtering device, it enters the outlet branch pipe and is supplied to the electric pump unit.

The principle of operation of the filter is based on the passage of working fluid through a filtering device that captures solid particles larger than 200 μm. The retained solids are lowered into the lower portion of the filter body forming a precipitate.

To empty the filter in the lower part of the filter body there is a drain branch pipe closed with a plug.

Pressure drop more than 0.014 MPa indicates clogging of the filter element.

Semiautomatic SYNERGIC PRO 450 is used when welding the filter housing

Designed for welding with a melting electrode wire (solid or powder) in the medium of protective gases of carbonaceous, low-alloyed and stainless steels, aluminum and its alloys.

Conclusion

In accordance with the initial data - the design drawing, technical requirements for the welded structure, the production program, work was carried out on the assembly and welding technology of the Mesh and Liquid Filter and the requirements for the reliability and service life of the structure, the main materials for welding were selected; to ensure the equal strength of welds with the main material, appropriate welding materials were selected, methods for producing an undisturbed joint were chosen, and the equipment necessary for welding the structure; welding modes are calculated, information on methods for inspection of welded joints is given.

During welding of welded structure elements: bottoms to shell housing, the following technical and economic parameters can be provided:

- stability of production;

- quality of welds;

- reduction of material costs;

The proposed welding technology ensures cost-effectiveness when it is introduced into production.