Method for mounting cylindrical bodies of sheet structures

FIELD: manufacture of metallic vessels.

SUBSTANCE: method comprises steps of making blank in the form of coiled web with strips fluid-tightly secured to its surface; forming cylindrical body by uncoiling coiled web and joining its mutually abutted lengthwise edges; reinforcing body by means of helical rigidity ribs due to deforming strip and body part under said ribs; fastening bottom and lid. Before reinforcing cylindrical body with use of helical rigidity ribs, detachable soft jigs are arranged on body from above and below and they are fluid-tightly secured to end edges of body. Said jigs are made of water- and air impermeable elastic material.

EFFECT: lowered labor consumption, enhanced efficiency.

3 dwg, 1 ex

 

The present invention relates to the field of construction and can be used in the construction of metal containers for storage of liquid and granular products.

Known methods of manufacturing a cylindrical housings of sheet structures from the roll of material in the form of a panel [1], using which fulfill the oversized shell structures - silos, vertical tanks, hoods blast furnaces and other Rigidity and stability of shells of these structures is provided an annular or vertical stiffeners. The disadvantages of this method are: the significant complexity of the technological process, in particular the expander roll and get the project of the cylindrical shape of the tank, the high complexity of the work.

The closest in technical essence is the mounting method [2] cylindrical housings of sheet products, comprising the following operations: production of rolled billets in the form of a wide strip of constant thickness, forming a cylindrical body with subsequent bulging of the ribs. With this method of installation and manufacture of structures made from rolled workpiece strip is displayed for end-of-form on the lining, length not less than the width of the strip, pre-attached to the front side of the sheet. During installation of bresults the hollow spiral ribs. After the formation of the hollow ribs lining and part of the stripes placed behind the front edge, the cut, which increases the complexity and expense of metal. This method allows to form the cylindrical body of sheet structures of constant thickness, provided with spiral ribs, made from sheet steel. The disadvantage of this method of mounting is that when forming ribs require additional work on the removal of the ends of the ribs on the lining, which, after completion of installation works are cut, which increases the consumption of metal, the complexity of the work and installation time.

The purpose of the invention is to reduce the complexity and expense of metal and increase productivity when mounting cylindrical housings of sheet structures.

This objective is achieved in that in the method of mounting cylindrical housings of sheet products, including the manufacture of rolled work pieces of cloth with tightly attached to the surface of the strips forming the cylindrical body by expanding the rolled workpiece connection with its adjoining longitudinal edges, the reinforcement of the finished hull spiral ribs by deformation of the strip and part of the body under them, attaching a bottom and a roof, before reinforcements cylindrical body SPIRA is ranked on the ribs at the top and bottom of the cylindrical housing set removable soft conductors, attached tightly to its end edges; the conductors are made of water - and airtight tensile material.

The proposed method of mounting cylindrical housings of sheet structures allows to form the shell of constant thickness and to obtain hollow ribs without displaying them behind the front edge of the sheet by means of a removable conductor. In this regard, the authors conclude that the proposed method of manufacture and installation of buildings sheet metal structures has a significant difference.

Figure 1 shows a diagram of the manufacturing and installation of the cylindrical body of the roller blanks: (a) the manufacture of rolled billets with welded at her stripes; b) folding the blank into a roll; C) maximizing roll up design dimensions and welding of the side seam; d) attaching a removable conductors and forming a hollow ribs;

figure 2 - cross section 1-1 to deformation of the sheet and strips;

figure 3 - cross section 1-1 after deformation of the sheet, and strip.

The method of mounting cylindrical housings includes the manufacture of rolled billets consisting of a sheet 1 of constant thickness tl, lanes 2 width hpand the thickness tp=tl, attaching soft removable conductor 3 and the shape of the body with hollow ribs.

The method of mounting cylindrical building the owls sheet structures as follows. Make a flat workpiece in the form of a sheet of constant thickness 1, which is hermetically welding seam is attached along the longitudinal edges of the strip 2, a thickness equal to the thickness of the sheet. Then unwrap the roll up design size and connect the vertical longitudinal seam; forming a cylindrical container; the end edges of the sheet are attached soft removable conductors 3 of tensile water - and airtight material, for example, with tape-Velcro. Next, in the space between the sheet 1 and the strips 2 apply excessive pressure with air, liquid, light weight concrete, fire foam, etc. Occurs, the deformation of the strips 2 and part of the sheet under them, with the formation of the hollow ribs 4, which is hollow and after removal of the pressure due to the plastic properties and ultimate Flexural rigidity of the steel. The hollow cross section of the ribs 4 are located symmetrically with respect to the middle surface of the shell.

As a result of the operations is formed of a cylindrical body of constant thickness, reinforced hollow ribs.

The proposed method can be used in the manufacture of sheet products and installation ribbed cylindrical shells.

Sources of information

1. Lessig E.N., Lileev A.F. Sheet metal construction. - M.: stroiizdat, 1970. - 488 S.

2. A.S. 2206424 2, CL, B 21 D 51/18, B 65 D88/06. The method of mounting cylindrical housings of sheet structures / Apenisa, Ski, Saadeddine, Sevrain // BI, 2003, No. 17.

The method of mounting cylindrical housings of sheet products, including the manufacture of rolled work pieces of cloth with tightly attached on the surface of the strips forming the cylindrical body by expanding the rolled workpiece connection with its adjoining longitudinal edges, the reinforcement of the finished hull spiral ribs by deformation of the strip and part of the body under them, attaching a bottom and a roof, characterized in that before reinforcements cylindrical body spiral ribs on the top and bottom of the chassis installing removable soft jigs, fasten them tightly to its end edges, and the conductors are made of water - and airtight tensile material.



 

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