SU778885A1 - Method of producing multilayer high-pressure spheric vessel - Google Patents

Description

(54) METHOD; MANUFACTURING HIGH PRESSURE MULTILAYERED SPHERICAL VESSEL The invention relates to methods for producing high pressure multilayered vessels, for example, for atomic reactors, chemical reactors or for storing NIN liquids and gases. A method for manufacturing a laminated spherical pressure vessel by mounting the multilayer metal shell, the behavior which sets an array of reinforcing metal elements meridional and circumferential direction with the elastic limit, prevyshayui they limit yppygoqti shell connected by the relation meridional lattice elements is fixed on the domes, which are taken out at plyusah spheres, after which in the vessel they create pressure at which the shell goes into plastic form, and the stresses in the lattice do not exceed elastic limit. After the pressure is removed, the polar domes and the grid to which it is fixed are removed, holes in the poles are bored under the continuous-shaped branch pipes, which are then welded to all or several inner layers of HT. However, the strength of the multilayer vessel obtained in this way increases only after by counting the metal work hardening of the layers and reducing the gap between them. The vessel is metal-intensive, since each layer is continuous and not prestressed. The metal of the nozzle is not inclined. In addition, in the joint zone of the multilayer wall and the continuous pipe, due to their different stiffness, during the operation of the vessel, a high concentration of stresses occurs, which can be determined when assessing the reliability of the vessel, especially during its personal work. The chain of the invention is to increase the strength of the vessel and reduce its metal intensity. - The goal is achieved due to the fact that the metal sheath is not compacted with the nozzles on which the meridional lattice elements are fixed. , and create pressure in the vessel, providing plastic deformation of the outer shell. Each subsequent layer of the nozzle is made with internal digetrom, smaller than the outer diameter of the nozzle of the previous layer, and before the nozzle "X" is heated. In order to uniformly distribute the stresses in the vessel layers, the reinforcement elements of the outer grid are displaced relative to the reinforcement elements of the internal grid.

Fig. 4-1 shows the first stage in the manufacture of a vessel (assembly of the inner layer (shell) of the vessel); in fig. 2 - the second stage (installation of the lattice on the inner shell of the vessel). ,, .. ,, „„. ,,,, „,,,.. ,,.

Initially, an internal solid shell of carbon steel 1 is assembled at the installation site and connected to the nozzles 2 located on the strips of the sphere. Separately, the second branch pipes 3 are made of high-strength steel with an inner diameter smaller than the outer diameter of the shell nozzle, and in a heated condition with a tension are put on the inner shell nozzles 2. Then, reinforcing elements 4, for example round section, of high-strength steel, curved in the form of the inner shell, 4, for example a circular cross section, are welded to the nozzles of the second layer and are tightened along the meridians with a tension device, and the reinforcing elements 5 of the ring direction are welded to them.

The pressure in the vessel is created by pressing pressure, in which the shell (first layer) is plastically formed, and the second, reinforcing layer (grid) is formed in the elastic zone. After REMOVAL of the pressure in the shell, a favorable distribution of residual stresses occurs.

Then mount the third layer (the second solid metal shell, similar to the inner shell 1) of carbon steel, on top of which the fourth layer (grid, similar to the second layer) is placed. eating the fourth layer layer between the shells (the first and the third layer) is filled with incompressible materials, map) ZdjosTsH, y KSh5 pressure is put, at which the second shell goes into the plastic stage, and both grids remain in the plastic elastic. After relieving the pressure, both shells remain well prestressed.

The installation of shells and grids is continued until the required vessel wall thickness is obtained.

By connecting all the layers with drainage holes, the pressure tightness in the interlayer Zhidkoety judges the tightness of the first inner shell. Using the same holes, monitor the pressure in the fluid between each pair of nearby shells and monitor their condition.

f A pressure vessel manufactured by the proposed method has increased strength, since all its continuous layers are favorably designed to be durable, and the metal,

Q of which they are made, on. riveted, part of the layers replaced by high-strength grille. All layers of multilayer connections are also prestressed, as they are splashed over each other with stress, in the area of attachment of shells

5 to nozzles there is no jump in stiffness, due to which, during operation, a more uniform distribution of stresses in this zone and an increase in the carrying capacity and reliability of the vessel arise.

0 In addition, there is a decrease in the metal consumption of the structure, since part of the layers is replaced by high-strength reinforced & 1 elements and each solid layer is pre-stressed, which

5 gives you the opportunity to make it smaller.

Claims (3)

1. Method of manufacturing a multilayer spherical vessel of high 0 pressure, at which the inner metal shell is mounted, install a grid of rebar metal elements of the meridional and annular directions with 5 limit the elasticity, exceeding the limit of the elasticity of the shell, and create pressure in the vessel, ensuring plastic deformation of the shell, and stress in the lattice, not exceeding the limit of elasticity, so that, in order to increase the reliability and strength of the vessel and increase its metal, metal sheath is made with pipes, which are fixed 5 meridional lattice elements, after relieving the pressure on the obtained semi-finished product, mount the next casing with a pipe and reinforcing bars, the space between the shells 0 is filled with an incompressible material, preferably liquid, and a pressure is created in the vessel, which ensures plastic deformation of the outer shell. 2. The method according to claim 1, wherein the pipes are multi-layered with connecting layers in series with shells and grids, each subsequent layer having an inner diameter smaller than the outer diameter of the previous layer , and before the nozzle layers of the pipes are heated.  3. The method according to p. 1,. O tl and ch and n, with the fact that, in order to uniformly distribute the stresses in