Reinforced bulging tank of launch vehicle and manufacturing method therefor

A reinforced bulging tank of a launch vehicle, comprising a barrel section body (9), barrel section thickening regions (5) arranged on both ends of the barrel section body (9), longitudinal reinforcing ribs (7) arranged on the inner walls of the barrel section body (9) and the barrel section thickening regions (5), and annular frames (8) and annular plates (6) which are matched and reinforced with the longitudinal reinforcing ribs (7);

• wherein a front end surface of the barrel section thickening regions (5) is provided with a front bottom (2) and a front short shell (4);
• the front bottom (2) is connected with the barrel section thickening regions (5) through the front short shell (4);
• a rear end surface of the barrel section thickening regions (5) is provided with a rear short shell (10) and a rear bottom (12);
• the rear bottom (12) is connected with the barrel section thickening regions (5) through the rear short shell (10);
• wherein the front short shell (4) is provided with a front end frame (3);
• the rear short shell (10) is provided with a rear end frame (11);
• a manhole (1) is arranged in the top middle of the front bottom (2);
• wherein the cross section of the annular frames (8) is in “C” shape, the cross section size is larger than the longitudinal reinforcing ribs (7), and a groove is formed across the longitudinal reinforcing ribs (7);
• wherein the annular frames (8) are connected with the inner wall surface of the barrel section in the form of welding;
• wherein the cross section size and axial spacing of the annular frames (8) are designed to satisfy pressure stability of the barrel section of the tank;
• the basic size of the annular frames (8) is unchanged in the bulging process of the tank, so that the materials after cold hardening, the materials after heat treatment hardening or other high-strength materials that can be welded with barrel sections can be selected.

A reinforced bulging tank of a launch vehicle, comprising a barrel section body (9), barrel section thickening regions (5) arranged on both ends of the barrel section body (9), longitudinal reinforcing ribs (7) arranged on inner walls of the barrel section body (9) and the barrel section thickening regions (5), and annular frames (8) and annular plates (6) which are matched and reinforced with the longitudinal reinforcing ribs (7);

• wherein a front end surface of the barrel section thickening regions (5) is provided with a front bottom (2) and a front short shell (4);
• the front bottom (2) is connected with the barrel section thickening regions (5) through the front short shell (4);
• a rear end surface of the barrel section thickening regions (5) is provided with a rear short shell (10) and a rear bottom (12);
• the rear bottom (12) is connected with the barrel section thickening regions (5) through the rear short shell (10);
• wherein the front short shell (4) is provided with a front end frame (3);
• the rear short shell (10) is provided with a rear end frame (11);
• a manhole (1) is arranged in the top middle of the front bottom (2);
• the front short shell (4), the front end frame (3) and maximum-diameter conical plates of the front bottom (2) are welded to form a structure with a cross section of a right triangle;
• the rear short shell (10), the rear end frame (11) and maximum-diameter conical plates of the rear bottom (12) are welded to form a structure with a cross section of a right triangle;
• wherein the length of the front short shell (4) and the rear short shell (10) is designed to satisfy the width of the end frame and the connection of the tank with other sections, and the thickness should satisfy the strength requirements under axial load.