Application of Stress Analysis in Chemical Container Design

The Application of Stress Analysis in the Design of Chemical Containers Guo Deshun, Jingxu Jing, Henan University of Science and Technology. Zhengzhou 450000, China; 2. Yellow River Conservancy Vocational and Technical College. Henan Kaifeng 475,1 chemical container is a generic name for various chemical equipment shells. Cheng Cheng Chang's chemical containers are spherical tank boilers, cylinders, etc. The wall thickness of these vessels is greatly different from the internal diameter of the vessel, which is generally less than tenths.

therefore. Also referred to as thin-walled containers, when the container is filled with some kind of media, and the media is not properly measured or the manufacturing process does not meet the requirements. Distortion often occurs during use. Even blasting. It has brought serious harm to the life and property of the country and people. At the same time, the leakage of harmful media. It will also cause pollution in the surrounding environment. Therefore, thin-walled vessels must be precisely designed for stress. In this paper, stress analysis theory was used to analyze the strength design of internal pressure thin-walled cylinders.

The force and deformation of the J barrel are 3. The internal pressure is the pressure of the medium. The deformation of the cylinder after stress is under the internal pressure. Since it expands outward, in the direction of the cylinder axis in the longitudinal direction, the cylinder will undergo elongation and dare to deform in the direction perpendicular to the axis of the cylinder in the direction of the lateral direction. Since the cylinder is axisymmetric, other forms of deformation are not possible.

If Yang 1. , take off the arc. 1 汜 study. The cross section of the mountain, the corpus callosum, is large. Xian displacement to. 4, Can produce elongation deformation. According to stress analysis theory, there must be tension in the circumferential direction of the cylinder. At the same time, the half of the curvature of the celestial body increased from 1 to 1. This shows that the relative internal diameter of the cylinder is only very thin. Theoretically and experimentally, the bending internal force is much smaller than the pulling force. Usually in the engineering design, the influence of bending deformation is ignored, only the tensile stress on the thin-walled cylinder section is considered.

The stress in the circumferential direction, that is, the tensile stress caused by the cylinder being compressed and expanded, is generally called a circumferential stress or a hoop stress.

Axial stress, because the cylinder is closed at both ends, so there is pressure on the two ends of the surface, thus the tensile stress generated in the cylinder axis, generally known as the axial stress or longitudinal stress, above, 2. In the case of thin wall . Since 1 is smaller than others, it is usually not considered.

Mainly engaged in mechanics teaching and research.

De Tak-shun and other stresses, helium in the design of the first boundary device should be cut into two parts of the cylinder. The balance of the left half of the mortar. The internal pressure in the cylinder causes the cross-section to generate an axial internal force. 71 Khan 4 generates tensile stress at various points on the cross-section of the wall of the cylinder body, due to the thickness and thinness of the cylinder body. In the case of the distribution of the tumbler on the truncated tube body, the condition of the axis factory balance is: there is a ring, and then the plane passing through the axis of the cylinder is called the axis plane and the cylinder is cut into twos and six points. In the second half of the mountain, Shan Ping is divided. Immediately after germination, the force acting on the occlusal surface is flat. The combined force of the pressure inside the scoop is 01. Due to the thin wall of the tube body, the bending stress can be neglected. It is considered that the hoop stress is a tensile stress evenly distributed on the cross section, and the resultant force is 12. According to the equilibrium condition, the center of gravity is designed for the strength of the cylinder and mainly depends on the hoop stress of the cylinder. Practice also proves. Isometric thickness cylindrical internal pressure vessels tend to rupture in the longitudinal direction. According to this feature. Vertical design is particularly critical in engineering design and process handling. For example, when welding. The quality of longitudinal welds must be strictly guaranteed. If an oval hole is opened in the cylinder. The short axis should be caused by the longitudinal direction of the cylinder. 3, to minimize the weakening of the longitudinal section of the cylinder; 3 cylindrical wall strength calculation due to the strength of the decision-making is the hoop stress, as long as the allowable stress of the wall material is not called 1 can guarantee the inner pressure cylinder safe job. Therefore, the strength condition of the cylinder is that the formula is the strength condition of the thin-walled cylinder under internal pressure under ideal conditions. It cannot be directly used for design calculation because some factors that affect the strength have not been taken into consideration.

In practical applications, the material properties must also be considered. Manufacturing corrosion and many other factors.

Steel chemical vessels are mostly made of steel plates and welded. Welds and their vicinity 1 Cylindrical hoop stress distribution stress multiplied by a value less than 1 5,5 Weld seam coefficient is about the allowable stress of steel plate material Discounts to compensate for the weakening that may occur during welding. In addition. The general process conditions determine the inside diameter of the cylinder to be 0; the standard value conforming to the nominal diameter is used in the calculation formula. With the inner diameter than with the diameter of the convenient. For, can be in, 1; 弋 2 generation 1 type, out of the formula can be calculated within the pressure circle, in addition, the actual project should also consider the low-temperature brittle fracture over elastoplastic deformation medium corrosion stress corrosion corrosion fatigue And other factors affect the wall thickness. Therefore, the wall thickness of the cylinder is determined. At the time of calculation, an additional amount of wall thickness shall be added to the calculated wall thickness. In this way, the strength formula for the wall thickness of the inner pressure cylinder shall be finally known as follows. The wall of the internal pressure thin-walled cylinder is in its axial direction and the ring There is tensile stress, and the hoop stress of the cylinder is larger, which is twice the axial stress, that is = 2. The internal stress of the cylinder, under the action of the cylinder, the stress produced on the cylinder wall is mainly stress production. , According to the strength G additional wall thickness, P pressure pressure design, fury; M1 design temperature projection when the cylinder material should be, the weld coefficient.

It should be pointed out that the above equation is based on the wall thickness calculation formula derived only considering the internal pressure of the medium.

1 Korean leaf elephant. Introduction to chemical equipment. Beijing Higher Education Press, 990 2 sells beads. Material mechanics is called. Beijing Higher Education Press. 1 where.

1 Responsibility editor Yang Daofu