product details
The key components for thermal compensation in the heat pipe network and equipment, due to the small axial stiffness of the corrugated expansion joint, the axial force generated by the internal pressure of the pipeline often affects the design and use of the pipeline system. The corrugated expansion joint in the pipeline system, in which axial force is transmitted without any constraints, is called a free type (unbalanced type) corrugated expansion joint; The axial force is constrained by certain mechanisms or devices and cannot be transmitted to the corrugated expansion joint, which is called a balanced corrugated expansion joint. The balanced corrugated expansion joint can be divided into two types: damping type andabsorption type. The corrugated expansion joint, which uses components such as pull rods and hinges to prevent axial force transmission, is a damping type; The ripple expansion joint that utilizes work pressure to achieve balance is an absorption type.
The directly buried (fully buried) expansion joint is one of the key components for thermal compensation (axial, horizontal, and angular displacement) in modern heating pipelines and equipment. The thermal compensation performance of the compensator is determined by the corrugated pipe.Bellows are allowed to undergo significant changes under the action of axial force, lateral force, and bending moment. As thin-walled flexible components, their peaks and valleys work within the plastic range. Therefore, in addition to requiring sufficient rigidity, strength, stability, and fatigue life, they also need to have greater flexibility, and their stress distribution is much more complex than that of containers.
During the normal operation of the buried (fully buried) expansion joint, it is required that the gravity borne by the pipeline system be borne by various supports and hangers, so that the pipeline system can freely expand (contract); At the same time, the pre deformation of pipelines is often used to reduce the thrust of pipe supports and enhance their stability, which are particularly important in the process of device construction and renovation.
During the normal operation of the buried (fully buried) expansion joint, it is required that the gravity borne by the pipeline system is borne by variouspipe supports (hangers). The corresponding mass of the flue in this device is 20t, which is borne by a constant force spring. During the renovation process, the piping system was rigidly fixed without resetting the constant force spring; Due to the special displacement of the constant force spring, it cannot be restored to its original state after the external load is removed. So after reinstallation, the constant force spring is actually in a state of no force; When the mass of the flue is compressed after the rigid fixation is lifted, it causes the pipeline to move downwards and the angle of the expansion joint to increase.
