6 results about "Large deformation" patented technology

The invention relates to the technical field of pipeline vibration tests, and particularly discloses a pressure balancing system and method for a rocket conveying pipeline system vibration test. The upper end of a test piece in the system is fixed to a portal frame through a pipeline upper-end fixing tool, the lower end of the test piece is connected with a vibration table through a vibration tool in a pressure balancing device, and the pressure balancing device is further connected with a force and displacement monitoring system. The test piece is connected with a measurement and data acquisition system and a control system, and the pipeline upper-end fixing tool is connected with a water injection pressurization system used for liquid filling and air inflation testing on the test piece. The pressure balancing system and method can be used for balancing pipeline deformation caused by the pressure effect and especially for large deformation caused by deformability of a corrugated pipe and ensure that all end faces of a pipeline are located at an initial position of a product as required; meanwhile, the freedom degree in the vibration loading direction can be guaranteed, and the influences on thrust of equipment can be reduced to the maximum extent.

The invention discloses a resistance-increasing yielding large-deformation anchor rod and a construction method thereof. The resistance-increasing yielding large-deformation anchor rod is composed of deformation springs, anchoring rods, fixing balls and connecting sleeve barrels; high-strength extension springs are adopted as the deformation springs, solid metal rod bodies are adopted as the anchoring rods, hollow elliptical metal ball bodies are adopted as the fixing balls, and each fixing ball is provided with connectors with outer threads; the deformation springs and the corresponding anchoring rod are sequentially connected between two corresponding fixing balls through the corresponding connecting sleeve barrels with inner threads to form a structure unit of the resistance-increasing yielding large-deformation anchor rod; a plurality of the structure units are assembled according to the anchoring depth or length, and the end of the outermost structure unit is further connected with one anchoring rod segment for allowing a tray and a nut of the anchor rod to be installed, and then the resistance-increasing yielding large-deformation anchor rod is formed. The resistance-increasing yielding large-deformation anchor rod can be tensioned to deform when surrounding rock generates large deformation, the resistance is steadily increased simultaneously, and therefore the stability of the surrounding rock is effectively kept.

The invention relates to a vertically and horizontally combined gas pressure spring, which solves the problems of complicated structure and low compressive strength of a current gas spring. The vertically and horizontally combined gas pressure spring comprises a spring body and is characterized in that the spring body comprises a plurality of vertically arranged gas column strips with pressure gas containing cavities, horizontal hollow annular gas bags are sleeved on the gas column strips, the upper end and the lower end of each gas column strip are respectively positioned and connected, and gas pressure in the containing cavities can be adjusted. The hardness of the vertically and horizontally combined gas pressure spring is conveniently adjusted by filling pressure gas, particularly, the gas pressure spring has the advantage of large deformation travel, one-way deformation range is wide, the demands of various occasions are met, and the gas pressure spring can be adjusted in real time so that comfort is enhanced. Moreover, the gas pressure spring is convenient to coil, transport cost is saved, and a user can use the gas pressure spring only by filling the gas and the unfolding the gas pressure spring. Besides, the gas pressure spring is positioned in a vertically and horizontally combined manner, so that the gas pressure spring is stressed in a balanced manner, and damage caused by unbalanced stress of unilateral bias pressure is prevented.