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Low-temperature pipeline high-pressure burst testing device

A low-temperature pipeline and blasting test technology, which is applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems that cannot meet the requirements of pipeline blasting tests, and the real state cannot be known, so as to achieve simple operation and guarantee safe effect

Active Publication Date: 2014-12-24
BEIJING INST OF STRUCTURE & ENVIRONMENT ENG +1
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Problems solved by technology

As an indispensable component of rockets, cryogenic pipelines have long been evaluated by means of calculations to assess their stress state and structural load-bearing limit, and the real state has no way of knowing
However, the maximum operating pressure of general-purpose low-temperature booster equipment is only 7MPa, which cannot meet the requirements for pipeline blasting tests.

Method used

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] First solve the problem of pipeline installation and fixing. Usually, two ends of the cryogenic pipeline 6 are respectively provided with an open flange, such as figure 1 As shown, the open flange includes a sealing surface 2 at the upper end, a cavity body 4 and a fixed support end 3 at the lower end thereof, and a filling port 1 is provided on the side of the cavity body 4, and the filling port 1 and the bottom surface of the cavity body 4 , that is, the upper surface of the fixed support end 3 is flush, the cavity 4 communicates with the filling port 1, and the water flows out through the filling port 1 by its own weight when draining water. The open flange simultaneously has three functions of sealing, filling pressurization and fixing. In order to ensure its performance at low temperature, the stainless steel material 0Cr18Ni9 is used for ...

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Abstract

The invention belongs to the technical field of structural strength of aviation and aerospace and specifically relates to a low-temperature pipeline high-pressure burst testing device. The device comprises a filling system and a pressurizing system, wherein the filling system comprises a stainless steel flexible pipe S2 with the through diameter of 20mm, a low-temperature pipeline, a stainless steel flexible pipe S1 with the through diameter of 20mm, a manual valve F1 and a liquid nitrogen tank which are connected with one another sequentially, S1 is a filling pipe and S2 is an exhaust pipe; the pressurizing system comprises a pressure sensor D1, a stainless steel flexible pipe L1 with the through diameter of 10mm, the manual valve F1, the stainless steel flexible pipe S1 with the through diameter of 20mm, the low-temperature pipeline, the stainless steel flexible pipe S2 with the through diameter of 20mm, a stainless steel flexible pipe L2 with the through diameter of 10mm, a rubber flexible pipe J1 with the through diameter of 10mm, a manual valve F2 and a nitrogen bottle which are connected with one another sequentially. The low-temperature pipeline high-pressure burst testing device provided by the invention can apply a high-pressure load to the pipeline filled with a low-temperature medium, thereby obtaining a real stress state and a carrying limit of the low-temperature pipeline through a testing means.

Description

technical field [0001] The invention belongs to the technical field of aerospace structure strength, and in particular relates to a low-temperature pipeline high-pressure blasting test device. Background technique [0002] Cryogenic media are increasingly used in the development and launch of rockets, such as liquid nitrogen, liquid hydrogen, and liquid oxygen. Therefore, not only the structure of the rocket, but also the influence of temperature on the strength of the structure must be considered during the development process. As an essential component of rockets, cryogenic pipelines have long been evaluated by means of calculations to assess their stress state and structural load-bearing limit, and the real state has no way of knowing. However, the maximum operating pressure of general-purpose low-temperature booster equipment is only 7MPa, which cannot meet the requirements for pipeline blasting tests. Contents of the invention [0003] The purpose of the present inv...

Claims

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Application Information

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IPC IPC(8): G01N3/12
Inventor 陈昊王鸿博丁文祺郭冰倪径达顾海贝杜珺毛丽娜
Owner BEIJING INST OF STRUCTURE & ENVIRONMENT ENG
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