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Two-way driving pipe fracture simulation experiment device and experiment method

A simulated experimental device and two-way drive technology, which is applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems of difficult preparation, high risk, and high cost of pipeline fracture test specimens, and achieve reduced work risks and convenience Obtaining and reducing the effect of size error

Active Publication Date: 2019-09-06
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the existing technical defects, the present invention provides a device and an experimental method for directly performing a fracture simulation experiment on a pipe section. By using the device, the fracture experiment can be safely performed on the pipe section, and the crack growth can be observed in real time. To solve the problems of difficult preparation of conventional pipeline fracture test specimens, large errors, high cost, high risk, etc., and the structure is simple and easy to use

Method used

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  • Two-way driving pipe fracture simulation experiment device and experiment method
  • Two-way driving pipe fracture simulation experiment device and experiment method
  • Two-way driving pipe fracture simulation experiment device and experiment method

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Experimental program
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Embodiment 1

[0024] like Figure 1 to Figure 6 As shown, the two-way hydraulically driven pipeline fracture simulation experiment device includes: pipeline support system 19, pipeline expansion system 18, DIC test system 7, first pull rod 5A, second pull rod 5B, hydraulic cylinder main body 16; The side wall is provided with axially penetrating prefabricated cracks 9, and the prefabricated cracks 9 are symmetrical to the axial middle plane of the experimental pipe section 1; the pipe support system 19 supports both ends of the experimental pipe section 1; the pipe expansion system 18 is composed of the first pull rod 5A and the second pull rod 5B pull and expand the side wall of the experimental pipe section 1, causing the experimental pipe section 1 to break; the hydraulic cylinder main body 16 provides power for the first pull rod 5A and the second pull rod 5B at the same time; the DIC test system 7 tests the experimental pipe section 1 Real-time observation of the fracture process.

[...

Embodiment 2

[0037] like Figure 7 to Figure 10 As shown, the difference between the two-way screw-driven pipeline fracture simulation experiment device and the first embodiment is that the electric motor 24 is used to replace the hydraulic cylinder main body 16, and the first lead screw 23A and the second lead screw 23B are used to replace the first tie rod 5A respectively. , The second pull rod 5B; the first lead screw 23A, the second lead screw 23B and the first tapered block 3A, the second tapered block 3B are connected by thread respectively.

[0038] Experimental methods for pipeline fracture simulation experiments, such as Figure 7 to Figure 10 As shown, the above-mentioned two-way screw-driven pipeline fracture simulation experiment device is different from Embodiment 1 in that during the experiment, the motor 23 converts the rotational motion into the first conical block 3A and the second conical block 3B. Rotational movement around the axial direction and linear movement outwar...

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Abstract

The invention relates to a bi-directional driving type pipeline fracture simulation experiment device, which comprises a pipeline support system, a pipeline expansion support system and a DIC test system, wherein an axial penetrating precast crack is formed in the side wall of an experiment pipe section; the precast crack is symmetrical about the axial middle surface of the experiment pipe section; the pipeline support system supports the two ends of the experiment pipe section; the pipeline expansion support system performs expansion support on the side wall of the experiment pipe section through pull rod or lead screw traction, so that the experiment pipe section fracture is caused; the DIC test system observes the fracture process of the experiment pipe section in real time. The bi-directional driving type pipeline fracture simulation experiment device has the advantages that an experiment test specimen is a full-scale pipeline test specimen, and is directly cut from the pipeline; the error is reduced; the data reliability is ensured; a hydraulic cylinder or an electric motor driving device is used for experiment; the work risk is reduced; the cost is reduced; the opening speed of a fan-shaped block can be controlled by controlling the moving speed of a pull rod and a lead screw; meanwhile, the expansion speed of the crack is controlled; the accuracy of the obtained data is guaranteed.

Description

technical field [0001] The invention belongs to the field of pipeline design and manufacture, and in particular relates to a two-way driving type pipeline fracture simulation experiment device and an experiment method. Background technique [0002] Pipeline fracture experiments have an important application in determining the fracture characteristics of pipelines. At present, pipeline fracture experiments can be divided into small laboratory experiments, large laboratory experiments and actual structural experiments. Small-scale laboratory experiments include: three-point bending test, compact tensile test and drop weight test, etc. Small-scale laboratory experiments use small specimens to study fracture characteristics. There are dimensional errors and constraint errors between pipe specimens and actual pipes, which affect Judgment and understanding of pipeline fracture characteristics; large-scale laboratory experiments such as wide-plate tests require extremely high loadi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01N3/10
Inventor 衣海娇甄莹曹宇光张士华宋明贺娅娅
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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