Unlock instant, AI-driven research and patent intelligence for your innovation.

Pressure Expansion Pipeline Fracture Simulation Experimental Device and Experimental Method

A simulated experimental device and expansion technology, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the problems of difficult preparation, high risk and high cost of pipeline fracture test specimens, so as to reduce work risks and reduce Cost, the effect of reducing size error

Active Publication Date: 2019-09-06
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF3 Cites 0 Cited by
  • Summary
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pressure Expansion Pipeline Fracture Simulation Experimental Device and Experimental Method
  • Pressure Expansion Pipeline Fracture Simulation Experimental Device and Experimental Method
  • Pressure Expansion Pipeline Fracture Simulation Experimental Device and Experimental Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as Figure 1 to Figure 4 As shown, the water pressure expansion pipe fracture simulation experiment device includes: a pipe support system 18, a pipe expansion system 19, a first power system 8A, and a DIC test system 4; the pipe support system 18 supports both ends of the experimental pipe section 1 ; The side wall of the experimental pipe section 1 is provided with an axially penetrating prefabricated crack 14, and the prefabricated crack 14 is symmetrical about the axial middle plane of the experimental pipe section 1; The water pressure causes the prefabricated crack 14 to expand; the first power system 8A provides hydraulic power for the pipe expansion system 19; the DIC test system 4 observes the fracture process of the experimental pipe section 1 in real time.

[0023] Pipe support system 18, including: left upper collar 22A, left lower collar 23A, right upper collar 22B, right lower collar 23B, first rubber collar 24A, second rubber collar 24B; left upper c...

Embodiment 2

[0032] Such as Figure 5 to Figure 8 As shown, the difference between the gas pressure expansion pipeline fracture simulation experiment device and the first embodiment is that the second power system 8B is used to replace the first power system 8A; the second power system 8B includes: an inflator 11, an air extractor 12. The inflator 11 is connected to the air bag 2 through the input pipe 21 to provide air pressure; the air extractor 12 is connected to the air bag 2 through the output pipe 21 to discharge gas.

[0033] The experimental method of the pipeline fracture simulation experiment adopts the above-mentioned air pressure expansion type pipeline fracture simulation experiment device, and the difference from the first embodiment is that the first valve 9A is opened, the second valve 9B is closed, and the inflator 11 and the air pump The machine 12 is connected to the input pipe 21 and the output pipe 5. During the experiment, the inflator 11 is turned on, and the air bag...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a pressure expansion-type pipe fracture simulation experiment device. The device comprises a pipe support system, a pipe expansion system, a power system and a DIC test system. The pipe support system supports both ends of a test pipe section. The side wall of the test pipe section is provided with axial penetration precracks. The precracks are symmetrical relative to the axial middle surface of the test pipe section. The pipe expansion system is located at the middle of the test pipe section and applies expansion pressure to the test pipe section to cause precrack expansion. The power system provides pressure power for the pipe expansion system. The DIC test system can carry out real-time observation of the test pipe section in fracture. Compared with the prior art, the device utilizes a pressure driver so that a work rick is reduced and a cost is reduced. In an experiment, through control of an airbag expansion speed, a crack expansion rate is controlled and data accuracy is guaranteed. The gasbag has the enough length so that in expansion, the gasbag uniformly contacts with the pipe wall and thus the cracks are stably expanded in the experiment process.

Description

technical field [0001] The invention belongs to the field of pipeline design and manufacture, and in particular relates to a pressure expansion 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 lo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/12
Inventor 曹宇光衣海娇甄莹孙永泰徐国强辛露
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)