CN212807416U

CN212807416U - Ultrasonic probe fixer for monitoring petroleum pipeline compression stress

Info

Publication number: CN212807416U
Application number: CN202021147587.6U
Authority: CN
Inventors: 韩佩; 路浩; 邢晓芳; 邢立伟
Original assignee: Xian Shiyou University
Current assignee: Xian Shiyou University
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-03-26
Anticipated expiration: 2030-06-19

Abstract

An ultrasonic probe fixer for monitoring the pressurizing stress of a petroleum pipeline is characterized in that a probe placing part is respectively connected with a magnetic suction seat through hinges at two ends; a U-shaped groove is formed in the central line part of the probe placing part; a fastening screw B is arranged on the side surface of the U-shaped groove, and a fastening screw A is arranged on the upper part of the U-shaped groove; the HX711 pressure sensor module is arranged in the U-shaped groove; during operation, wipe suitable amount of ultrasonic wave couplant ON the point of maring and probe, ON the knob that attracts the seat with magnetic force turned to ON shelves, turned to curved magnetic surface and faced the pipeline direction, put into the probe and place the department, lightly press the probe in the point department of maring again, ON the knob that attracts ON the seat with magnetic force turned to OFF again, make the firm absorption of magnetic force seat ON the pipeline, rotatory fastening screw A, fastening screw B make the gasket hug closely ultrasonic probe, step 4: adjusting the HX711 pressure sensor to enable the ultrasonic probe to be subjected to constant pressure; the method has the advantages of improving the accuracy and efficiency of ultrasonic determination of residual stress.

Description

Ultrasonic probe fixer for monitoring petroleum pipeline compression stress

Technical Field

The utility model belongs to the technical field of the sensor clamping, a petroleum pipeline residual stress test is related to, concretely relates to ultrasonic probe fixer for petroleum pipeline suppresses stress monitoring.

Background

The residual stress is taken as an internal stress, the influence of the internal stress on various properties of materials is more and more concerned, and the reduction and control of the residual stress of the oil gas transmission welded pipe are an important direction for improving the quality of the welded pipe by manufacturers. The detection of residual stress has been carried out for many years both at home and abroad, and the measuring method can be divided into a mechanical measuring method and a physical measuring method. The most used mechanical methods are the blind hole method, and the blind hole method requires drilling on the surface of a test piece, so the blind hole method is also called a destructive testing method, and the ultrasonic method belonging to a physical measurement method is a nondestructive testing method. The ultrasonic method for measuring the residual stress can protect the surface of a test piece, and is also the best measuring method in the development prospect at present. The prior ultrasonic probe has the following problems in the application process:

1) the stress of the ultrasonic probe is not constant;

2) one device cannot adapt to a plurality of petroleum pipelines with different pipe diameters;

3) the pipe cannot adapt to the curved surface of the pipeline;

4) the probe level cannot be monitored automatically.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide an ultrasonic probe fixer for monitoring the pressurizing stress of a petroleum pipeline, wherein a magnetic suction seat at the bottom of the ultrasonic probe fixer can firmly fix a probe on an object to be detected and is not easy to move; the fastening screw and the pressure sensor device on the top of the ultrasonic probe fixer can ensure that the contact surface of the probe and the object to be detected is uniformly stressed; the curved surface of the inner side of the magnetic suction seat can adapt to different curved surfaces of pipelines. Therefore, the utility model has the characteristics of improve ultrasonic determination residual stress accuracy and efficiency.

In order to realize the purpose, the utility model discloses a technical scheme is:

an ultrasonic probe fixer for monitoring the pressurizing stress of a petroleum pipeline comprises a magnetic suction seat, wherein a probe placing part is respectively connected with the magnetic suction seat through hinges at two ends; a U-shaped groove is formed in the central line part of the probe placing part; a fastening screw B is arranged on the side surface of the U-shaped groove, and a fastening screw A is arranged on the upper part of the U-shaped groove; the HX711 pressure sensor module is arranged in the U-shaped groove, and the two magnetic suction seats are provided with a rotating button for controlling magnetism and a curved magnetic surface.

The fastening screw A and the fastening screw B are matched with the gasket for use.

The utility model has the advantages that:

the structure solves the problems that the stress of the ultrasonic probe is not constant, one device cannot adapt to petroleum pipelines with a plurality of pipe diameters of different sizes, cannot adapt to curved surfaces of the pipelines and the like.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a HX711 pressure sensor module of the present invention;

FIG. 3 is a diagram of hydraulic blasting dynamic stress without an ultrasonic probe holder installed;

FIG. 4 is a diagram of hydraulic blasting dynamic stress when an ultrasonic probe holder is installed;

wherein, 1 is a probe placing component; 2 is a fastening screw A; 3 is a fastening screw B; 4 is a hinge; 5 is a magnetic suction seat; 6 is a curved magnetic surface; 7 is a rotary button; and 8 is an HX711 pressure sensor module.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, an ultrasonic probe fixer for monitoring the pressure stress of a petroleum pipeline comprises a magnetic suction seat 5, wherein a probe placing part 1 is respectively connected with the magnetic suction seat 5 through hinges 4 at two ends; a U-shaped groove 9 is formed in the central line part of the probe placing part 1; a fastening screw B3 is arranged on the side surface of the U-shaped groove, and a fastening screw A2 is arranged on the upper part of the U-shaped groove; the HX711 pressure sensor module 8 is arranged in the U-shaped groove 9, and the two magnetic suction seats 5 are provided with a rotary button 7 for controlling magnetism and a curved magnetic surface 6.

The fastening screw A2 and the fastening screw B3 are used in combination with a gasket.

The application of the ultrasonic probe fixer for monitoring the pressure stress of the petroleum pipeline is characterized by comprising the following steps:

step 1: smearing a proper amount of ultrasonic coupling agent on the calibrated point and the probe;

step 2: turning a rotating button 7 of the magnetic suction seat 5 to an ON gear, and turning a curved magnetic surface 6 to face the direction of the pipeline;

and step 3: placing the probe into the probe placing part 1, slightly pressing the probe at a calibrated point, turning OFF a rotating button 7 on a magnetic suction seat 5 to enable the magnetic suction seat to be firmly sucked on a pipeline, and rotating a fastening screw A2 and a fastening screw B3 to enable a gasket to be tightly attached to the ultrasonic probe;

and 4, step 4: the HX711 pressure transducer 8 is adjusted to subject the ultrasound probe to a constant pressure.

Examples

As shown in figures 3 and 4, the high-steel-grade pipeline is subjected to a pressure test in an axial strong constraint state, plugging plates with the thickness of 100mm are welded at two ends of the pipe to carry out strong constraint, and a welding frame on the outer wall of the pipe is constrained.

Fig. 3 is a diagram of hydraulic blasting dynamic stress when the ultrasonic probe holder is not installed, and fig. 4 is a diagram of hydraulic blasting dynamic stress when the ultrasonic probe holder is installed. It can be seen that the curve B1 in FIG. 3 is an uneven interface between the ultrasonic probe and the petroleum pipeline because the ultrasonic probe holder is not installed.

The hydrostatic test fluctuating stress detection curve is shown in fig. 4. The P-T curve in the figure is a pressure control curve and is measured by a pressure sensor of a water pump water inlet device. A1 and B1 correspond to the variation of the axial stress of the pressing of the tube body, and A2, B2 and C2 correspond to the variation of the circumferential stress of the pressing of the tube body.

The change rule of the first hydrostatic test is summarized as follows:

1) the hoop stress B2> C2> A2, the absolute value of the stress peak value reached by the middle observation point B2 is the highest, the stress peak value of the end part C2 is higher than that of the A2, the axial direction shows a certain restrained state, and the restraining effect of the side A of the end part is stronger;

2) axial stress B1< A1, and the peak value of the axial stress is very low, which shows that the axial direction is strongly restrained;

3) the values of the fluctuating stresses at the end observation points a1 and a2 are approximately 1.5 times in relation to each other.

Claims

1. An ultrasonic probe fixer for monitoring the pressurizing stress of a petroleum pipeline comprises a magnetic suction seat (5), and is characterized in that a probe placing part (1) is respectively connected with the magnetic suction seat (5) through hinges (4) at two ends; a U-shaped groove (9) is formed in the central line part of the probe placing part (1); a fastening screw B (3) is arranged on the side surface of the U-shaped groove, and a fastening screw A (2) is arranged on the upper part of the U-shaped groove; the HX711 pressure sensor module (8) is arranged in the U-shaped groove (9), and the two magnetic suction seats (5) are provided with a rotating button (7) for controlling magnetism and a curved magnetic surface (6).

2. The ultrasonic probe holder for monitoring the pressure stress of the petroleum pipeline as recited in claim 1, wherein said fastening screw a (2) and said fastening screw B (3) are used in combination with a gasket.