CN114526995B - Pipeline magnetization simulation detection system under action of composite load - Google Patents

Pipeline magnetization simulation detection system under action of composite load Download PDF

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Publication number
CN114526995B
CN114526995B CN202210425492.3A CN202210425492A CN114526995B CN 114526995 B CN114526995 B CN 114526995B CN 202210425492 A CN202210425492 A CN 202210425492A CN 114526995 B CN114526995 B CN 114526995B
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test piece
tubular test
load
plug
tubular
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CN114526995A (en
Inventor
罗旭
曹书峰
王丽红
董学成
刘清友
邓星桥
李理
干卓凡
罗晓龙
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Chengdu Univeristy of Technology
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Chengdu Univeristy of Technology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12—Pressure testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0003—Steady
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0017—Tensile
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0021—Torsional
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0026—Combination of several types of applied forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/0042—Pneumatic or hydraulic means
    • G01N2203/0048—Hydraulic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/005—Electromagnetic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/022—Environment of the test
    • G01N2203/0236—Other environments
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0262—Shape of the specimen
    • G01N2203/0274—Tubular or ring-shaped specimens
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/0617—Electrical or magnetic indicating, recording or sensing means
    • G01N2203/0635—Electrical or magnetic indicating, recording or sensing means using magnetic properties
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0676—Force, weight, load, energy, speed or acceleration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0682—Spatial dimension, e.g. length, area, angle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Abstract

The application relates to the technical field of stress and magnetic field detection, in particular to a pipeline magnetization simulation detection system under the action of a composite load, which comprises a magnetic field generation assembly, a load loading assembly and a detection assembly; the magnetic field generating assembly is used for forming an excitation magnetic field; the load loading assembly is used for clamping the tubular test piece, the tubular test piece clamped by the load loading assembly is positioned in the excitation field, and the load loading assembly is also used for applying one or more of a torsional load, a tension and compression load and an internal pressure load to the tubular test piece; the detection assembly is used for detecting the stress and the strain of the tubular test piece under the coupling action of the magnetic field and the stress and the magnetic field parameters on the surface of the tubular test piece. The pipeline magnetization simulation detection system under the action of the composite load can simulate a magnetic field and apply one or more of a torsion load, a tension and compression load and an internal pressure load to the tubular test piece, so that the detection requirements of simulating the coupling rule of the magnetic field and the stress under the composite load condition and different magnetic field intensity conditions can be met.

Description

Pipeline magnetization simulation detection system under action of composite load
Technical Field
The application relates to the technical field of stress and magnetic field detection, in particular to a pipeline magnetization simulation detection system under the action of a composite load.
Background
At present, with the progress and development of science and technology and the deepening of research on electromagnetic theory, the force magnetic coupling detection law of stress and magnetic field in the fields of building, civil engineering, pipeline oil and gas transportation, aerospace and the like has attracted great attention.
Research and analysis show that at present, most of existing force magnetic coupling test devices at home and abroad under stress conditions are force magnetic coupling test devices under simulated simple load conditions, and the test devices can only apply relatively simple loads to tubular test pieces. Under the condition of actual working conditions, the stress of an object is often the composite superposition of various loads, and the conventional measuring device cannot correctly summarize the change rule of stress and a magnetic field during the magnetic coupling of force under the working conditions.
Therefore, in order to simulate the force magnetic coupling condition under the actual complex working condition, the novel force magnetic coupling testing device must be capable of carrying out the composite loading of the load to simulate the actual loading condition of the object during the actual measurement, so as to carry out more accurate and actual measurement on the change of the spatial magnetic field around the measured object, and finally find the actual change rule of the stress and the magnetic field during the force magnetic coupling.
Disclosure of Invention
The application provides a pipeline magnetization simulation detecting system under the action of composite load to improve the problems.
The invention is particularly such that:
a pipeline magnetization simulation detection system under the action of a composite load comprises a magnetic field generation assembly, a load loading assembly and a detection assembly; the magnetic field generating assembly is used for forming an excitation magnetic field; the load loading assembly is used for clamping the tubular test piece, the tubular test piece clamped by the load loading assembly is positioned in the excitation field, and the load loading assembly is also used for applying one or more of a torsional load, a tension and compression load and an internal pressure load to the tubular test piece; the detection assembly is used for detecting the stress and the strain of the tubular test piece under the coupling action of the magnetic field and the stress and the magnetic field parameters on the surface of the tubular test piece.
In one embodiment of the invention, the magnetic field generation assembly comprises a direct current excitation power supply, a bottom plate, a limiting block and two coil units;
the two coil units comprise coils, coil disks and supporting seats, the supporting seats are connected with the bottom plate, the coil disks are connected with the supporting seats, and the coils are wound on the coil disks; the two coil panels are arranged at intervals, and the limiting block is positioned between the two coil panels and connected with the two coil panels;
the two coils are electrically connected with a direct current excitation power supply, and the two coil units are used for forming an excitation magnetic field in a conductive state.
In one embodiment of the present invention, the load loading assembly includes a fixing plate, a clamping unit, a torque loading unit, a tension and compression loading unit, and an internal pressure loading unit;
the fixing plate is connected with the bottom plate through a plurality of pillars, and the fixing plate is parallel to and spaced from the bottom plate; the fixing plate is provided with a containing groove for the coil unit to pass through;
the clamping unit is connected with the fixing plate and is used for clamping the tubular test piece; the torque loading unit is connected with the fixing plate and is used for applying a torsional load to the tubular test piece; the tension and compression loading unit is connected with the fixing plate and is used for applying tension and compression load to the tubular test piece; the internal pressure loading unit is connected to the fixed plate and is used for applying an internal pressure load to the tubular shape.
In an embodiment of the present invention, the clamping unit includes a first plug and a second plug, the first plug is connected to the fixing plate, and the second plug is slidably connected to the fixing plate; and two ends of the tubular test piece are respectively connected with the first plug and the second plug.
In one embodiment of the invention, the first plug and the second plug are both in threaded connection with the tubular test piece; the first plug and the second plug respectively comprise a main body, a movable block, a movable shaft, two thread blocks and two connecting pieces;
the main body is provided with a through movable cavity along the axis direction of the tubular test piece; the movable block is in threaded connection with one end of the movable cavity, which is away from the tubular test piece; the two thread blocks are symmetrically and rotatably connected with the movable cavity along the axis of the tubular test piece, the two thread blocks are positioned at one end of the movable cavity close to the tubular test piece, and the outer peripheral surfaces of the two thread blocks are provided with external threads matched with the tubular test piece in a threaded manner; the movable shaft extends along the axial direction of the tubular test piece, and one end of the movable shaft close to the movable block is rotatably connected with the movable block around the axial line of the movable shaft; one ends of the two connecting pieces are rotatably connected with one end of the movable shaft close to the tubular test piece, and the other ends of the two connecting pieces are respectively rotatably connected with the inner peripheral surfaces of the two thread blocks; the movable block is used for rotating relative to the main body under the action of external force so as to drive the movable shaft to move along the axis of the tubular test piece, and further drive the two connecting pieces to expand or contract, so that the two threaded blocks are driven to move to a first position or a second position;
when the two thread blocks move to the first position, the two thread blocks are outwards expanded and are both used for being in thread fit with the tubular test piece; when the two thread blocks move to the second position, the two thread blocks are retracted and are separated from the thread fit with the tubular test piece;
the first plug and the second plug respectively comprise a guide piece arranged in the movable cavity and a sealing piece positioned at one end of the main body close to the tubular test piece; the guide piece is used for guiding the movable shaft to move along the axial direction of the tubular test piece, and the sealing piece is used for plugging the end part of the tubular test piece.
In one embodiment of the present invention, the torque loading unit includes a first motor, a worm wheel, and two limit pins;
the first motor is connected with the fixing plate, the worm is in transmission connection with the output end of the first motor, and the worm is meshed with the worm wheel; the first plug is a square body; the turbine is connected with the first plug and provided with a square hole matched with the first plug; the two limiting pins are connected with the first plug, and the two limiting pins are located on two sides of the turbine along the axis of the tubular test piece so as to limit the sliding of the turbine relative to the first plug;
the first motor is used for driving the worm to rotate so as to drive the turbine to rotate, and then the tubular test piece is driven to twist around the axis of the tubular test piece.
In one embodiment of the invention, the tension-compression loading unit comprises a hydraulic cylinder, a slide block and a guide table;
the hydraulic cylinder is connected with the fixed platform; the guide table is connected with the fixed table or the bottom plate, a guide groove is formed in the guide table along the axis direction of the tubular test piece, and the sliding block is matched with the guide groove in a sliding mode; along the axial direction of the tubular test piece, two ends of the sliding block are respectively connected with the movable end of the hydraulic cylinder and the second plug;
the hydraulic cylinder is used for driving the sliding block to move along the axis direction of the tubular test piece so as to drive the second plug to move and further pull and press the tubular test piece.
In one embodiment of the invention, the internal pressure loading unit comprises a high-pressure air compression pump and an air guide pipe, the high-pressure air compression pump is connected with the fixed platform or the bottom plate, and two ends of the air guide pipe are respectively communicated with an air outlet end of the high-pressure air compression pump and the tubular test piece;
wherein, the high-pressure air compression pump is used for injecting high-pressure gas into the tubular test piece through the air duct.
In one embodiment of the invention, the detection assembly comprises a gaussmeter, a torque sensor, a tension and compression sensor, a laser displacement sensor, a first movable unit, a detection ring, a second movable unit, a Hall sensor and a laser displacement sensor;
the gaussmeter is connected with the fixed table and used for detecting the space magnetic field intensity around the tubular test piece;
the torque sensor and the tension and compression sensor are arranged at the joint of the tubular test piece and the load loading assembly and are respectively used for detecting the torsional load and the tension and compression load applied to the tubular test piece;
the first movable unit and the second movable unit are connected with the fixed plate or the bottom plate, and the detection ring is connected with the first movable unit and the second movable unit; the detection ring is sleeved on the tubular test piece, the axis of the detection ring is overlapped with the axis of the tubular test piece, and the Hall sensor is connected with the detection ring; the first movable unit is used for driving the detection ring to rotate around the axis of the detection ring, and the second movable unit is used for driving the detection ring to move along the axis of the detection ring;
the laser displacement sensor is connected with the fixing plate and used for detecting the displacement of the tubular test piece.
In one embodiment of the present invention, the first movable unit includes a second motor, a mounting table, a driving gear, a rotating ring, and a first link frame; the mounting table is connected with the fixed plate or the bottom plate, the rotating ring is rotatably connected with the mounting table around the axis of the tubular test piece, and inner teeth are arranged on the inner circumferential surface of the rotating ring; the driving gear is in transmission connection with the output end of the second motor and is internally meshed with the rotating ring; the detection ring is movably connected with the rotating ring along the axis of the tubular test piece through a first connecting frame;
the second movable unit comprises a mounting seat, a sliding table module and a guide piece; the mounting seat is connected with the bottom plate or the mounting seat, the sliding table module is connected with the mounting seat in a sliding mode along the axis direction of the tubular test piece, and the guide piece is connected with the sliding table module; the guide member abuts at least one side of the detection ring in the axial direction of the tubular specimen.
The invention has the beneficial effects that:
the pipeline magnetization simulation detection system under the action of the composite load comprises a magnetic field generation assembly, a load loading assembly and a detection assembly; the magnetic field generating assembly is used for forming an excitation magnetic field; the load loading assembly is used for clamping the tubular test piece, the tubular test piece clamped by the load loading assembly is positioned in the excitation magnetic field, and the load loading assembly is also used for applying one or more of torsional load, tension and compression load and internal pressure load to the tubular test piece; the detection assembly is used for detecting the stress and the strain of the tubular test piece under the coupling action of the magnetic field and the stress and the magnetic field parameters on the surface of the tubular test piece. The invention can apply one or more of torsion load, tension and compression load and internal pressure load to the tubular test piece, thereby meeting the detection requirements of simulating the coupling rule of the magnetic field and the stress under the composite load condition and different magnetic field intensity conditions.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a first view angle of a pipeline magnetization simulation detection system under the action of a composite load according to the present application;
FIG. 2 is a schematic structural diagram of a second view angle of the pipeline magnetization simulation detection system under the action of a composite load according to the present application;
FIG. 3 is a schematic structural diagram of a magnetic field generating assembly provided herein;
FIG. 4 is a schematic structural view of the load loading assembly, the detecting assembly, the bottom plate and the fixing plate provided in the present application;
FIG. 5 is a schematic structural view of a load applying assembly and a detecting assembly provided herein;
fig. 6 is a schematic structural view of the first plug provided in the present application when the first plug is located at the first position;
fig. 7 is a schematic structural view of the first plug provided in the present application when the first plug is located at a second position;
FIG. 8 is a schematic structural diagram of a torque loading unit provided herein;
fig. 9 is a schematic structural diagram of a pull-press loading unit and an internal pressure loading unit provided in the present application;
FIG. 10 is a schematic structural diagram of a first movable unit provided herein;
fig. 11 is a schematic structural diagram of a second movable unit provided in the present application.
Icon: 10-a pipeline magnetization simulation detection system under the action of a composite load; 100-a magnetic field generating assembly; 200-a load-loading assembly; 300-a detection component; 20-a tubular specimen; 101-a direct current excitation power supply; 102-a backplane; 103-a limiting block; 104-a coil unit; 105-a coil; 106-coil disk; 107-support seat; 210-a fixed plate; 220-a clamping unit; 230-a torque loading unit; 240-a pull-press loading unit; 250-internal pressure loading unit; 211-a receiving groove; 221-a first plug; 222-a second plug; 223-a main body; 224-active block; 225-a movable shaft; 226-thread block; 227-a connecting member; 228-an active cavity; 229-a guide; 2201-sealing member; 2202-fixed seat; 231-a first motor; 232-worm; 233-a turbine; 234-a spacing pin; 241-hydraulic cylinder; 242-a slider; 243-guide table; 251-a high pressure air compressor pump; 252-an airway tube; 310-gauss meter; 320-a torque sensor; 330-a tension and compression sensor; 340-laser displacement sensor; 350 — a first active unit; 360-detection loop; 370-a second active unit; 380-hall sensor; 351-a second motor; 352-mounting table; 353-driving the gear; 354-a rotating ring; 355-a first link; 356-slide bar; 357-connecting rod; 371-mount pad; 372-a slipway module; 373-a guide; 374-a guide portion; 375-guide bar; 341-auxiliary measurement Panel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1-4, an embodiment of the invention provides a pipeline magnetization simulation detection system 10 under a combined load, which includes a magnetic field generating assembly 100, a load loading assembly 200, and a detection assembly 300; the magnetic field generating assembly 100 is used for forming an excitation magnetic field; the load loading assembly 200 is used for clamping the tubular test piece 20, the tubular test piece 20 clamped by the load loading assembly 200 is positioned in an excitation magnetic field, and the load loading assembly 200 is also used for applying one or more of a torsional load, a tensile and compressive load and an internal pressure load to the tubular test piece 20; the detection assembly 300 is used to detect the stress, strain and magnetic field parameters of the surface of the tubular specimen 20 under the coupling action of the magnetic field and the stress on the tubular specimen 20.
Referring to fig. 1-4, the working principle of the pipeline magnetization simulation detection system 10 under the action of the composite load is as follows:
the pipeline magnetization simulation detection system 10 under the action of the composite load comprises a magnetic field generation assembly 100, a load loading assembly 200 and a detection assembly 300;
wherein the magnetic field generating assembly 100 is used for forming an excitation magnetic field; the load loading assembly 200 is used for clamping the tubular test piece 20, the tubular test piece 20 clamped by the load loading assembly 200 is positioned in an excitation magnetic field, and the load loading assembly 200 is further used for applying one or more of a torsional load, a tensile and compressive load and an internal pressure load to the tubular test piece 20;
thus, by clamping the tubular specimen 20 to the load application assembly 200 and applying one or more of a torsional load, a tensile load, and an internal pressure load to the tubular specimen 20 by the load application assembly 200, in the case where the load application assembly 200 applies a plurality of torsional loads, tensile loads, and internal pressure loads to the tubular specimen 20, a composite load can be applied to the tubular specimen 20 located in the excitation magnetic field, and at this time, the stress, strain, and surface magnetic field parameters of the tubular specimen 20 under the magnetic field and stress coupling effect can be detected by the detection assembly 300.
In summary, the present invention can apply one or more of a torsional load, a tensile load, and an internal pressure load to the tubular test piece 20, so as to meet the detection requirements of simulating the magnetic field and stress coupling law under the composite load condition and different magnetic field strength conditions.
Further, referring to fig. 3, in the present embodiment, the magnetic field generating assembly 100 is disposed, the magnetic field generating assembly 100 is used for forming a magnetic field, and the strength of the magnetic field is adjusted according to the detection requirement in the process of simulating the detection; specifically, the magnetic field generating assembly 100 includes a dc excitation power source 101, a bottom plate 102, a limiting block 103, and two coil units 104;
the two coil units 104 respectively comprise a coil 105, a coil panel 106 and a support seat 107, the support seat 107 is connected with the bottom plate 102, the coil panel 106 is connected with the support seat 107, and the coil 105 is wound on the coil panel 106; the two coil panels 106 are arranged at intervals, and the limiting block 103 is positioned between the two coil panels 106 and connected with the two coil panels 106;
wherein, the two coils 105 are electrically connected with the dc excitation power source 101 through power lines, and the two coil units 104 are used for forming an excitation magnetic field in a conductive state.
Further, referring to fig. 1 to 11, in the present embodiment, the load loading assembly 200 is used for clamping the tubular specimen 20 and applying a composite load to the tubular specimen 20; during the test, a single load may be applied to the tubular specimen 20 according to the test requirements.
Referring to fig. 4 to 5 in combination with fig. 1 to 3, the load loading assembly 200 includes a fixing plate 210, a clamping unit 220, a torque loading unit 230, a tension/compression loading unit 240, and an internal pressure loading unit 250; the fixing plate 210 is connected to the base plate 102 by a plurality of pillars, and the fixing plate 210 is parallel to and spaced apart from the base plate 102; the fixing plate 210 is provided with a containing groove 211 for the coil unit 104 to pass through; the clamping unit 220 is connected with the fixing plate 210 and is used for clamping the tubular test piece 20; the torque loading unit 230 is connected to the fixing plate 210, and is used to apply a torsional load to the tubular test piece 20; the tension and compression loading unit 240 is connected with the fixing plate 210 and is used for applying tension and compression load to the tubular specimen 20; the internal pressure loading unit 250 is connected to the fixed plate 210 and serves to apply an internal pressure load to the tubular shape.
Therefore, when the tubular test piece 20 is clamped by the clamping unit 220, the tubular test piece 20 is arranged relative to the accommodating groove 211, so that the tubular test piece 20 clamped by the clamping unit 220 can be located in the excitation field, and in order to avoid interference among structures in the detection process, part of the structure of the load loading assembly 200 and part of the structure of the detection assembly 300 are arranged relative to the edge around the accommodating groove 211.
Referring to fig. 4 to 7 in combination with fig. 1 to 3, the clamping unit 220 includes a first plug 221 and a second plug 222, the first plug 221 is connected to the fixing plate 210, and the second plug 222 is slidably connected to the fixing plate 210; the two ends of the tubular specimen 20 are connected to the first plug 221 and the second plug 222, respectively. It should be noted that, when the first plug 221 is installed, in order to prevent the position of the first plug 221 from changing during the detection process, the fixing plate 210 is provided with a fixing base 2202 detachably connected to the first plug 221; after the first plug 221 and the second plug 222 are connected to the tubular specimen 20, the inner cavity of the tubular specimen 20 can be sealed to prevent the problem of pressure release inside the tubular specimen 20.
When the first plug 221 and the second plug 222 are connected with the tubular test piece 20, both the first plug 221 and the second plug 222 can be in threaded connection with the tubular test piece 20; specifically, each of the first plug 221 and the second plug 222 includes a main body 223, a movable block 224, a movable shaft 225, two threaded blocks 226, and two connecting members 227;
the main body 223 is provided with a through movable cavity 228 along the axial direction of the tubular test piece 20; the movable block 224 is in threaded connection with the end of the movable cavity 228 facing away from the tubular trial 20; the two thread blocks 226 are symmetrically and rotatably connected with the movable cavity 228 along the axis of the tubular test piece 20, the two thread blocks 226 are located at one end of the movable cavity 228 close to the tubular test piece 20, and the outer peripheral surfaces of the two thread blocks 226 are both provided with external threads for being in threaded fit with the tubular test piece 20; the movable shaft 225 extends along the axial direction of the tubular trial 20, and one end of the movable shaft 225 near the movable block 224 is rotatably connected with the movable block 224 around the axis thereof; one end of each of the two connecting pieces 227 is rotatably connected with one end of the movable shaft 225 close to the tubular specimen 20, and the other end of each of the two connecting pieces 227 is rotatably connected with the inner peripheral surfaces of the two thread blocks 226; the movable block 224 is used for rotating relative to the main body 223 under the action of external force to drive the movable shaft 225 to move along the axis of the tubular test piece 20, and further drive the two connecting pieces 227 to expand outwards or contract inwards, so as to drive the two threaded blocks 226 to move to the first position or the second position;
when the two threaded blocks 226 are moved to the first position, the two threaded blocks 226 are flared and both are used to threadedly mate with the tubular trial 20; when the two screw blocks 226 move to the second position, the two screw blocks 226 are retracted and disengaged from the threaded fitting with the tubular test piece 20;
the first plug 221 and the second plug 222 each further include a guide 229 disposed within the movable cavity 228 and a seal 2201 disposed at an end of the body 223 proximate to the tubular test piece 20; the guide 229 serves to guide the movable shaft 225 to move in the axial direction of the tubular specimen 20, and the seal 2201 serves to close off the end of the tubular specimen 20.
Therefore, with the above-mentioned structure, when the first plug 221 and the second plug 222 need to be connected to the tubular specimen 20, the two screw blocks 226 are located at the second position, and the movable block 224 is rotated, so that the movable shaft 225 connected to the movable block 224 moves along the axis of the tubular specimen 20 under the action of the guide 229, and further drives the two connecting pieces 227 to expand, thereby driving the two screw blocks 226 to move to the first position, and further enabling the two screw blocks to be connected to the tubular specimen 20 in a threaded manner, and since the main body 223 is provided with the sealing piece 2201 near one end of the tubular specimen 20, the sealing piece 2201 is abutted against the tubular specimen 20, so that the end of the tubular specimen 20 can be plugged.
It should be noted that, in order to facilitate the rotation of the movable block 224, a square hole is disposed at one end of the movable block 224 away from the tubular specimen 20; when the two threads are located at the first position, the two thread blocks 226 can be in thread fit with the tubular test piece 20, and when the two threads are located at the second position, the two thread blocks 226 can be disengaged from the tubular test piece 20, so that in the detection process, the tubular test piece 20 can be deformed due to a composite load, and in order to avoid the situation that the tubular test piece 20 is jammed with the first plug 221 and the second plug 222 due to deformation, the movable shaft 225 can be driven to move through the movement of the movable block 224, so that the two thread blocks 226 are driven to move from the first position to the second position through the connecting piece 227, the tubular test piece 20 can be quickly taken down from the clamping unit 220, and the situation that the tubular test piece 20 and the thread blocks 226 are jammed and cannot be taken down due to deformation of the tubular test piece 20 can be avoided.
In addition, according to the above arrangement, when the first plug 221 is connected to the holder 2202, the holder 2202 is connected to the main body 223 of the first plug 221;
in addition, the arrangement mode can also play a role of positioning the tubular test piece 20 through the arrangement of the two screw blocks 226 of the first plug 221 and the second plug 222, so as to position the axis of the tubular test piece 20 in the process of installing the tubular test piece 20.
In summary, the first plug 221 and the second plug 222 are arranged, so that the tubular test piece 20 and the clamping unit 220 can be quickly mounted and dismounted, and when the tubular test piece 20 is positioned, the phenomenon that the joint of the tubular test piece 20 and the clamping unit 220 is blocked due to deformation of the tubular test piece 20 can be avoided.
Referring to fig. 8 in combination with fig. 1 to 7, when the torque loading unit 230 is disposed, the torque loading unit 230 includes a first motor 231, a worm 232, a worm wheel 233 and two limit pins 234; the first motor 231 is connected with the fixing plate 210, the worm 232 is in transmission connection with the output end of the first motor 231, and the worm 232 is meshed with the worm wheel 233; the first plug 221 is a square body; the turbine 233 is connected with the first plug 221, and the turbine 233 is provided with a square hole matched with the first plug 221; the two limit pins 234 are connected with the first plug 221, and the two limit pins 234 are located on two sides of the turbine 233 along the axis of the tubular test piece 20 to limit the sliding of the turbine 233 relative to the first plug 221; the first motor 231 is configured to drive the worm 232 to rotate, so as to drive the worm wheel 233 to rotate, and further drive the tubular specimen 20 to twist around the axis thereof. It should be noted that, when the first motor 231 is in transmission connection with the worm 232, the worm 232 may be in transmission connection with the output end of the first motor 231 through a coupler, and one end of the worm 232 may be in connection and fit with the coupler through a key slot, and the other end thereof is engaged with the worm wheel;
thus, with such an arrangement, the worm 232 and the worm wheel 233 can be rotated by the rotation of the first motor 231, and the first plug 221 connected to the worm wheel 233 and the tubular specimen 20 can be twisted.
Referring to fig. 9 in combination with fig. 1 to 8, when the pull/press loading unit 240 is disposed, the pull/press loading unit 240 includes a hydraulic cylinder 241, a slider 242 and a guide platform 243; the hydraulic cylinder 241 is connected with the fixed table; the guide table 243 is connected with the fixed table or the base plate 102, a guide groove is formed in the guide table 243 along the axial direction of the tubular test piece 20, and the sliding block 242 is matched with the guide groove in a sliding manner; along the axial direction of the tubular test piece 20, two ends of the sliding block 242 are respectively connected with the movable end of the hydraulic cylinder 241 and the second plug 222; the hydraulic cylinder 241 is configured to drive the slider 242 to move along the axial direction of the tubular test piece 20, so as to drive the second plug 222 to move, and further pull and press the tubular test piece 20.
Thus, with such an arrangement, the slider 242 can be driven by the hydraulic cylinder 241 to move along the guide groove, and the second plug 222 connected to the slider 242 can be driven to move along the axial direction of the tubular specimen 20, so that a tensile/compressive load can be applied to the tubular specimen 20 along the axial direction thereof.
Referring to fig. 9 in combination with fig. 1 to 8, when the internal pressure loading unit 250 is disposed, the internal pressure loading unit 250 includes a high-pressure air compression pump 251 and an air duct 252, the high-pressure air compression pump 251 is connected to the fixing table or the bottom plate 102, and two ends of the air duct 252 are respectively connected to an air outlet end of the high-pressure air compression pump 251 and the tubular test piece 20; the high-pressure air compressor pump 251 is used for injecting high-pressure air into the tubular test piece 20 through the air duct 252.
Thus, with this arrangement, high-pressure gas can be injected into the tubular specimen 20 through the gas tube 252 by the high-pressure air compressor 251, and the tubular specimen 20 can maintain its internal pressure because both ends of the tubular specimen 20 are closed by the first plug 221 and the second plug 222.
Further, referring to fig. 1-11, in the present embodiment, the detecting assembly 300 includes a gaussmeter 310, a torque sensor 320, a tension/compression sensor 330, a laser displacement sensor 340, a first movable unit 350, a detecting ring 360, a second movable unit 370, a hall sensor 380, and a laser displacement sensor 340;
the gaussmeter 310 is connected with the fixed station and is used for detecting the spatial magnetic field strength around the tubular test piece 20;
the torque sensor 320 and the tension and compression sensor 330 are arranged at the joint of the tubular test piece 20 and the load loading assembly 200, and are respectively used for detecting the torsional load and the tension and compression load applied to the tubular test piece 20; specifically, the torque sensor 320 and the tension/compression sensor 330 are disposed at the connection between the tubular test piece 20 and the first plug 221 and the second plug 222; in addition, in order to facilitate the installation of the torque sensor 320 and the tension/compression sensor 330, the first plug 221 and the second plug 222 are provided with notches for accommodating the torque sensor 320 and the tension/compression sensor 330 and screw holes for fixing the torque sensor 320 and the tension/compression sensor 330 at positions for abutting against the torque sensor 320 and the tension/compression sensor 330.
The first movable unit 350 and the second movable unit 370 are connected with the fixed plate 210 or the bottom plate 102, and the detection ring 360 is connected with the first movable unit 350 and the second movable unit 370; the detection ring 360 is sleeved on the tubular test piece 20, the axis of the detection ring 360 is overlapped with the axis of the tubular test piece 20, and the hall sensor 380 is connected with the detection ring 360; the first movable unit 350 is used for driving the detection ring 360 to rotate around the axis thereof, and the second movable unit 370 is used for driving the detection ring 360 to move along the axis thereof;
the laser displacement sensor 340 is connected to the fixing plate 210, and the laser displacement sensor 340 is used for detecting the displacement of the tubular specimen 20. In order to detect the slight deformation of the tubular specimen 20 caused by the tensile and compressive stresses, the auxiliary measuring plate 341 may be provided on the second plug 222, and the displacement of the tubular specimen 20 may be measured by the difference in the front-rear displacement of the auxiliary measuring plate 341 in the detection area of the laser displacement sensor 340.
Specifically, referring to fig. 9 and 10 in combination with fig. 1 to 8, the first movable unit 350 includes a second motor 351, an installation platform 352, a driving gear 353, a rotating ring 354 and a first connecting frame 355; the mounting table 352 is connected with the fixed plate 210 or the base plate 102, the rotating ring 354 is rotatably connected with the mounting table 352 around the axis of the tubular specimen 20, and the inner circumferential surface of the rotating ring 354 is provided with internal teeth; the driving gear 353 is in transmission connection with the output end of the second motor 351 and is internally meshed with the rotating ring 354; the detection ring 360 is movably connected to the rotating ring 354 along the axis of the tubular specimen 20 by a first link frame 355; it should be noted that the driving gear 353 can be in transmission connection with the output end of the second motor 351 through a coupler and a transmission shaft, and the transmission shaft and the driving gear 353 are in circumferential connection through a key slot;
moreover, when the first connecting frame 355 is arranged, in order to enable the first connecting frame 355 to be movably connected with the rotating ring 354 along the axis of the tubular specimen 20, a plurality of through holes are formed in the rotating ring 354 along the axis of the tubular specimen 20, the plurality of through holes are arranged around the axis of the tubular specimen 20, the first connecting frame 355 comprises a plurality of sliding rods 356 and a plurality of connecting rods 357, each sliding rod 356 is correspondingly connected with one connecting rod 357, each sliding rod 356 is correspondingly matched with one through hole in a sliding manner, and the plurality of connecting rods 357 are connected with the detection ring 360, so that the balance of the stress of the detection ring 360 can be ensured by the arrangement;
referring to fig. 10 and fig. 11 in combination with fig. 1 to fig. 9, the second movable unit 370 includes an installation seat 371, a sliding table module 372, and a guide 373; the mounting seat 371 is connected with the base plate 102 or the mounting seat 371, the sliding table module 372 is connected with the mounting seat 371 in a sliding manner along the axial direction of the tubular test piece 20, and the guide part 373 is connected with the sliding table module 372; the guide 373 abuts at least one side of the detection ring 360 in the axial direction of the tubular specimen 20. It should be noted that, in order to enable the guide 373 to be able to move along the axial direction of the tubular test piece 20 by abutting against the detection ring 360, when the sliding table module 372 slides in the direction toward the detection ring 360, the guide 373 abuts against one side of the detection ring 360 facing the sliding table module 372, and when the sliding table module 372 slides in the direction away from the detection ring 360, the guide 373 abuts against one side of the detection ring 360 facing away from the sliding table module 372; and in order to enable the guide 373 to abut against both sides of the detection ring 360, the guide 373 may include a guide rod 375 and a guide portion 374, the guide portion 374 is rotatably connected to the guide rod 375, and the guide rod 375 is disposed along the axial direction of the tubular specimen 20 and connected to the slide table module 372, whereby the position of the guide portion 374 relative to the detection ring 360 can be adjusted by rotation of the guide portion 374 relative to the guide rod 375, so that the position at which the guide portion 374 abuts against the detection ring 360 is adjusted in the process of movement of the slide table module 372.
Based on the above, referring to fig. 1 to 11, the operation of the pipe magnetization simulation detection system 10 under the action of the combined load is as follows:
firstly, installing a tubular test piece 20 to be tested in the pipeline magnetization simulation detection system 10 under the action of the composite load, specifically, connecting the tubular test piece 20 with a first plug 221 and a second plug 222; specifically, the movable block 224 is rotated, so that the two threaded blocks 226 move from the second position to the first position and are in threaded connection with the tubular test piece 20; connecting the main body 223 of the first plug 221 to the fixed seat 2202, and meanwhile, installing the torque sensor 320 at the connection position of the first plug 221 and the fixed seat 2202 so as to detect the torque applied to the tubular test piece 20; meanwhile, the turbine 233 is butted with the plug; connecting the second plug 222 with the slider 242, and arranging the tension and compression sensor 330 at the connection position of the second plug 222 and the slider 242, so as to detect the tension and compression stress applied to the tubular test piece 20;
in operation, the dc excitation power source 101 of the magnetic field generating assembly 100 supplies power to the two coil units 104 and generates a transverse excitation magnetic field inside the two coil units 104.
Then, the load loading assembly 200 starts to work, when the first motor 231 works, the first motor 231 drives the worm 232 to rotate and finally drives the worm wheel meshed with the worm 232 to rotate, the rotation of the worm wheel enables the first plug 221 to be twisted under the action of the worm wheel 232, and finally the tubular test piece 20 connected with the first plug 221 is twisted and deformed;
when the hydraulic cylinder 241 works, the hydraulic cylinder 241 enables the sliding block 242 to slide along the guide groove on the guide table 243, and then to make linear motion along the axial direction of the tubular test piece 20, so that the tubular test piece 20 is subjected to tension or pressure, and finally the tubular test piece 20 is subjected to transverse tension-compression deformation;
when the high-pressure air compression pump 251 works, the high-pressure air compression pump 251 can continuously apply a fixed internal pressure to the interior of the tubular test piece 20 through the air guide pipe 252;
after the load loading assembly 200 applies one or more loads to the tubular specimen 20, the detection assembly 300 starts to detect the tubular specimen 20; it should be noted that, because the torque sensor 320 and the tension and compression sensor 330 are disposed at the connection between the test piece and the load loading assembly 200, when the load loading assembly 200 applies a load, the torque sensor 320 and the tension and compression sensor 330 can synchronously detect the torsional load and the tension and compression load applied to the tubular test piece 20;
during detection, the laser displacement sensor 340 connected to the fixing plate 210 can detect the micro displacement of the tubular test piece 20, and specifically, after the tubular test piece 20 is deformed by the tensile and compressive stress, the displacement of the second plug 222 or the displacement of the tubular test piece 20 can be detected;
subsequently, the second motor 351 works and drives the driving gear 353 to rotate, so as to drive the rotating ring 354 meshed with the driving gear to rotate, further drive the detecting ring 360 connected with the rotating ring 354 to rotate relative to the tubular test piece 20, so as to drive the hall sensor 380 connected with the detecting ring 360 to rotate around the tubular test piece 20, and after the hall sensor 380 rotates around the tubular test piece 20 for one circle; the sliding table module 372 works, and is abutted against the detection ring 360 through the guide part 373 so as to drive the detection ring 360 to displace relative to the rotating ring 354 along the axial direction of the tubular test piece 20, and after the guide part 373 drives the detection ring 360 to move for a short distance; the second motor 351 starts to work, and then the hall sensor 380 continues to rotate around the outer cylindrical surface of the tubular test piece 20, and the above processes are repeated in a circulating way, so that the hall sensor 380 forms a cylindrical spatial magnetic field collecting net around the tubular test piece 20, and the distribution and the variation of the magnetic field in the space are obtained.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (9)

1. The utility model provides a pipeline magnetization simulation detecting system under compound load effect which characterized in that:
the device comprises a magnetic field generating assembly, a load loading assembly and a detection assembly; the magnetic field generating assembly is used for forming an excitation magnetic field; the load loading assembly is used for clamping a tubular test piece, the tubular test piece clamped by the load loading assembly is positioned in the excitation field, and the load loading assembly is also used for applying one or more of a torsional load, a tension and compression load and an internal pressure load to the tubular test piece; the detection assembly is used for detecting the stress and the strain of the tubular test piece under the coupling action of a magnetic field and the stress and the magnetic field parameters on the surface of the tubular test piece;
the detection assembly comprises a gaussmeter, a torque sensor, a tension and compression sensor, a laser displacement sensor, a first movable unit, a detection ring, a second movable unit, a Hall sensor and a laser displacement sensor;
the gaussmeter is connected with the fixed table and is used for detecting the spatial magnetic field intensity around the tubular test piece;
the torque sensor and the tension and compression sensor are arranged at the joint of the tubular test piece and the load loading assembly and are respectively used for detecting a torsional load and a tension and compression load borne by the tubular test piece;
the first movable unit and the second movable unit are connected with the fixed plate or the bottom plate, and the detection ring is connected with the first movable unit and the second movable unit; the detection ring is sleeved on the tubular test piece, the axis of the detection ring is overlapped with the axis of the tubular test piece, and the Hall sensor is connected with the detection ring; the first movable unit is used for driving the detection ring to rotate around the axis of the detection ring, and the second movable unit is used for driving the detection ring to move along the axis of the detection ring;
the laser displacement sensor is connected with the fixing plate and used for detecting the displacement of the tubular test piece.
2. The pipeline magnetization simulation detection system under the action of the composite load according to claim 1, characterized in that:
the magnetic field generating assembly comprises a direct current excitation power supply, a bottom plate, a limiting block and two coil units;
the two coil units respectively comprise a coil, a coil disc and a supporting seat, the supporting seat is connected with the bottom plate, the coil disc is connected with the supporting seat, and the coil is wound on the coil disc; the two coil panels are arranged at intervals, and the limiting block is positioned between the two coil panels and connected with the two coil panels;
the two coils are electrically connected with the direct current excitation power supply, and the two coil units are used for forming the excitation magnetic field in a conductive state.
3. The pipeline magnetization simulation detection system under the action of the composite load according to claim 2, characterized in that:
the load loading assembly comprises a fixing plate, a clamping unit, a torque loading unit, a tension and compression loading unit and an internal pressure loading unit;
the fixing plate is connected with the bottom plate through a plurality of struts, and the fixing plate is parallel to and spaced from the bottom plate; the fixing plate is provided with a containing groove for the coil unit to pass through;
the clamping unit is connected with the fixing plate and is used for clamping the tubular test piece; the torque loading unit is connected with the fixing plate and is used for applying a torsional load to the tubular test piece; the tension and compression loading unit is connected with the fixing plate and is used for applying tension and compression load to the tubular test piece; the internal pressure loading unit is connected to the fixed plate and is configured to apply an internal pressure load to the tubular shape.
4. The pipeline magnetization simulation detection system under the action of the composite load according to claim 3, wherein:
the clamping unit comprises a first plug and a second plug, the first plug is connected with the fixed plate, and the second plug is connected with the fixed plate in a sliding manner; and two ends of the tubular test piece are respectively connected with the first plug and the second plug.
5. The pipeline magnetization simulation detection system under the action of the composite load according to claim 4, characterized in that:
the first plug and the second plug are both in threaded connection with the tubular test piece; the first plug and the second plug respectively comprise a main body, a movable block, a movable shaft, two threaded blocks and two connecting pieces;
the main body is provided with a through movable cavity along the axis direction of the tubular test piece; the movable block is in threaded connection with one end of the movable cavity, which is away from the tubular test piece; the two thread blocks are symmetrically and rotatably connected with the movable cavity along the axis of the tubular test piece, the two thread blocks are positioned at one end, close to the tubular test piece, of the movable cavity, and external threads used for being in threaded fit with the tubular test piece are formed in the peripheral surfaces of the two thread blocks; the movable shaft extends along the axial direction of the tubular test piece, and one end of the movable shaft, which is close to the movable block, is rotatably connected with the movable block around the axial line of the movable shaft; one ends of the two connecting pieces are rotatably connected with one end of the movable shaft close to the tubular test piece, and the other ends of the two connecting pieces are respectively rotatably connected with the inner peripheral surfaces of the two thread blocks; the movable block is used for rotating relative to the main body under the action of external force so as to drive the movable shaft to move along the axis of the tubular test piece, and further drive the two connecting pieces to expand outwards or contract inwards, so that the two thread blocks are driven to move to a first position or a second position;
when the two thread blocks move to the first position, the two thread blocks stretch outwards and are both used for being in threaded fit with the tubular test piece; when the two thread blocks move to the second position, the two thread blocks are retracted and are disengaged from the thread fit with the tubular test piece;
the first plug and the second plug respectively comprise a guide piece arranged in the movable cavity and a sealing piece positioned at one end of the main body close to the tubular test piece; the guide piece is used for guiding the movable shaft to move along the axial direction of the tubular test piece, and the sealing piece is used for plugging the end part of the tubular test piece.
6. The pipeline magnetization simulation detection system under the action of the composite load according to claim 4, characterized in that:
the torque loading unit comprises a first motor, a worm wheel and two limit pins;
the first motor is connected with the fixing plate, the worm is in transmission connection with the output end of the first motor, and the worm is meshed with the turbine; the first plug is a square body; the turbine is connected with the first plug, and a square hole matched with the first plug is formed in the turbine; the two limiting pins are connected with the first plug, and the two limiting pins are located on two sides of the turbine along the axis of the tubular test piece so as to limit the sliding of the turbine relative to the first plug;
the first motor is used for driving the worm to rotate so as to drive the turbine to rotate, and further the tubular test piece is driven to twist around the axis of the tubular test piece.
7. The pipeline magnetization simulation detection system under the action of the composite load according to claim 4, characterized in that:
the tension and compression loading unit comprises a hydraulic cylinder, a sliding block and a guide table;
the hydraulic cylinder is connected with the fixed table; the guide table is connected with the fixing table or the bottom plate, a guide groove is formed in the guide table along the axial direction of the tubular test piece, and the sliding block is matched with the guide groove in a sliding mode; along the axial direction of the tubular test piece, two ends of the sliding block are respectively connected with the movable end of the hydraulic cylinder and the second plug;
the hydraulic cylinder is used for driving the sliding block to move along the axis direction of the tubular test piece so as to drive the second plug to move and further pull and press the tubular test piece.
8. The pipeline magnetization simulation detection system under the action of the composite load according to claim 4, wherein:
the internal pressure loading unit comprises a high-pressure air compression pump and an air guide pipe, the high-pressure air compression pump is connected with the fixed platform or the bottom plate, and two ends of the air guide pipe are respectively communicated with an air outlet end of the high-pressure air compression pump and the tubular test piece;
the high-pressure air compression pump is used for injecting high-pressure air into the tubular test piece through the air guide pipe.
9. The pipeline magnetization simulation detection system under the action of the composite load according to claim 1, characterized in that:
the first movable unit comprises a second motor, an installation platform, a driving gear, a rotating ring and a first connecting frame; the mounting table is connected with the fixed plate or the bottom plate, the rotating ring is rotatably connected with the mounting table around the axis of the tubular test piece, and inner teeth are arranged on the inner circumferential surface of the rotating ring; the driving gear is in transmission connection with the output end of the second motor and is internally meshed with the rotating ring; the detection ring is movably connected with the rotating ring along the axis of the tubular test piece through the first connecting frame;
the second movable unit comprises a mounting seat, a sliding table module and a guide piece; the mounting seat is connected with the bottom plate or the mounting seat, the sliding table module is connected with the mounting seat in a sliding mode along the axial direction of the tubular test piece, and the guide piece is connected with the sliding table module; the guide member abuts at least one side of the detection ring in the axial direction of the tubular specimen.
CN202210425492.3A 2022-04-22 2022-04-22 Pipeline magnetization simulation detection system under action of composite load Active CN114526995B (en)

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