CN105547859A - Experiment device and method for simulating situation that natural gas pipeline bears vibration and bending moment load - Google Patents
Experiment device and method for simulating situation that natural gas pipeline bears vibration and bending moment load Download PDFInfo
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- CN105547859A CN105547859A CN201610039917.1A CN201610039917A CN105547859A CN 105547859 A CN105547859 A CN 105547859A CN 201610039917 A CN201610039917 A CN 201610039917A CN 105547859 A CN105547859 A CN 105547859A
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- 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
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- 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
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
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Abstract
The invention discloses an experiment device and method for simulating a situation that a natural gas pipeline bears vibration and bending moment load. The experiment device comprises a base, external pressure rod assemblies, and two sets of hydraulic mechanisms, wherein the external pressure rod assemblies are respectively arranged at two ends of the base and are used for providing pressure moment for two ends of an experiment pipeline; the hydraulic mechanisms are arranged in the middle of the base; the external pressure rod assemblies are used for simulating the situation that the experiment pipeline bears load when bearing bending moment; the two sets of the hydraulic mechanisms are used for simulating the state that the experiment pipeline bears vibration; one end of the experiment pipeline is sealed, and the other end of the experiment pipeline is connected with a compression system which provides air pressure or hydraulic pressure for the experiment pipeline for simulating gas or liquid conveyed in the natural gas pipeline; the two sets of the hydraulic mechanisms and the compression system are in signal connection with an industrial computer. The experiment device meets requirements for property and life tests of the gas pipeline, and provides an experiment platform for simulating the situation that the gas pipeline bears vertical vibration load and bending moment load for the property and life test project of the gas pipeline.
Description
Technical field
The present invention relates to the test unit of tube performance and life test, particularly relate to a kind of test unit and the method for simulating the vibrated and moment load of natural gas line.
Background technology
Along with the degree of modernization construction is more and more higher, life line system also becomes day by day complicated, and natural gas Gas pipeline system one of important system wherein especially.Because of pipeline environment for use complicacy, in process of deployment, likely can produce certain bending, also have the factors such as pipeline use procedure mesorelief variation that pipeline also can be caused to produce excessive flexural deformation and cause certain damage.In addition, pipeline bears the oscillatory load caused from factors such as the up and-down vehicles in road surface and underground or engineering constructions for a long time, also has the External Force Actings such as earthquake also can cause the vibration of pipeline, all can have a significant impact the fatigue lifetime of pipeline.During pipeline work, the fluctuation of the factor such as pressure, flow velocity of the medium of Bottomhole pressure, can cause the vibration of pipeline too.So at the flexural deformation of pipeline, oscillatory load and pipe under the interaction of the factors such as pressure, the performance of pipeline and life-span will inevitably be subject to certain impact.In order to continue to provide safe and reliable Gas Energy Source to user, ensure the normal operation of life line system, under simulation gas pipeline is subject to oscillatory load, moment load situation, the performance depressed in different defect level and difference and testing fatigue are carried out to gas pipeline, study these factors on pipeline performance and the impact in life-span significant.
Electrohydraulic servo-controlling system has good control performance and robustness, is often used to the control realizing electro-hydraulic position, speed, acceleration and power; Can remote input electrical signal, realize continuous, proportional control, the hydraulic power of output is large, inertia is little, precision is high, fast response time; Be widely used in engineering.Therefore, vertical motion load can be simulated with electrohydraulic servo system.On this basis, a kind of applying vibration of natural gas line and the test unit of moment load is developed.
Summary of the invention
The object of the invention is to the shortcoming and defect overcoming above-mentioned prior art, the test unit of the vibrated and moment load of the simulation natural gas line providing a kind of structure simple, easy to operate, stable and method.And then to natural gas tube performance under external force with test fatigue lifetime.
The present invention is achieved through the following technical solutions:
Simulate a test unit for the vibrated and moment load of natural gas line, comprise base 2; Be separately positioned on base 2 two ends for providing the external compression bar assembly 3 pressing down moment to the two ends of test pipe 1, flexural deformation when being subject to moment load with simulation test pipeline 1;
Be arranged in the middle part of base 2 and be provided with two groups of hydraulic mechanisms 4, test pipe 1 to be carried on two groups of hydraulic mechanisms 4 and to be fixedly connected with it by securing member; The state that described two groups of hydraulic mechanisms 4 are being vibrated for simulation test pipeline 1;
One end sealing of test pipe 1, the other end connects compression system, and compression system provides air pressure or hydraulic pressure in test pipe 1, for simulating the gas or liquid carried in natural gas line;
Two groups of hydraulic mechanisms 4 divide level signal to be connected industrial computer 9 with compression system.
Described hydraulic mechanism 4 comprises, hydraulic cylinder 4.1, displacement transducer 8, electrohydraulic servo valve 6, hydraulic oil source control system 5 and vibrating controller 7;
The upper oil cavitie of described hydraulic cylinder 4.1 is connected electrohydraulic servo valve 6 with lower oil cavitie respectively by pipeline, and described electrohydraulic servo valve 6 is by pipeline connecting fluid force feed source control system 5;
Institute's displacement sensors 8, electrohydraulic servo valve 6 and hydraulic oil source control system 5 are connected with vibrating controller 7 signal respectively; Described vibrating controller 7 signal connects industrial computer 9; Described industrial computer 9, by the control to vibrating controller 7, makes the piston rod of hydraulic cylinder 4.1 complete required flexible stroke, stretching speed and stretching frequency, with simulation test pipeline 1 being subject to state when vibrating.
Described compression system comprises compressor 10, supercharge pump 11, pressure controller 12, first pressure transducer 13, second pressure transducer 14;
Described compressor 10 is by the unsealing end of working medium delivery pipe joint test pipeline 1, described supercharge pump 11 is arranged on the pipeline of working medium delivery pipe, the working medium delivery pipe pipeline of compressor 10 to supercharge pump 11 is provided with the first pressure transducer 13, the working medium delivery pipe pipeline of supercharge pump 11 to joint test pipeline 1 is provided with the second pressure transducer 14;
Described first pressure transducer 13 is connected with pressure controller 12 signal respectively with the second pressure transducer 14; Described pressure controller 12 signal connects industrial computer 9;
Described external compression bar assembly 3 comprises external compression bar 3.1, outer plate 3.2, leading screw 3.3, leading screw web joint 3.4;
The lower end of described external compression bar 3.1 connects the end of base 2, and the upper end of external compression bar 3.1 is successively through outer plate 3.2 and leading screw web joint 3.4; Described outer plate 3.2 is placed in the top of test pipe 1; Described leading screw 3.3 is arranged on the middle part of leading screw web joint 3.4, adopts threaded engagement between leading screw 3.3 and leading screw web joint 3.4; When rotational lead screw 3.3 makes it move downward, the two ends of test pipe 1 are moved downward and occurs bending and deformation, with the flexural deformation test of simulation test pipeline 1 when being subject to moment load.
Described test pipe 1 to be carried on two groups of hydraulic mechanisms 4 and to be fixedly connected with it by securing member, wherein, this securing member comprises the curved mould 4.3 of support and the buckle 4.4 of the piston rod end being fixed on hydraulic cylinder 4.1, and described test pipe 1 is limited in supporting curved mould 4.3 between buckle 4.4.
The curved mould 4.3 of described support is that face contacts with buckle 4.4 and the surface of contact of test pipe 1.
Simulate a method for the vibrated and moment load of natural gas line, specifically comprise the steps.
Simulation test pipeline 1 is subject to flexural deformation step during moment load:
Its flexural deformation is made by the external compression bar assembly 3 pairs of test pipe 1 two ends imposed loads being positioned at base 2 two ends, namely outer plate 3.2 is pressed in the upper surface of test pipe 1, offseted by the end of rotating threaded shaft 3.3 and outer plate 3.2, and make it promote test pipe 1 to move downward, thus the two ends of test pipe 1 are moved downward occur bending and deformation; Complete flexural deformation test when simulation test pipeline 1 is subject to moment load;
Pressure testing procedure in simulation test pipeline 1:
According to testing requirements, input corresponding instruction at industrial computer 9, control to pressurize in compressor 10 and supercharge pump 11 pairs of test pipes 1, pressurization refers to air pressure or hydraulic pressure; Monitored and feedback pressure information by the first pressure transducer 13 and the second pressure transducer 14, pressure controller 12 is according to the pressure information of monitoring and feed back to, compression system is regulated, makes the liquid in test pipe 1 or gaseous tension reach testing requirements and keep stable; Complete pressure test in simulation test pipeline 1;
Simulation test pipeline 1 is being subject to step when vibrating:
The control signal of the vibrational waveform that will simulate is tested industrial computer 9 input, industrial computer 9 sends control signal to electrohydraulic servo valve 6, control the action of two groups of hydraulic cylinders 4.1, namely the piston rod of hydraulic control cylinder 4.1 completes required stretching speed and stretching frequency action, drives test pipe 1 to vibrate; Simultaneously, the flexible stroke of displacement transducer 8 pairs of hydraulic cylinder 4.1 piston rods is utilized to monitor and feed back, industrial computer 9 carries out the position servo control of piston rod according to feedback signal, makes hydraulic cylinder 4.1 have stable output, and obtains the oscillogram required for experiment; Complete simulation test pipeline 1 being subject to test when vibrating.
The present invention, relative to prior art, has following advantage and effect:
The present invention by external compression bar assembly 3, flexural deformation when being subject to curved load square with simulation test pipeline 1;
By two groups of hydraulic mechanisms 4, the state vibrated with simulation test pipeline 1; By compression system, to simulate the gas or liquid carried in natural gas line;
The present invention can according to testing requirements make test pipe 1 produce in various degree bending, realize the vibration wave simulation of different wave, and different pressure can be applied according to testing requirements to test pipe 1 inside, and to the Real-time Collection of test figure and process, simultaneously by the control to hydraulic cylinder 4.1, displacement transducer 8, electrohydraulic servo valve 6, hydraulic oil source control system 5 and vibrating controller 7 etc., carry out waveform adjustment and pressure adjustment; Adopt electrohydraulic servo-controlling system analog vibration load, there is good control performance and robustness, can remote input electrical signal, realize continuous, proportional control, the hydraulic power of output is large, inertia is little, precision is high, fast response time.
The present invention meets the performance of gas pipeline and the requirement of life test by test pipe 1, is gas pipeline performance and life test project, provides the platform of the test that simulation gas pipeline loads by vertical motion load and moment of flexure.Thus to the performance of natural gas line with test fatigue lifetime and assess, when guaranteeing construction, the natural gas line that availability can be reliable, safe.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
Fig. 2 is sectional perspective structural representation of the present invention.
Fig. 3 is hydraulic oil source system architecture schematic diagram of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is more specifically described in detail.
Embodiment
As shown in Figures 1 to 3.The invention discloses a kind of test unit of simulating the vibrated and moment load of natural gas line, comprise base 2; Be separately positioned on base 2 two ends for providing the external compression bar assembly 3 pressing down moment to the two ends of test pipe 1, flexural deformation when being subject to moment load with simulation test pipeline 1;
Be arranged in the middle part of base 2 and be provided with two groups of hydraulic mechanisms 4, test pipe 1 to be carried on two groups of hydraulic mechanisms 4 and to be fixedly connected with it by securing member; The state that described two groups of hydraulic mechanisms 4 are being vibrated for simulation test pipeline 1;
One end sealing of test pipe 1, the other end connects compression system, and compression system provides air pressure or hydraulic pressure in test pipe 1, for simulating the gas or liquid carried in natural gas line;
Two groups of hydraulic mechanisms 4 divide level signal to be connected industrial computer 9 with compression system.
Described hydraulic mechanism 4 comprises, hydraulic cylinder 4.1, displacement transducer 8, electrohydraulic servo valve 6, hydraulic oil source control system 5 and vibrating controller 7.The upper oil cavitie of described hydraulic cylinder 4.1 is connected electrohydraulic servo valve 6 with lower oil cavitie respectively by pipeline, and described electrohydraulic servo valve 6 is by pipeline connecting fluid force feed source control system 5.Institute's displacement sensors 8, electrohydraulic servo valve 6 and hydraulic oil source control system 5 are connected with vibrating controller 7 signal respectively; Described vibrating controller 7 signal connects industrial computer 9; Described industrial computer 9, by the control to vibrating controller 7, makes the piston rod of hydraulic cylinder 4.1 complete required flexible stroke, stretching speed and stretching frequency, with simulation test pipeline 1 being subject to state when vibrating.
Described compression system comprises compressor 10, supercharge pump 11, pressure controller 12, first pressure transducer 13, second pressure transducer 14;
Described compressor 10 is by the unsealing end of working medium delivery pipe joint test pipeline 1, described supercharge pump 11 is arranged on the pipeline of working medium delivery pipe, the working medium delivery pipe pipeline of compressor 10 to supercharge pump 11 is provided with the first pressure transducer 13, the working medium delivery pipe pipeline of supercharge pump 11 to joint test pipeline 1 is provided with the second pressure transducer 14;
Described first pressure transducer 13 is connected with pressure controller 12 signal respectively with the second pressure transducer 14; Described pressure controller 12 signal connects industrial computer 9;
Described external compression bar assembly 3 comprises external compression bar 3.1, outer plate 3.2, leading screw 3.3, leading screw web joint 3.4;
The lower end of described external compression bar 3.1 connects the end of base 2, and the upper end of external compression bar 3.1 is successively through outer plate 3.2 and leading screw web joint 3.4; Described outer plate 3.2 is placed in the top of test pipe 1; Described leading screw 3.3 is arranged on the middle part of leading screw web joint 3.4, adopts threaded engagement between leading screw 3.3 and leading screw web joint 3.4; When rotational lead screw 3.3 makes it move downward, the two ends of test pipe 1 are moved downward and occurs bending and deformation, with the flexural deformation test of simulation test pipeline 1 when being subject to moment load.
Described test pipe 1 to be carried on two groups of hydraulic mechanisms 4 and to be fixedly connected with it by securing member, wherein, this securing member comprises the curved mould 4.3 of support and the buckle 4.4 of the piston rod end being fixed on hydraulic cylinder 4.1, and described test pipe 1 is limited in supporting curved mould 4.3 between buckle 4.4.
The curved mould 4.3 of described support is that face contacts with buckle 4.4 and the surface of contact of test pipe 1.
The hydraulic principle of hydraulic oil source control system 5 of the present invention as shown in Figure 3.In figure: fuel tank 5.1, hydraulic pump 5.3, safety valve 5.9, unloader 5.10, pressure regulator valve 5.11, electrohydraulic servo valve 6 and hydraulic cylinder 4.1, form servo control loop.
Electrohydraulic servo valve 6 is 3-position 4-way servo-valve, its four interfaces respectively with epicoele and the cavity of resorption of fuel tank 5.1, hydraulic pump 5.3, hydraulic cylinder 4.1, namely upper oil cavitie is connected with lower oil cavitie, and wherein oil-in is connected by retaining valve 5.5 with hydraulic pump 5.3.Electrohydraulic servo valve 6 open condition controlled by industrial computer 9, by controlling the open condition of electrohydraulic servo valve 6, can stepless time adjustment be carried out to the piston rod movement of hydraulic cylinder 4.1 and change direction of motion;
In the present embodiment, adopt electricity liquid ratio relief valve as safety valve 5.9, its safe pressure value is determined by the electric signal that industrial computer 9 is given.The oil-in of safety valve 5.9 is connected with hydraulic pump 5.3, and oil-out is connected with fuel tank 5.1.Adopt 2/2-way solenoid valve as unloader 5.10, its off-load signal is determined by the electric signal that industrial computer 9 is given.The oil-in of unloader 5.10 is connected with the control port of safety valve 5.9, and oil-out is connected with fuel tank 5.1, and when it receives off-load signal, unloader 5.10 is connected, thus control safety valve 5.9 oil circuit connects direct off-load.
In the present embodiment, adopt electricity liquid ratio relief valve as pressure regulator valve 5.11, its pressure signal value is determined by the electric signal that industrial computer 9 is given; The oil-in of pressure regulator valve 5.11 is connected by retaining valve 5.5 with hydraulic pump 5.3, and oil-out is connected with fuel tank 5.1.
In order to the position of hydraulic cylinder 4.1 piston rod action can be monitored so that industrial computer 9 sends corresponding control signal, also displacement transducer 8 is installed simultaneously at hydraulic cylinder top;
Because servo control loop has higher requirement to the clean-up performance of oil sources and temperature, at pressure oil circuit and oil return line, filtrator 5.2,5.4,5.7 is installed, oil return line has been installed refrigeratory 5.6 and fuel tank and has been provided with thermometer 5.8 and monitors oil sources temperature.
During work, compression system inputs pressurization signal according to testing requirements, by 11 actings in conjunction of compressor 10 and supercharge pump, makes the pipe pressure of test pipe 1 reach the requirement of test; Meanwhile, also utilize the first pressure transducer 13 and the second pressure transducer 14 to monitor and feed back the pressure that compressor outlet and supercharge pump 11 export, pressure controller 12 regulates compression system according to monitor signal, the pressure stability in warranty test pipeline 1.
In addition, electrohydraulic servo valve 6 is according to the vibration waveform signal inputted at industrial computer 9 and other control signal, make the piston rod of two groups of hydraulic cylinders carry out action according to instruction, drive test pipe 1 to vibrate, thus simulation test pipeline is subject to the effect of oscillatory load; Simultaneously, the position of displacement transducer 8 pairs of hydraulic cylinders is also utilized to monitor and feed back, industrial computer 9 carries out position servo control according to feedback signal, electrohydraulic servo valve 6 plays the effect of reversal valve and flowrate control valve, thus realizes the control to the physical quantity such as piston rod extended position, speed, acceleration of two groups of hydraulic cylinders; Under the acting in conjunction of electrohydraulic servo valve 6 and displacement transducer 8, ensure that hydraulic cylinder has stable output, thus obtain stable oscillogram.
The present invention simulates the method for the vibrated and moment load of natural gas line, realizes by following steps.
Simulation test pipeline 1 is subject to flexural deformation step during moment load:
Its flexural deformation is made by the external compression bar assembly 3 pairs of test pipe 1 two ends imposed loads being positioned at base 2 two ends, namely outer plate 3.2 is pressed in the upper surface of test pipe 1, offseted by the end of rotating threaded shaft 3.3 and outer plate 3.2, and make it promote test pipe 1 to move downward, thus the two ends of test pipe 1 are moved downward occur bending and deformation; Complete flexural deformation test when simulation test pipeline 1 is subject to moment load;
Pressure testing procedure in simulation test pipeline 1:
According to testing requirements, input corresponding instruction at industrial computer 9, control to pressurize in compressor 10 and supercharge pump 11 pairs of test pipes 1, pressurization refers to air pressure or hydraulic pressure; Monitored and feedback pressure information by the first pressure transducer 13 and the second pressure transducer 14, pressure controller 12 is according to the pressure information of monitoring and feed back to, compression system is regulated, makes the liquid in test pipe 1 or gaseous tension reach testing requirements and keep stable; Complete pressure test in simulation test pipeline 1;
Simulation test pipeline 1 is being subject to step when vibrating:
The control signal of the vibrational waveform that will simulate is tested industrial computer 9 input, industrial computer 9 sends control signal to electrohydraulic servo valve 6, control the action of two groups of hydraulic cylinders 4.1, namely the piston rod of hydraulic control cylinder 4.1 completes required stretching speed and stretching frequency action, drives test pipe 1 to vibrate; Simultaneously, the flexible stroke of displacement transducer 8 pairs of hydraulic cylinder 4.1 piston rods is utilized to monitor and feed back, industrial computer 9 carries out the position servo control of piston rod according to feedback signal, makes hydraulic cylinder 4.1 have stable output, and obtains the oscillogram required for experiment; Complete simulation test pipeline 1 being subject to test when vibrating.
When practical application, above-mentioned three steps can be tested separately respectively, and also may be combined with and test simultaneously, order also can be in no particular order.The vibrational waveform of two groups of hydraulic cylinders can be different, also can be identical, and the two acting in conjunction drives test pipe vibration.
As mentioned above, just the present invention can be realized preferably.
Embodiments of the present invention are not restricted to the described embodiments; other are any do not deviate from Spirit Essence of the present invention and principle under do change, modification, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (7)
1. simulate a test unit for the vibrated and moment load of natural gas line, it is characterized in that comprising
Base (2);
Be separately positioned on base (2) two ends for providing the external compression bar assembly (3) pressing down moment to the two ends of test pipe (1), flexural deformation when being subject to moment load with simulation test pipeline (1);
Be arranged on base (2) middle part and be provided with two groups of hydraulic mechanisms (4), test pipe (1) is carried on two groups of hydraulic mechanisms (4) and goes up and be fixedly connected with it by securing member; The state that described two groups of hydraulic mechanisms (4) are being vibrated for simulation test pipeline (1);
One end sealing of test pipe (1), the other end connects compression system, and compression system provides air pressure or hydraulic pressure in test pipe (1), for simulating the gas or liquid carried in natural gas line;
Two groups of hydraulic mechanisms (4) divide level signal to be connected industrial computer (9) with compression system.
2. simulate the test unit of the vibrated and moment load of natural gas line according to claim 1, it is characterized in that, described hydraulic mechanism (4) comprises, hydraulic cylinder (4.1), displacement transducer (8), electrohydraulic servo valve (6), hydraulic oil source control system (5) and vibrating controller (7);
The upper oil cavitie of described hydraulic cylinder (4.1) is connected electrohydraulic servo valve (6) with lower oil cavitie respectively by pipeline, and described electrohydraulic servo valve (6) is by pipeline connecting fluid force feed source control system (5);
Institute's displacement sensors (8), electrohydraulic servo valve (6) are connected with vibrating controller (7) signal respectively with hydraulic oil source control system (5); Described vibrating controller (7) signal connects industrial computer (9); Described industrial computer (9) is by the control to vibrating controller (7), the piston rod of hydraulic cylinder (4.1) is made to complete required flexible stroke, stretching speed and stretching frequency, with simulation test pipeline (1) being subject to state when vibrating.
3. simulate the test unit of the vibrated and moment load of natural gas line according to claim 1, it is characterized in that, described compression system comprises compressor (10), supercharge pump (11), pressure controller (12), the first pressure transducer (13), the second pressure transducer (14);
Described compressor (10) is by the unsealing end of working medium delivery pipe joint test pipeline (1), described supercharge pump (11) is arranged on the pipeline of working medium delivery pipe, the working medium delivery pipe pipeline of compressor (10) to supercharge pump (11) is provided with the first pressure transducer (13), the working medium delivery pipe pipeline of supercharge pump (11) to joint test pipeline (1) is provided with the second pressure transducer (14);
Described first pressure transducer (13) is connected with pressure controller (12) signal respectively with the second pressure transducer (14); Described pressure controller (12) signal connects industrial computer (9).
4. according to any one of claims 1 to 3, simulate the test unit of the vibrated and moment load of natural gas line, it is characterized in that, described external compression bar assembly (3) comprises external compression bar (3.1), outer plate (3.2), leading screw (3.3), leading screw web joint (3.4);
The lower end of described external compression bar (3.1) connects the end of base (2), and the upper end of external compression bar (3.1) is successively through outer plate (3.2) and leading screw web joint (3.4); Described outer plate (3.2) is placed in the top of test pipe (1); Described leading screw (3.3) is arranged on the middle part of leading screw web joint (3.4), adopts threaded engagement between leading screw (3.3) and leading screw web joint (3.4); When rotational lead screw (3.3) makes it move downward, the two ends of test pipe (1) are moved downward and occurs bending and deformation, flexural deformation test when being subject to moment load with simulation test pipeline (1).
5. simulate the test unit of the vibrated and moment load of natural gas line according to claim 4, it is characterized in that, described test pipe (1) is carried on two groups of hydraulic mechanisms (4) and goes up and be fixedly connected with it by securing member, wherein, this securing member comprises the curved mould of support (4.3) and the buckle (4.4) of the piston rod end being fixed on hydraulic cylinder (4.1), and described test pipe (1) is limited in supporting curved mould (4.3) between buckle (4.4).
6. simulate the test unit of the vibrated and moment load of natural gas line according to claim 5, it is characterized in that, the curved mould of described support (4.3) is that face contacts with buckle (4.4) and the surface of contact of test pipe (1).
7. simulate a method for the vibrated and moment load of natural gas line, it is characterized in that, adopt and according to any one of claim 1 to 6, to simulate that natural gas line is vibrated to be realized with the test unit of moment load, specifically comprise the steps:
Simulation test pipeline (1) is subject to flexural deformation testing procedure during moment load
By the external compression bar assembly (3) being positioned at base (2) two ends, its flexural deformation is made to test pipe (1) two ends imposed load, namely outer plate (3.2) is pressed in the upper surface of test pipe (1), offseted by the end of rotating threaded shaft (3.3) and outer plate (3.2), and make it promote test pipe (1) to move downward, thus the two ends of test pipe (1) are moved downward occur bending and deformation; Complete flexural deformation test when simulation test pipeline (1) is subject to moment load;
Pressure testing procedure in simulation test pipeline (1)
According to testing requirements, input corresponding instruction at industrial computer (9), control compressor (10) and supercharge pump (11) pressurize in test pipe (1), and pressurization refers to air pressure or hydraulic pressure; Monitored and feedback pressure information by the first pressure transducer (13) and the second pressure transducer (14), pressure controller (12) is according to the pressure information of monitoring and feed back to, compression system is regulated, makes the liquid in test pipe (1) or gaseous tension reach testing requirements and keep stable; Complete pressure test in simulation test pipeline (1);
Simulation test pipeline (1) step when being subject to oscillatory load
The control signal of the vibrational waveform that will simulate is tested in industrial computer (9) input, industrial computer (9) sends control signal to electrohydraulic servo valve (6), control the action of two groups of hydraulic cylinders (4.1), namely the piston rod of hydraulic control cylinder (4.1) completes required stretching speed and stretching frequency action, drives test pipe (1) to vibrate; Simultaneously, the flexible stroke of displacement transducer (8) to hydraulic cylinder (4.1) piston rod is utilized to monitor and feed back, industrial computer (9) carries out the position servo control of piston rod according to feedback signal, make hydraulic cylinder (4.1) have stable output, and obtain the oscillogram required for experiment; Complete simulation test pipeline (1) being subject to test when vibrating.
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| CN109323940A (en) * | 2018-08-02 | 2019-02-12 | 天津航天瑞莱科技有限公司 | Bus fatigue experimental device and test method based on hydraulic vibration gen |
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| CN109374428A (en) * | 2018-08-27 | 2019-02-22 | 南方科技大学 | Flexible pipe cable bending tester |
| CN112284924A (en) * | 2019-07-25 | 2021-01-29 | 中国石油天然气集团有限公司 | Bending resistance testing device for large-scale oil and gas pipeline equipment |
| CN111504825A (en) * | 2020-05-26 | 2020-08-07 | 宁波江丰复合材料科技有限公司 | Strength durability detection method for carbon fiber tube |
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| CN112683686A (en) * | 2021-01-18 | 2021-04-20 | 北京科力华安地质灾害监测技术有限公司 | Pipeline stress deformation test experimental device and method |
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| CN113216937A (en) * | 2021-06-23 | 2021-08-06 | 中煤科工集团重庆研究院有限公司 | Dynamic comprehensive performance test method and device for coal mine drill rod |
| CN113216938B (en) * | 2021-06-23 | 2022-05-13 | 中煤科工集团重庆研究院有限公司 | Dynamic comprehensive performance testing device for coal mine drill rod |
| CN113216938A (en) * | 2021-06-23 | 2021-08-06 | 中煤科工集团重庆研究院有限公司 | Dynamic comprehensive performance testing device for coal mine drill rod |
| CN113686692A (en) * | 2021-08-30 | 2021-11-23 | 安徽豪洋管业科技有限公司 | HDPE bellows mechanical strength test frock |
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