CN111948073B - Buried pipeline external explosion coupling interface parameter experiment testing device - Google Patents
Buried pipeline external explosion coupling interface parameter experiment testing device Download PDFInfo
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- CN111948073B CN111948073B CN201910405252.5A CN201910405252A CN111948073B CN 111948073 B CN111948073 B CN 111948073B CN 201910405252 A CN201910405252 A CN 201910405252A CN 111948073 B CN111948073 B CN 111948073B
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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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/313—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by explosives
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention provides a buried pipeline external explosion coupling interface parameter experiment testing device, which comprises: the liquid storage tank, the check valve, the metal liquid inlet pipe, the centrifugal pump, the flowmeter, the fiber hose, the pipeline reducer union, the experimental pipeline and the pressure gauge are connected in sequence; the JM5930 dynamic signal testing system is connected with a dynamic displacement sensor, a dynamic strain sensor, a dynamic pressure sensor and a dynamic acceleration sensor, and the sensors are arranged on an experiment pipeline; the pipeline protection device comprises a pipeline combined bracket and a protection cover which are arranged on a fixed support, wherein the protection cover protects the pipeline combined bracket; an experimental pipeline is rigidly fixed on the pipeline combined bracket; the TNT detonation device comprises a TNT detonation device connected with an experimental pipeline. The scheme takes TNT as an explosion source, and completely simulates the real explosion effect; the transmission of the properties and the flowing state of the fluid in the pipe, the pressure and the displacement, the stress and the acceleration of the coupling interface of the pipeline structure and the soil body are fully considered.
Description
Technical Field
The invention relates to the technical field of buried pipeline safety testing, in particular to a buried pipeline external explosion coupling interface parameter experimental testing device.
Background
With the rapid development of the petroleum and petrochemical industry, the advantages of pipeline transportation are gradually revealed in various oil and gas transportation modes. The pipeline transportation has obvious economy, and the oil gas flows around the clock by being directly pushed by the oil transfer pump and the compressor, so that the automatic operation is easy to realize, and the number of operators is small. And the occupied area is small, and the construction is quick. In recent decades, global oil and gas pipeline construction has entered peak periods, and under such circumstances, the safety production of long-distance buried oil and gas pipelines is increasingly emphasized. Due to the fact that accidental external explosion loads such as leakage explosion, engineering blasting construction and terrorist attack close to the oil and gas pipeline are caused to damage the oil and gas pipeline under the action of transient impact loads, casualties and major property loss are caused. Along with the development of long oil and gas pipelines, the improvement of pipeline conveying flow and conveying pressure become the main targets of the development of the current oil and gas pipelines. The pressure of the crude oil conveying pipeline reaches above 5MPa when the gas conveying pipeline reaches above 12MPa, so that the response of the pipeline under the impact of the explosion is more complicated. The response characteristics and the law of the buried oil and gas pipeline under the impact action of the explosion ground are researched, the severity of the accident is reasonably judged so as to take necessary preventive measures, and the method is a correct idea for ensuring the safety of the pipeline.
The buried pipeline is influenced by the impact action of an explosion ground and mainly comprises two aspects: on one hand, the pipeline coupling interface is subjected to explosion impact stress waves and extrusion forces of seismic waves and elastic-plastic deformation of soil bodies, and on the other hand, the pipeline is also subjected to deformation and vibration caused by the internal pressure and the flowing state of an internal fluid medium, so that the load on the coupling interface of the buried oil and gas pipeline and the soil bodies and the internal fluid is very complex, and a current student mainly studies the stress of the coupling interface of the pipeline on the basis of whether the problem of the fluid medium in the pipeline is considered. In the existing research, a spring unit or a contact unit is respectively adopted to describe a coupling interface between a pipeline and a soil body, and fluid-solid coupling interface is described by considering fluid pressure in the pipeline. However, because the vibration frequency of the pipeline changes due to the flowing state of the medium in the pipe, if the natural frequency of the buried gas transmission pipeline is close to the major frequency of the blasting earthquake, the pipeline is more likely to be damaged by the blasting earthquake, and therefore, the influence of the flowing state of the medium in the pipe on the vibration condition of the coupling interface needs to be considered. Meanwhile, due to the high conveying pressure of gas in the pipe and the incompressibility of fluid, the problem of structural domain large deformation nonlinearity caused by fluid domain dynamic grid mutation under explosive impact load can affect the dynamic response and failure mode of the pipeline. The above-mentioned is the key technical problem that needs to be solved urgently in the load transfer problem of the coupling interface of the fluid, the pipeline and the soil body.
In the research, the method can be divided into static experiments, dynamic experiments and blasting experiments according to different seismic sources generated by simulated explosion. A scholars thinks that the buried pipeline is mainly subjected to axial force under the action of seismic waves, and the damage type is tensile damage. On the basis, the cast iron pipeline and the PE pipeline are subjected to drawing tests to obtain the damage characteristics and the maximum resistance of the cast iron pipeline and the PE pipeline under the static force action, and because the static force test is only used for simply obtaining the tensile property of the buried pipeline, the stress and the strain of the pipeline in a soil body cannot be simulated, and the research method needs to be improved. In order to better simulate the real stress and strain of the buried pipeline under the action of seismic waves, researchers begin to perform seismic simulation shaking table tests. The earthquake simulation shaking table test is an earthquake simulation test in the true sense, can truly realize earthquake waves in various forms on the shaking table, can more intuitively show the failure mechanism of the structure under the action of an earthquake, and is the most direct and more accurate test method for researching the earthquake resistance of the structure at present. The earthquake simulation shaking table has limitations, is not real explosive earthquake waves, has strict requirements on dynamic similar conditions of a test object, and has large investment, complex design and construction process and great difficulty. In order to obtain a test result which is more in line with the actual test result, domestic and foreign scholars develop a series of explosion ground impact tests. For example, 1) the magnitude of the impact pressure generated by explosion under the blasting vibration is obtained by using an acquisition and analysis system, the condition that the back surface of the buried pipe section is easily damaged by axial tensile stress under the action of stress waves is analyzed, and the stress process is a transient stress process. 2) The ground mark vibration speed under the influence of the explosion seismic waves is detected on site, and the dynamic response influence rule of the pipeline is researched by taking the collected seismic signals as load conditions. 3) Through the field test of the full-size pipeline blasting construction, the acceleration and the pressure of the blast shock wave generated in the soil body are respectively measured.
To sum up, to burying the outer explosive response problem of oil gas pipeline: the existing experimental design concept does not comprehensively consider the flowing state of the medium in the pipe and the influence of the flowing state of the medium on the vibration condition of the coupling interface under the explosive impact load. The existing static force experiment only simply obtains the tensile property of the buried pipeline and cannot simulate the stress and strain of the pipeline in the soil body; the existing dynamic experiment has great limitation and cannot simulate real explosion seismic waves; although the actual explosion effect is simulated in the existing explosion experiment, the load analysis on the existing internal fluid coupling interface is only limited to the axial tensile stress, the acceleration and the pressure in the load analysis. However, the coupling transmission of the displacement and the acceleration of the coupling interface is not considered, and the vibration of the pipeline and the change of the contact state of the pipeline and the soil body caused by the flowing state of the fluid are not considered; the accurate calculation of the load of the coupling interface of the fluid, the pipeline and the soil body cannot be realized.
Disclosure of Invention
The embodiment of the invention provides a buried pipeline external explosion coupling interface parameter experimental testing device, which solves the technical problems that real explosion seismic waves cannot be simulated, coupling transmission of coupling interface displacement and acceleration is not considered, and pipeline vibration and change conditions of a pipeline and a soil body contact state caused by a fluid flow state are not considered in the prior art.
This buried pipeline external explosion coupling interface parameter experiment testing arrangement includes:
the device comprises a liquid storage tank 1, a check valve 2, a metal liquid inlet pipe 3, a centrifugal pump 4, a flowmeter 5, a fiber hose 6, a JM5930 dynamic signal testing system 7, a TNT detonation device 8, a fixed support 9, a protective cover 10, a pipeline reducing joint 11, an experiment pipeline 12, a dynamic displacement sensor 13, a dynamic strain sensor 14, a dynamic pressure sensor 15, a liquid outlet of the dynamic acceleration sensor liquid storage tank 1, the check valve 2, the metal liquid inlet pipe 3, the centrifugal pump 4, the flowmeter 5, the fiber hose 6, the pipeline reducing joint 11, the experiment pipeline 12, the fiber hose 6, a pressure gauge 18, the check valve 2 and a liquid inlet of the liquid storage tank 1 are sequentially connected 16, a pipeline combined support 17 and the pressure gauge 18;
wherein, the two ends of the experimental pipeline 12 are respectively connected with a pipeline reducer union 11 and a section of fiber hose 6, and the experimental pipeline 12 is rigidly fixed on the pipeline combined bracket 17; the TNT detonating device 8 is connected with the experiment pipeline 12, and the JM5930 dynamic signal testing system 7 is connected with the dynamic displacement sensor 13, the dynamic strain sensor 14, the dynamic pressure sensor 15 and the dynamic acceleration sensor 16; the dynamic displacement sensor 13, the dynamic strain sensor 14, the dynamic pressure sensor 15 and the dynamic acceleration sensor 16 are arranged on the experiment pipeline 12; the pipeline combined bracket 17 is fixedly arranged on the fixed support 9, the protective cover 10 is arranged on the fixed support 9, and the pipeline combined bracket 17 is protected by the protective cover 10;
the reservoir 1 is used for: storing liquid, wherein the liquid enters the experiment pipeline 12 through a liquid outlet of the liquid storage tank 1, the metal liquid inlet pipe 3 and the fiber hose 6 and flows back to the liquid storage tank 1 through the fiber hose 6 and a liquid inlet of the liquid storage tank 1;
the check valve 2 is used for: liquid flowing out of the liquid storage tank 1 through the liquid outlet of the liquid storage tank 1 is prevented from flowing back into the liquid storage tank 1, and liquid flowing into the liquid storage tank 1 through the liquid inlet of the liquid storage tank 1 flows back into the fiber hose 6;
the centrifugal pump 4 is used for: adjusting the flow rate of the liquid to simulate different flowing states of the liquid;
the flow meter 5 is configured to: measuring the flow and flow rate of the liquid flowing out of the liquid storage tank 1 through the liquid outlet of the liquid storage tank 1;
the TNT explosive device 8 is configured to: generating an explosive shock wave;
the dynamic displacement sensor 13, the dynamic strain sensor 14, the dynamic pressure sensor 15, and the dynamic acceleration sensor 16 are respectively configured to: measuring a displacement signal, a strain signal, a pressure signal and an acceleration signal of the experimental pipeline 12 under the action of the explosion shock wave;
the JM5930 dynamic signal test system 7 is configured to: acquiring the displacement signal, the strain signal, the pressure signal and the acceleration signal, and analyzing the displacement signal, the strain signal, the pressure signal and the acceleration signal to obtain a stress distribution rule and a structural response of the experimental pipeline 12 under the action of the explosion shock wave;
the pressure gauge 18 is used for: the pressure of the liquid flowing into the reservoir 1 through the liquid inlet of the reservoir 1 is measured.
In the embodiment of the invention, TNT is adopted as an explosion source, the explosion process of explosion and engineering explosion caused by pipeline leakage is simulated, and the action effect of a real explosion source is completely simulated; the method is not limited to the consideration of the contact coupling effect between the pipeline and the soil body, the fluid is used as a flowing medium in the pipeline, the real working condition of the buried pipeline is restored by controlling the flow rate of the medium, and the flowing state of the medium in the pipeline and the influence of the flowing state of the medium on the vibration condition of a coupling interface under the explosive impact load are considered; through the test of various sensors at different positions of the pipeline, the accurate test of stress, strain, acceleration and pressure of a coupling interface of the pipeline in a soil body is realized, and a calculation basis is provided for revealing the explosion response and failure of the long-distance buried oil and gas pipeline and the design of the buried pipeline.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a principle of an experimental testing device for parameters of an explosion-coupled interface of a buried pipeline according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an actual structure of an experimental testing device for parameters of an explosion-coupled interface of a buried pipeline according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a combined bracket for a pipeline according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a TNT adjustment support provided by an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a bracket of a dynamic displacement sensor according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram (two) of a dynamic displacement sensor support according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a frame part according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In an embodiment of the present invention, an experimental testing apparatus for parameters of an outburst coupling interface of a buried pipeline is provided, as shown in fig. 1 and 2, the apparatus includes: the device comprises a liquid storage tank 1, a check valve 2, a metal liquid inlet pipe 3, a centrifugal pump 4, a flowmeter 5, a fiber hose 6, a JM5930 dynamic signal testing system 7, a TNT detonating device 8, a fixed support 9, a protective cover 10, a pipeline reducer union 11, an experimental pipeline 12, a dynamic displacement sensor 13, a dynamic strain sensor 14, a dynamic pressure sensor 15, a liquid outlet of the dynamic acceleration sensor liquid storage tank 1, the check valve 2, the metal liquid inlet pipe 3, the centrifugal pump 4, the flowmeter 5, the fiber hose 6, the pipeline reducer union 11, the experimental pipeline 12, the fiber hose 6, a pressure gauge 18, the check valve 2 and a liquid inlet of the liquid storage tank 1 are sequentially connected with a pipeline combined bracket 16 and the pressure gauge 18;
wherein, the two ends of the experimental pipeline 12 are respectively connected with a pipeline reducer union 11 and a section of fiber hose 6, and the experimental pipeline 12 is rigidly fixed on the pipeline combined bracket 17; the TNT detonating device 8 is connected with an experimental pipeline 12, and the JM5930 dynamic signal testing system 7 is connected with a dynamic displacement sensor 13, a dynamic strain sensor 14, a dynamic pressure sensor 15 and a dynamic acceleration sensor 16; the dynamic displacement sensor 13, the dynamic strain sensor 14, the dynamic pressure sensor 15 and the dynamic acceleration sensor 16 are arranged on the experiment pipeline 12; the pipeline combined bracket 17 is fixedly arranged on the fixed support 9, the protective cover 10 is arranged on the fixed support 9, and the pipeline combined bracket 17 is protected by the protective cover 10;
the reservoir 1 is used for: storing liquid, wherein the liquid enters the experiment pipeline 12 through the liquid outlet of the liquid storage tank 1, the metal liquid inlet pipe 3 and the fiber hose 6 and flows back to the liquid storage tank 1 through the fiber hose 6 and the liquid inlet of the liquid storage tank 1;
the check valve 2 is used for: liquid flowing out of the liquid storage tank 1 through the liquid outlet of the liquid storage tank 1 is prevented from flowing back into the liquid storage tank 1, and liquid flowing into the liquid storage tank 1 through the liquid inlet of the liquid storage tank 1 flows back into the fiber hose 6;
the centrifugal pump 4 is used for: adjusting the flow rate of the liquid to simulate different flowing states of the liquid;
the flow meter 5 is configured to: measuring the flow and flow rate of the liquid flowing out of the liquid storage tank 1 through the liquid outlet of the liquid storage tank 1;
the TNT explosive device 8 is configured to: generating an explosive shock wave;
the dynamic displacement sensor 13, the dynamic strain sensor 14, the dynamic pressure sensor 15, and the dynamic acceleration sensor 16 are respectively configured to: measuring a displacement signal, a strain signal, a pressure signal and an acceleration signal of the experimental pipeline 12 under the action of the explosion shock wave;
the JM5930 dynamic signal test system 7 is configured to: acquiring the displacement signal, the strain signal, the pressure signal and the acceleration signal, and analyzing the displacement signal, the strain signal, the pressure signal and the acceleration signal to obtain a stress distribution rule and a structural response of the experimental pipeline 12 under the action of the explosion shock wave;
the pressure gauge 18 is used for: the pressure of the liquid flowing into the reservoir 1 through the liquid inlet of the reservoir 1 is measured.
In the embodiment of the invention, the JM5930 dynamic signal test system 7, the TNT detonating device 8, the dynamic displacement sensor 13, the dynamic strain sensor 14, the dynamic pressure sensor 15 and the dynamic acceleration sensor 16 are used as standard test instruments, and the ignition energy, the measurement range and the precision can be adjusted according to test requirements.
In the embodiment of the invention, in order to simulate the motion state of the fluid medium in the pipeline, the flow rate of the fluid is adjusted by the centrifugal pump 4 so as to simulate different flow states of the fluid. The liquid outlet of reservoir 1, check valve 2, metal feed liquor pipe 3, centrifugal pump 4, flowmeter 5, fiber flexible pipe 6, pipeline reducer union 11, experiment pipeline 12, fiber flexible pipe 6, manometer 18, check valve 2, the inlet of reservoir 1 connect gradually, make things convenient for the location of experimental apparatus and the dismantlement of experiment pipeline.
When experimental pipelines with different pipe diameters need to be replaced, the pipeline reducing joints 11 with different sizes only need to be replaced, and the front end liquid supply pipeline can be connected. After flowing through the experimental pipe 12, the fluid is circulated back to the reservoir 1 through the fiber hose 6 for recycling. A pressure gauge 18 is installed at the return end of the reservoir 1 to measure the pressure of the returned liquid.
In the embodiment of the invention, the TNT is adopted as the explosion source in the experiment, so that the generated explosion shock wave can generate non-negligible vibration influence on the experimental instrument, thereby influencing the accuracy of the experiment. The laboratory instrument therefore needs to be rigidly fixed. Meanwhile, in the experiment under different working conditions, the experiment pipelines 12 with different pipe diameters need to be replaced, and the pipe diameter change can cause the stability of the original mechanism to be invalid and needs to be readjusted. The position of the sensor needs to be readjusted due to the replacement of the experimental pipeline 12 and the change of the pipe diameter, and the pipeline combination bracket 17 is designed due to the higher difficulty and low accuracy of the operation. The structure of the pipe combination bracket 17 is schematically shown in fig. 3.
As shown in FIG. 3, the pipe combination bracket 17 may include a fastening bolt 17-1, a high-position baffle 17-2, a bracket main body 17-4, a side-position baffle 17-5 and a bracket top surface 17-7;
the support main body 17-4 is of a V-shaped structure, the experiment pipeline 12 is placed on the V-shaped structure, the center positioning of the experiment pipeline 12 with different pipe diameters is adjusted through the V-shaped structure, meanwhile, the experiment pipeline 12 is fixed through the fastening bolt 17-1 installed on the top surface 17-7 of the support, and the stability between the experiment pipeline and the pipeline combined support is guaranteed. Wherein the fastening bolt 17-1 may comprise two, which are located on two sides of the top surface 17-7 of the bracket, which are two sides perpendicular to the experimental pipe 12.
The bracket top surface 17-7 is arranged on the bracket main body 17-4, in practice, one side of the bracket top surface 17-7 can be movably connected with the bracket main body 17-4 through a hinge, so that the bracket top surface 17-7 rotates along the hinge, and the bracket top surface 17-7 can be rotated to facilitate the assembly and disassembly of the experimental pipeline 12. The bracket top surface 17-7 and the bracket main body 17-4 are magnetically fixed by mounting magnets so as to prevent the bracket top surface 17-7 from being displaced by explosive load to influence the fixation of the experimental pipeline.
The side position baffles 17-5 are arranged at two sides of the bracket main body 17-4, and the two sides are two sides which are vertical to the experimental pipeline 12; the high-position baffle 17-2 and the side-position baffle 17-5 jointly play a role in blocking the filled soil body, and meanwhile, unnecessary influence of the filled soil body on the sensor is avoided.
The high-position baffle 17-2 is movably connected with the top surface 17-7 of the bracket, and the experiment pipeline 12 can be assembled and disassembled by opening and closing the high-position baffle 17-2. Specifically, one side of the high-position baffle 17-2 can be movably connected with one side of the top surface 17-7 of the support through a hinge, the high-position baffle 17-2 rotates along the hinge, and the high-position baffle 17-2 can be rotated to facilitate quick assembly and disassembly of the experiment pipeline during experiments of different groups. Meanwhile, when the pipe diameter changes, the high-level baffle 17-2 can be ensured to naturally fall on the experimental pipeline, and the effect of blocking and filling soil is good.
In the embodiment of the present invention, as shown in fig. 3, the duct assembly support 17 may further include a TNT adjustment support 17-6 connected to the support main body 17-4 by a sliding rail, which is used for placing a TNT explosion source. The TNT adjusting bracket 17-6 is a movable structure, and the height and the center distance of an explosion source can be changed by controlling the locking sleeve structure, so that the explosion source can be flexibly arranged.
Fig. 4 is a schematic structural view of the TNT adjustment support 17-6, and as shown in fig. 4, the TNT adjustment support 17-6 includes a horizontal adjustment locking sleeve 17-6-1, a vertical adjustment locking sleeve 17-6-2, and a TNT placement platform 17-6-3;
the horizontal adjusting locking sleeve 17-6-1 is vertically connected with the vertical adjusting locking sleeve 17-6-2 in an intersecting mode, the horizontal adjusting locking sleeve 17-6-1 is connected with the support main body 17-4 through a sliding rail, the horizontal adjusting locking sleeve 17-6-1 is adjusted through the sliding rail, the horizontal position and the explosive center distance of an explosive point can be changed, and the length of the support can be flexibly and accurately controlled through the horizontal adjusting locking sleeve 17-6-1. The height of a TNT explosion source can be changed by adjusting the vertical adjusting locking sleeve 17-6-2, and the height difference generated by the change of the pipe diameter can be flexibly adapted when an experiment pipeline is replaced. The TNT placing platform 17-6-3 is installed at the top end of the vertical adjusting locking sleeve 17-6-2 and used for placing a TNT explosion source.
In the embodiment of the present invention, as shown in fig. 3, the pipe combination support 17 may further include a dynamic displacement sensor support 17-3, a bottom end of which is connected to a bottom end of the support main body 17-4 through a sliding rail, and the dynamic displacement sensor support is used for fixing the dynamic displacement sensor 13, so that a horizontal position of the dynamic displacement sensor 13 can be flexibly changed, and measurement at different positions is facilitated.
FIG. 5 is a schematic structural diagram of a dynamic displacement sensor holder 17-3, and as shown in FIG. 5, the dynamic displacement sensor holder 17-3 includes a dynamic displacement sensor holder main body 13-1, a positioning nut 13-3, a dynamic displacement sensor holder 13-4, and a dynamic displacement sensor mounting platform 13-5;
the top end of the dynamic displacement sensor support main body part 13-1 is connected with the dynamic displacement sensor placing platform 13-5 through a positioning nut 13-3, and the dynamic displacement sensor support main body part 13-1 is vertically intersected with the dynamic displacement sensor placing platform 13-5; the bottom end 13-2 of the main body part 13-1 of the dynamic displacement sensor bracket is connected with the pipeline combination 17 through a sliding rail; the dynamic displacement sensor 13 is fixed on the dynamic displacement sensor mounting platform 13-5 through a dynamic displacement sensor fixer 13-4; the dynamic displacement sensor fixer 13-4 is inserted into a reserved hole on the dynamic displacement sensor placing platform 13-5.
The structure of the dynamic displacement sensor support 17-3 can only indicate that the dynamic displacement sensor support 17-3 is a device with a fixed height and a movable horizontal position, and in practice, the dynamic displacement sensor support 17-3 can be designed to be a device with a variable height, so that the high-low placing position of the dynamic displacement sensor 13 is changed.
Specifically, as shown in fig. 6, the upper portion of the dynamic displacement sensor holder main body portion 13-1 may have a threaded structure; the set nut 13-3 includes two. At this time, one side of the dynamic displacement sensor mounting platform 13-5 comprises a hole, the upper part of the dynamic displacement sensor support main body part 13-1 penetrates through the dynamic displacement sensor mounting platform 13-5 through the hole, the dynamic displacement sensor support main body part 13-1 is connected with the dynamic displacement sensor mounting platform 13-5 through the positioning nuts 13-3 on the upper side and the lower side, and therefore the height of the dynamic displacement sensor mounting platform 13-5 is adjusted through the two positioning nuts 13-3.
In addition, as shown in fig. 6, the number of the reserved hole sites on the dynamic displacement sensor placement platform 13-5 is multiple, and the distance between the dynamic displacement sensor 13 and the experiment pipeline 12 is adjusted through the multiple reserved hole sites.
In the embodiment of the invention, the device considers the flowing state of the medium in the pipe and the influence of the flowing state of the medium on the vibration condition of the coupling interface under the explosion impact load, so that all dynamic sensors used for experiments can be arranged on the back explosion side of the experiment pipeline. In order to measure the conditions of strain, pressure, displacement, acceleration and the like of different point positions of the experimental pipeline, the dynamic displacement sensor 13, the dynamic strain sensor 14, the dynamic pressure sensor 15 and the dynamic acceleration sensor 16 are symmetrically arranged by taking the explosion point on the experimental pipeline 12 as a center.
Wherein, the dynamic pressure sensor 15 and the dynamic acceleration sensor 16 are connected with the experiment pipeline 12 through a magnetic seat; one side of a magnet of the magnetic seat is magnetically connected with the experimental pipeline 12, and one side of a thread of the magnetic seat is connected with the dynamic pressure sensor 15 and the dynamic acceleration sensor 16. The dynamic strain sensor 14 may be directly attached to the position to be measured of the test tube 12.
In the embodiment of the invention, in order to support the whole main body part of the test pipeline and realize visualization and protection in the test process of an experiment, the structural design of the frame part is carried out, the frame part mainly comprises a fixed support 9 and a protective cover 10, and the fixed support 9 provides a stable platform for the experiment.
As shown in fig. 1, the fixed support 9 includes a plurality of reserved holes distributed at different positions on the fixed support, and the plurality of reserved holes allow the fiber hose 6, the detonating cord of the TNT detonating device 8, the dynamic displacement sensor 13, the dynamic strain sensor 14, the dynamic pressure sensor 15, and the dynamic acceleration sensor 16 to pass through, thereby facilitating installation.
As shown in fig. 7, the fixing support 9 includes a plurality of positioning slots distributed at different positions on the fixing support, and the fixing support 9 and the protective cover 10 are fixed and positioned by the plurality of positioning slots, and/or the pipeline combined bracket 17 is fixed and positioned.
As shown in FIG. 7, the protection cover 10 is a rectangular parallelepiped, and includes a front operating window 10-1, a rear operating window 10-2, an upper operating window 10-3, two side windows, and a shutter.
The front operation window 10-1, the rear operation window 10-2 and the upper operation window 10-3 can be independently opened and closed, and corresponding operation of the buried pipeline external explosion coupling interface parameter experiment can be realized by opening and closing the front operation window 10-1, the rear operation window 10-2 and the upper operation window 10-3 when different groups of experiments are carried out. For example, the sensor position can be adjusted by opening the front window 10-1, and the distance between the centers of detonation and the amount of explosive can be adjusted by opening the rear window 10-2. When the filled soil body is replaced, the rear operation window 10-2 is opened for cleaning, the upper operation window 10-3 is opened for medium filling, and the filled soil body only needs to be filled with one side where the explosive load is applied. When the experiment pipeline needs to be replaced, the whole protective cover 10 can be taken down, so that the installation of the experiment pipeline and the arrangement of the sensors are facilitated. Meanwhile, the protective cover 10 also plays a role in protection, and people are prevented from being injured by explosive loads. Meanwhile, experimental phenomena can be observed.
Specifically, as shown in fig. 7, a front operating window 10-1, a rear operating window 10-2, and an upper operating window 10-3 may respectively include a handle, and the front operating window 10-1, the rear operating window 10-2, and the upper operating window 10-3 are opened and closed by the handles, so as to complete corresponding operations of the buried pipeline implosion coupling interface parameter experiment.
The front operating window 10-1, the rear operating window 10-2 and the upper operating window 10-3 can also be set as sliding doors, the front operating window 10-1, the rear operating window 10-2 and the upper operating window 10-3 are opened and closed through sliding operation, and corresponding operation of an external explosion coupling interface parameter experiment of the buried pipeline is completed.
The baffles are respectively positioned on the windows at the two sides and play a role of blocking a filled soil body added into the protective cover when an explosion coupling interface parameter experiment of the buried pipeline is carried out with the high-position baffle 17-2 and the side-position baffle 17-5 in the pipeline combined bracket 17, so that the cleanness of one side of the sensor is ensured, and the adjustment of the sensor is more convenient.
During a specific experiment, the buried pipeline external explosion coupling interface parameter experiment testing device is installed as follows:
(1) Firstly, a liquid storage tank 1 is placed at a proper position, a pipeline combined bracket 17 is placed on a fixed support 9, and a positioning clamping groove is used for positioning and fixing. The test tube 12 is mounted on the tube assembly support 17. The liquid storage tank 1, the check valve 2, the centrifugal pump 4 and the flowmeter 5 are sequentially connected by adopting a metal liquid inlet pipe 3, and the flowmeter 5 is connected with the fiber hose 6. After the fiber hose 6 penetrates into the reserved hole of the fixed support 9, the tail end of the fiber hose 6 is connected with the pipeline reducer union 11, and the other end of the pipeline reducer union 11 is connected with the experimental pipeline 12. The tail end of the experiment pipeline 12 is connected with the fiber hose 6 through another pipeline reducing joint 11, penetrates out of a preformed hole of the fixed support 9 and is connected with a pressure gauge 18, and the pressure gauge 18 is connected with another check valve 2 through threads and is finally connected with the liquid storage tank 1.
(2) And respectively sticking the dynamic strain sensor 14, the dynamic pressure sensor 15 and the dynamic acceleration sensor 16 to the position to be measured of the experimental pipeline. And the dynamic displacement sensors 13 are respectively fixed on the dynamic displacement sensor supports to adjust the height and position of the dynamic displacement sensor supports. All sensors are fixed, and the upper end face of the pipeline combined support 17 is laid down and is fixed magnetically. While the baffles are naturally hung over the experimental pipe 12. The height and the position of the explosive source bracket of the pipeline combined bracket 17 are adjusted to ensure that the explosive is positioned in the center of the experimental pipeline. And finally, tightening the fastening bolts at the two sides of the pipeline combined bracket 17 to finish fixing. The detonator and all the sensor wires are led out of the fixed support 9 from the prepared hole. Finally, the protective cover 10 is placed on the fixed support 9.
(3) All sensors are wired on the JM5930 dynamic signal testing system 7, and the system is connected with a computer. The detonating cord is connected with the TNT detonating device 8, and the whole set of experimental device is connected.
The experimental procedure is described in detail below.
Because the experimental device contains flammable and explosive media, the experimental device is executed strictly according to the operation flow in the test process, and dangerous accidents are avoided. The specific test steps are as follows:
(1) Before the experimental testing device is started, the fastening degree of connecting threads of each part of the experimental device must be checked, whether each part is intact or not and the air tightness is good, and the valves are ensured to be in a closed state, a testing instrument is not electrified, and an experimental site has no open fire;
(2) After the front operation window 10-1 and the rear operation window 10-2 are ensured to be closed, the upper operation window 10-3 is opened to fill soil into the protective cover 10, and the operation windows are closed after the filling is finished. And closing the check valve 2, injecting liquid into the liquid storage tank 1, injecting the required liquid amount into the liquid storage tank according to the experimental requirements, opening all valves after the liquid injection is completed, opening the centrifugal pump 4, and reading out the liquid flow and recording the flow speed through the flowmeter 5. After the reading of the flowmeter 5 and the reading of the pressure gauge 18 are stable, the experiment can be started;
(3) Personnel are evacuated to a safe range, a power supply of the dynamic signal testing system is started, instrument balance is adjusted, and the TNT detonating device 8 is started to detonate the TNT;
(4) Data acquisition is carried out through a dynamic signal testing system, and when all sensors are observed to be in a lower value and maintain for a longer time without changing, the testing process is finished;
(5) The power supply of the dynamic signal test system 7 and the TNT detonating device 8 is turned off, and the centrifugal pump 4 and the check valve 2 are turned off. If the experiment pipeline is not replaced, the explosive is replaced only by opening the rear operation window 10-2. When the sensor test position needs to be changed, the front operating window 10-1 is opened for adjustment.
(6) If the experimental pipeline needs to be replaced, the matched pipeline reducer union 11 needs to be replaced. When the operation window 10-3 is replaced, the upper operation window 10-3 can be opened, and the protective cover 10 can be integrally taken down. And (6) repeating the steps (1) to (5) after the replacement is finished, and carrying out the next test process.
The experimental test device adopts TNT as an explosion source and simulates the explosion process of explosion and engineering explosion caused by pipeline leakage. In order to simulate the pressure transmission and fluid action of chemical products such as oil gas and the like, the conveying medium in the experimental model is replaced by water. The fluid in the real pipeline is simulated by injecting water through the liquid injection part, and if different fluid conditions in the pipeline are analyzed, the fluid can be obtained by changing the properties of the injected fluid and changing the flowing state of the fluid. Arranging high-frequency dynamic pressure sensors (with the measuring range of more than 60 MPa), dynamic acceleration sensors (with the measuring range of more than 10 g) and foil wire type resistance strain gauges on the back explosion surfaces at the two ends and the middle part of the outer wall of the pipeline respectively, and arranging dynamic displacement sensors on the back explosion surfaces of the pipeline; and simultaneously, a flowmeter and a pressure gauge are respectively arranged at the inlet and the outlet of the pipeline and used for measuring the flow and the pressure of the fluid in the pipeline. The method comprises the steps of measuring various physical quantities of coupling interfaces of fluid, pipelines and soil bodies and response change rules of the pipelines by changing the flow rate of the fluid, the explosive load and the explosive center distance, the diameter of an experimental pipeline, the wall thickness and the soil body components. The electric signal collected by the sensor is converted by the dynamic signal testing system to finally form a visual signal, and the multiphase coupling parameter transmission rule of the coupling interface of the fluid, the pipeline and the soil body and the stress distribution rule and the response form under the transient impact action of the pipeline structure under the condition of external explosion are researched by sorting and analyzing the measured data, so that a theoretical basis is provided for the design of the buried pipeline structure and the numerical simulation analysis.
In summary, compared with the similar test device, the experimental device takes TNT as an explosion source and completely simulates the action effect of a real explosion source in principle; the method is not limited to considering the contact coupling effect between the pipeline and the soil body, fluid is used as a flowing medium in the pipeline, the real working condition of the buried pipeline is restored by controlling the flow rate of the medium, and the flowing state of the medium in the pipeline and the influence of the medium on the vibration condition of a coupling interface under the explosive impact load are considered; by applying a dynamic test experiment technology and according to the principles of structural similarity, mass similarity and rigidity similarity, strain, acceleration, pressure and displacement of the liquid filling pipeline at different positions of the pipeline are dynamically tested by various sensors, so that the stress, strain, acceleration and pressure of a coupling interface of the pipeline in a soil body are accurately tested. And analyzing the stress distribution rule and the structural response of the liquid filling pipeline under the action of the transient load. The method researches the multiphase coupling transient dynamic response of the fluid in the pipeline and the soil body, discusses the interaction rule of the displacement, pressure, acceleration and other physical parameters of the coupling interface, and can provide theoretical basis and scientific basis for long-distance oil and gas pipeline design, blasting construction risk assessment and the like.
The experimental testing device is more perfect, the testing range is wide, the precision is high, the transient response of the pipeline structure under multiphase coupling is more accurately described, and the accurate measurement of the coupling interface load of the fluid, the pipeline and the soil body is realized.
Structurally, the experimental device is simple in structure, high in integration degree, flexible to use, visual in phenomenon, different from common explosion experiments, capable of achieving repeated experiments and low in cost, and is easy to disassemble. The teaching and scientific research integrated machine is suitable for teaching and scientific research units to carry out related teaching and scientific research works.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (20)
1. The utility model provides a buried pipeline external explosion coupling interface parameter experiment testing arrangement which characterized in that includes: the device comprises a liquid storage tank (1), a check valve (2), a metal liquid inlet pipe (3), a centrifugal pump (4), a flowmeter (5), a fiber hose (6), a JM5930 dynamic signal testing system (7), a TNT detonating device (8), a fixed support (9), a protective cover (10), a pipeline reducing joint (11), an experimental pipeline (12), a dynamic displacement sensor (13), a dynamic strain sensor (14), a dynamic pressure sensor (15), a dynamic acceleration sensor (16), a pipeline combined support (17) and a pressure gauge (18);
the device comprises a liquid storage tank (1), a check valve (2), a metal liquid inlet pipe (3), a centrifugal pump (4), a flowmeter (5), a fiber hose (6), a pipeline reducing joint (11), an experimental pipeline (12), the fiber hose (6), a pressure gauge (18), the check valve (2) and a liquid inlet of the liquid storage tank (1) which are sequentially connected, wherein two ends of the experimental pipeline (12) are respectively connected with the pipeline reducing joint (11) and a section of the fiber hose (6), and the experimental pipeline (12) is rigidly fixed on a pipeline combined support (17); the TNT detonating device (8) is connected with an experimental pipeline (12), and the JM5930 dynamic signal testing system (7) is connected with a dynamic displacement sensor (13), a dynamic strain sensor (14), a dynamic pressure sensor (15) and a dynamic acceleration sensor (16); the dynamic displacement sensor (13), the dynamic strain sensor (14), the dynamic pressure sensor (15) and the dynamic acceleration sensor (16) are arranged on the experiment pipeline (12); the pipeline combined support (17) is fixedly arranged on the fixed support (9), the protective cover (10) is arranged on the fixed support (9), and the pipeline combined support (17) is protected by the protective cover (10);
the reservoir (1) is configured to: storing liquid, wherein the liquid enters the experiment pipeline (12) through a liquid outlet of the liquid storage tank (1), the metal liquid inlet pipe (3) and the fiber hose (6) and flows back into the liquid storage tank (1) through the fiber hose (6) and a liquid inlet of the liquid storage tank (1);
the check valve (2) is used for: liquid flowing out of the liquid storage tank (1) through the liquid outlet of the liquid storage tank (1) is prevented from flowing back into the liquid storage tank (1), and liquid flowing into the liquid storage tank (1) through the liquid inlet of the liquid storage tank (1) flows back into the fiber hose (6);
the centrifugal pump (4) is used for: adjusting the flow rate of the liquid to simulate different flowing states of the liquid;
the flow meter (5) is configured to: measuring the flow and the flow speed of the liquid flowing out of the liquid storage tank (1) through the liquid outlet of the liquid storage tank (1);
the TNT initiation device (8) is configured to: generating an explosive shock wave;
the dynamic displacement sensor (13), the dynamic strain sensor (14), the dynamic pressure sensor (15) and the dynamic acceleration sensor (16) are respectively used for: measuring displacement signals, strain signals, pressure signals and acceleration signals of the experimental pipeline (12) under the action of the explosion shock waves;
the JM5930 dynamic signal testing system (7) is configured to: acquiring the displacement signal, the strain signal, the pressure signal and the acceleration signal, and analyzing the displacement signal, the strain signal, the pressure signal and the acceleration signal to obtain a stress distribution rule and a structural response of the experimental pipeline (12) under the action of the explosion shock wave;
the pressure gauge (18) is configured to: the pressure of the liquid flowing into the liquid storage tank (1) through the liquid inlet of the liquid storage tank (1) is measured.
2. The experimental testing device for the parameters of the buried pipeline external explosion coupling interface of claim 1, wherein the fixed support (9) comprises a plurality of reserved hole sites which are distributed at different positions on the fixed support;
the plurality of reserved holes are used for: connecting lines of a fiber hose (6), a detonating cord of a TNT detonating device (8), a dynamic displacement sensor (13), a dynamic strain sensor (14), a dynamic pressure sensor (15) and a dynamic acceleration sensor (16) are penetrated.
3. The experimental testing device for the parameters of the external explosion coupling interface of the buried pipeline as claimed in claim 1 or 2, characterized in that the fixed support (9) comprises a plurality of positioning clamping grooves distributed at different positions on the fixed support;
the plurality of locator card slots are configured to: -fixing and positioning the protective cover (10);
and/or fixing and positioning the pipeline combined bracket (17).
4. The experimental testing device for the parameters of the buried pipeline external explosion coupling interface of claim 1, wherein the protective cover (10) is a cuboid and comprises a front operating window (10-1), a rear operating window (10-2), an upper operating window (10-3), two side windows and a baffle plate, wherein the baffle plate is respectively positioned on the two side windows;
the front operation window (10-1), the rear operation window (10-2) and the upper operation window (10-3) are independently opened and closed, and corresponding operation of an external explosion coupling interface parameter experiment of the buried pipeline is realized by opening and closing the front operation window (10-1), the rear operation window (10-2) and the upper operation window (10-3);
the baffle is used for: and blocking the filled soil body added into the protective cover when the buried pipeline external explosion coupling interface parameter experiment is carried out.
5. The buried pipeline external explosion coupling interface parameter experiment testing device as recited in claim 4, characterized in that the front operating window (10-1), the rear operating window (10-2) and the upper operating window (10-3) respectively comprise a handle, and the front operating window (10-1), the rear operating window (10-2) and the upper operating window (10-3) are opened and closed through the handles, so as to complete the corresponding operation of the buried pipeline external explosion coupling interface parameter experiment.
6. The experimental testing device for the buried pipeline external explosion coupling interface parameter is characterized in that the front operating window (10-1), the rear operating window (10-2) and the upper operating window (10-3) are arranged as sliding doors, and the front operating window (10-1), the rear operating window (10-2) and the upper operating window (10-3) are opened and closed through sliding operation, so that the corresponding operation of the buried pipeline external explosion coupling interface parameter experiment is completed.
7. The buried pipeline external explosion coupling interface parameter experiment testing device as recited in claim 1, characterized in that the dynamic displacement sensor (13) and the dynamic strain sensor (14), the dynamic pressure sensor (15) and the dynamic acceleration sensor (16) are symmetrically arranged with the explosion point on the experimental pipeline (12) as the center.
8. The buried pipeline external explosion coupling interface parameter experiment testing device as recited in claim 1, characterized in that the dynamic displacement sensor (13) and the dynamic strain sensor (14), the dynamic pressure sensor (15) and the dynamic acceleration sensor (16) are uniformly arranged on the back explosion side of the experiment pipeline (12).
9. The experimental testing device for the parameters of the buried pipeline external explosion coupling interface of claim 1, wherein the dynamic pressure sensor (15) and the dynamic acceleration sensor (16) are connected with the experimental pipeline (12) through magnetic seats; one side of a magnet of the magnetic seat is magnetically connected with the experimental pipeline (12), and one side of a thread of the magnetic seat is connected with the dynamic pressure sensor (15) and the dynamic acceleration sensor (16).
10. The experimental testing device for the parameters of the buried pipeline implosion coupling interface as recited in claim 1, characterized in that the dynamic strain sensor (14) is directly stuck on the position to be tested of the experimental pipeline (12).
11. The experimental testing device for the parameters of the buried pipeline external explosion coupling interface of claim 1, wherein the pipeline combined bracket (17) comprises a fastening bolt (17-1), a bracket main body (17-4), a high-position baffle (17-2), a side baffle (17-5) and a bracket top surface (17-7);
the support main body (17-4) is of a V-shaped structure, the experimental pipeline (12) is placed on the V-shaped structure, and the center positioning of the experimental pipeline (12) with different pipe diameters is adjusted through the V-shaped structure; the fastening bolt (17-1) is mounted on the top surface (17-7) of the bracket, and the experimental pipeline (12) is fixed through the fastening bolt (17-1); the bracket top surface (17-7) is arranged on the bracket main body (17-4); the high-position baffle (17-2) is movably connected with the top surface (17-7) of the support, and the experiment pipeline (12) is assembled and disassembled by opening and closing the high-position baffle (17-2); the side position baffles (17-5) are arranged on two sides of the bracket main body (17-4); the high position baffle (17-2) and the side position baffle (17-5) play a role in blocking the filled soil body.
12. The experimental testing device for the parameters of the buried pipeline external explosion coupling interface of claim 11, wherein one side of the high-position baffle plate (17-2) is movably connected with one side of the top surface (17-7) of the support through a hinge, and the high-position baffle plate (17-2) rotates along the hinge.
13. The experimental testing device for the parameters of the external explosion coupling interface of the buried pipeline as claimed in claim 11, characterized in that one side of the top surface (17-7) of the bracket is movably connected with the main body (17-4) of the bracket through a hinge, and the top surface (17-7) of the bracket rotates along the hinge.
14. The experimental testing device for the parameters of the buried pipeline external explosion coupling interface of claim 13, wherein the top surface (17-7) of the bracket and the main body (17-4) of the bracket are magnetically fixed by installing magnets.
15. The experimental testing device for the parameters of the buried pipeline external explosion coupling interface of claim 11, wherein the pipeline combined bracket (17) further comprises a dynamic displacement sensor bracket (17-3) which is connected with a bracket main body (17-4) through a sliding rail;
the dynamic displacement sensor support (17-3) is configured to: a stationary dynamic displacement sensor (13).
16. The experimental testing device for the parameters of the buried pipeline external explosion coupling interface of claim 15, wherein the dynamic displacement sensor bracket (17-3) comprises a main body part (13-1) of the dynamic displacement sensor bracket, a positioning nut (13-3), a dynamic displacement sensor fixer (13-4) and a dynamic displacement sensor placing platform (13-5);
the dynamic displacement sensor support main body part (13-1) is connected with the dynamic displacement sensor placing platform (13-5) through a positioning nut (13-3), and the dynamic displacement sensor support main body part (13-1) is vertically intersected with the dynamic displacement sensor placing platform (13-5); the main body part (13-1) of the dynamic displacement sensor bracket is connected with the pipeline combined bracket (17) through a sliding rail; the dynamic displacement sensor (13) is fixed on the dynamic displacement sensor placing platform (13-5) through a dynamic displacement sensor fixer (13-4); the dynamic displacement sensor fixer (13-4) is inserted into a reserved hole on the dynamic displacement sensor placing platform (13-5).
17. The experimental testing device for the parameters of the external explosion coupling interface of the buried pipeline as recited in claim 15, characterized in that the upper part of the main body part (13-1) of the dynamic displacement sensor support is of a threaded structure;
the positioning nuts (13-3) comprise two;
one side of the dynamic displacement sensor placing platform (13-5) comprises a hole, the upper part of the dynamic displacement sensor support main body part (13-1) penetrates through the dynamic displacement sensor placing platform (13-5) through the hole, and the dynamic displacement sensor support main body part (13-1) is connected with the dynamic displacement sensor placing platform (13-5) through positioning nuts (13-3) on the upper side and the lower side;
the two positioning nuts (13-3) are used for: and adjusting the height of the dynamic displacement sensor placing platform (13-5).
18. The experimental testing device for the parameters of the implosion coupling interface of the buried pipeline as claimed in claim 16, wherein the number of the reserved hole sites on the platform (13-5) for placing the dynamic displacement sensor is multiple, and the distance between the dynamic displacement sensor (13) and the experimental pipeline (12) is adjusted through the multiple reserved hole sites.
19. The buried pipeline external explosion coupling interface parameter experiment testing device as recited in claim 11, characterized in that the pipeline combination bracket (17) further includes a TNT adjustment bracket (17-6) connected with the bracket main body (17-4) through a slide rail;
the TNT-tuning stent (17-6) is configured to: and (4) placing a TNT explosion source.
20. The buried pipeline external explosion coupling interface parameter experiment testing device as recited in claim 19, wherein the TNT adjusting bracket (17-6) comprises a horizontal adjusting locking sleeve (17-6-1), a vertical adjusting locking sleeve (17-6-2), and a TNT placing platform (17-6-3);
the horizontal adjusting locking sleeve (17-6-1) is vertically connected with the vertical adjusting locking sleeve (17-6-2) in an intersecting manner, and the horizontal adjusting locking sleeve (17-6-1) is connected with the bracket main body (17-4) through a sliding rail; the horizontal position of an explosion point is changed by adjusting the horizontal adjusting locking sleeve (17-6-1) through a sliding rail; the height of the TNT explosion source is changed by adjusting the vertical adjusting locking sleeve (17-6-2); the TNT placement platform (17-6-3) is installed at the top end of the vertical adjusting locking sleeve (17-6-2) and used for placing a TNT explosion source.
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| CN112924306B (en) * | 2021-01-29 | 2024-03-01 | 西安石油大学 | Hinge buffering self-anchored buried oil-gas pipeline static explosion experimental device |
| CN113836680B (en) * | 2021-11-25 | 2022-03-08 | 德仕能源科技集团股份有限公司 | Automatic filling method and technology for petroleum oil pipe |
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