CN116026543A - Test method for testing stress and vibration of heavy truck rolling oil pipeline - Google Patents
Test method for testing stress and vibration of heavy truck rolling oil pipeline Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 191
- 238000010998 test method Methods 0.000 title claims abstract description 20
- 239000010731 rolling oil Substances 0.000 title claims abstract description 17
- 239000003921 oil Substances 0.000 claims abstract description 81
- 238000005096 rolling process Methods 0.000 claims abstract description 41
- 230000001133 acceleration Effects 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 238000002347 injection Methods 0.000 claims description 22
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- 230000000087 stabilizing effect Effects 0.000 claims description 11
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- 238000013461 design Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 7
- 238000005056 compaction Methods 0.000 claims description 6
- 238000011156 evaluation Methods 0.000 claims description 4
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- 230000005489 elastic deformation Effects 0.000 claims description 2
- 230000002427 irreversible effect Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
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Abstract
The invention discloses a test method for testing stress and vibration of a heavy vehicle rolling navigation pipeline, which comprises the steps of designing a vehicle driving route; digging a test operation pit; selecting a test oil pipeline and installing a stress and vibration test system for testing the rolling oil pipeline of the heavy truck; placing a test oil pipeline in a test operation pit; sticking a strain gauge and an accelerometer on a test part of a test oil pipeline; backfilling test operation pits; pressurizing a pipeline, carrying out a heavy truck rolling test on an oil pipeline, and recording strain and acceleration values of the pipeline in the rolling process; and (5) rapidly evaluating the rolling hazard of the ground navigation oil pipeline. According to the method, strain gauges and accelerometers are stuck on a test pipeline, a heavy truck rolls a buried pipeline at a certain load and speed, maximum stress and vibration acceleration of the pipeline in the whole rolling process under various working conditions are obtained, a certain field guiding experience is provided for reducing the risk of damage of a third party of the oil pipeline, and the capability of preventing and controlling the risk of the third party of the oil pipeline is improved.
Description
Technical Field
The invention relates to a test method for testing stress and vibration of a heavy truck rolling oil pipeline, and belongs to the technical field of mechanical testing.
Background
Long-distance oil conveying pipeline plays a vital role in airport oil supply engineering, and whether the pipeline runs safely or not directly influences the oil supply condition and flight safety of airport oil. With the vigorous development of national aviation industry in recent years, the engineering construction of the oil pipeline is obviously increased, and the corresponding construction scale is also continuously expanded, specifically in the following steps: firstly, the transmission distance of the oil pipeline is long, and the transmission distance can reach hundreds of kilometers from a first station oil refinery to a last station airport; secondly, the types of the regions along the pipeline laying line are complex and various, so that the pipeline laying line cannot be avoided from crossing the regions such as hills and hills, urban and rural administrative and the like, social environments along the way are complex, and natural environments are changeable. The ground activities around the buried oil pipeline are frequent, a temporary construction road is newly built above the pipeline, under the condition that no additional protection measures are taken, the pipeline is repeatedly rolled by heavy construction vehicles, the risk of third party construction damage such as vehicle rolling and the like facing the oil pipeline is gradually increased, once a damage accident occurs, huge economic loss is caused for pipeline operation enterprises, great loss is caused for lives and properties of people along the pipeline, great negative effects are caused on the aspects of airport navigation stopping, ecological environment along the pipeline, social stability, public safety and the like, social disaster is even caused by deflagration accidents, and the safety, health, rapidness and sustainable development of pipeline logistics industry are also greatly influenced to a certain extent.
The load born by the pipe section where the oil pipeline and the road cross mainly comprises constant load such as dead weight of the pipeline structure, soil pressure and the like, active load such as rolling load of vehicles, ground pile load, temperature load, internal pressure of the pipeline and the like, and the influence of the vehicle load on the normal operation of the pipeline in the active load takes the main place. The current road transportation has the characteristics of increased traffic flow, increased load, increased speed and the like, so that the dynamic damage effect of the road surface under the rolling action of the vehicle is serious, and an overloaded vehicle becomes a main cause of road bridge damage in a new construction area, and although the vehicle is not directly rolled on a pipeline, the load of the vehicle is finally transferred to a pipe body through the transfer of the road surface and soil body, so that the pipe body is stressed, and potential safety hazards are generated for the safe operation of the pipeline.
The buried oil pipeline under the new road has no additional protection measures, the heavy vehicle rolls above the pipeline for a long time, the vehicle-mounted force born by the pipeline and the damage condition caused by repeated rolling of the vehicle are not known to enterprises, and serious challenges are brought to the safe operation of the pipeline, so that a test method capable of testing the stress condition of the buried oil pipeline under the heavy vehicle rolling is needed.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a test method for testing stress and vibration of a heavy truck rolling oil pipeline.
The technical scheme provided by the invention for solving the technical problems is as follows: a test method for testing stress and vibration of a heavy truck rolling oil pipeline comprises the following steps:
step S10, designing a vehicle driving route according to basic parameters of the test heavy vehicle;
step S20, determining the size of a test operation pit according to the width of the trench bottom, the burial depth and the side slope ratio, and excavating the test operation pit according to the size;
s30, selecting a test oil pipeline and installing a stress and vibration test system for testing the rolling compaction oil pipeline of the heavy truck;
s40, placing the test oil pipeline in a test operation pit, and testing the pressure of the test oil pipeline;
s50, sticking a strain gauge and an accelerometer on a test part of a test oil pipeline, and electrically connecting the strain gauge and the accelerometer with a multichannel stress strain dynamic acquisition instrument;
step S60, debugging a strain gauge, an accelerometer and a multi-channel stress strain dynamic acquisition instrument;
step S70, backfilling test operation pits;
s80, pressurizing the pipeline, testing the aviation pipeline by using a heavy truck, and recording the strain and acceleration values of the pipeline in the rolling process;
and step S90, rapidly evaluating the vehicle rolling hazard of the ground navigation pipeline according to the strain and acceleration value burial of the pipeline in the rolling process.
The further technical scheme is that in the step S20, a calculation formula of the trench bottom width with the depth within 5m is:
B＝D m +K
wherein: b is the width of the bottom of the ditch, m; dm is the outer diameter of the experimental oil pipeline, m; k is the widening allowance of the trench bottom and m.
The further technical scheme is that the test operation pit is in the shape of four kinds of straight grooves, trapezoid grooves, mixed grooves and stepped grooves.
The further technical scheme is that the test oil pipeline is formed by welding 3 test pipelines with the length of 8-12m in a head-tail mode.
The stress and vibration test system for the rolling compaction oil pipeline of the heavy truck comprises a test oil pipeline, a power supply device, a pipeline pump, a high-pressure hose and a pressure gauge, wherein the left end of the test oil pipeline is provided with a pressure test pipe and a water injection pipe, and the right end of the test oil pipeline is provided with a drain pipe; the outlet of the pipeline pump is communicated with a water injection pipe through a high-pressure hose, and ball valves are arranged on the water injection pipe, the drain pipe and the pressure test pipe; the power supply device is electrically connected with the pipeline pump; the pressure gauge is arranged on the water injection pipe.
In a further technical scheme, in the step S40, in the excavated test operation pit, a soil bag is used for stacking cushion layers at intervals of 5 meters, the height is 30cm, and then the test oil pipeline is lifted and placed into the test operation pit.
The further technical scheme is that the specific process of pressure test in step S40 is as follows: the method comprises the steps of opening a switch of a power supply device and a pipeline pump, filling water into a test oil pipeline, closing the pipeline pump, closing ball valves on a water injection pipe and a drain pipe, connecting a high-pressure hose with the pipeline pump and a pressure test pipe respectively, performing strength pressure test, wherein the pressure is 1.5 times of the design pressure of the oil pipeline, opening the pipeline pump, gradually increasing the pressure, sequentially increasing the pressure according to four stages of 30%, 60%, 90% and 100%, stabilizing the pressure for 10min at each stage, wherein the pressure increasing speed is not more than 0.1MPa/min, continuously increasing the pressure after no leakage is detected, stabilizing the pressure for 4 hours after the pressure is increased, and determining that the strength pressure test is qualified if the test oil pipeline is free of deformation and no leakage; and then performing tightness pressure test, namely gradually increasing the water pressure in the test oil pipeline to the design pressure, stabilizing the pressure for 24 hours, and if the pressure drop of the test oil pipeline is not more than 1% of the test pressure value and not more than 0.1MPa in the pressure stabilizing period, judging that the tightness pressure test is qualified.
The further technical scheme is that in the step S70, backfilling is required to be carried out by using excavated soil, the backfilled soil is leveled and compacted with a test site, and meanwhile, the water injection and drainage pipelines are not damaged.
According to a further technical scheme, in the step S80, working conditions such as various pipeline internal pressures, total vehicle weight and vehicle speed are adopted, a control variable method is utilized to determine that a certain working condition is a main variable, other variable values are changed, a plurality of groups of test pipeline strain and acceleration values are obtained, and each group of test is repeatedly carried out for 3 times, so that accidental factor interference is eliminated.
The further technical scheme is that in the step S90, the fast evaluation criterion of the rolling hazard of the heavy truck is as follows:
when the stress of the pipeline is less than 180MPa, the acceleration of the pipeline is less than 0.05g; the damaged state of the pipeline is free from obvious deformation, and the additional protective measures are omitted;
when the stress of the pipeline is 180-400 MPa, the acceleration of the pipeline is 0.05-0.10 g; the damaged state of the pipeline is elastic deformation, obvious deformation is generated, and the additional protective measures are temporary cover plates of the pavement;
when the stress of the pipeline is 400-510 MPa, the acceleration of the pipeline is 0.10-0.20 g; the damaged state of the pipeline is plastic deformation, irreversible deformation is generated, and an additional protective measure is a cover plate culvert;
when the pipeline stress is more than 510MPa, the pipeline acceleration is more than 0.20g; the damaged state of the pipeline exceeds the ultimate strength, and an additional safeguard measure is to check the pipeline and check the tensile strength and the compressive strength.
The invention has the following beneficial effects:
1. the invention truly simulates the rolling whole process of rolling the buried pipeline of the heavy vehicle and obtains the dynamic response process of rolling the buried pipeline of the vehicle;
2. the method can accurately obtain the actual stress and vibration conditions of the pipeline in the rolling process, obtain the maximum stress and acceleration value of the pipeline in the rolling process, provide a certain field guiding experience for reducing the risk of construction damage of the third party of the oil pipeline, and improve the prevention and control capability of the third party of the oil pipeline;
3. the method has high flexibility and strong applicability, and the applicable test working conditions are rich and changeable, so that the stress and vibration conditions of the heavy truck rolling buried oil pipeline under various working conditions such as different truck weights, vehicle speeds, pipes, pipe diameters, wall thicknesses, buried depths, pipeline internal pressures and the like can be tested;
4. the invention has strong practicability, and each operation step of the test method can be accurately and truly realized through the test system.
Drawings
FIG. 1 is a schematic diagram of a test system for testing stress and vibration of a heavy truck rolling oil pipeline;
FIG. 2 is a schematic illustration of a vehicle travel path in accordance with an embodiment of the present invention;
FIG. 3 is a side cross-sectional view of a test pit in an embodiment of the invention.
The figure shows: the device comprises a power supply device 1, a pipeline pump 2, a high-pressure hose 3, a water injection pipe 4, a water discharge pipe 5, a ball valve 6, a pressure gauge 7, a pressure test pipe 8, a strain gauge 9, an accelerometer 10, an oil pipeline 11, an operation pit 12 and a heavy truck 13.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention discloses a test method for testing stress and vibration of a heavy truck rolling oil pipeline, which comprises the following steps:
step S10, designing a vehicle driving route according to basic parameters of the heavy goods vehicle 13;
the method comprises the following steps: the heavy vehicle driving route is a perpendicular bisector of the pipeline laying direction, and meanwhile, the linear acceleration, uniform speed and deceleration distance of the heavy vehicle are determined, so that the heavy vehicle with a certain load can be safely accelerated to a test speed value, the whole vehicle can uniformly drive over the pipeline, and then the heavy vehicle can be decelerated to a safe speed to drive away from a test site;
step S20, determining the size of the test operation pit 12 according to the width of the trench bottom, the burial depth and the side slope ratio, and excavating the test operation pit 12 according to the size;
the shape of the test operation pit 12 is mainly composed of four types of straight grooves, trapezoid grooves, mixed grooves and stepped grooves, and the shape depends on the soil property of the pipe groove, the ditching mode, the groundwater level, the pipe diameter, the burial depth and the like. The trench size depends on trench bottom width, burial depth and slope ratio, and the depth is calculated at 5m from the inner pipe trench bottom width as follows:
B＝D m +K
wherein: b is the width of the bottom of the ditch, m; dm is the outer diameter of the experimental oil pipeline, m; k is the widening allowance of the trench bottom, m is taken as a value according to a table 1;
TABLE 1 ditch bottom widening margin K value (m)
The slope gradient of the pipe ditch should be determined according to the soil type, the mechanical property and the pipe ditch excavation depth, and the steepest slope gradient of the inner pipe ditch with the depth of less than 5m should be determined according to the table 2;
TABLE 2 steepest slope of inner pipe trench at a depth of 5m or less
S30, selecting a test oil pipeline 11 and installing a stress and vibration test system for testing the rolling compaction oil pipeline of the heavy truck;
3 test pipelines with the length of 8-12m are selected from the pipelines, and then welded end to end, so that the running state of a real long-distance pipeline is simulated, and meanwhile, the influence of the boundary effect of the end seal of the pipeline is weakened; the pipeline is welded according to the requirements of an argon electric continuous welding process, and two ends of the pipeline are sealed through welding elliptical heads; simultaneously, two ends of the upper surface of the pipeline are welded with a prefabricated water injection and drainage port, a pressure test port and a water inlet;
as shown in fig. 1, the stress and vibration test system for the rolling compaction oil pipeline of the heavy truck comprises a test oil pipeline 11, a power supply device 1, a pipeline pump 2, a high-pressure hose 3 and a pressure gauge 7, wherein the left end of the test oil pipeline 11 is provided with a pressure test pipe 8 and a water injection pipe 4, and the right end of the test oil pipeline is provided with a drain pipe 5; the outlet of the pipeline pump 2 is communicated with a water injection pipe 4 through a high-pressure hose 3, and ball valves 6 are arranged on the water injection pipe 4, a drain pipe 5 and a pressure test pipe 8; the power supply device 1 is electrically connected with the pipeline pump 2; the pressure gauge 7 is arranged on the water injection pipe 4
Wherein the ball valve 6 is used for flow regulation; the pipeline pump 2 is used for testing the pipeline full of water of the aviation pipeline, and testing the pipeline pressure and the pressure pump for testing the pressurization; the pressure test tube 8 is used for testing the pressure of the pipeline, when the pressure test is needed, one end of the pressure test tube is connected with the test pipeline through a pressure test port, and the other end of the pressure test tube is connected with the pipeline pump 2 through the high-pressure hose 3; the pressure gauge 7 is used for pressure stabilization monitoring in the pipeline pressure test and test process; the power supply device 1 is used for testing the power supply of the whole process pipeline pump 2;
step S40, placing the test oil pipeline 11 in a test operation pit 12, and testing the pressure of the test oil pipeline 11;
the pipeline is put into a ditch, a cushion layer is stacked at intervals of 5 meters by using soil bags in the excavated operation pit, the height of the cushion layer is 30cm, and then a pipe section is lifted and put into the ditch;
the pipeline pressure test is a hydrostatic test, and the pipeline section is subjected to strength and tightness pressure test. The pressure test is 1.5 times of the design pressure of the aviation oil pipeline, the pressure should be gradually increased, the pressure is sequentially increased according to four stages of 30%, 60%, 90% and 100%, the pressure is stabilized for 10min in each stage, the pressure increasing speed is not more than 0.1MPa/min, the pressure can be continuously increased after no leakage is detected, and the pressure is stabilized for 4h after the pressure is increased to the intensity pressure value. The specific pressure test criteria are shown in table 3:
TABLE 3 pressure value, pressure stabilizing time and qualification criteria for oil pipeline segment hydrostatic test
Step S50, sticking a strain gauge 9 and an accelerometer 10 on a test part of a test oil pipeline 11, and electrically connecting the strain gauge 9 and the accelerometer 10 with a multichannel stress strain dynamic acquisition instrument;
the multichannel stress strain dynamic acquisition instrument comprises multiple channels, each channel is connected with one strain gauge or one accelerometer, and a plurality of instruments can be cascaded according to the actual requirement of the number of test channels, so that the number of acquisition channels is further increased, the structural form is a box type, and the instrument is convenient to carry and place in a test;
step S60, debugging the strain gauge 9, the accelerometer 10 and the multichannel stress strain dynamic acquisition instrument;
step S70, backfilling the test operation pit 12, wherein the backfilling is required to be performed by using excavated soil, the backfilled soil is leveled and compacted with a test site, and meanwhile, the water injection and drainage pipeline is ensured not to be damaged;
s80, pressurizing a pipeline, testing the aviation pipeline 11 by using a heavy truck rolling, and recording strain and acceleration values of the pipeline in the rolling process;
the method comprises the steps of adopting various working conditions such as pipeline internal pressure, total vehicle weight, vehicle speed and the like, determining a certain working condition as a main variable by using a control variable method, changing other variable values to obtain a plurality of groups of test pipeline strain and acceleration values, repeating each group of test for 3 times, and eliminating accidental factor interference;
and step S90, rapidly evaluating the vehicle rolling hazard of the ground navigation pipeline according to the strain and acceleration value burial of the pipeline in the rolling process, wherein the vehicle rolling hazard is specifically shown in the following table 4.
Table 4 quick evaluation table for rolling hazard of third party construction heavy vehicle for buried oil pipeline
Examples
The example provides a test method for testing stress and vibration of a heavy truck rolling oil pipeline, which comprises the following steps:
s10, designing a vehicle driving route, wherein the driving road width of the heavy truck 13 is 4m, the heavy truck 13 drives through the middle of the test operation pit 12, the linear acceleration and steady speed distance is 80m, the deceleration distance is 40m, the heavy truck 13 linearly decelerates to a safe turning speed after driving right above the operation pit 12 at a constant speed, and the heavy truck is driven to a loading and unloading area to change the loading capacity of the vehicle so as to carry out the next set of working condition test.
S20: digging a test operation pit 12, wherein the test operation pit 12 is a trapezoid groove with the length of 26m, the width of 1.8m and the depth of 1.5m as shown in fig. 2 and 3;
s30, as shown in FIG. 2, three test oil pipelines 11 (L360 steel, 273mm in pipe diameter and 8mm in wall thickness) are selected, the middle pipeline is a main pressed pipeline, each test oil pipeline 11 is 8m long and 24m total, the long-distance transportation state of a real long-distance pipeline can be well simulated, and the influence of the boundary effect of sealing at two ends is weakened to a certain extent.
S40, stacking cushion layers with the height of 30cm at intervals of 5 meters by using soil bags in the excavated test operation pit 12, and then lifting the test oil pipeline 11 into a pipe ditch; the water injection pipe 4 is connected with the pipeline pump 2 through the high-pressure hose 3, the power supply device 1 is opened to switch on and off the pipeline pump 2, water is filled into the test avionics pipeline 11, the pipeline pump 2 is closed, ball valves on the water injection pipe 4 and the water drain pipe 5 are closed, the high-pressure hose 3 is respectively connected with the pipeline pump 2 and the pressure test nipple 8 to carry out strength pressure test, the pressure is 1.5 times of the design pressure (namely 15 MPa) of the avionics pipeline, the pipeline pump 2 is opened, the pressure is gradually and slowly increased, the pressure is sequentially increased according to four stages of 30%, 60%, 90% and 100%, the pressure is stabilized for 10min in each stage, the pressure increasing speed is not more than 0.1MPa/min, the pressure can be continuously increased after the pressure is increased to the strength pressure value, the pressure is stabilized for 4h, and the test avionics pipeline 11 is qualified if the test avionics pipeline 11 is free of deformation and leakage; and then, performing tightness pressure test, namely gradually increasing the water pressure in the test oil pipeline 11 to the design pressure (namely 10 MPa), stabilizing the pressure for 24 hours, and if the pressure drop of the test oil pipeline 11 during the stabilizing is not more than 1% of the test pressure value and not more than 0.1MPa, judging that the tightness pressure test is qualified.
S50, sticking a strain gauge 9 and an accelerometer 10 to a test position of a test avionics pipeline 11, axially sticking the strain gauge 9, measuring the axial stress condition of the pipeline, selecting the central section of the middle pipeline at the test position of the example, and sticking 1 strain gauge 9 and 1 accelerometer 10 to the sections of 0 degree, 90 degrees and 180 degrees respectively.
S60, connecting the strain gauges 9 and the accelerometers 10 which are stuck in the step S50 one by one through cable wires and channels of the dynamic stress strain acquisition instrument, and testing whether the acquisition instrument can normally acquire data.
S70, backfilling the test operation pit 12, namely backfilling with excavated soil, wherein the compaction degree is similar to that before excavation, the backfilled soil is smooth and compact and is level with the site, and meanwhile, the water injection and drainage pipeline is prevented from being damaged.
S80, pressurizing the test oil pipeline 11, rolling the pipeline by the heavy truck 13, and recording the strain and acceleration values of the pipeline in the rolling process, wherein after the test oil pipeline 11 is pressurized to 4MPa, the heavy truck 13 with the total load of 30t uniformly drives the whole truck to pass through the test oil pipeline 11 at the speed of 15km/h, and recording the strain and acceleration values from the time of starting to accelerate the heavy truck 13 until the heavy truck 13 is decelerated to a safe turning speed.
And S90, finally, according to the real stress value and the acceleration value of the heavy truck rolling buried oil pipeline measured according to the test method, the identification and the rapid evaluation of the rolling damage of the heavy truck in third party construction during the operation of the buried oil pipeline are realized, and the damaged state of the pipeline and the corresponding additional protective measures are mainly considered.
The present invention is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any person skilled in the art can make some changes or modifications to the equivalent embodiments without departing from the scope of the technical solution of the present invention, but any simple modification, equivalent changes and modifications to the above-mentioned embodiments according to the technical substance of the present invention are still within the scope of the technical solution of the present invention.
Claims (10)
1. The test method for testing stress and vibration of the heavy truck rolling oil pipeline is characterized by comprising the following steps of:
step S10, designing a vehicle driving route according to basic parameters of the test heavy vehicle;
step S20, determining the size of the test operation pit (12) according to the width of the trench bottom, the burial depth and the side slope ratio, and excavating the test operation pit (12) according to the size;
s30, selecting a test oil pipeline (11) and installing a stress and vibration test system for testing the rolling compaction oil pipeline of the heavy truck;
s40, placing the test oil pipeline (11) in a test operation pit (12), and testing the pressure of the test oil pipeline (11);
s50, sticking a strain gauge (9) and an accelerometer (10) on a test part of a test oil pipeline (11), and electrically connecting the strain gauge (9) and the accelerometer (10) with a multichannel stress strain dynamic acquisition instrument;
step S60, debugging a strain gauge (9), an accelerometer (10) and a multichannel stress strain dynamic acquisition instrument;
step S70, backfilling the test operation pit (12);
s80, pressurizing a pipeline, and recording the strain and acceleration value of the pipeline in the rolling process by using a heavy truck to roll a test oil pipeline (11);
and step S90, rapidly evaluating the vehicle rolling hazard of the ground navigation pipeline according to the strain and acceleration value burial of the pipeline in the rolling process.
2. The test method for testing stress and vibration of a heavy truck rolling oil pipeline according to claim 1, wherein the calculation formula of the trench bottom width with a depth within 5m in the step S20 is as follows:
B＝D+K
m
wherein: b is the width of the bottom of the ditch, m; d (D) m The outer diameter m of the pilot oil pipeline is tested; k is the widening allowance of the trench bottom and m.
3. The test method for testing stress and vibration of a heavy truck rolling oil pipeline according to claim 1, wherein the test operation pit (12) is in the shape of four kinds of straight grooves, trapezoid grooves, mixing grooves and stepped grooves.
4. The test method for testing stress and vibration of a heavy truck rolling oil pipeline according to claim 1, wherein the test oil pipeline (11) is formed by welding 3 test pipelines with lengths of 8-12m in a head-tail mode.
5. The test method for testing the stress and vibration of the heavy truck rolling oil pipeline according to claim 4 is characterized in that the test system for testing the stress and vibration of the heavy truck rolling oil pipeline comprises a test oil pipeline (11), a power supply device (1), a pipeline pump (2), a high-pressure hose (3) and a pressure gauge (7), wherein a pressure test pipe (8) and a water injection pipe (4) are arranged at the left end of the test oil pipeline (11), and a drain pipe (5) is arranged at the right end of the test oil pipeline; the outlet of the pipeline pump (2) is communicated with a water injection pipe (4) through a high-pressure hose (3), and ball valves (6) are arranged on the water injection pipe (4), the drain pipe (5) and the pressure test pipe (8); the power supply device (1) is electrically connected with the pipeline pump (2); the pressure gauge (7) is arranged on the water injection pipe (4).
6. The method according to claim 1, wherein in the step S40, in the excavated test operation pit (12), the cushion layers are stacked with soil bags at intervals of 5m, the height is 30cm, and the test oil pipeline (11) is lifted and placed in the test operation pit (12).
7. The test method for testing stress and vibration of a heavy truck rolling oil pipeline according to claim 6, wherein the specific process of testing pressure in step S40 is as follows: the method comprises the steps of opening a switch of a power supply device (1) and a pipeline pump (2), filling water into a test oil pipeline (11), closing the pipeline pump (2), closing ball valves on a water injection pipe (4) and a drain pipe (5), connecting a high-pressure hose (3) with the pipeline pump (2) and a pressure test pipe (8) respectively, performing strength pressure test, wherein the pressure is 1.5 times of the design pressure of the oil pipeline, opening the pipeline pump (2), gradually and gradually increasing the pressure, sequentially increasing the pressure according to four stages of 30%, 60%, 90% and 100%, stabilizing the pressure for 10min at each stage, keeping the pressure increasing speed not greater than 0.1MPa/min, continuously increasing the pressure after the pressure is increased to a strength pressure value through inspection, stabilizing the pressure for 4 hours, and judging the strength pressure test if the test oil pipeline (11) is free of deformation and leakage; and then, performing tightness pressure test, namely gradually increasing the water pressure in the test oil pipeline (11) to the design pressure, stabilizing the pressure for 24 hours, and if the pressure drop of the test oil pipeline (11) is not more than 1% of the test pressure value and not more than 0.1MPa in the stabilizing period, judging the tightness pressure test.
8. The test method for testing stress and vibration of a heavy truck rolling oil pipeline according to claim 1, wherein the backfilling in the step S70 requires backfilling with excavated soil, the backfill soil should be flat and compact, and be leveled with a test site, and meanwhile, the water injection and drainage pipeline is ensured not to be damaged.
9. The test method for testing stress and vibration of a heavy truck rolling navigation pipeline according to claim 1, wherein in the step S80, various working conditions such as pipeline internal pressure, total vehicle weight and speed are adopted, a control variable method is utilized to determine a certain working condition as a main variable, other variable values are changed, a plurality of groups of test pipeline strain and acceleration values are obtained, each group of test is repeated for 3 times, and accidental factor interference is eliminated.
10. The test method for testing stress and vibration of heavy truck rolling navigation oil pipeline according to claim 1, wherein the fast evaluation criteria of heavy truck rolling hazard in step S90 are:
when the stress of the pipeline is less than 180MPa, the acceleration of the pipeline is less than 0.05g; the damaged state of the pipeline is free from obvious deformation, and the additional protective measures are omitted;
when the stress of the pipeline is 180-400 MPa, the acceleration of the pipeline is 0.05-0.10 g; the damaged state of the pipeline is elastic deformation, obvious deformation is generated, and the additional protective measures are temporary cover plates of the pavement;
when the stress of the pipeline is 400-510 MPa, the acceleration of the pipeline is 0.10-0.20 g; the damaged state of the pipeline is plastic deformation, irreversible deformation is generated, and an additional protective measure is a cover plate culvert;
when the pipeline stress is more than 510MPa, the pipeline acceleration is more than 0.20g; the damaged state of the pipeline exceeds the ultimate strength, and an additional safeguard measure is to check the pipeline and check the tensile strength and the compressive strength.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118310874A (en) * | 2024-04-16 | 2024-07-09 | 安徽省特种设备检测院 | System for analyzing stress of gas pipeline in urban area with defects in rolling of vehicle and experimental method |
| CN118777096A (en) * | 2024-09-11 | 2024-10-15 | 唐山兴邦管道工程设备有限公司 | Device and method for testing extrusion stress bearing of direct-buried heat-insulation pipeline joint |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2467299C1 (en) * | 2011-05-12 | 2012-11-20 | Дочернее Открытое Акционерное Общество (ДОАО) "Оргэнергогаз" ОАО "Газпром" | Method of hydraulic impact test and rehabilitation of pipeline, which is implemented during its increased pressure loading in field conditions |
| CN114235821A (en) * | 2021-12-24 | 2022-03-25 | 广州中科智巡科技有限公司 | Intelligent early warning method and system for preventing external damage of long-distance oil transportation pipeline |
| CN114777634A (en) * | 2022-04-06 | 2022-07-22 | 中国石油化工股份有限公司 | System and method for testing stress of buried pipeline under vehicle load |
-
2022
- 2022-12-15 CN CN202211614549.0A patent/CN116026543B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2467299C1 (en) * | 2011-05-12 | 2012-11-20 | Дочернее Открытое Акционерное Общество (ДОАО) "Оргэнергогаз" ОАО "Газпром" | Method of hydraulic impact test and rehabilitation of pipeline, which is implemented during its increased pressure loading in field conditions |
| CN114235821A (en) * | 2021-12-24 | 2022-03-25 | 广州中科智巡科技有限公司 | Intelligent early warning method and system for preventing external damage of long-distance oil transportation pipeline |
| CN114777634A (en) * | 2022-04-06 | 2022-07-22 | 中国石油化工股份有限公司 | System and method for testing stress of buried pipeline under vehicle load |
Non-Patent Citations (1)
| Title |
|---|
| 朱伟林;王涛;: "航煤管道水击分析及保护措施", 管道技术与设备, no. 04, 15 July 2020 (2020-07-15) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118310874A (en) * | 2024-04-16 | 2024-07-09 | 安徽省特种设备检测院 | System for analyzing stress of gas pipeline in urban area with defects in rolling of vehicle and experimental method |
| CN118777096A (en) * | 2024-09-11 | 2024-10-15 | 唐山兴邦管道工程设备有限公司 | Device and method for testing extrusion stress bearing of direct-buried heat-insulation pipeline joint |
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