CN112924269A - Method and test device for simulating third-party damage to large-caliber high-pressure pipeline - Google Patents
Method and test device for simulating third-party damage to large-caliber high-pressure pipeline Download PDFInfo
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Abstract
The invention relates to the technical field of a method and a device for simulating the third-party damage of a high-pressure pipeline, in particular to a method and a test device for simulating the third-party damage of a large-caliber high-pressure pipeline, wherein the test device comprises a strong impact load applying assembly, a data acquisition device, a pressurizing device, a power supply device and a seismic wave sensor. The method and the testing device provide a strong impact load action mode for a large-size pipeline strong impact load test, carry out the strong impact load test on the high-pressure pipeline, acquire seismic wave, strain and jet impact force data in the strong impact load environment, sample the high-pressure pipeline subjected to the strong impact load test to carry out pipeline fracture metallographic analysis, and provide a data basis for the strong impact load operation near the pipeline.
Description
Technical Field
The invention relates to the technical field of a method and a device for simulating a high-pressure pipeline damaged by a third party, in particular to a method and a device for simulating a large-diameter high-pressure pipeline damaged by the third party, and particularly relates to the method and the device for simulating the high-pressure natural gas pipeline damaged by the third party.
Background
The large-caliber high-pressure pipeline is taken as the most important transportation way of natural gas, and the safety of the large-caliber high-pressure pipeline is always paid attention. In the running process of the pipeline, the mechanical property of the pipeline is possibly changed, and the pipeline is seriously cracked or even broken due to the external strong impact load action such as damage caused by construction damage of a third party, so that large-scale leakage is generated. Because the main component of natural gas is methane, the density is low, the natural gas is easy to diffuse, once the natural gas leaks into the air, explosive mixed gas is easy to form and expands in the atmosphere to form large-area combustible gas cloud, large-scale steam cloud explosion can be generated after the natural gas meets open fire, and the explosion can cause large-scale personnel injury and serious damage to the surrounding environment. However, when the pipeline is damaged and not leaked immediately, how to evaluate the damage degree of the pipeline and whether the pipeline can run safely; when a pipeline is damaged and leaks, how to evaluate the damage form and degree formed after the leakage does not have a complete test and evaluation system at present. Therefore, the research on the load action mode of the pipeline damaged by external strong impact, the mechanical response parameters of the pipeline and the consequence parameters of the damaged pipeline has important significance for the safe operation of the pipeline, and also has important academic value and application value for establishing a third-party construction damage evaluation model and a pipeline safety and failure damage effect evaluation method.
The utility model discloses a test system for simulating the influence of terrorist attack ground explosion on a gas pipeline (patent application number: 201822150357.4), which discloses a test system for simulating the influence of terrorist attack ground explosion on a gas pipeline and provides a test method for the vibration speed, the strain and the displacement of a measuring point of a pipeline when an explosive soil isolation layer acts on the pipeline.
Disclosure of Invention
The invention provides a method and a test device for simulating a large-diameter high-pressure pipeline damaged by a third party, which overcome the defects of the prior art, can be used for carrying out strong impact load test on the high-pressure pipeline, acquiring seismic wave, strain and jet impact force data in a strong impact load environment, and sampling the high-pressure pipeline subjected to the strong impact load test to carry out metallographic analysis on a pipeline fracture.
One of the technical schemes of the invention is realized by the following measures: a method for simulating a large-caliber high-pressure pipeline damaged by a third party is carried out according to the following method: fixing a high-pressure pipeline to be tested in a safety pit, fixedly installing a strain gauge and a pressure sensor on the high-pressure pipeline respectively, placing a seismic wave sensor at a test position near the high-pressure pipeline, then connecting signal output ends of the seismic wave sensor, the strain gauge and the pressure sensor with a signal input end of a data acquisition device respectively, backfilling soil in the safety pit and tamping, injecting gas into the high-pressure pipeline to required pressure by using a pressurizing device, applying strong impact load to the high-pressure pipeline when the high-pressure pipeline is pressurized, acquiring data by the seismic wave sensor and the strain gauge respectively in a strong impact load environment, and transmitting seismic wave signals acquired by the seismic wave sensor and strain signals acquired by the strain gauge to the data acquisition device.
The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:
above-mentioned when the jet impact force data of high pressure line in strong impact load environment is acquireed to needs, carry out the jet impact force test: the method comprises the steps of installing rupture discs with different pressures and calibers at required positions of a high-pressure pipeline, fixing an impact force sensor at the relative position of the rupture discs on the high-pressure pipeline, applying strong impact load to the high-pressure pipeline, collecting jet impact force data by the impact force sensor in a strong impact load environment, and transmitting the jet impact force data to a data collection device.
After the seismic wave, strain and jet impact force data of the high-pressure pipeline under the action of the strong impact load are acquired, the high-pressure pipeline is sampled in a flame cutting mode so as to collect the metallographic phase of the fracture of the pipeline.
The mode of applying the strong impact load is an explosive explosion mode, and the explosive explosion mode is as follows: placing the explosive and the detonator to a position needing to be detonated, connecting the detonator with a detonation controller, carrying out remote detonation through the detonation controller, and acquiring required data after the explosive is detonated; or the mode of applying the strong impact load is a digging machine impact mode, and the digging machine impact mode is as follows: a breaking hammer or a bucket of the excavator is adopted to impact the high-pressure pipeline, and required data are collected in the process of impacting the excavator.
The second technical scheme of the invention is realized by the following measures: a test device for implementing a method for simulating that a large-diameter high-pressure pipeline is damaged by a third party comprises a strong impact load applying assembly, a data acquisition device, a pressurizing device, a power supply device and a seismic wave sensor, wherein a strain gauge is fixedly arranged at a test position of the high-pressure pipeline, a pressure sensor is fixedly arranged on the high-pressure pipeline, signal output ends of the strain gauge, the pressure sensor and the seismic wave sensor are respectively connected with a signal input end of the data acquisition device, the pressurizing device is communicated with the inside of the high-pressure pipeline, and the data acquisition device and the pressurizing device are respectively connected with the power supply device.
The following is further optimization or/and improvement of the second technical scheme of the invention:
the high impact load applying assembly adopts an explosive explosion assembly, the explosive explosion assembly comprises an explosion controller, a synchronous trigger and an explosive, a detonator of the explosive is connected with the explosion controller, the explosion controller is connected with the synchronous trigger, and the synchronous trigger is connected with a data acquisition device.
The strong impact load applying assembly adopts a digging machine impact assembly, and the digging machine impact assembly adopts a digging machine breaking hammer or a digging machine bucket which applies impact load to the high-pressure pipeline.
The data acquisition device adopts a data acquisition instrument, and a charge amplifier is connected between the impact force sensor and the data acquisition instrument.
The power supply device comprises a generator set and a stabilized voltage power supply, wherein the generator set is connected with the stabilized voltage power supply, and the output end of the stabilized voltage power supply is respectively connected with the power access ends of the detonation controller, the synchronous trigger, the charge amplifier and the data acquisition instrument.
The pressurizing device comprises a gas injection vehicle, a gas injection pipeline and a gas exhaust pipeline, wherein the gas injection vehicle is communicated with the interior of the high-pressure pipeline through the gas injection pipeline, the gas exhaust pipeline is communicated with the interior of the high-pressure pipeline, and a vent valve is arranged on the gas exhaust pipeline; still include the fixed assembly of pipeline, the fixed assembly of pipeline adopts the concrete pier.
The method and the testing device provide a strong impact load action mode for a large-size pipeline strong impact load test, carry out the strong impact load test on the high-pressure pipeline, acquire seismic wave, strain and jet impact force data in the strong impact load environment, sample the high-pressure pipeline subjected to the strong impact load test to carry out pipeline fracture metallographic analysis, and provide a data basis for the strong impact load operation near the pipeline.
Drawings
FIG. 1 is a schematic top view of example 6 of the present invention.
FIG. 2 is a schematic view of a pretreated high pressure pipe before a strain gauge is attached to the high pressure pipe.
FIG. 3 is an enlarged schematic view of the method of explosive action.
Figure 4 is a schematic diagram of the excavator action method.
FIG. 5 is a schematic view of a port metallographic sample collection method.
FIG. 6 is a graph showing strain time course.
FIG. 7 is a graph showing the pressure time course.
The codes in the figures are respectively: the device comprises a high-pressure pipeline 1, a concrete pier 2, a safety pit 3, an excavator 4, a charge amplifier 5, an air injection vehicle 6, an air injection pipeline 7, an exhaust pipeline 8, an impact force sensor 9, an air release valve 10, a generator set 11, a voltage-stabilized power supply 12, a seismic wave sensor 13, an explosion-proof test room 14, an explosion-proof controller 15, a synchronous trigger 16, a data acquisition instrument 17, a signal trigger line 18, an explosion line 19, a detonator 21, an explosive 22, an explosion-proof data acquisition room 23, a shielding cable 24, a notebook computer 25, a pressure sensor 26, a strain gauge 26, a rupture gauge 27, an excavator breaking hammer 28, a power supply cable 29, a signal data line 30 and a cutting part 31.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of fig. 1 of the specification.
The test devices and materials used in the examples were all commercially available unless otherwise specified.
The invention is further described below with reference to the following examples:
example 1: as shown in fig. 1 to 4, the method for simulating the third party damage of the large-caliber high-pressure pipeline 1 is carried out as follows: fixing a high-pressure pipeline 1 to be tested in a safety pit 3, respectively and fixedly installing a strain gauge 26 and a pressure sensor 25 on the high-pressure pipeline 1, placing a seismic wave sensor 13 at a testing position near the high-pressure pipeline 1, then respectively connecting signal output ends of the seismic wave sensor 13, the strain gauge 26 and the pressure sensor 25 with a signal input end of a data acquisition device, backfilling soil of the safety pit 3 and tamping, injecting gas into the high-pressure pipeline 1 to required pressure by using a pressurizing device, applying strong impact load to the high-pressure pipeline 1 after the high-pressure pipeline 1 is pressurized, respectively acquiring data by the seismic wave sensor 13 and the strain gauge 26 in a strong impact load environment, and transmitting seismic wave signals acquired by the seismic wave sensor 13 and strain signals acquired by the strain gauge 26 to the data acquisition device.
The pressure sensor 25 is installed on the high pressure pipe 1 to detect whether the internal gas leakage occurs in the high pressure pipe 1 and to acquire the internal pressure data of the high pressure pipe 1 during the pressurizing process.
Example 2: according to the method for simulating the third-party damage to the large-caliber high-pressure pipeline 1, when jet impact force data of the high-pressure pipeline 1 in a strong impact load environment needs to be acquired, a jet impact force test is carried out: the rupture discs 27 with different pressures and calibers are installed at the required positions of the high-pressure pipeline 1 according to requirements, the impact force sensor 9 is fixed at the relative position of the rupture discs 27 on the high-pressure pipeline 1, then a strong impact load is applied to the high-pressure pipeline 1, and in a strong impact load environment, the impact force sensor 9 collects jet impact force data and transmits the jet impact force data to the data acquisition device.
Example 3: as the optimization of the above embodiment, after the acquisition of seismic wave, strain and jet impact force data of the high-pressure pipeline 1 under the action of a strong impact load is completed, the high-pressure pipeline 1 is sampled in a flame cutting manner so as to perform the metallographic acquisition of the fracture of the pipeline.
The method can test the high-pressure pipeline 1 for the strong impact load, acquire seismic wave, strain and jet impact force data in the strong impact load environment, sample the high-pressure pipeline 1 subjected to the strong impact load test to perform pipeline fracture metallographic analysis, and provide data basis for the strong impact load operation near the pipeline.
Example 4: as an optimization of the above embodiment, the method of applying a strong impact load is the explosive 21 explosion method, and the explosive 21 explosion method is as follows: the detonator 21 and the detonator 20 are placed at a position needing to be detonated, the detonator 20 is connected with the initiation controller 15 through the initiation wire 19, remote initiation is carried out through the initiation controller 15, and required data are acquired after the detonator 21 is exploded.
Example 5: unlike example 4, the method of applying a strong impact load was the excavator 4 impact method, and the excavator 4 impact method was: the high-pressure pipeline 1 is impacted by adopting a digging machine breaking hammer 28 or a digging machine 4 bucket, and required data are collected in the impacting process of the digging machine 4.
Example 6: as shown in fig. 1 to 4, the test device for simulating the method of the large-diameter high-pressure pipeline 1 damaged by the third party in the above embodiment includes a strong impact load applying assembly, a data collecting device, a pressurizing device, a power supply device, and a seismic wave sensor 13, wherein a strain gauge 26 is fixedly installed at a test position of the high-pressure pipeline 1, a pressure sensor 25 is fixedly installed on the high-pressure pipeline 1, signal output ends of the strain gauge 26, the pressure sensor 25, and the seismic wave sensor 13 are respectively connected with a signal input end of the data collecting device, the pressurizing device is communicated with the inside of the high-pressure pipeline 1, and the data collecting device and the pressurizing device are respectively connected with the power supply device.
The following are further optimizations or/and improvements to the above described test device:
as shown in the attached figure 1, the high impact load application assembly adopts an explosive explosion assembly, the explosive explosion assembly comprises an initiation controller 15, a synchronous trigger 16 and an explosive 21, a detonator 20 of the explosive 21 is connected with the initiation controller through an initiation line 19, the initiation controller 15 is connected with the synchronous trigger 16 through a signal trigger line 18, and the synchronous trigger 16 is connected with a data acquisition device.
As shown in fig. 4, the strong impact load applying assembly employs a shovel impact assembly employing a shovel breaker 28 or a shovel 4 bucket applying an impact load to the high pressure pipe 1.
The invention can provide two strong impact load acting modes.
According to the requirement, the data acquisition device adopts a data acquisition instrument 17, and a charge amplifier 5 is connected between the impact force sensor 9 and the data acquisition instrument 17.
As shown in fig. 1, the power supply device includes a generator set 11 and a regulated power supply 12, the generator set 11 is connected with the regulated power supply 12, and an output end of the regulated power supply 12 is connected with power supply access ends of an initiation controller 15, a synchronous trigger 16, a charge amplifier 5 and a data acquisition instrument 17 respectively.
As shown in fig. 1, the pressurizing device comprises a gas injection vehicle 6, a gas injection pipeline 7 and a gas exhaust pipeline 8, wherein the gas injection vehicle 6 is communicated with the inside of the high-pressure pipeline 1 through the gas injection pipeline 7, the gas exhaust pipeline 8 is communicated with the inside of the high-pressure pipeline 1, and a vent valve 10 is arranged on the gas exhaust pipeline 8; still include the fixed assembly of pipeline, the fixed assembly of pipeline adopts concrete pier 2. The high-pressure pipeline 1 is fixed through a pipeline fixing assembly. The high-pressure pipe 1 may comprise a 3PE corrosion protection layer.
In the implementation process of the method for simulating the large-caliber high-pressure pipeline 1 damaged by the third party in the embodiment, the safety pit 3, the strain gauge 26 and the like are specifically as follows:
safety pit used for test 3:
the size of the safety pit 3 is related to the sizes of the high-pressure pipeline 1 and the concrete pier 2 in the test, the shape of the safety pit 3 is a cuboid, wherein the length of the safety pit 3 is two meters on the basis of the sum of the length of the high-pressure pipeline 1 and the length of the double-time concrete pier 2, so that the construction operation of a crane is facilitated, the width of the safety pit 3 is one meter on the basis of taking the concrete pier 2 as a reference, so that the strain gauge 26 can be conveniently pasted, and the height of the safety pit 3 is based on the height of the concrete pier 2. After the excavator 4 digs the safety pit 3, the concrete pier 2 and the high-pressure pipeline 1 are sequentially placed into the safety pit 3 by using a crane, and the relative position of the pipeline and the concrete pier 2 is adjusted in the process so that the contact surface between the pipeline and the concrete pier 2 can be maximized.
Method for attaching strain gauge 26:
when the strain gauge 26 is adhered to the high-pressure pipeline 1, the high-pressure pipeline 1 is pretreated as shown in fig. 2, a position where the strain gauge 26 needs to be adhered is measured on the high-pressure pipeline 1 by using a tape measure, a paint pen is used for marking the position, the PE anticorrosive layer at the marked position 3 on the surface of the high-pressure pipeline 1 is cut and removed by using a cutting function of a polishing machine, and then a round and smooth surface is polished at the position by using a polishing function of the polishing machine.
When the strain gauge 26 is adhered, the alcohol cotton sheet is firstly used for wiping the strain gauge 26, then the strong glue is used for adhering the strain gauge 26 to the high-voltage pipeline 1, electric iron is used for welding between the tail end of the strain gauge 26 and the shielding cable 23, the insulating tape is used for insulating, the other end of the shielding cable 23 is connected with the input end of the data acquisition instrument 17, and meanwhile, the insulating tape and the paint pen are used for numbering the two ends of each shielding cable 23 so as to prevent the wrong connection at the joint. The remaining strain gauge 26 is attached in the same manner as the first strain gauge 26, and after the attachment is completed, the shielded cable 23 and the attached strain gauge 26 are fixed to the high-voltage pipe 1 using an insulating tape.
The pressure sensor 25:
the pressure sensor 25 is installed on a preset sensor hole of the high-pressure pipeline 1, is connected with the input end of a data acquisition instrument 17 in an explosion-proof data acquisition room 22 which is arranged behind the shelter and is 1120 meters away from the high-pressure pipeline through a shielding cable 23, the output end of the data acquisition instrument 17 is connected with a network port of a notebook computer 24 through a network cable, and the measured gas pressure in the high-pressure pipeline 1 is displayed in real time through a display of the notebook computer 24. The pressure change during the charging of the high-pressure pipe 1 can be seen in fig. 7.
The seismic wave sensor 13:
when seismic wave acquisition preparation near the high-pressure pipeline 1 is carried out, the positions of 1 meter, 2 meters and 4 meters away from the high-pressure pipeline 1 to be tested are determined by using a measuring tape, the seismic wave sensors 13 are placed at the positions, meanwhile, the signal data wire 30 (Q9 copper core shielded cable 23) is connected, and the other end of the signal data wire 30 is connected with the input end of the data acquisition instrument 17.
The impact force sensor 9:
when the pipeline jet impact force is collected, the rupture discs 27 with different pressures and calibers are sequentially installed at the reserved positions of the pipeline according to the experimental requirements, the impact force sensor 9 determines the relative position of the rupture discs 27 on the high-pressure pipeline 1 through a measuring tape, the impact force sensor is connected with the input end of a charge amplifier 5 arranged in an explosion-proof data collection room 22 through a signal data line 30, and the output end of the charge amplifier 5 is connected with the input end of a data collection instrument 17 through the signal data line 30. The jet impact force test is separated from other tests, and in other tests, the preformed hole of the rupture disc 27 is plugged by using a plug.
Stamping the high-pressure pipeline 1:
when the high-pressure pipeline 1 is pressurized, the gas injection vehicle 6 is connected with a gas injection valve on the high-pressure pipeline 1 through a gas injection pipeline 7 outside the safety pit 3310 m, the gas injection valve has the function of closing the valve to keep the internal pressure of the pipeline after the high-pressure pipeline 1 is completely inflated, and meanwhile, the gas injection vehicle 6 is driven out of a test field and is at least far away from the safety pit 33100 m. After the test is finished, the air release valve 10 which plays a safety role safely discharges the gas in the high-pressure pipeline 1 through the exhaust pipeline 8. Before the pipeline starts to be pressurized, whether the preparation of other detection devices is finished or not is checked, meanwhile, the detection devices are subjected to pre-test, after all the settings are finished, warning lines are set on the site, and after other people except the pressurizing staff are completely evacuated, the site starts to be pressurized.
The explosive 21 applies an impact:
the detonation controller 15 is connected with the input end of a synchronous trigger 16 of the explosion-proof data acquisition room 22 through a signal trigger line 18, the output end of the synchronous trigger 16 is connected with the input end of a data acquisition instrument 17 through the signal trigger line 18, and when an experiment involving explosives 21 is carried out, the detonation controller 15 of the explosion-proof test room 14 controls the data acquisition instrument 17 of the explosion-proof data acquisition room 22 to acquire data.
When the explosive 21 acts on the high-pressure pipeline 1, as shown in fig. 3, the explosive 21 is tightly attached to the side surface of the high-pressure pipeline 1, and the explosive 21 is tightly attached to the right upper side of the high-pressure pipeline 1 for explosion, or a soil layer with a required thickness is arranged between the explosive 21 and the high-pressure pipeline 1 for explosion, and only one explosive 21 can be used in each explosive 21 test.
When the high-voltage pipeline 1 is pressurized, the detonator 20 is fixedly connected with the explosive 21 through the transparent adhesive tape, the detonator wire is connected with the detonating cord 19, and the detonating cord 19 is connected to the output end of the detonating controller 15 of the explosion-proof test chamber 14. When the explosive 21 is used, no other personnel except the staff on the site is kept, and remote detonation is carried out by controlling the detonation controller 15. After the explosive 21 explodes each time, high-pressure gas in the high-pressure pipeline 1 should be firstly discharged through the discharge valve 10, then personnel are arranged to arrange test data for storage, meanwhile, on-site collection facilities are checked, if damaged, the facilities should be replaced in time, after the facilities are ensured to be intact, the personnel withdraw from the site, then the high-pressure pipeline 1 is inflated, and the next explosive 21 experiment is carried out. When a soil layer is arranged between the explosive 21 and the high-pressure pipeline 1, welding the 0 scale of the marker post at the specific position of the high-pressure pipeline 1, determining the thickness of the soil layer according to the scale of the marker post, and determining the relative position of the explosive 21 and the high-pressure pipeline 1 according to the relative position of the marker post and the explosive 21. After detonation of the charge 21, the strain data collected may be as shown in figure 6.
The excavator 4 applies an impact:
when the excavator 4 acts, the acting position of the excavator 4 on the high-pressure pipeline 1 is determined through the tape measure, an obvious position is marked by using a paint pen, the front window glass of the excavator 4 needs to be provided with a safety net, and meanwhile, the glass needs to be thickened glass. In a specific test, as shown in fig. 4, an off-site timing person stands 20 meters out of the safety pit 3, both the excavator 4 worker and the off-site timing person should wear safety helmets and wear protective clothing, the off-site timing person determines the working time of the excavator 4 through a timer, and the excavator 4 worker is instructed to control the excavator 4 to work through a signal flag.
And (3) metallographic sampling of a pipeline fracture:
when the tests are completely finished, metallographic collection and analysis are needed to be carried out on a pipeline fracture caused in the test process, but the caliber of the high-pressure pipeline 1 is large, and the wire cutting equipment cannot reach the site, so that the flame cutting equipment is firstly used for roughly cutting the high-pressure pipeline 1, a measuring tape and a paint pen are used for drawing a large mark on a part of the high-pressure pipeline 1, which needs fracture metallographic analysis, needing rough cutting, so that flame cutting cannot affect the metallographic phase of the fracture needing to be detected, after the flame cutting equipment carries out rough cutting on the pipeline (the cutting part 31 is shown in figure 5), the paint pen is used for numbering and arranging the cut pipeline samples, then the pipeline samples are transported to the wire cutting equipment, the samples are finely cut, and finally the metallographic detection is carried out on the samples by processing and using the metallographic analysis equipment.
The generator set 11 is arranged 170 meters away from the high-voltage pipeline, the stabilized voltage power supply 12 is arranged in the explosion-proof data acquisition room 22 which is 150 meters away from the high-voltage pipeline and provided with the steel plate protection wall, the output end of the generator set 11 is connected with the input end of the stabilized voltage power supply 12 through a power supply cable 29, and the output end of the stabilized voltage power supply 12 is connected with other power supply ends needing power equipment through patch boards with different lengths.
The method and the testing device provide a strong impact load action mode for a large-size pipeline strong impact load test, carry out the strong impact load test on the high-pressure pipeline 1, obtain seismic wave, strain and jet impact force data in the strong impact load environment, sample the high-pressure pipeline 1 subjected to the strong impact load test to carry out pipeline fracture metallographic analysis, and provide a data basis for the strong impact load operation near the pipeline.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (10)
1. A method for simulating the third party damage of a large-caliber high-pressure pipeline is characterized by comprising the following steps: fixing a high-pressure pipeline to be tested in a safety pit, fixedly installing a strain gauge and a pressure sensor on the high-pressure pipeline respectively, placing a seismic wave sensor at a test position near the high-pressure pipeline, then connecting signal output ends of the seismic wave sensor, the strain gauge and the pressure sensor with a signal input end of a data acquisition device respectively, backfilling soil in the safety pit and tamping, injecting gas into the high-pressure pipeline to required pressure by using a pressurizing device, applying strong impact load to the high-pressure pipeline when the high-pressure pipeline is pressurized, acquiring data by the seismic wave sensor and the strain gauge respectively in a strong impact load environment, and transmitting seismic wave signals acquired by the seismic wave sensor and strain signals acquired by the strain gauge to the data acquisition device.
2. The method for simulating the third-party damage to the large-caliber high-pressure pipeline according to claim 1, wherein when jet impact force data of the high-pressure pipeline in a strong impact load environment needs to be acquired, a jet impact force test is performed: the method comprises the steps of installing rupture discs with different pressures and calibers at required positions of a high-pressure pipeline, fixing an impact force sensor at the relative position of the rupture discs on the high-pressure pipeline, applying strong impact load to the high-pressure pipeline, collecting jet impact force data by the impact force sensor in a strong impact load environment, and transmitting the jet impact force data to a data collection device.
3. The method for simulating the third-party damage to the large-caliber high-pressure pipeline according to claim 1 or 2, wherein after the acquisition of seismic wave, strain and jet impact force data of the high-pressure pipeline under the action of the strong impact load is completed, the high-pressure pipeline is sampled in a flame cutting mode so as to collect the metallographic phase of a pipeline fracture.
4. The method for simulating the third-party damage to the large-caliber high-pressure pipeline according to claim 1, 2 or 3, wherein the mode of applying the strong impact load is an explosive explosion mode, and the explosive explosion mode is as follows: placing the explosive and the detonator to a position needing to be detonated, connecting the detonator with a detonation controller, carrying out remote detonation through the detonation controller, and acquiring required data after the explosive is detonated; or the mode of applying the strong impact load is a digging machine impact mode, and the digging machine impact mode is as follows: a breaking hammer or a bucket of the excavator is adopted to impact the high-pressure pipeline, and required data are collected in the process of impacting the excavator.
5. A test device for implementing the method for simulating the third party damage to the large-caliber high-pressure pipeline according to any one of claims 1 to 4, which is characterized by comprising a strong impact load applying assembly, a data acquisition device, a pressurizing device, a power supply device and a seismic wave sensor, wherein a strain gauge is fixedly arranged at the testing position of the high-pressure pipeline, a pressure sensor is fixedly arranged on the high-pressure pipeline, the signal output ends of the strain gauge, the pressure sensor and the seismic wave sensor are respectively connected with the signal input end of the data acquisition device, the pressurizing device is communicated with the inside of the high-pressure pipeline, and the data acquisition device and the pressurizing device are respectively connected with the power supply device.
6. The test device according to claim 5, wherein the strong impact load application assembly is an explosive explosion assembly, the explosive explosion assembly comprises an explosion controller, a synchronous trigger and an explosive, a detonator of the explosive is connected with the explosion controller, the explosion controller is connected with the synchronous trigger, and the synchronous trigger is connected with the data acquisition device; alternatively, the strong impact load applying assembly is a shovel impact assembly, and the shovel impact assembly is a shovel breaking hammer or a shovel bucket applying impact load to the high-pressure pipeline.
7. The test device according to claim 5 or 6, wherein the data acquisition device is a data acquisition instrument, and a charge amplifier is connected between the impact force sensor and the data acquisition instrument.
8. The test device of claim 6, wherein the power supply device comprises a generator set and a stabilized voltage power supply, the generator set is connected with the stabilized voltage power supply, and the output end of the stabilized voltage power supply is respectively connected with the power supply access ends of the detonation controller, the synchronous trigger, the charge amplifier and the data acquisition instrument.
9. The test device according to claim 5, 6 or 8, wherein the pressurizing device comprises a gas injection vehicle, a gas injection pipeline and a gas exhaust pipeline, the gas injection vehicle is communicated with the interior of the high-pressure pipeline through the gas injection pipeline, the gas exhaust pipeline is communicated with the interior of the high-pressure pipeline, and a vent valve is arranged on the gas exhaust pipeline; or/and the pipeline fixing assembly is a concrete pier.
10. The test device according to claim 7, wherein the pressurizing device comprises a gas injection vehicle, a gas injection pipeline and a gas exhaust pipeline, the gas injection vehicle is communicated with the interior of the high-pressure pipeline through the gas injection pipeline, the gas exhaust pipeline is communicated with the interior of the high-pressure pipeline, and a vent valve is arranged on the gas exhaust pipeline; or/and the pipeline fixing assembly is a concrete pier.
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