CN112902822A - Strain testing method and device for large-scale high-pressure pipeline under explosive impact - Google Patents
Strain testing method and device for large-scale high-pressure pipeline under explosive impact Download PDFInfo
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- 238000004880 explosion Methods 0.000 claims abstract description 33
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- 230000005489 elastic deformation Effects 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims 3
- 238000005422 blasting Methods 0.000 abstract description 4
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- 230000000977 initiatory effect Effects 0.000 description 8
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
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Abstract
The invention relates to the technical field of a high-pressure pipeline strain test method and a test device, in particular to a strain test method and a test device when a large-scale high-pressure pipeline is impacted by explosion. The strain testing method and the testing device can perform the strain test of explosive explosion impact by the mutual matching of the pipeline fixing assembly, the detonation control assembly, the synchronous trigger device, the data acquisition device, the pressurizing device and the like, and the strain testing device can test the deformation of the surface of the pipeline caused by the impact action of TNT explosives with different doses and different explosion distances to obtain the strain change data of different positions of the pipeline, thereby providing a mode and a method for detecting the strain data and the change rule of the pipeline in the explosion environment and providing a data basis for the blasting operation near the pipeline.
Description
Technical Field
The invention relates to the technical field of a high-pressure pipeline strain testing method and a testing device, in particular to a strain testing method and a testing device when a large-scale high-pressure pipeline is impacted by explosion.
Background
As one of the important transportation routes of natural gas and oil, the safety of pipelines has been regarded as important. It may be subjected to blast construction to subject the pipe to an explosive blast. When the pipeline is impacted by explosive explosion, plastic deformation and even rupture can occur, further explosion accidents can occur, and casualties and property loss are caused. Therefore, there is a need for strain testing of pipelines when they are subjected to explosive impacts. The damage degree of different explosive quantities to the pipeline can be obtained through a strain test, so that the blasting construction near the pipeline is referred.
In terms of strain testing, existing testing techniques include primarily steel tape gauge measurements, local strain sensor measurements, and ultrasonic measurements. The steel tape ruler measurement method is to measure the circumference of the pipeline by using a steel tape ruler and calculate strain; local strain sensor measurement refers to the detection of strain in a pipe using strain sensors placed on the surface of the pipe; ultrasonic measurement refers to the calculation of the circumferential strain of a pipe using the propagation of ultrasonic signals at the surface of the pipe. The strain testing methods can be conveniently used in the detection and maintenance of the pipeline, but when the pipeline is influenced by explosive explosion impact, the strain change of the pipeline cannot be effectively measured by the strain testing methods.
At present, no technical scheme capable of testing large-scale high-pressure pipeline strain change under the impact of explosive explosion exists.
Disclosure of Invention
The invention provides a strain testing method and a strain testing device for a large-scale high-pressure pipeline impacted by explosion, overcomes the defects of the prior art, and can effectively solve the problem that the prior pipeline strain testing technology cannot be applied to the strain testing of explosive impact.
One of the technical schemes of the invention is realized by the following measures: a strain testing method for a large-scale high-pressure pipeline under explosion impact is carried out according to the following steps: fixing the high-pressure pipeline to be tested in the safety pit through a pipeline fixing assembly, respectively fixedly installing the strain gauge and the pressure sensor on the high-pressure pipeline, then the signal output ends of the strain gauge and the pressure sensor are connected with the signal input end of the data acquisition device, after the connection is finished, the soil of the safety pit is backfilled and tamped, the explosive and the detonator are placed at the position needing detonating, the detonator is connected with the detonating control assembly through the trigger wire, and then, injecting gas into the high-pressure pipeline by using a pressurizing device to the required pressure, detonating the explosive by using a detonation control assembly after the pressure maintaining is successful, wherein after the explosive is exploded, the high-pressure pipeline is subjected to elastic deformation and plastic deformation under the action of explosion impact, the strain change generated on the surface of the high-pressure pipeline generates a charge signal by using a strain gauge, and the charge signal is transmitted to a data acquisition device through a signal line, so that strain data is obtained.
The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:
the strain gauges are fixed on the high-pressure pipeline in an array mode.
When the pressure charging device is used for stamping the high-pressure pipeline, whether the internal pressure of the high-pressure pipeline is stable or not is monitored through data transmitted by the pressure sensor, and if the pressure fluctuation is overlarge, the high-pressure pipeline is emptied at high pressure through the vent valve of the vent pipeline.
The strain gauge sends the generated charge signal to the signal conditioning device, and the charge signal is amplified by the signal conditioning device and then transmitted to the data acquisition device.
One of the technical schemes of the invention is realized by the following measures: the testing device for implementing the strain testing method when the large-scale high-pressure pipeline is impacted by explosion in one technical scheme comprises a pipeline fixing assembly, an explosion control assembly, a synchronous trigger device, a data acquisition device, a pressurizing device and a power supply device, wherein the high-pressure pipeline is fixed through the pipeline fixing assembly, the device comprises a high-pressure pipeline, a strain gauge, a pressure sensor, a synchronous trigger device, a pressurizing device, a detonation control assembly, a power supply device and a pressure sensor, wherein the strain gauge is fixedly installed at a test position of the high-pressure pipeline, the pressure sensor is fixedly installed on the high-pressure pipeline, a signal output end of the strain gauge and a signal output end of the pressure sensor are respectively connected with a signal input end of the data acquisition device, an output end of the detonation control assembly is connected with an input end of the synchronous trigger device, an output end of the synchronous trigger device is connected with an input end of the data acquisition device, the pressurizing device is.
The following is further optimization or/and improvement of the second technical scheme of the invention:
the detonation control assembly comprises a detonation control device and a detonation control switch, and the detonation control device is connected with the detonation control switch.
The synchronous trigger device adopts a synchronous trigger, and the output end of the detonation control switch is connected with the input end of the synchronous trigger; the data acquisition device adopts a data acquisition instrument; the signal output end of the strain gauge and the signal output end of the pressure sensor are respectively connected with the signal input end of a signal conditioning device, the signal output end of the signal conditioning device is connected with the signal input end of a data acquisition device, and the signal conditioning device adopts a charge amplifier.
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 supply access ends of the detonation control assembly, the synchronous trigger device, the signal conditioning device and the data acquisition device.
The pressurizing device comprises high-pressure gas injection equipment, a gas injection pipeline and a gas exhaust pipeline, wherein the high-pressure gas injection equipment is communicated with the interior of the high-pressure pipeline through the gas injection pipeline; the pipeline fixing assembly comprises a U-shaped concrete groove and a right-angle concrete pier, and the U-shaped concrete groove and the right-angle concrete pier are spliced together; the display device is connected with the data acquisition device.
The strain testing method and the testing device can perform the strain test of explosive explosion impact by the mutual matching of the pipeline fixing assembly, the detonation control assembly, the synchronous trigger device, the data acquisition device, the pressurizing device and the like, and the strain testing device can test the deformation of the surface of the pipeline caused by the impact action of TNT explosives with different doses and different explosion distances to obtain the strain change data of different positions of the pipeline, thereby providing a mode and a method for detecting the strain data and the change rule of the pipeline in the explosion environment and providing a data basis for the blasting operation near the pipeline.
Drawings
FIG. 1 is a schematic top view of example 1 of the present invention.
FIG. 2 is a schematic diagram of a three-dimensional enlarged structure of a high-pressure pipeline fixed by a pipeline fixing assembly.
Fig. 3 is a schematic three-dimensional enlarged structure of the U-shaped concrete trough.
Fig. 4 is a schematic perspective enlarged structure view of a right-angle concrete pier.
Fig. 5 is a schematic diagram of the attachment of the strain gauge.
FIG. 6 is a schematic top view of the high pressure piping attached in an array.
FIG. 7 is a graph showing strain time course.
The codes in the figures are respectively: the device comprises a high-voltage pipeline 1, a strain gauge 2, a signal wire 3, an initiation control device 4, a charge amplifier 5, a data acquisition instrument 6, a synchronous trigger 7, a voltage-stabilized power supply 8, an explosion-proof data test room 9, a generator set 10, an air supply station 11, a high-pressure air injection device 12, a pressure sensor 13, an air injection pipe 14, an exhaust pipe 15, an air release valve 16, a safety pit 17, a TNT explosive 18, a detonator 19, a trigger wire 20, a shielded cable 21, a control room 22, an initiation control switch 23, a display device 24, a power wire 25, a right-angle concrete pier 26, an insulating tape 27, a strong glue 28, an electric iron 29 and a U-shaped concrete trough 30.
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, the testing device includes a pipeline fixing assembly, a detonation control assembly, a synchronous triggering device, a data acquisition device, a pressurizing device and a power supply device, the high-pressure pipeline 1 is fixed by the pipeline fixing assembly, a strain gauge 2 is fixedly installed at a testing position of the high-pressure pipeline 1, a pressure sensor 13 is fixedly installed on the high-pressure pipeline 1, a signal output end of the strain gauge 2 and a signal output end of the pressure sensor 13 are respectively connected with a signal input end of the data acquisition device, an output end of the detonation control assembly is connected with an input end of the synchronous triggering device, an output end of the synchronous triggering device is connected with an input end of the data acquisition device, the pressurizing device is communicated with the inside of the high-pressure pipeline 1, and the detonation control assembly, the synchronous triggering device and the data acquisition device are.
This device passes through mutually supporting of fixed assembly of pipeline, detonation control assembly, synchronous trigger device, data acquisition device, charging device etc. can carry out the strain test of explosive explosion impact, through this strain test device, tests different dose TNT explosive 18, different explosion distance impact and arouse the deformation on pipeline surface and obtain the strain variation data of the different positions of pipeline, selects and provides the experiment reference basis with the distance selection for the explosive dose when near the pipeline explosive construction.
The pipeline fixing assembly ensures the stability of the high-pressure pipeline 1 in the testing process, the gas pressure in the high-pressure pipeline 1 is safely increased and reduced through the pressurizing device, and the data acquisition device is synchronously triggered by the detonation control device 4.
The test device can be further optimized or/and improved according to actual needs:
as shown in fig. 1, the detonation control assembly comprises a detonation control device 4 and a detonation control switch 23, and the detonation control device 4 and the detonation control switch 23 are connected through a shielded cable 21.
The detonation control device 4 is connected with a detonator 19 of explosive (TNT explosive 18) through a trigger line 20, and a detonation control switch 23 is installed in a control room 22.
As shown in fig. 1, the synchronous trigger device adopts a synchronous trigger 7, and the output end of a detonation control switch 23 is connected with the input end of the synchronous trigger 7; the data acquisition device adopts a data acquisition instrument 6; the signal output end of the strain gauge 2 and the signal output end of the pressure sensor 13 are respectively connected with the signal input end of a signal conditioning device, the signal output end of the signal conditioning device is connected with the signal input end of a data acquisition device, and the signal conditioning device adopts a charge amplifier 5.
The signal input end of the charge amplifier 5 is respectively connected with the corresponding strain gauge 2 through a signal wire 3, the signal output end of the pressure sensor 13 is connected with the signal input end corresponding to the charge amplifier 5 through the signal wire 3, and the signal output end of the charge amplifier 5 is connected with the signal input end corresponding to the data acquisition instrument 6 through a shielded cable 21. The output end of the detonation control switch 23 is connected with the input end of the synchronous trigger 7 through a shielded cable 21.
As shown in fig. 1, the pressurizing device includes a high-pressure gas injection device 12, a gas injection pipeline 14 and a gas exhaust pipeline 15, the high-pressure gas injection device 12 is communicated with the inside of the high-pressure pipeline 1 through the gas injection pipeline 14, the gas exhaust pipeline 15 is communicated with the inside of the high-pressure pipeline 1, and a vent valve 16 is arranged on the gas exhaust pipeline 15; the power supply device comprises a generator set 10 and a stabilized voltage power supply 8, the generator set 10 is connected with the stabilized voltage power supply 8, and the output end of the stabilized voltage power supply 8 is respectively connected with the power supply access ends of the detonation control assembly, the synchronous trigger device, the signal conditioning device and the data acquisition device through a power line 25. The gas supply station 11 injects gas into the high-pressure pipe 1 through a high-pressure gas injection device 12.
As shown in fig. 2 to 4, the pipe fixing assembly includes a U-shaped concrete trough 30 and a right-angle concrete pier 26, and the U-shaped concrete trough 30 and the right-angle concrete pier 26 are spliced together.
As shown in fig. 1, the device further includes a display device 24, and the display device 24 is connected to the data acquisition apparatus. The strain data is displayed by the display device 24.
The synchronous trigger 7, the data acquisition instrument 6, the charge amplifier 5, the display device 24 and the stabilized voltage power supply 8 are all arranged in the explosion-proof data test room 9.
The detonation control switch 23 is placed in the control compartment 22 at a safe distance outside the safety pit 17 of the high-pressure pipe 1.
The gas supply station 11 is arranged at a certain safety distance outside the safety pit 17.
The pressure sensor 13 is installed on the high pressure pipe 1 to detect whether an internal gas leakage occurs in the high pressure pipe 1 and to monitor a pressure state of a pressurizing process.
Example 2: as shown in fig. 1, the method for testing the strain of the large-scale high-pressure pipeline 1 when being impacted by explosion is carried out as follows: fixing a high-pressure pipeline 1 to be tested in a safety pit 17 through a pipeline fixing assembly, respectively fixedly installing a strain gauge 2 and a pressure sensor 13 on the high-pressure pipeline 1, then connecting signal output ends of the strain gauge 2 and the pressure sensor 13 with a signal input end of a data acquisition device, backfilling soil in the safety pit 17 and tamping after connection, placing explosive and a detonator 19 at a position needing initiation, connecting the detonator 19 with an initiation control assembly through a trigger wire 20, injecting gas into the high-pressure pipeline 1 to a required pressure by using a pressurizing device, detonating the explosive through the initiation control assembly after pressure maintaining is successful, after the explosive is exploded, enabling the high-pressure pipeline 1 to generate elastic deformation and plastic deformation under the action of explosion impact, enabling the strain gauge 2 to generate a charge signal due to the change of strain generated on the surface of the high-pressure pipeline 1, and transmitting the charge signal to the data acquisition device (data acquisition instrument 6) through a signal wire 3, strain data are thus obtained.
The detonator 19 is fixed on top of the TNT explosive 18 charge by means of transparent adhesive tape.
The size of safety pit 17 is relevant with the size of high-pressure pipeline 1, U type concrete groove 30 and right angle concrete mound 26 in the test, the shape of safety pit 17 is the cuboid, wherein the length of safety pit 17 adds two meters on the basis of high-pressure pipeline 1 and twice right angle concrete mound 26 length sum, so that the construction operation of crane, the width of safety pit 17 adds one meter on the basis of U type concrete groove 30 as the benchmark, so that the pasting of foil gage 2, the height of safety pit 17 is based on the height after U type concrete groove 30 and the right angle concrete mound 26 cooperation.
Example 3: as an optimization of the embodiment 2, as shown in fig. 6, the strain gauges 2 are fixed on the high-pressure pipe 1 in an array manner.
By using the array distribution of the strain gauges 2, the strain change data of different positions of the high-pressure pipeline 1 can be obtained.
As shown in fig. 5 and 6, the strain gauges 2 arranged in an array are mounted: in the test of the strain of the high-pressure pipeline 1, a tape is used for measuring and marking the position needing to be adhered with the strain gauge 2 from the center of the surface of the high-pressure pipeline 1 to one side direction along the axial direction and the radial direction, a polisher is used for grinding a plurality of circular smooth areas at the marked positions for adhering the strain gauges 2, the strain gauges 2 are adhered to the ground surface of the high-pressure pipeline 1 by using strong glue 28, an insulating tape 27 is adhered to the high-pressure pipeline 1 to prevent the short circuit caused by the contact of the wiring of the strain gauges 2 and the surface of the high-pressure pipeline 1, a certain distance is reserved between each group of strain gauges 2, the wiring at the tail end of each strain gauge 2 is connected with a signal wire 3 by using an electric soldering iron 29 in a welding mode, the signal wires 3 are numbered, the insulating tape 27 is wound at the welding position, and the signal wires 3 and the adhered.
Example 4: as the optimization of embodiments 2 to 3, when the pressurizing device is used to press the high-pressure pipeline 1, the data transmitted by the pressure sensor 13 is used to monitor whether the internal pressure of the high-pressure pipeline 1 is stable, if the pressure fluctuation is too large, the high-pressure pipeline 1 is vented at high pressure by the vent valve 16 through the vent line 15; the strain gauge 2 sends the generated charge signal to a signal conditioning device (a charge amplifier 5), and the charge signal is amplified by the signal conditioning device and then transmitted to a data acquisition device (a data acquisition instrument 6).
Example 5: as shown in the attached fig. 1 and 5, the strain test method of the large-scale high-pressure pipeline 1 under the impact of explosion is carried out as follows:
digging out a required safety pit 17 by using an excavator, installing a U-shaped concrete groove 30, a right-angle concrete pier 26 and a high-pressure pipeline 1 into the safety pit 17 by using a crane according to the drawing of figure 1, measuring and marking the position of a strain gauge 2 needing to be pasted on the high-pressure pipeline 1 in the axial direction and the longitudinal direction by using a tape measure, wherein the strain gauge 2 is a 120-3AA type strain gauge, the base size is 6.6 multiplied by 3.2 mm, the wire grid size is 3.0 multiplied by 2.3 mm, and the measuring range is 0-100000μEpsilon, the resistance value is 120.3 +/-0.1 omega, a strain gage 2 is pasted according to the mode shown in figure 5, meanwhile, the connection wire of the strain gage 2 is connected with a signal wire 3, the signal wire 3 is numbered according to the position of the strain gage 2, the signal wire 3 and the pasted strain gage 2 are fixed on a high-voltage pipeline 1 by using an insulating tape 27, and finally, the whole strain gage 2 and part of the signal wire 3 are fixed in a full-covering mode by using the insulating tape 27, so that the strain gage is prevented from falling off in the subsequent operation process.
Connecting all signal wires 3 with numbers connected with the strain gauges 2 to input ends of charge amplifiers 5 with corresponding numbers, connecting output ends of the charge amplifiers 5 to input ends of a data acquisition instrument 6 through the signal wires 3, connecting output ends of the data acquisition instrument 6 to a display device 24 through a shielded cable 21 (Q9 copper core shielded cable 21), connecting output ends of an initiation control switch 23 and an input end of a synchronous trigger 7 in a control room 22 through the shielded cable 21, connecting the output end of the initiation control switch 23 and the input end of an initiation control device 4 through the shielded cable 21, connecting output ends of the synchronous trigger 7 to the input end of the data acquisition instrument 6 through the shielded cable 21, connecting a generator set 10 to a voltage-stabilized power supply 8 through a power supply cable, connecting the voltage-stabilized power supply 8 to the charge amplifiers 5, the data acquisition instrument 6 and the synchronous trigger 7, The display device 24 is connected.
The high-pressure pipeline 1 is injected with gas to 12 MPa to 13 MPa through a gas injection pipeline 14 by using a high-pressure gas injection device 12 of a gas supply station 11 arranged 1 kilometer outside a safety pit 17, and whether the internal pressure of the pipeline is stable or not is monitored through data transmitted to a display device 24 by a pressure sensor 13.
If the pressure fluctuation is serious, the pipeline is emptied by the emptying valve 16 through the exhaust pipeline 15, the high-pressure pipeline 1 is reinforced and sealed at the possible leakage position, the pipeline is injected by the high-pressure gas injection equipment 12 through the gas injection pipeline 14 after sealing, and the process is repeated until the pressure is stable. At the moment, the gas in the high-pressure pipeline 1 is continuously emptied, an excavator is used for backfilling soil in the excavated safety pit 17 into the tamped pipeline, the connected TNT explosive 18 and the detonator 19 are placed at the position needing detonating, the detonator 19 is connected with the detonating control device 4 through the trigger line 20, the trigger line 20 can use enameled wires with appropriate parameters, finally, high-pressure gas filling equipment is used for injecting gas into the high-pressure pipeline 11 to 12 MPa to 13 MPa through the gas injection pipeline 14, and explosive explosion can be carried out after pressure maintaining is successful.
Before the explosive explodes, relevant parameters of the data acquisition instrument 6 are set, and the synchronous trigger 7 is set to be in a state to be triggered. And safety inspection and warning are carried out before explosive explosion, and all field participators are guaranteed to be withdrawn to a safety interval of 1 km away. The explosive is detonated by using a detonation control switch 23 in a control room 22 of a safety area, after the explosive is detonated, the high-pressure pipeline 1 is subjected to elastic deformation and plastic deformation under the action of explosion impact, the surface of the high-pressure pipeline 1 generates strain change, a strain gage 2 generates a charge signal, the charge signal is transmitted to a charge amplifier 5 through a signal wire 3, the charge signal is amplified by the charge amplifier 5 and then transmitted to a data acquisition instrument 6, the charge signal is converted into strain data by the data acquisition instrument 6 and is transmitted to a display device 24, and the change of the strain along with time is displayed in the form of a strain time-course change curve through the display device 24 (see fig. 7).
The explosion process time is less than 1 s, but the scene can produce the floating dust because of the explosion, should not get into the test field this moment, carry out the atmospheric pressure to high-pressure pipeline 1 through atmospheric valve 16 earlier, wait that high-pressure pipeline 1 internal pressure drops to the ordinary pressure, the scene does not have the macroscopic floating dust again to get into the test field simultaneously, the damage degree to the equipment is examined and is collected the arrangement, collect and arrange in order on-the-spot signal line 3 and shielded cable 21, derive test data and handle data, the corresponding information between clear data and foil gage 2.
The strain testing method and the strain testing device provide a method for detecting pipeline strain data and change rules thereof in an explosion environment, and provide data basis for blasting 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 (9)
1. A strain testing method for a large-scale high-pressure pipeline under explosion impact is characterized by comprising the following steps: the method comprises the steps that a high-pressure pipeline to be tested is fixed in a safety pit through a pipeline fixing assembly, a strain gauge and a pressure sensor are fixedly installed on the high-pressure pipeline respectively, then the signal output ends of the strain gauge and the pressure sensor are connected with the signal input end of a data acquisition device, after the connection is finished, soil in the safety pit is backfilled and tamped, explosives and detonators are placed at positions needing to be detonated, the detonators are connected with a detonation control assembly through trigger wires, then the high-pressure pipeline is injected with air to the needed pressure through a pressurizing device, after pressure maintaining is successful, the explosives are detonated through the detonation control assembly, after the explosives are detonated, the high-pressure pipeline is subjected to elastic deformation and plastic deformation under the action of explosion impact, strain changes are generated on the surface of the high-pressure pipeline, the strain gauge generates charge signals, the charge signals are transmitted to.
2. The method for testing the strain of the large-scale high-pressure pipeline impacted by explosion according to claim 1, wherein the strain gauges are fixed on the high-pressure pipeline in an array manner.
3. The method for testing the strain of the large-scale high-pressure pipeline impacted by explosion according to claim 1 or 2, wherein when the high-pressure pipeline is stamped by using the pressurizing device, whether the internal pressure of the high-pressure pipeline is stable is monitored through data transmitted by the pressure sensor, and if the pressure fluctuation is overlarge, the high-pressure pipeline is vented at high pressure through a vent valve through a vent line; or/and the strain gauge sends the generated charge signal to the signal conditioning device, and the charge signal is amplified by the signal conditioning device and then transmitted to the data acquisition device.
4. A testing device for implementing the strain testing method of claim 1, 2 or 3 when the large-scale high-pressure pipeline is impacted by explosion, it is characterized by comprising a pipeline fixing assembly, a detonation control assembly, a synchronous trigger device, a data acquisition device, a pressurizing device and a power supply device, wherein a high-pressure pipeline is fixed by the pipeline fixing assembly, the device comprises a high-pressure pipeline, a strain gauge, a pressure sensor, a synchronous trigger device, a pressurizing device, a detonation control assembly, a power supply device and a pressure sensor, wherein the strain gauge is fixedly installed at a test position of the high-pressure pipeline, the pressure sensor is fixedly installed on the high-pressure pipeline, a signal output end of the strain gauge and a signal output end of the pressure sensor are respectively connected with a signal input end of the data acquisition device, an output end of the detonation control assembly is connected with an input end of the synchronous trigger device, an output end of the synchronous trigger device is connected with an input end of the data acquisition device, the pressurizing device is.
5. The test device of claim 4, wherein the detonation control assembly comprises a detonation control device and a detonation control switch, the detonation control device being connected to the detonation control switch.
6. The testing device of claim 5, wherein the synchronous trigger device is a synchronous trigger, and the output end of the detonation control switch is connected with the input end of the synchronous trigger; or/and the data acquisition device adopts a data acquisition instrument; or/and the signal output end of the strain gauge and the signal output end of the pressure sensor are respectively connected with the signal input end of the signal conditioning device, the signal output end of the signal conditioning device is connected with the signal input end of the data acquisition device, and the signal conditioning device adopts a charge amplifier.
7. The testing device of claim 6, wherein the power supply device comprises a generator set and a regulated power supply, the generator set is connected with the regulated power supply, and an output end of the regulated power supply is connected with power supply access ends of the detonation control assembly, the synchronous triggering device, the signal conditioning device and the data acquisition device respectively.
8. The test device according to claim 4, 5 or 6, wherein the pressurizing device comprises a high-pressure gas injection device, a gas injection pipeline and a gas exhaust pipeline, the high-pressure gas injection device 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 comprises a U-shaped concrete groove and a right-angle concrete pier, and the U-shaped concrete groove and the right-angle concrete pier are spliced together; or/and the display device is also included and is connected with the data acquisition device.
9. The testing device according to claim 7, wherein the pressurizing device comprises a high-pressure gas injection device, a gas injection pipeline and a gas exhaust pipeline, the high-pressure gas injection device 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 comprises a U-shaped concrete groove and a right-angle concrete pier, and the U-shaped concrete groove and the right-angle concrete pier are spliced together; or/and the display device is also included and is connected with the data acquisition device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110030520.7A CN112902822A (en) | 2021-01-11 | 2021-01-11 | Strain testing method and device for large-scale high-pressure pipeline under explosive impact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110030520.7A CN112902822A (en) | 2021-01-11 | 2021-01-11 | Strain testing method and device for large-scale high-pressure pipeline under explosive impact |
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| CN105091662A (en) * | 2014-05-14 | 2015-11-25 | 中国石油天然气股份有限公司 | Testing device and testing method for gun barrel of perforating gun |
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| CN109975142A (en) * | 2019-04-30 | 2019-07-05 | 公安部第一研究所 | A kind of non-contact explosion wave superpressure test macro of plate product and method |
| CN209264226U (en) * | 2018-12-19 | 2019-08-16 | 中国地质大学（武汉） | The pilot system that simulation attack of terrorism ground burst influences gas pipeline |
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| CN105091662A (en) * | 2014-05-14 | 2015-11-25 | 中国石油天然气股份有限公司 | Testing device and testing method for gun barrel of perforating gun |
| CN106989889A (en) * | 2017-05-16 | 2017-07-28 | 中国水利水电科学研究院 | A kind of TT＆C system for centrifuge underwater explosion model test |
| CN107271635A (en) * | 2017-06-30 | 2017-10-20 | 中国石油天然气股份有限公司西部管道分公司 | A kind of method of testing of the three-dimensional Overpressure Field of open space large scale flammable vapor cloud explosion |
| CN209264226U (en) * | 2018-12-19 | 2019-08-16 | 中国地质大学（武汉） | The pilot system that simulation attack of terrorism ground burst influences gas pipeline |
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