CN111089898A - Shallow layer gas acoustic response testing arrangement - Google Patents
Shallow layer gas acoustic response testing arrangement Download PDFInfo
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- CN111089898A CN111089898A CN201911293843.4A CN201911293843A CN111089898A CN 111089898 A CN111089898 A CN 111089898A CN 201911293843 A CN201911293843 A CN 201911293843A CN 111089898 A CN111089898 A CN 111089898A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0658—Indicating or recording means; Sensing means using acoustic or ultrasonic detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/021—Gases
- G01N2291/0215—Mixtures of three or more gases, e.g. air
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/103—Number of transducers one emitter, two or more receivers
Abstract
The application discloses shallow layer gas acoustic response testing arrangement includes: the reaction vessel is provided with a reaction cavity, the upper side of the reaction cavity is provided with a sound emitting element, the lower side of the reaction cavity is provided with a sound receiving element, and the sound emitting element and the sound receiving element are oppositely arranged; the pressure regulating assembly is connected with the reaction container and is used for regulating the pressure of the reaction cavity; the gas injection assembly is communicated with the interior of the reaction vessel and is used for injecting gas into the reaction cavity; the control assembly is electrically connected with the sound emission element, the sound receiving element, the pressure adjusting assembly and the gas injection assembly, can control the opening and closing of the sound emission element, the sound receiving element, the pressure adjusting assembly and the gas injection assembly, and can acquire sound wave information emitted by the sound emission element and sound wave information received by the sound receiving element. The shallow gas acoustic response testing device provided by the application can obtain the acoustic parameter change after the acoustic signal penetrates through the shallow gas, thereby obtaining the shallow gas pressure characteristic and the mechanical characteristic of the stratum.
Description
Technical Field
The application relates to the technical field of oil and gas development, in particular to a shallow gas acoustic response testing device.
Background
Shallow layer gas refers to various natural gas resources with shallow buried depth (generally within 1500 meters) and small reserves. Mainly comprises biogas, oil type gas, coal bed methane gas, water-soluble gas and the like. Shallow gas is a mineral resource and also a source of geological disasters. With the deep development of oil and gas development, the geological disaster of shallow gas is continuously paid attention to in the drilling and production process.
In the prior art, shallow gas geological disasters are mainly identified by means of a seismic profile technology for prediction. The seismic section is a section of a ground wave impedance reflection interface formed by data acquisition and processing, and has three display modes: one-dimensional display, two-dimensional display, and three-dimensional display. However, the prediction precision is not high when the seismic profile technology is used for predicting the shallow gas geological disaster.
Disclosure of Invention
In view of the defects of the prior art, an object of the present application is to provide a shallow gas acoustic response testing apparatus, which is capable of obtaining acoustic parameter changes after acoustic signals penetrate through shallow gas, so as to obtain shallow gas pressure characteristics and mechanical characteristics of a stratum, and is also helpful for studying the influence rule of the shallow gas on the acoustic characteristics, so as to lay a theoretical foundation for establishing a shallow gas geological disaster acoustic prediction model and further analyzing the risk of drilling in the shallow gas in the next step.
In order to achieve the purpose, the technical scheme is as follows:
a superficial aeroacoustic response testing device comprising:
the reaction vessel is provided with a reaction cavity, the upper side of the reaction cavity is provided with a sound emitting element, the lower side of the reaction cavity is provided with a sound receiving element, and the sound emitting element and the sound receiving element are arranged oppositely;
the pressure regulating assembly is connected with the reaction container and is used for regulating the pressure of the reaction cavity;
the gas injection assembly is communicated with the interior of the reaction vessel and is used for injecting gas into the reaction cavity;
the control assembly is electrically connected with the sound emission element, the sound receiving element, the pressure adjusting assembly and the gas injection assembly, can control the opening and closing of the sound emission element, the sound receiving element, the pressure adjusting assembly and the gas injection assembly, and can acquire sound wave information emitted by the sound emission element and sound wave information received by the sound receiving element.
In a preferred embodiment, the sound-emitting element is surrounded by a first protective shell, and the sound-receiving element is surrounded by a second protective shell; the sound receiving element is wrapped by a second protective shell; the acoustic emission element is provided on an inner wall surface of an upper side of the reaction vessel, and the acoustic reception element is provided on an inner wall surface of a lower side of the reaction vessel.
In a preferred embodiment, the acoustic emission element is located at the center of the upper side of the reaction chamber, and the two acoustic receiving elements are located at the lower side of the reaction chamber and are symmetrical with respect to the center of the lower side of the reaction chamber, and are respectively used for receiving transverse wave information and longitudinal wave information.
As a preferred embodiment, the gas injection assembly comprises:
the air inlet is arranged at the bottom of the reaction container;
an air inlet line connected to the air inlet;
the gas cylinder is positioned at one end of the gas inlet pipeline, which is far away from the gas inlet;
the booster pump, the pressure regulating valve and the flow control element are arranged on the gas inlet pipeline in sequence from upstream to downstream and are positioned between the gas cylinder and the gas inlet.
In a preferred embodiment, the booster pump is connected with a pressure relief valve, and a one-way valve and a dry filter are arranged between the flow control element and the air inlet; and the bottom of the reaction container is provided with an air outlet.
As a preferred embodiment, a test rack for placing the reaction vessel is arranged outside the reaction vessel, and the pressure regulating assembly is connected with the test rack; the reaction vessel is provided with a vessel cover, and the vessel cover is provided with a flange hole for installation;
the container cover is also provided with a sound emission element wire preformed hole and a sound receiving element wire preformed hole, and the sound emission element and the sound receiving element are electrically connected to the control component through wires.
Has the advantages that:
the shallow gas acoustic response testing device that this application embodiment provided through setting up acoustic emission component and acoustic receiving element, can obtain the acoustic parameter change after the sound wave signal pierces through the shallow gas to obtain the mechanical characteristics of shallow gas pressure characteristic and stratum, still be favorable to studying the influence law of shallow gas to acoustic characteristics, establish the theoretical basis for next step shallow gas geological disasters acoustic prediction model and further analysis brill meet shallow gas risk etc..
In addition, the pressure in the reaction cavity can be changed by arranging the pressure adjusting assembly, so that the acoustic response characteristics of the shallow layer gas under different pressure conditions can be researched. The device can monitor acoustic response information in tests such as shallow gas formation bearing capacity simulation tests, shallow air pressure variable stress loading tests and the like. The device is easy and simple to handle, can realize the synchronous collection of acoustic signal in the mechanical experimental process of different soil layer properties under the vary voltage state. The device is also suitable for synchronous monitoring of acoustic characteristics of shallow gas strata under different pressure conditions of deep water shallow strata, is suitable for synchronous measurement of sound wave information of different types of shallow strata under different pressure environments, and can solve the problem of measurement of sound wave state of shallow strata under deep water high pressure state.
Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a shallow aeroacoustic response testing apparatus provided in an embodiment of the present application;
FIG. 2 is a top view of the pressure adjustment assembly and container lid assembly of FIG. 1;
FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 2;
FIG. 4 is a top view of the reaction vessel without the vessel lid;
FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;
FIG. 6 is a schematic illustration of a gas injection assembly according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram of a simulation experiment for a superficial gas acoustic response test in an embodiment of the present application.
Description of reference numerals:
1. a reaction vessel; 11. a reaction chamber; 12. an air inlet; 13. an air outlet; 14. a container cover; 15. a flange hole; 16. a preformed hole of a lead of the acoustic emission element; 17. a sound receiving element lead preformed hole; 19. a flange interface;
21. an acoustic emission element; 22. an acoustic receiving element;
3. a pressure regulating assembly; 31. a push rod; 32. a loading member; 33. pushing the plate; 34. a seal member;
4. a gas injection assembly; 41. a gas cylinder; 42. a booster pump; 43. a pressure regulating valve; 44. a flow control element; 45. a pressure relief valve; 46. a one-way valve; 47. drying the filter; 48. a first valve; 49. a gas cylinder pressure sensor; 410. an air compressor;
5. a control component;
6. an experiment frame;
81. axial pressure.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
For convenience of explanation, the upward direction in fig. 1 is defined as "upper" of the shallow aeroacoustic response test apparatus, and the downward direction in fig. 1 is defined as "lower" of the shallow aeroacoustic response test apparatus in this specification. The direction of the left hand when the reader is facing FIG. 1 is defined as "left", and the direction of the right hand when the reader is facing FIG. 1 is defined as "right".
Please refer to fig. 1. The embodiment of the application provides a shallow gas acoustic response testing device, which comprises a reaction vessel 1, a pressure regulating assembly 3, a gas injection assembly 4 and a control assembly 5.
Wherein the reaction vessel 1 has a reaction chamber 11. The upper side of the reaction chamber 11 is provided with an acoustic emission element 21. The lower side of the reaction chamber 11 is provided with a sound receiving member 22. The sound emitting element 21 and the sound receiving element 22 are oppositely disposed. The pressure regulating assembly 3 is connected with the reaction vessel 1 and is used for regulating the pressure of the reaction cavity 11. The gas injection assembly 4 is communicated with the interior of the reaction vessel 1 and is used for injecting gas into the reaction cavity 11. The control component 5 is electrically connected with the sound emission element 21, the sound receiving element 22, the pressure regulating component 3 and the gas injection component 4, can control the opening and closing of the sound emission element 21, the sound receiving element 22, the pressure regulating component 3 and the gas injection component 4, and can acquire sound wave information emitted by the sound emission element 21 and sound wave information received by the sound receiving element 22. The acoustic information includes information such as acoustic velocity, amplitude, period, frequency, phase, wavelength, etc.
The shallow gas acoustic response testing device provided by the embodiment of the application can obtain the acoustic parameter change of a sound wave signal after penetrating through the shallow gas by arranging the sound emitting element 21 and the sound receiving element 22, thereby obtaining the mechanical characteristics of the shallow gas pressure characteristic and the stratum, being also helpful for researching the influence rule of the shallow gas on the acoustic characteristics, and laying a theoretical foundation for establishing a shallow gas geological disaster acoustic prediction model and further analyzing the risk of drilling in the shallow gas.
In addition, the pressure regulating assembly 3 is arranged in the embodiment of the application, so that the pressure in the reaction cavity 11 can be changed, and the shallow aeroacoustic response characteristics under different pressure conditions can be researched. The device can monitor acoustic response information in tests such as shallow gas formation bearing capacity simulation tests, shallow air pressure variable stress loading tests and the like. The device is easy and simple to handle, can realize the synchronous collection of acoustic signal in the mechanical experimental process of different soil layer properties under the vary voltage state. The device is also suitable for synchronous monitoring of acoustic characteristics of shallow gas strata under different pressure conditions of deep water shallow strata, is suitable for synchronous measurement of sound wave information of different types of shallow strata under different pressure environments, and can solve the problem of measurement of sound wave state of shallow strata under deep water high pressure state.
Because shallow layer gas in deep sea has characteristics such as high pressure, small, buried depth little, carry out indoor test through the shallow layer gas acoustic response testing arrangement that this application embodiment provided, through survey transverse wave, longitudinal wave penetrate the acoustic parameter change of the acoustic wave signal behind the shallow layer gas, can indirectly know and demonstrate the mechanical characteristics of shallow layer atmospheric pressure characteristic and stratum, provide the guide basis for shallow layer gas geological calamity prediction in the oil gas exploration process. Therefore, a risk control method system is established for shallow gas well blowout accidents, a shallow gas well blowout accident model for deep-water shallow drilling operation is established, the shallow gas well blowout accident risk is reduced to an acceptable level, and the loss and the risk of offshore development can be greatly reduced. Therefore, it is of great significance to develop a set of test device capable of meeting the requirements of shallow gas acoustic response in a high-pressure environment.
The shallow gas acoustic response testing arrangement that this application embodiment provided can test the acoustic response of shallow gas vary voltage state, tests and appraises the influence of shallow gas pressure to sound wave signal, and then the influence of research pressure to the shallow gas characteristic provides the guidance foundation for shallow gas geological disaster prediction in the oil gas exploration process.
The shape of the reaction vessel 1 and the reaction chamber 11 is not limited in the embodiment of the present invention, and may be various shapes such as a rectangular parallelepiped shape and a cylindrical shape. For convenience of explanation, in the embodiment of the present invention, it is preferable that the reaction vessel 1 has a cylindrical shape and the reaction chamber 11 has a cylindrical shape. The reaction vessel 1 has a high pressure-bearing property, and can withstand a pressure of 30 MPa, for example. The reactor vessel 1 may be used to simulate shallow formation pressures at 3000 m water depth.
In the present embodiment, the sound emitting element 21 may be covered with a first protective shell to protect the sound emitting element 21. A second protective shell may be wrapped around the sound receiving member 22 to protect the sound receiving member 22. The sound emitting element 21 may be provided on an inner wall surface of an upper side of the reaction vessel, and the sound receiving element 22 may be provided on an inner wall surface of a lower side of the reaction vessel. Specifically, one of the sound emitting elements 21 is provided at the center of the upper side of the reaction chamber 11. The two sound receiving elements 22 are located at the lower side of the reaction chamber 11 and are symmetrical with respect to the center of the lower side of the reaction chamber 11, and the two sound receiving elements 22 are respectively used for receiving transverse wave information and longitudinal wave information.
The sound emitting element 21 and the sound receiving element 22 may be periodic test probes having the same duty cycle. The first protective case may be fixed to the upper wall surface of the inner wall of the reaction vessel 1 for placing the sound emitting element 21. Two second protective cases may be fixed to the lower wall surface of the inner wall of the reaction vessel 1 for placing the sound receiving member 22. In addition, the upper wall surface and the lower wall surface of the inner wall of the reaction vessel 1 may be provided with sealing grooves for mounting the sound emitting element 21 or the sound receiving element 22. The sound-emitting element 21 and the sound-receiving element 22 are also connected to wires, via which the control unit 5 is connected.
In the present embodiment, as shown in fig. 3, the pressure adjustment assembly 3 includes a push rod 31, a loading member 32, a push plate 33, and a sealing member 34. The push rod 31 extends along the length of the reaction vessel 1 and applies an axial pressure 81 to the reaction chamber 11 as shown in fig. 7. The loading part 32 is connected with the push rod 31 and provides power for the push rod 31. The loading member 32 may employ hydraulic control of the axial pressure 81. The push plate 33 is connected with the push rod 31. The push plate 33 is disposed in the reaction chamber 11. The section of the push plate 33 is the same as that of the reaction chamber 11. For example, the push plate 33 may be a circular plate with a radius equal to the radius of the reaction chamber 11, and the circular plate extends into the reaction chamber 11 to compact the soil downward. The sealing member 34 is located at the joint of the push rod 31 and the reaction vessel 1, and is used for sealing the reaction chamber 11.
In the present embodiment, the gas injection assembly 4 includes a gas inlet 12, a gas inlet line, a gas cylinder 41, a pressurizing pump 42, a pressure regulating valve 43, and a flow control member 44. The gas inlet 12 is arranged at the bottom of the reaction vessel 1. The gas is injected from the lower part of the reaction vessel 1, so that the gas can rise freely, thereby facilitating the gas to uniformly fill the whole reaction chamber 11. The intake line is connected to the intake port 12. The gas cylinder 41 is located at the end of the gas inlet line remote from the gas inlet 12. The gas cylinders 41 may include carbon dioxide cylinders, methane cylinders, and the like. Since different formations have different properties, the nature and parameters of the shallow gas determine the type and proportion of gas injected in order to simulate the condition of the shallow gas. In actual operation, the type and quality of injected gas are adjusted according to the actual needs of simulated shallow gas properties. A first valve 48 and a cylinder pressure sensor 49 may be disposed at the outlet of the cylinder 41, the first valve 48 is used for controlling the opening and closing of the cylinder 41, and the cylinder pressure sensor 49 is used for displaying the pressure of the gas coming out from the outlet of the cylinder 41. The gas cylinder 41 may also be connected to a silent air compressor.
The booster pump 42, the pressure regulating valve 43, and the flow control member 44 are located downstream of the gas cylinder 41. The booster pump 42, the pressure regulating valve 43, and the flow control member 44 are disposed on the intake line in this order from upstream to downstream, between the gas cylinder 41 and the gas inlet 12. The booster pump 42 is used for boosting the gas from the gas cylinder 41, and the booster pump 42 may be connected to the air compressor 410. The pressure regulating valve 43 is used for regulating the gas pressure to a pressure value required by the test. The flow control element 44 may be a gas flow meter for controlling the amount of gas injected into the reaction vessel 1, and may also control the flow rate of gas into the gas inlet 12, the instantaneous amount and cumulative amount of gas metered into the reaction vessel.
For ease of understanding, the gas injection process of the embodiments of the present application is described with reference to fig. 6. The cylinder 41 is first opened to inject carbon dioxide and/or methane gas. The gas is introduced into the booster pump 42 through the gas inlet line, the pressure of the pressurized gas is adjusted to a predetermined pressure value by the pressure adjusting valve 43, and the amount of the gas to be injected is controlled by the flow control member 44 and is injected into the reaction chamber 11 through the gas inlet 12. For better and safer control of the gas in the intake line, valves, pressure gauges, etc. may be provided at various locations of the intake line, which is not limited in this application.
Specifically, the booster pump 42 may be connected with a pressure relief valve 45. After the superficial gas acoustic response test is completed, the pressure relief valve 45 may be opened to relieve the booster pump 42. A check valve 46 and a dry filter 47 are arranged between the flow control element 44 and the gas inlet 12, so that the moisture-containing gas in the reaction chamber 11 is prevented from entering the flow control element 44, and the flow control element 44 is prevented from being damaged. As shown in fig. 5, the bottom of the reaction vessel 1 may be provided with a gas outlet 13 for discharging or recycling gas in the reaction chamber after the shallow gas acoustic response test is completed, and the gas outlet is arranged at the bottom for convenient operation. The testing device can also be provided with a gas recovery assembly. The gas outlet 13 may be connected to a gas recovery unit to achieve gas recovery.
In the embodiment of the present application, a laboratory rack 6 for placing the reaction vessel 1 is provided outside the reaction vessel 1. The pressure regulating assembly 3 is connected with the experiment frame 6. The reaction vessel 1 may be provided with a vessel lid 14. The sound emitting element 21 may be provided at the center of the lower end surface of the container lid 14. The vessel lid 14 is provided with a flange hole 15 for mounting the vessel lid 14 to the reaction vessel 1. Specifically, 12 flange holes 15 may be uniformly distributed on the outer edge of the container cover 14. Accordingly, as shown in fig. 4 and 5, the reaction vessel 1 may be provided with a flange interface 19 that matches the flange hole 15. The flange connects the vessel lid 14 and the reaction vessel 1 together via the flange hole 15 and the flange connection 19.
As shown in fig. 2, the container cover 14 may further have a sound emitting element wire preformed hole 16 and a sound receiving element wire preformed hole 17 for providing a passage for the wires of the sound emitting element 21 and the sound receiving element 22, respectively. The sound emitting element 21 and the sound receiving element 22 are electrically connected to the control component 5 through wires. The sound-emitting element wire preformed holes 16 and the sound-receiving element wire preformed holes 17 can also extend into the wall surface of the reaction vessel 1 according to design requirements.
In the embodiment of the present application, the control component 5 may specifically be a computer provided with an analog signal data acquisition module and data acquisition control software, and of course, the control component 5 may also be in other forms, and the present application is not limited specifically herein. The control unit 5 can perform measurement and control of acoustic information during the test. The control component 5 controls sound wave emission by a wire through a wire preformed hole 16 of the sound emission element; the sound receiving member 22 transmits sound wave information to the control unit 5 through the sound receiving member lead wire prepared hole 17 by means of a lead wire.
In a specific application scenario, when the shallow aeroacoustic response test device provided by the embodiment of the present application is used for shallow aeroacoustic response test, the following test steps are provided:
1. and placing the prepared shallow stratum soil body in the reaction cavity 11.
2. The container cover 14 is fixed with the reaction container 1, and the soil in the reaction cavity 11 is compacted by the push plate 33 of the pressure regulating assembly 3.
3. The sound-emitting element 21 and the sound-receiving element 22 are turned on and recording is started.
4. Gas is injected into the reaction chamber 11, and the gas injection amount is recorded in real time by using the gas injection assembly to control the pressure in the reaction chamber.
5. And under different pressure stable states, multiple times of sound wave information is obtained through testing. (the pressure can be varied from 10 to 30 MPa, and 20 groups of data can be tested)
6. After the test is finished, the air outlet 13 is opened for air release.
7. And opening the reaction cavity 11, pouring out the simulated soil body, and discharging engineering gas.
It should be noted that, in the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is intended or should be construed to indicate or imply relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.
Any numerical value recited herein includes all values from the lower value to the upper value, in increments of one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.
Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.
All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.
A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego such subject matter, nor should the inventors be construed as having contemplated such subject matter as being part of the disclosed subject matter.
Claims (6)
1. A superficial aeroacoustic response testing device, comprising:
the reaction vessel is provided with a reaction cavity, the upper side of the reaction cavity is provided with a sound emitting element, the lower side of the reaction cavity is provided with a sound receiving element, and the sound emitting element and the sound receiving element are arranged oppositely;
the pressure regulating assembly is connected with the reaction container and is used for regulating the pressure of the reaction cavity;
the gas injection assembly is communicated with the interior of the reaction vessel and is used for injecting gas into the reaction cavity;
the control assembly is electrically connected with the sound emission element, the sound receiving element, the pressure adjusting assembly and the gas injection assembly, can control the opening and closing of the sound emission element, the sound receiving element, the pressure adjusting assembly and the gas injection assembly, and can acquire sound wave information emitted by the sound emission element and sound wave information received by the sound receiving element.
2. The superficial gas acoustic response testing device of claim 1, wherein the acoustic emitting element is externally wrapped with a first protective shell and the acoustic receiving element is externally wrapped with a second protective shell; the acoustic emission element is provided on an inner wall surface of an upper side of the reaction vessel, and the acoustic reception element is provided on an inner wall surface of a lower side of the reaction vessel.
3. The superficial gas acoustic response testing device of claim 1, wherein the acoustic emission element is located at the center of the upper side of the reaction chamber; the two sound receiving elements are positioned on the lower side of the reaction cavity and are symmetrical about the center of the lower side of the reaction cavity, and the two sound receiving elements are respectively used for receiving transverse wave information and longitudinal wave information.
4. The superficial gas acoustic response testing apparatus of claim 1, wherein the gas injection assembly comprises:
the air inlet is arranged at the bottom of the reaction container;
an air inlet line connected to the air inlet;
the gas cylinder is positioned at one end of the gas inlet pipeline, which is far away from the gas inlet;
the booster pump, the pressure regulating valve and the flow control element are arranged on the gas inlet pipeline in sequence from upstream to downstream and are positioned between the gas cylinder and the gas inlet.
5. The superficial gas acoustic response testing device of claim 4, wherein a pressure relief valve is connected to the booster pump, and a one-way valve and a dry filter are arranged between the flow control element and the gas inlet; and the bottom of the reaction container is provided with an air outlet.
6. The superficial gas acoustic response testing device of claim 1, wherein a test rack for placing the reaction vessel is arranged outside the reaction vessel, and the pressure regulating assembly is connected with the test rack; the reaction vessel is provided with a vessel cover, and the vessel cover is provided with a flange hole for installation;
the container cover is also provided with a sound emission element wire preformed hole and a sound receiving element wire preformed hole, and the sound emission element and the sound receiving element are electrically connected to the control component through wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911293843.4A CN111089898A (en) | 2019-12-16 | 2019-12-16 | Shallow layer gas acoustic response testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911293843.4A CN111089898A (en) | 2019-12-16 | 2019-12-16 | Shallow layer gas acoustic response testing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111089898A true CN111089898A (en) | 2020-05-01 |
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