CN111879474B - Seabed gas leakage detection simulation device - Google Patents
Seabed gas leakage detection simulation device Download PDFInfo
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- CN111879474B CN111879474B CN202010497178.7A CN202010497178A CN111879474B CN 111879474 B CN111879474 B CN 111879474B CN 202010497178 A CN202010497178 A CN 202010497178A CN 111879474 B CN111879474 B CN 111879474B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/661—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters using light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/666—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters by detecting noise and sounds generated by the flowing fluid
Abstract
The invention relates to the field of submarine observation, in particular to a submarine gas leakage detection simulation device. The multifunctional shooting device comprises a housing, shoot the mechanism, multi-beam echo detection mechanism, bubble generator and valve actuating mechanism, the casing includes preceding wallboard, lateral wall board and back wallboard, preceding wallboard, be watertight fixed connection between lateral wall board and the back wallboard, preceding wallboard, the equal watertight fixedly connected with bottom plate in bottom of lateral wall board and back wallboard, the middle part of preceding wallboard is equipped with interior concave part, the outside of interior concave part is equipped with shoots the mechanism, the outside of preceding wallboard is equipped with multi-beam echo detection mechanism, be equipped with bubble generator on the bottom plate, bubble generator is connected with valve actuating mechanism. The simulation system realizes the simulation of the escape process of different gases at the seabed, can simulate different bubble numbers and bubble speeds, and has the advantages of simple structure, convenient use and low cost.
Description
Technical Field
The invention relates to the field of submarine observation, in particular to a submarine gas leakage detection simulation device.
Background
The amount of methane leaking from the subsea cold spring natural gas into the body of marine water and into the atmosphere is quite surprising, and because methane is a greenhouse gas, such large methane release is an important contributor to global climate change. Research on the leakage of subsea cold spring natural gas is continuously being advanced due to the great impact of subsea cold spring gas release on the global environment. At present, an in-situ flow online measuring device appears in China, but the in-situ measurement has high requirements on the measurement environment, has various limitations on the aspects of equipment materials, power consumption and the like, has small practical value, needs to be improved in working performance and stability, is limited by the conditions of the prior art, and is difficult to realize long-term in-situ online monitoring. In order to gradually improve the in-situ observation level and reduce the research and development test cost, a seabed gas leakage detection device with bubble generation capacity is urgently needed at present, the natural seabed cold spring natural gas leakage process is simulated, and powerful technical support is provided for the fine research of seabed cold spring leakage flux and the like.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a seabed gas leakage detection simulation device which realizes the simulation of the escape process of different gases at the seabed, can simulate different bubble numbers and bubble speeds, and has the advantages of simple structure, convenient use and low cost.
The technical scheme of the invention is as follows: a seabed gas leakage detection simulation device comprises a shell, a shooting mechanism, a multi-beam echo detection mechanism, a bubble generator and a gas distribution mechanism, wherein the shell comprises a front wall plate, a side wall plate and a rear wall plate which are fixedly connected in a watertight manner, the bottoms of the front wall plate, the side wall plate and the rear wall plate are fixedly connected in a watertight manner, a bottom plate is fixedly connected with the bottoms of the front wall plate, the side wall plate and the rear wall plate in a watertight manner, an inner concave part is arranged in the middle of the front wall plate, the shooting mechanism is arranged on the outer side of the inner concave part, the multi-beam echo detection mechanism is arranged on the outer side of the front wall plate;
the bubble generator comprises an upper air chamber, a lower air chamber, a valve mechanism, an air inlet pipe and an airtight generator shell, wherein a horizontal clapboard is arranged in the airtight generator shell, the clapboard divides an airtight cavity in the airtight generator shell into the upper air chamber and the lower air chamber, the valve mechanism is positioned outside the airtight generator shell, a cantilever type air inlet pipe is arranged in the lower air chamber, a plurality of uniform air outlet holes are arranged at intervals on the surface of a pipe body of the air inlet pipe, one end of the air inlet pipe is connected with the valve mechanism fixed outside the airtight generator shell, the valve mechanism is communicated with an air distribution mechanism through an air pipe, a plurality of internal nozzles are arranged at intervals on the top of the clapboard, the internal nozzles are positioned in the upper air chamber, a plurality of bubble nozzles are arranged at intervals on the top of the airtight generator shell, the bubble nozzles are communicated with the outside, a gas one-way exchange film is, the bubble nozzles are positioned above the inner nozzles, and the bubble nozzles and the inner nozzles are arranged oppositely and alternately;
go up the bottom of air chamber and set up the automatically controlled stifled cap that goes up of several along the top interval of baffle, automatically controlled stifled cap that goes up and down is located the bubble nozzle under, and automatically controlled stifled cap that goes up and down includes top spill rubber cap, elastic element and step-by-step elevator motor, and top spill rubber cap passes through elastic element and is connected with step-by-step elevator motor's output.
According to the invention, the front wall plate and the side wall plate are made of transparent acrylic glass, the rear wall plate is made of white acrylic glass, and polyformaldehyde resin shells are arranged on the outer sides of the front wall plate, the side wall plate and the rear wall plate.
The shooting mechanism comprises an LED illuminating lamp, a camera shooting part and a flare imaging part.
The multi-beam echo detection mechanism comprises a forward multi-beam bubble detection mechanism and an upward multi-beam bubble detection mechanism, and the forward multi-beam bubble detection mechanism and the upward multi-beam bubble detection mechanism adopt high-frequency sonar mechanisms.
The valve timing mechanism comprises a flow control valve and a gas delivery switching valve.
The bubble observation and holding mechanism is arranged in a space defined by the front wall plate, the side wall plate and the rear wall plate and used for observing and recording, the bubble observation and holding mechanism is positioned above the bubble generator, and the bubble observation and holding mechanism is fixed between the inner concave part of the front wall plate and the rear wall plate, so that the interference of seawater on observing bubbles can be avoided.
The bubble observation and holding mechanism comprises a high-transmission cylindrical pipe, and the pipe diameters of the left end and the right end of the high-transmission cylindrical pipe are larger than the pipe diameter of the middle part of the high-transmission cylindrical pipe.
The gas valve mechanism is internally provided with a gas valve and a gas type marking part, the gas type marking part comprises a gas sensor, and the gas type marking part comprises a gas sensor. Wherein the gas valve is used for detecting and controlling the flow of the gas flowing into the bubble generator, and the gas type marking part is used for marking the type of the gas flowing into the bubble generator.
The invention has the beneficial effects that:
(1) the device simulates the leakage process of the submarine gas through the bubble generator capable of controlling the quantity and the generation speed of bubbles, the generation process of the bubbles is flexible and controllable, the escape process of different types of submarine gas can be simulated, and the experimental requirements can be met only by carrying out different settings on the gas distribution mechanism;
(2) the concave part is arranged in the middle of the front wall plate, so that the form change of the bubbles in the rising process can be accurately and clearly detected, and the bubbles are detected by utilizing a plurality of detection modes of the shooting mechanism, the multi-beam echo detection mechanism and the bubble observation and holding mechanism, so that the detection efficiency is greatly improved, and the utilization efficiency of the device in operation is also improved;
(3) the device is widely made of acrylic materials, optimized optical configuration is adopted, the whole device is convenient to process and adjust, and the device is simple, easy to use and high in practicability.
Drawings
FIG. 1 is a schematic top view of the present invention;
FIG. 2 is a schematic view of the internal structure of the bubble generator of the present invention;
fig. 3 is a partial enlarged view of the invention at position a in fig. 2.
In the figure: 1, a front wall plate; 2 a side wall panel; 3, a rear wall plate; 4, a shooting mechanism; 5 a multi-beam echo detection mechanism; 51 a forward multi-beam bubble detection mechanism; an upward multibeam bubble detection mechanism at 52; 6 a bubble generator; 61 lower air chamber; 611 an internal nozzle; 62 an upper air chamber; 621 a bubble nozzle; 622 electrically controlled lifting plug cap; 63 an air valve mechanism; 64 air inlet pipes; 65 an airtight generator housing; 7, a valve mechanism; 71 a flow control valve; 8 bubble observation holding mechanism.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1, the seabed gas leakage detection simulation device comprises a shell, a shooting mechanism 4, a multi-beam echo detection mechanism 5, a bubble generator 6 and a gas distribution mechanism 7, wherein the shell comprises a front wall plate 1, a side wall plate 2 and a rear wall plate 3, the front wall plate 1, the side wall plate 2 and the rear wall plate 3 are fixedly connected in a watertight manner, and bottom plates are fixedly connected at the bottoms of the front wall plate 1, the side wall plate 2 and the rear wall plate 3 in a watertight manner. The front wall plate 1 and the side wall plate 2 are made of transparent acrylic glass, the rear wall plate 3 is made of white acrylic glass, and the shooting mechanism 4 is used for shooting, and generated LED light is diffused by the rear wall plate 3. The outer sides of the front wall plate 1, the side wall plates 2 and the rear wall plate 3 of the rear wall plate are all provided with polyformaldehyde resin shells for improving the mechanical property of the shell. The middle part of the front wall plate 1 is provided with an inner concave part, the outer side of the inner concave part is provided with a shooting mechanism 4, the shooting mechanism 4 comprises an LED illuminating lamp, a shooting part and a flare imaging part, in a dark seabed environment, when the shooting mechanism 4 shoots bubbles, the LED illuminating lamp is turned on, the bubbles are like flare under the irradiation of LED light, the flare imaging part images the rising form of the bubbles, and meanwhile, a scale is arranged on a film of the flare imaging part to detect the size of the bubbles, and the form, the size and the rising rate of the bubbles can be shot through the flare imaging part.
The outside of preceding wallboard 1 is equipped with multibeam echo detection mechanism 5, multibeam echo detection mechanism 5 is including preceding multibeam bubble detection mechanism 51 and upward multibeam bubble detection mechanism 52, preceding multibeam bubble detection mechanism 51 and upward multibeam bubble detection mechanism 52 adopt high frequency sonar mechanism, the multibeam sonar bubble that high frequency sonar mechanism produced carries out initiative sonar detection, obtain the acoustic signal of bubble, the acoustic signal that will detect and obtain makes statistics of, establish bubble data model, detect the bubble seepage flux in nature. The forward multi-beam bubble detection mechanism 51 is used for detecting bubbles in the horizontal direction, and the upward multi-beam bubble detection mechanism is used for detecting bubbles in the vertical direction. Through the multi-beam sonar of two directions, make statistics of the acoustic signal of bubble from a plurality of directions, improve the information content of the bubble acoustic signal of bubble data model, improve the detection result of the bubble permeation flux in later stage.
The bottom plate is provided with a bubble generator 6, the bubble generator 6 is connected with a gas distribution mechanism 7, and the gas distribution mechanism is used for gas supply. The valve gear 7 includes a flow control valve 71 and a gas delivery switching valve.
A bubble observation holding mechanism 8 for observing and recording is arranged in a space enclosed by the front wall plate 1, the side wall plate 2 and the rear wall plate 3, and the bubble observation holding mechanism 8 is positioned above the bubble generator 6. In this embodiment, the bubble observation holding mechanism 8 is fixed between the concave portion of the front wall plate 1 and the rear wall plate 3, and interference of seawater to observation of bubbles can be avoided. The bubble observation holding mechanism 8 comprises a high-transmission cylindrical pipe, the pipe diameters of the left end and the right end of the high-transmission cylindrical pipe are larger than the pipe diameter of the middle part, the purpose is to reduce the influence on the bubbles, the bubbles can easily enter and leave the bubble observation holding mechanism 8 without being damaged, and a working area and a transition area can be distinguished, the high-transmission cylindrical pipe is arranged for observing the rising state of the bubbles, the mutual influence between the bubbles and the bubbles is avoided, a specified movement space is reserved for the bubbles, the rising state and the rising rate of the bubbles can be conveniently counted and recorded, and meanwhile, the detection precision of various detection devices is improved in a doubling mode. The high-transparent cylindrical pipe is a detachable assembly, and the high-transparent cylindrical pipes with different inner diameters can be replaced in the using process so as to adapt to the observation and the recording of bubbles with different types and sizes.
As shown in fig. 2 and 3, the bubble generator 6 includes an upper air chamber 62, a lower air chamber 61, an air valve mechanism 63, an air inlet pipe 64 and an airtight generator casing 65, a horizontal partition is provided in the airtight generator casing 65, the partition divides a sealed cavity in the airtight generator casing 65 into the upper air chamber 62 and the lower air chamber 61, the air valve mechanism 63 is located outside the airtight generator casing 65, a cantilever-type air inlet pipe 64 is provided in the lower air chamber 61, a plurality of uniform air outlets are provided on a surface of a pipe body of the air inlet pipe 64, one end of the air inlet pipe 64 is connected to the air valve mechanism 63 fixed outside the airtight generator casing, and the air valve mechanism 63 is communicated with the air distribution mechanism 7 through an air pipe. The top of the partition board is provided with a plurality of inner nozzles 611 at intervals, the inner nozzles 611 are positioned in the upper air chamber 62, the inner nozzles 611 realize the communication between the upper air chamber 62 and the lower air chamber 61, and the air enters the lower air chamber 61 along the air inlet pipe 64 and then enters the upper air chamber 62 along the inner nozzles 611. The top of the airtight generator housing 65 is provided with a plurality of bubble nozzles 621 at intervals, the bubble nozzles 621 are communicated with the outside, and the top of the bubble nozzles 621 is provided with a gas one-way exchange film, so as to ensure that gas can only be discharged from the bubble generator 6, and external gas cannot enter the bubble generator 6 through the bubble nozzles 621. The bottom of the bubble nozzle 621 is located in the upper air chamber 62. The bubble nozzle 621 is located above the inner nozzle 611, and the bubble nozzle 621 and the inner nozzle 611 are disposed in a staggered manner.
Meanwhile, the bottom of the upper air chamber 62, namely the top of the partition plate, is provided with a plurality of electrically controlled lifting plug caps 622 at intervals, the electrically controlled lifting plug caps 622 are located right below the bubble nozzles 621, the electrically controlled lifting plug caps 622 comprise top concave rubber caps, elastic elements and stepping lifting motors, and the top concave rubber caps are connected with the output ends of the stepping lifting motors through the elastic elements. The gas valve mechanism 63 is internally provided with a gas valve for detecting and controlling the flow rate of the gas flowing into the bubble generator 6, and a gas type flag portion including a gas sensor such as a methane sensor, a hydrogen sulfide sensor, a carbon dioxide sensor, etc. for identifying the gas flowing into the gas generator 6 by the gas sensor, thereby determining the type of the leaking gas.
In practical use, the front wall plate 1, the side wall plate 2, the rear wall plate 3 and the bottom plate form a watertight space, a proper amount of seawater is added into the watertight space, an experimenter can be connected with the gas distribution mechanism 7 through external gas supply equipment, for example, if the gas to be detected is methane, the methane gas supply equipment is switched on, the methane gas realizes the control process of the total flow through the flow control valve 71, the methane gas flowing into the bubble generator 6 through the pipeline sequentially passes through the gas inlet pipe 64, the lower gas chamber 61, the internal nozzle 611, the upper gas chamber 62 and the bubble nozzle 621, and finally the methane gas escapes to the external space through the gas one-way exchange film at the top of the bubble nozzle 621, so that the submarine gas escape and leakage process. In the experimental process, the bubble generator 6 comprises the upper air chamber 62 and the lower air chamber 61, and the plurality of bubble nozzles 621 and the inner nozzles 611 interact with each other, so that bubbles are uniformly generated, and the bottom of the bubble nozzles 621 can be blocked by controlling the action of the electric control lifting blocking cap 622, so that the number of the bubble nozzles 621 capable of generating bubbles can be flexibly set, and the process of releasing bubbles at different intervals in different spaces on the seabed can be simulated. The experimenter can also adjust the flow rate of the gas by controlling the gas valve mechanism 63, thereby adjusting the generation rate of bubbles and achieving the purpose of flexible control. The bubbles gradually rise in the seawater and gradually enter the bubble observation and holding mechanism 8, in the whole process of bubble rising, the multi-beam echo detection mechanism 5 detects and records the process and the state of the bubbles, the forward multi-beam bubble detection mechanism 51 is used for detecting the bubbles in the horizontal direction, the upward multi-beam bubble detection mechanism 52 is used for detecting the bubbles in the vertical direction to obtain the acoustic information data, and the shooting mechanism 4 images the behavior of the bubbles to obtain the form, the size and the rising rate of the bubbles.
The seabed gas leakage detection simulation device provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The utility model provides a submarine gas leakage detection analogue means, includes the casing, its characterized in that: the shell comprises a front wall plate (1), a side wall plate (2) and a rear wall plate (3), the front wall plate (1), the side wall plate (2) and the rear wall plate (3) are in watertight fixed connection, the bottoms of the front wall plate (1), the side wall plate (2) and the rear wall plate (3) are all in watertight fixed connection with a bottom plate, the middle of the front wall plate (1) is provided with an inner concave part, the outer side of the inner concave part is provided with the shooting mechanism (4), the outer side of the front wall plate (1) is provided with the multi-beam echo detection mechanism (5), the bottom plate is provided with the bubble generator (6), and the bubble generator (6) is connected with the gas distribution mechanism (7);
the bubble generator (6) comprises an upper air chamber (62), a lower air chamber (61), an air valve mechanism (63), an air inlet pipe (64) and an airtight generator shell (65), a horizontal partition plate is arranged in the airtight generator shell (65), a closed cavity in the airtight generator shell (65) is divided into the upper air chamber (62) and the lower air chamber (61) by the partition plate, the air valve mechanism (63) is positioned outside the airtight generator shell (65), a cantilever type air inlet pipe (64) is arranged in the lower air chamber (61), a plurality of uniform air outlet holes are formed in the surface of a pipe body of the air inlet pipe (64) at intervals, one end of the air inlet pipe (64) is connected with the air valve mechanism (63) fixed outside the airtight generator shell, the air valve mechanism (63) is communicated with an air distribution mechanism (7) through an air pipe, a plurality of internal nozzles (611) are arranged at intervals at the top of the partition plate, the internal nozzles (611) are, the top of the airtight generator shell (65) is provided with a plurality of bubble nozzles (621) at intervals, the bubble nozzles (621) are communicated with the outside, the top of the bubble nozzles (621) is provided with a gas one-way exchange film, the bottom of the bubble nozzles (621) is positioned in the upper air chamber (62), the bubble nozzles (621) are positioned above the inner nozzles (611), and the bubble nozzles (621) and the inner nozzles (611) are arranged oppositely and alternately at intervals;
go up the bottom of air chamber (62) and set up the automatically controlled stifled cap of going up and down (622) of several along the top interval of baffle, automatically controlled stifled cap of going up and down (622) is located bubble nozzle (621) under, and automatically controlled stifled cap of going up and down (622) includes top spill rubber cap, elastic element and step-by-step lift motor, and top spill rubber cap passes through elastic element and is connected with step-by-step lift motor's output.
2. The subsea gas leak detection simulation apparatus of claim 1, wherein: preceding wallboard (1) and side wall board (2) adopt transparent ya keli glass to make, and back wallboard (3) adopt white ya keli glass to make, and the outside of preceding wallboard (1), side wall board (2) and back wallboard (3) all is equipped with the polyformaldehyde resin shell.
3. The subsea gas leak detection simulation apparatus of claim 1, wherein: the shooting mechanism (4) comprises an LED illuminating lamp, a shooting part and a flare imaging part.
4. The subsea gas leak detection simulation apparatus of claim 1, wherein: the multi-beam echo detection mechanism (5) comprises a forward multi-beam bubble detection mechanism (51) and an upward multi-beam bubble detection mechanism (52), and the forward multi-beam bubble detection mechanism (51) and the upward multi-beam bubble detection mechanism (52) adopt high-frequency sonar mechanisms.
5. The subsea gas leak detection simulation apparatus of claim 1, wherein: the valve mechanism (7) comprises a flow control valve (71) and a gas delivery switching valve.
6. The subsea gas leak detection simulation apparatus of claim 1, wherein: the bubble observation and holding mechanism (8) for observing and recording is arranged in a space surrounded by the front wall plate (1), the side wall plate (2) and the rear wall plate (3), the bubble observation and holding mechanism (8) is positioned above the bubble generator (6), and the bubble observation and holding mechanism (8) is fixed between the inward concave part of the front wall plate (1) and the rear wall plate (3).
7. The subsea gas leak detection simulation apparatus of claim 6, wherein: the bubble observation and holding mechanism (8) comprises a high-transmission cylindrical pipe, and the pipe diameters of the left end and the right end of the high-transmission cylindrical pipe are larger than the pipe diameter of the middle part of the high-transmission cylindrical pipe.
8. The subsea gas leak detection simulation apparatus of claim 1, wherein: and a gas valve and a gas type marking part are arranged in the gas valve mechanism (63), and the gas type marking part comprises a gas sensor.
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| CN202010497178.7A CN111879474B (en) | 2020-06-04 | 2020-06-04 | Seabed gas leakage detection simulation device |
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| CN113916888A (en) * | 2021-10-19 | 2022-01-11 | 中国科学院南海海洋研究所 | Video acquisition system for in-situ measurement of leaked methane bubble flux of seabed cold spring |
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