CN108897063B - Submarine bubble generation simulation device - Google Patents
Submarine bubble generation simulation device Download PDFInfo
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- CN108897063B CN108897063B CN201810901599.4A CN201810901599A CN108897063B CN 108897063 B CN108897063 B CN 108897063B CN 201810901599 A CN201810901599 A CN 201810901599A CN 108897063 B CN108897063 B CN 108897063B
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- floating body
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- 238000004088 simulation Methods 0.000 title claims abstract description 17
- 239000004576 sand Substances 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 230000005484 gravity Effects 0.000 claims description 6
- 239000004215 Carbon black (E152) Substances 0.000 claims description 5
- 229930195733 hydrocarbon Natural products 0.000 claims description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims description 4
- 238000012806 monitoring device Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 10
- 238000011161 development Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 150000004677 hydrates Chemical class 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 10
- 239000010410 layer Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000011835 investigation Methods 0.000 description 4
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
Abstract
The invention provides a submarine bubble generation simulation device, which comprises an air supply device, a bubble generator, a floating body, an acoustic releaser and a balancing weight; the bubble generator comprises an exhaust nozzle, a conical container is connected below the exhaust nozzle, sand gravel is filled in the conical container, a straight pipe is arranged at the tail part of the conical container, and the straight pipe is connected with a high-pressure air pipe; the floating body comprises a first floating body and a second floating body, the first floating body is arranged in a triangular bracket, the triangular bracket comprises an upper layer plate and a lower layer plate, a space for accommodating the first floating body is formed between the upper layer plate and the lower layer plate, a bubble generator is fixedly arranged on the upper layer plate, and monitoring equipment is arranged above the bubble generator; the bottom of the triangular bracket is connected with the acoustic releaser and the balancing weight through a cable, a second floating body and a hanging ring are arranged on the cable, and two ends of the hanging ring are respectively arranged on two sides of the second floating body. The simulation device can simulate the submarine overflow gas in a natural state and promote the development of detection technologies such as submarine hydrates.
Description
Technical Field
The invention belongs to the technical field of marine exploration, and particularly relates to a submarine bubble generation simulation device.
Background
The natural gas hydrate is a novel potential energy source, is an optimal substitute clean energy source after petroleum and natural gas, and is mainly distributed in submarine sediments and land permanent frozen soil zones. Under the action of crust power, the inside of the crust of the natural gas hydrate moves upwards, and the natural gas hydrate passes through a seabed sediment layer through a migration channel such as a gap, a crack or a fault and enters the sea water in a seepage or gushing mode to form a seabed bubble plume, wherein the seabed bubble plume is often found in the seawater covered on a hydrate storage area and is an important mark for identifying the natural gas hydrate. The multi-beam depth sounder, the shallow stratum profiler, the side-scan sonar and other equipment can detect, and the submarine leaked hydrate gas in the real environment often exists in a small punctiform range, so that the submarine leaked hydrate gas is difficult to find through investigation. In order to research from known to unknown, the simulated submarine bubble plume is utilized to carry out test comparison and test, thereby being beneficial to improving the submarine hydrate leakage identification precision and the submarine hydrate detection accuracy, meeting the test requirements of related detection instruments, providing a simulated bubble generating device, being also applicable to a marine test field and providing a submarine bubble source for testing, improving and improving the detection performance of instruments and equipment. The chinese patent application No. 201720105376.8 discloses a seabed air curtain generator, but the device cannot be fixed on the seabed and can not simulate different seabed bubbles and seabed plumes under different marine environments and geological conditions.
Disclosure of Invention
Aiming at the problem that a device for simulating the seabed bubbles in a real seabed environment does not exist in the prior art, the invention provides a seabed bubble generation simulation device which can simulate the generation of the seabed bubbles in the real seabed environment and promote the development of detection technologies such as seabed hydrate and the like.
The invention is realized by the following technical scheme:
a submarine bubble generation simulation device comprises an air supply device, a bubble generator, a floating body, an acoustic releaser and a balancing weight;
the air supply device comprises a high-pressure air storage tank, a pressure reducing valve and a high-pressure air pipe which are connected in sequence;
the bubble generator comprises an exhaust nozzle, a conical container is connected below the exhaust nozzle, sand gravel is filled in the conical container, a straight pipe is arranged at the tail part of the conical container, and the straight pipe is connected with a high-pressure air pipe;
the floating body comprises a first floating body and a second floating body, the first floating body is arranged in a triangular bracket, the triangular bracket comprises an upper layer plate and a lower layer plate, a space for accommodating the first floating body is formed between the upper layer plate and the lower layer plate, a bubble generator is fixedly arranged on the upper layer plate, and monitoring equipment is arranged above the bubble generator; the bottom of the triangular bracket is connected with an acoustic releaser through a cable, a second floating body and a hanging ring are arranged on the cable, and two ends of the hanging ring are respectively arranged at two sides of the second floating body;
the balancing weight is connected below the acoustic releaser.
Further, a plurality of exhaust holes are formed in the exhaust nozzle, and the exhaust holes are irregularly arranged.
Furthermore, the submarine bubble generation simulation device is provided with a positioning beacon, and the positioning beacon is arranged on the tripod.
Further, the monitoring device is a flow rate sensor, a pressure sensor, an image pickup device or a hydrocarbon gas sensor, etc., and can be selected according to actual needs.
Compared with the prior art, the invention has the following beneficial effects:
the seabed bubble generating device can be accurately sunk near the seabed of a preset sea area, the release of bubble airflow from the offshore seabed is simulated, and the air is upwards diffused through the gravel layer to form small-area leakage exposure through the bottom funnel-shaped exhaust device, so that the seabed bubble generating effect is similar to that of a true seabed plume. The device can continuously and stably generate bubbles, the form of the bubbles is controllable, the bubbles can be monitored, and the bubbles can be recovered, so that the device can be reused. The system can provide a known air source for submarine shallow air detection, submarine hydrate leakage detection, submarine cold spring detection, submarine pipeline leakage, submarine plume and submarine hydrate resource investigation, provide test and comparison data for relevant marine investigation equipment, and serve for marine environmental effect evaluation and marine resource investigation.
Drawings
FIG. 1 is a schematic diagram of a device for simulating generation of bubbles at the bottom of a sea in example 1;
fig. 2 is a schematic structural view of the air supply device of embodiment 1;
FIG. 3 is a schematic diagram showing the structure of a bubble generator according to example 1;
fig. 4 is a schematic structural view of the tripod of the embodiment 1;
fig. 5 is a schematic diagram showing the structure of a subsea bubble generation simulation device according to example 2.
In the figure: 1-ship, 2-air feeder, 21-high pressure air storage tank, 22-relief valve, 3-high pressure air pipe, 4-tripod and monitoring equipment, 41-tripod, 42-fixed ring, 43-cutting sleeve joint, 44-positioning beacon, 45-searchlight, 46-camera, 47-bubble generator, 471-sand gravel cone-shaped container, 472-exhaust nozzle, 473-sand gravel packing layer, 48-hydrocarbon content detector, 49-steel pipe, 5-first floating body, 6-hanging ring, 7-second floating body, 8-acoustic releaser, 9-balancing weight, 10-sea surface, 11-seabed.
Detailed Description
The invention will be described in further detail with reference to specific embodiments and drawings.
Example 1
The embodiment provides a submarine bubble generation simulation device, which comprises an air supply device 2, a bubble generator 47, a first floating body 5, a second floating body 7, a triangular bracket 41, an acoustic releaser 8 and a balancing weight 9, wherein the air supply device 2 is connected with the bubble generator 47, the first floating body 5 is arranged in the triangular bracket 41, and the second floating body 7, the acoustic releaser 8 and the balancing weight 9 are sequentially connected.
The air supply device 2 is water equipment and supplies air, and as shown in fig. 2, comprises a high-pressure air storage tank 21, a pressure reducing valve 22 and a high-pressure air pipe 3 which are connected in sequence. The high-pressure gas storage tank 21 stores high-pressure gas, and the pressure reducing valve 22 is installed at the outlet of the high-pressure gas storage tank 2, and the pressure of the gas higher in front of the valve can be reduced to a level required by a pipeline behind the valve by regulating the pressure reducing valve.
The other equipment than the air supply device 2 is underwater equipment.
As shown in fig. 3, the bubble generator 47 includes a shower-like exhaust nozzle 472, a conical container 471 is connected below the exhaust nozzle 472, sand gravel 473 is filled in the conical container, a corrosion-resistant steel pipe 49 is provided at the tail of the exhaust nozzle, and the steel pipe 49 is connected to the high-pressure gas pipe 3. The exhaust nozzle 472 is provided with a single hole or a plurality of holes. When a plurality of vent holes are provided, it is preferable that the vent holes are arranged in an irregular form. The gas enters the gravel layer from the high-pressure gas pipe, is discharged from the exhaust nozzle, and simulates the leakage condition of bubbles from the seabed surface layer. The exhaust nozzle 472 is detachably and fixedly connected with the conical container 471, so that the sand gravel can be conveniently replaced.
In order to fix the position of the underwater equipment relatively, a floating body is arranged on the simulation device. The floating body comprises a first floating body 5 and a second floating body 7, the first floating body 5 being arranged in a tripod 41. As shown in fig. 4, the tripod 41 includes an upper plate, a lower plate and three connecting rods, a space for accommodating the first floating body is formed between the upper plate and the lower plate, and a bubble generator clamping position is provided on the upper plate for fixedly arranging the bubble generator. A searchlight 45, a camera 46, a positioning beacon 44 and a hydrocarbon content detection sensor 48 are respectively arranged on the connecting rod above the bubble generator. The three legs of the tripod 41 are provided with fixing rings 42 for mooring the ropes. As shown in fig. 1, an acoustic releaser 8 is connected to the cable, the acoustic releaser 8 is connected to a counterweight 9, and after the acoustic releaser 8 receives a release instruction, the cement counterweight can be unhooked and released. The mooring rope is provided with a second floating body 7 and a hanging ring 6, and two ends of the hanging ring 6 are respectively arranged at two sides of the second floating body 7.
The first floating body 5 is hollow and inflatable, and plays a role in upward buoyancy, and the buoyancy is greater than the gravity of the bubble generating device 47, the tripod and the monitoring device 4. The second floating body 7 is also of a hollow structure, and the generated buoyancy is larger than the gravity of the acoustic releaser 8 and the cable and the accessory equipment thereof and smaller than the gravity of the balancing weight 9. When in operation, the balancing weight 9 and the two floating bodies jointly act, so that the bubble generating device can be stably sunk in a fixed area of the sea. When the equipment is recovered, the equipment floats to the water surface smoothly under the drive of the floating body.
The simulator provided in this embodiment needs to carry a ship or a platform for work, requires a working water depth of more than 30m, berths after the ship reaches a predetermined sea area, is connected with an underwater device, is connected with a deck device after the underwater device is connected, is connected with a high-pressure air pipe and a high-pressure air storage tank, is fixed with a deck end towing rope, is immersed into a predetermined seabed area after the system connection is completed, and is released in sea water through a pressure reducing valve, an air pipe, a gravel layer and an exhaust hole, bubbles or air flows are slowly generated, and monitoring devices such as an attached pressure, a ocean current and a hydrocarbon content detection sensor collect corresponding data.
Example 2
The present embodiment provides another submarine bubble generation simulation device, which is different from embodiment 1 in that the air supply device 2 is arranged under water, and as shown in fig. 5, the high-pressure air storage tank 21 is a mounted air cylinder and is arranged on a cable above the second floating body 7. The simulation does not need to work on a ship or a platform, so that the operation is simpler and the application range is wider. After the test is completed, the deck sonar controller sends a release instruction, the acoustic releaser releases the cement balancing weight, the underwater equipment floats out of the water surface under the buoyancy effect, and the personnel on the back deck on the ship recover the underwater equipment.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (3)
1. The submarine bubble generation simulation device is characterized by comprising an air supply device, a bubble generator, a floating body, an acoustic releaser and a balancing weight;
the air supply device comprises a high-pressure air storage tank, a pressure reducing valve and a high-pressure air pipe which are connected in sequence;
the bubble generator comprises an exhaust nozzle, a conical container is connected below the exhaust nozzle, sand gravel is filled in the conical container, a straight pipe is arranged at the tail part of the conical container, and the straight pipe is connected with a high-pressure air pipe; the exhaust nozzle is provided with a plurality of exhaust holes which are arranged randomly;
the floating body comprises a first floating body and a second floating body, the first floating body is arranged in a triangular bracket, the triangular bracket comprises an upper layer plate and a lower layer plate, a space for accommodating the first floating body is formed between the upper layer plate and the lower layer plate, a bubble generator is fixedly arranged on the upper layer plate, and monitoring equipment is arranged above the bubble generator; the bottom of the triangular bracket is connected with an acoustic releaser through a cable, a second floating body and a hanging ring are arranged on the cable, and two ends of the hanging ring are respectively arranged at two sides of the second floating body;
the lower part of the acoustic releaser is connected with a balancing weight;
the first floating body is hollow and inflatable, plays a role in upward buoyancy, and the buoyancy is greater than the gravity of the bubble generator, the triangular bracket and the monitoring equipment; the second floating body is also of a hollow structure, and the generated buoyancy is larger than the gravity of the acoustic releaser, the mooring rope and accessory equipment thereof and smaller than the gravity of the balancing weight; when the device works, the balancing weight and the two floating bodies jointly act, so that the bubble generator can be stably sunk in a fixed area of the seabed.
2. The subsea bubble generation simulation device according to claim 1, wherein a positioning beacon is mounted on the subsea bubble generation simulation device, the positioning beacon being provided on an tripod.
3. The subsea bubble generation simulation apparatus according to claim 1, wherein the monitoring device is a flow rate sensor, a pressure sensor or a hydrocarbon gas sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810901599.4A CN108897063B (en) | 2018-08-09 | 2018-08-09 | Submarine bubble generation simulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810901599.4A CN108897063B (en) | 2018-08-09 | 2018-08-09 | Submarine bubble generation simulation device |
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| Publication Number | Publication Date |
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| CN108897063A CN108897063A (en) | 2018-11-27 |
| CN108897063B true CN108897063B (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810901599.4A Active CN108897063B (en) | 2018-08-09 | 2018-08-09 | Submarine bubble generation simulation device |
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| CN109900177B (en) * | 2019-03-25 | 2021-04-20 | 哈尔滨工程大学 | Air gun device for underwater high-pressure gas ice breaking experiment |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1562699A (en) * | 2004-03-22 | 2005-01-12 | 中国海洋大学 | Observation platform in deep-sea bed |
| CN103440813A (en) * | 2013-09-02 | 2013-12-11 | 杭州电子科技大学 | Simulated deep sea comprehensive experiment table provided with bubble generator and use method thereof |
| CN104949903A (en) * | 2015-07-01 | 2015-09-30 | 中国矿业大学 | Test device and method for simulating uniform diffusion of CO2 in soil |
| CN105738951A (en) * | 2016-05-06 | 2016-07-06 | 广州海洋地质调查局 | Multi-node OBS vertical cable earthquake collection system |
| KR20160104971A (en) * | 2015-02-27 | 2016-09-06 | 대우조선해양 주식회사 | Mud storage system having bubble generation function |
| CN205562141U (en) * | 2016-04-21 | 2016-09-07 | 上海石油天然气有限公司 | Simulation seabed contains shallow layer fate and moves physical model of law |
| CN106932170A (en) * | 2017-04-05 | 2017-07-07 | 青岛海洋地质研究所 | The test method and device of hydrate layer output fine sand migration rule in gravel layer |
| CN108267126A (en) * | 2018-01-22 | 2018-07-10 | 中国海洋大学 | Wave is to the observation system and method for bottom sediment settling flux amount in deep-sea |
| CN108346360A (en) * | 2017-01-23 | 2018-07-31 | 天津开发区兴衡石油机械配件有限公司 | A kind of seabed air curtain generator |
| CN208506286U (en) * | 2018-08-09 | 2019-02-15 | 青岛海洋地质研究所 | A kind of seabed bubble generation simulator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110315233A1 (en) * | 2010-06-25 | 2011-12-29 | George Carter | Universal Subsea Oil Containment System and Method |
-
2018
- 2018-08-09 CN CN201810901599.4A patent/CN108897063B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1562699A (en) * | 2004-03-22 | 2005-01-12 | 中国海洋大学 | Observation platform in deep-sea bed |
| CN103440813A (en) * | 2013-09-02 | 2013-12-11 | 杭州电子科技大学 | Simulated deep sea comprehensive experiment table provided with bubble generator and use method thereof |
| KR20160104971A (en) * | 2015-02-27 | 2016-09-06 | 대우조선해양 주식회사 | Mud storage system having bubble generation function |
| CN104949903A (en) * | 2015-07-01 | 2015-09-30 | 中国矿业大学 | Test device and method for simulating uniform diffusion of CO2 in soil |
| CN205562141U (en) * | 2016-04-21 | 2016-09-07 | 上海石油天然气有限公司 | Simulation seabed contains shallow layer fate and moves physical model of law |
| CN105738951A (en) * | 2016-05-06 | 2016-07-06 | 广州海洋地质调查局 | Multi-node OBS vertical cable earthquake collection system |
| CN108346360A (en) * | 2017-01-23 | 2018-07-31 | 天津开发区兴衡石油机械配件有限公司 | A kind of seabed air curtain generator |
| CN106932170A (en) * | 2017-04-05 | 2017-07-07 | 青岛海洋地质研究所 | The test method and device of hydrate layer output fine sand migration rule in gravel layer |
| CN108267126A (en) * | 2018-01-22 | 2018-07-10 | 中国海洋大学 | Wave is to the observation system and method for bottom sediment settling flux amount in deep-sea |
| CN208506286U (en) * | 2018-08-09 | 2019-02-15 | 青岛海洋地质研究所 | A kind of seabed bubble generation simulator |
Non-Patent Citations (1)
| Title |
|---|
| 模拟渗漏系统气体迁移与水合物形成实验;关进安 等;现代地质;第22卷(第3期);第458-460、463页 * |
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