CN107817131B - Deep sea water and dissolved gas collecting device and method - Google Patents
Deep sea water and dissolved gas collecting device and method Download PDFInfo
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- CN107817131B CN107817131B CN201711084697.5A CN201711084697A CN107817131B CN 107817131 B CN107817131 B CN 107817131B CN 201711084697 A CN201711084697 A CN 201711084697A CN 107817131 B CN107817131 B CN 107817131B
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- 239000013535 sea water Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 104
- 238000003860 storage Methods 0.000 claims abstract description 82
- 238000005070 sampling Methods 0.000 claims abstract description 59
- -1 polytetrafluoroethylene Polymers 0.000 claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- 238000007872 degassing Methods 0.000 claims description 4
- 238000003306 harvesting Methods 0.000 claims 2
- 230000008569 process Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 43
- 238000007789 sealing Methods 0.000 description 13
- 238000000605 extraction Methods 0.000 description 8
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- 238000007906 compression Methods 0.000 description 6
- 238000011835 investigation Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 108010066057 cabin-1 Proteins 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
- 238000013461 design Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N2001/1087—Categories of sampling
- G01N2001/1093—Composite sampling; Cumulative sampling
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
- G01N2001/1418—Depression, aspiration
- G01N2001/1427—Positive displacement, piston, peristaltic
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a deep sea water and dissolved gas collecting device and method, wherein a gas/water collecting channel, a vacuum valve and an overflow hole are arranged on a sampling bottle, a gas/water collecting inlet and an electromagnetic valve are arranged at one end of a high-pressure sealed cabin body, which is communicated with a high-pressure sealed cabin, of the sampling bottle, a sample storage cabin is subjected to negative pressure treatment in advance, so that a sample is collected, and the sample rapidly enters the sampling bottle through the gas/water collecting inlet and the opened electromagnetic valve through the gas/water collecting channel, and the collection is completed. In the process of extracting the sample from the collecting device, the volume of the sample storage bin is changed through the automatic movement of the balance piston, so that the pressure in the sample storage bin is changed to maintain the balance of the internal pressure and the external pressure of the sample storage bin, and the safety pressure relief and retrieval of the collecting device are ensured. After the collection device is retracted, the collection device is connected with the degasser through the vacuum valve, the water-collecting dissolved gas is received, and then the water body sample is collected through the vacuum valve, so that the complete sampling is realized.
Description
Technical Field
The invention belongs to the technical field of ocean exploration equipment, and particularly relates to a deep sea water and dissolved gas collecting device and method.
Background
The deep sea water collecting device mainly comprises two main types of self-locking flip cover water collecting bottles and negative pressure extraction type in-situ airtight water collecting bottles, and some types which are changed on the basis of the two types. The main structure of the self-locking flip water sampling bottle comprises a water sampling barrel, spherical covers, a releaser, a fixing frame, a steel wire rope groove, a control system and the like, wherein the water sampling bottle is kept open according to the pressure self-adaptive balance principle when the water sampling bottle is lowered, after reaching a preset water sampling depth, the water sampling bottle is controlled to be opened and closed through a pressure switch element, a cable and the like, so that the two spherical covers at the two ends of the water sampling barrel are closed, and then the seawater in the cylinder is preserved. The water collecting bottle can be provided with a plurality of water collecting bottles each time to form a multiple seawater collecting system, and the water collecting bottle is characterized in that the whole volume of the device is larger, the water collecting amount is more, generally 2-8 liters and the operation is simpler, but because the water collecting bottle adopts an elastic rope sealing structure, the water collecting bottle is difficult to store water-soluble gas remained in seawater, and meanwhile, the water collecting of the water collecting bottle also needs to be realized by assistance of a CTD collecting system, a deck power supply system, a deck control system, a transmission system and the like.
The other kind adopts the water bottle to be the airtight water bottle of negative pressure extraction formula normal position, this kind adopts water bottle main part structure to include extracting piston, buffering piston, the working chamber, the gas vent, external pressure mouth, the water storage chamber, water inlet, delivery port etc. several parts, adopt water bottle main part material is the stainless steel, according to negative pressure extraction principle, the working chamber is full of water in advance, extracting piston keeps balanced seal, when the water sampler descends to the predetermined depth of water that adopts, negative pressure storehouse in the water system is opened, the rivers of preassembling in the working chamber are to negative pressure storehouse, balanced piston removes to the working chamber direction simultaneously, sample storage storehouse simultaneously appears the negative pressure, external sea water is along with the removal of piston according to the negative pressure extraction principle at this moment, when the water of preassembling in the working chamber is flowed completely, the balanced piston has filled with sea water in the sample storage storehouse, sea water in the sample storage storehouse just can be preserved. The water bottle has the characteristics of complex operation, unstable system operation and less water yield. Before each water collection, the working cavity is filled with water through the pressure pump in advance, and the water collection system can be realized by using a plurality of components such as a hyperbaric chamber, a power supply, an underwater computer, a control system, preset software, a negative pressure barrel, a balance bin, a connecting structure and the like to form the water collection system, wherein the water collection amount is 200ml.
The existing self-locking flip water sampling bottle has larger volume, is suitable for the collection of layered seawater at a plurality of layers, and can be simultaneously installed by means of a control system and a hanger frame of a thermal salt depth meter (CTD) for detecting the temperature, the salinity, the depth and other information of the seawater, but the water sampling bottle adopts an elastic rope sealing structure, is difficult to completely store water-soluble gas remained in the seawater, and is mainly applied to marine regional geological investigation and marine environment investigation which are not related to the content of gas components in water injection and have larger water sample requirements. The water bottle is unsuitable for projects such as resource investigation or scientific investigation which are particularly focused on the gas content in water and do not require particularly much water.
The negative pressure extraction type in-situ airtight water sampling bottle has a relatively complex structure, the water sampling bottle also needs a collecting system composed of a plurality of components such as a high-pressure cabin, a power supply, an underwater computer, a control system, preset software, a negative pressure barrel, a balance cabin, a connecting structure and the like, and can realize airtight collection of seawater.
To sum up, the existing type of water collection bottles have the following disadvantages: 1) The operation steps are complicated, and the method is not suitable for on-site shipborne use; 2) The volume is too large, and carrying and use are not utilized; 3) The water-soluble gas remained in the seawater is difficult to be stored; 4) Requiring professional operations.
Disclosure of Invention
The invention aims to provide a deep sea water and dissolved gas collecting device and method, which can realize safe and rapid collection and airtight preservation of water-soluble gas and water in a collecting area, and the collecting equipment has small volume and convenient operation.
In order to achieve the above purpose, the specific technical scheme of the invention is as follows:
A deep sea water and dissolved gas collecting device comprises a high-pressure sealed cabin and a sampling bottle; the sampling bottle comprises a closed shell and an internal sample storage bin, the tail end of the sample storage bin is provided with a balance piston, the side wall of a cavity where the balance piston is arranged is provided with an overflow hole communicated with the balance piston, and the side wall of the sample storage bin is provided with a vacuum valve communicated with the outside;
The high-pressure sealed cabin comprises a high-pressure sealed cabin body, a transformer, a circuit board and an electromagnetic valve, wherein the transformer is arranged at the tail end of the high-pressure sealed cabin body, one side of the transformer is provided with a circuit board fixing frame, the circuit board is arranged on the circuit board fixing frame, the electromagnetic valve is arranged at the other end of the high-pressure sealed cabin body, a limiting ring for limiting the electromagnetic valve is arranged between the electromagnetic valve and the circuit board fixing frame, and the tail end of the high-pressure sealed cabin body is provided with a watertight connector;
the inlet end of the sample storage bin is provided with an air/water collection channel communicated with the inner cavity of the sample storage bin, and a one-way valve is arranged in the air/water collection channel; the electromagnetic valve is communicated with the gas/water collecting channel and then is communicated with the sample storage bin;
A threaded connector is arranged at one end of the high-pressure sealed cabin body connected with the sampling bottle, and a closed shell of the sampling bottle is connected with the high-pressure sealed cabin body through the threaded connector; the closed shell of the sampling bottle is provided with an air/water collecting inlet, one end of the air/water collecting inlet is communicated with the outside, and the other end of the air/water collecting inlet is communicated with the electromagnetic valve;
the tail ends of the sampling bottle and the high-pressure sealed cabin body are sealed.
Further, the vacuum valve comprises two vacuum valves which are respectively arranged at two sides of the side wall of the sample storage bin.
Further, the sample storage bin and the piston are sealed by adopting an O-shaped ring coated by polytetrafluoroethylene.
Further, the balance piston includes a spring compression spring and a piston body, the spring compression spring being located between the piston body and the end of the closure housing.
The invention also provides a method for collecting the deep sea water and the dissolved gas by using the device, which comprises the following steps:
a. the circuit system of the acquisition device is communicated with a shipborne power supply through a high-voltage watertight cable;
b. connecting the collection device with a shipborne vacuum pump through the vacuum valve, and vacuumizing the sample storage bin;
c. Lowering the acquisition device to a designated horizon depth of an acquisition area by utilizing a shipborne carrying facility;
d. The electromagnetic valve is controlled to be opened through a deck circuit, seawater outside the sampling bottle enters the sample storage bin from the gas/water collecting inlet through the electromagnetic valve, after the preset time is collected, the electromagnetic valve is closed, a collected sample is stored in the sample storage bin, and the collection is completed;
e. lifting the collecting device from the collecting area, automatically moving the balance piston due to pressure difference and elasticity of the pressure spring, and changing the volume of the sample storage bin to maintain balance of the internal pressure and the external pressure of the sample storage bin;
f. After the device is lifted to a cabin deck, the device is connected with a degassing device through the vacuum valve, samples in the sample storage bin are respectively collected, and a water-soluble gas sample and a water body sample are sequentially obtained.
Further, in the step d, the preset collection time is 2-3 minutes.
The invention provides a deep sea water and dissolved gas collecting device and method. Carrying out negative pressure treatment on a sample storage bin in advance through a vacuum valve, and collecting samples according to the principle of lowest energy during sampling; the sample can enter the sampling bottle through the air/water collecting inlet, the opened electromagnetic valve and the air/water collecting channel, and the sample can be controlled to be stored in the sample storage bin through the one-way valve in the air/water collecting channel without flowing backwards. After collection, one side of the balance piston is communicated with the outside seawater through an overflow hole in the process of extracting the sample from the collection device, and according to the pressure self-adaptive balance principle, the balance piston automatically moves under the double functions of pressure difference and elasticity of a pressure spring, so that the pressure inside and outside the sample storage bin is maintained by changing the volume of the sample storage bin and changing the pressure inside the sample storage bin, and the process can ensure the safe pressure relief and retrieval of the collection device. After the collection device is retracted, the collection device is connected with the degassing device through the vacuum valve, water-soluble gas is collected, and then a water sample is collected through the vacuum valve, so that complete sampling is achieved.
Drawings
FIG. 1 is a schematic diagram of a deep sea water and dissolved gas collection system according to the present invention;
1. the high-pressure sealing cabin comprises a high-pressure sealing cabin body 11, a transformer 13, an electromagnetic valve 131, an electromagnetic valve core 14, a circuit board fixing frame 15, a limiting ring 16, a watertight connector 17 and a threaded connector;
2. The device comprises a sampling bottle, a closed shell, a sample storage bin, a balance piston, a pressure spring, an overflow hole, a vacuum valve, a gas/water collecting inlet and a one-way valve.
Detailed Description
Embodiments of the present invention will be described below with reference to the accompanying drawings.
A deep sea water and dissolved gas collecting device, as shown in figure 1, comprises a high-pressure sealed cabin 1 and a sampling bottle 2; the sampling bottle 2 comprises a closed shell 21 and an internal sample storage bin 22, wherein the tail end of the sample storage bin 22 is provided with a balance piston 23, the side wall of a cavity where the balance piston 23 is arranged is provided with an overflow hole 24 communicated with the balance piston, and the side wall of the sample storage bin 22 is provided with a vacuum valve 25 communicated with the outside;
the high-pressure sealed cabin 1 comprises a high-pressure sealed cabin body 11, a transformer 12, a circuit board and an electromagnetic valve, wherein the transformer 12 is arranged at the tail end of the high-pressure sealed cabin body 11, one side of the transformer is provided with a circuit board fixing frame 14, the circuit board is arranged on the circuit board fixing frame 14, the electromagnetic valve is arranged at the other end of the high-pressure sealed cabin body 11, a limiting ring 15 for limiting the electromagnetic valve is arranged between the electromagnetic valve and the circuit board fixing frame 14, and the tail end of the high-pressure sealed cabin body 11 is provided with a water-tight plug-in unit 16;
The inlet end of the sample storage bin 22 is provided with an air/water collecting channel communicated with the inner cavity of the sample storage bin, and a one-way valve 27 is arranged in the air/water collecting channel; the electromagnetic valve 13 is communicated with the air/water collecting channel, and the electromagnetic valve core 131 enters the air/water collecting channel and is further communicated with the sample storage bin 22;
the end of the high-pressure sealed cabin body 11 connected with the sampling bottle is provided with a threaded connecting piece 17, and a closed shell 21 of the sampling bottle is connected with the high-pressure sealed cabin body 11 through the threaded connecting piece 17; the closed shell 21 of the sampling bottle 2 is provided with an air/water collecting inlet 26, one end of the air/water collecting inlet 26 is communicated with the outside, and the other end of the air/water collecting inlet is communicated with the electromagnetic valve 13;
The sampling bottle 2 and the end of the high-pressure sealing cabin body 11 are both arranged in a closed mode.
The vacuum valve 25 includes two valves provided on both sides of the side wall of the sample storage bin 22. In this embodiment, the sample storage chamber 22 is preferably sealed with a polytetrafluoroethylene-coated O-ring.
The balance piston 23 includes a spring compression spring 231 and a piston body, the spring compression spring 231 being located between the piston body and the end of the closure housing 21.
Wherein, high pressure seal cabin: the sealing device is used for storing electronic components such as a circuit board, an electromagnetic valve 13, a transformer 12, a circuit board fixing frame 14, a watertight connector 16 and the like, and can ensure that the electronic components therein can be kept sealed under high-pressure water.
Circuit board holder 14: the circuit board fixing device is arranged in the center of the inside of the high-pressure sealing cabin body 11 and used for fixing the circuit board and guaranteeing the position fixing of the circuit board in the high-pressure sealing cabin body 11.
A transformer 12: is stored in the high-pressure sealed cabin 11 and is used for converting the shipborne 220v voltage into 24v voltage suitable for the sampling bottle 2 to work.
Limit ring 15: the high-pressure electromagnetic valve is positioned at one end, close to the sampling bottle 2, in the high-pressure sealed cabin 11 and is mainly used for fixing the position of the high-pressure electromagnetic valve 13 and limiting the high-pressure electromagnetic valve 13 to move randomly in the high-pressure sealed cabin 11.
Solenoid valve 13: the switch for controlling the external seawater to flow into the sample storage bin 22 is controlled to be opened and closed by a circuit board, a shipboard power supply and a control system. Normally in a closed condition, ambient seawater immediately enters the relatively negative pressure sample storage bin 22 through the air/water collection inlet 26 once opened.
Gas/water collection channel: the sample storage bin 22 is positioned at one end close to the high-pressure sealed cabin 1, and a one-way valve 27 is arranged in the air/water collecting channel and is communicated with the electromagnetic valve 13 at the end part of the high-pressure sealed cabin body 11. Before water is not collected, the electromagnetic valve 13 is closed, the air/water collection channel and the sample storage bin 22 are in a vacuum state, and external seawater cannot enter the pipeline to flow into the sample storage bin 22 through the one-way valve 27; when water is required to be collected, the electromagnetic valve 13 is opened, the air/water collection channel, the one-way valve 27 and the sample storage bin 22 are in a communication state, and external water immediately enters the sample storage bin 22 through the channel according to the principle of lowest energy.
Check valve 27: the check valve 27 is provided to ensure the flow direction of the gas/water sample, and to ensure that the collected gas/water sample does not flow backward.
Balance piston 23: is composed of a spring and a compression spring 231 and a piston body. The balance piston 23 is communicated with the outside through the overflow hole 24, the pressure moment is the same as the outside, before the sampling bottle 2 is launched, the piston moves to the direction of the sample storage bin 22 extremely because the sample storage bin 22 is vacuumized, but the piston can only move to the limit position at maximum due to the limitation of the limit point. In the recovery process of the sampling bottle 2, the sample storage bin 22 is in a higher pressure state, along with the continuous decrease of the external water pressure at one side of the piston, the balance piston 23 slowly moves towards the direction away from the air/water collection inlet 26 according to the pressure self-adaptive balance principle, the volume in the sample storage bin 22 is continuously increased, the pressure is gradually reduced, and the internal and external pressures of the sample storage bin 22 are kept balanced under the action of the spring pressure spring 231 at the other side.
Overflow aperture 24: the overflow aperture 24 keeps the pressure on the piston side the same as the outside world at the moment.
Watertight connector 16: the high-voltage sealed cabin is characterized in that the high-voltage sealed cabin is a tie which is formed by connecting a transformer 12 and a circuit board in a high-voltage sealed cabin 11 with a high-voltage watertight cable, and is a bridge which is formed by connecting a sampling bottle 2 with a shipborne power supply.
The invention also provides a method for collecting the deep sea water and dissolved gas by using the device for collecting the deep sea water and the dissolved gas, which comprises the following steps:
a. The circuit system of the acquisition device is connected with the shipboard power supply through the high-voltage watertight cable.
B. The sample storage bin 22 is evacuated by connecting the collection device to an on-board vacuum pump via a vacuum valve 25.
C. The collection device is lowered to a designated horizon depth of the collection zone using an on-board cable, winch or other mounting facility.
D. The electromagnetic valve 13 is controlled to be opened through a deck circuit, seawater outside the sampling bottle 2 enters the sample storage bin 22 from the gas/water collecting inlet 26 through the electromagnetic valve 13, after the preset time of collection, the electromagnetic valve 13 is closed, the collected sample is stored in the sample storage bin 22, and the collection is finished; the acquisition time is usually preset to 2-3 minutes.
E. Lifting the collection device from the collection area, the balance piston 23 automatically moves due to the pressure difference and the elasticity of the spring 231, and the volume of the sample storage bin 22 is changed to maintain the balance of the internal and external pressures of the sample storage bin 22.
F. After the device is lifted to the deck of the cabin, the device is connected with a degassing device through a vacuum valve 25, samples in the sample storage bin 22 are respectively collected, and a water-soluble gas sample and a water body sample are sequentially obtained.
Before the sample bottle 2 is put down, the vacuum pump is connected to the vacuum valve 25, the sample storage bin 22 is vacuumized in advance, negative pressure is artificially produced, and the sample storage bin 22 is directly used as a negative pressure bin.
The sample storage bin 22 is sealed at one end and connected with a freely movable piston at the other end, and a proper spring compression spring 231 is arranged at the other side of the piston and is communicated with the outside seawater through an overflow hole 24, and the movement of the piston can indirectly expand the space of the sample storage bin 22, so that the safety release of pressure is realized. In the process of recycling the sampling bottle 2, along with the slow rising of the sampling bottle 2, the external water pressure of the sampling bottle 2 is gradually reduced, and according to the pressure self-adaptive balance principle, the high-pressure seawater sample in the sample storage bin 22 pushes the piston to slightly move, the volume of the sample storage bin 22 is enlarged by the movement of the piston, and the pressure in the bin is reduced. The sampling bottle 2 is gradually raised, the piston is gradually moved, the pressure in the sample storage bin 22 is gradually reduced, and the pressure in the sample storage bin is completely released when the pressure reaches the sea surface. This allows for a safe release of the high pressure within the sample storage compartment 22.
According to the deep sea water and dissolved gas collecting device provided by the invention, the inside of the sampling bottle 2 is provided with the sample storage bin 22 which is vacuumized in advance, namely the negative pressure bin, the outside of the sampling bottle 2 is provided with a deep sea environment with a certain high pressure, a large pressure difference exists between the sampling bottle 2 and the negative pressure bin, the negative pressure bin and the outside sea water are communicated or closed through the opening and closing of the electromagnetic valve 13, once the electromagnetic valve 13 is opened, the negative pressure bin is communicated with the outside deep sea environment, and according to the principle of lowest energy, the outside sea water with a relatively high pressure enters the negative pressure bin with a relatively low pressure, so that the collection of the sea water is realized. In addition, the sample storage bin 22 and the piston are sealed by a polytetrafluoroethylene-coated O-shaped ring, so that the collected seawater sample can be stored in an airtight manner.
Compared with the prior art, has the advantages that:
The advantage of gas seal preservation: the self-locking flip water sampling bottle adopts the elastic rope sealing structure, the sealing degree is not high enough, the water-soluble gas remained in the seawater is difficult to be completely stored, the sealing mode of the polytetrafluoroethylene-coated O-shaped ring is adopted by the device, the sealing effect is better, and the storage of the water-soluble gas in the seawater sample is more facilitated.
The design advantage of negative pressure storehouse structure: the vacuum extraction formula water sampling bottle is through setting up a negative pressure bucket in addition and taking as the negative pressure storehouse, and this device is in advance with sample storehouse 22 evacuation to directly regard as the negative pressure storehouse with sample storehouse 22, compare, this device's structure is simpler, the system is more stable, the design is more ingenious, and the volume is smaller and exquisite, and it is all more convenient to operate and carry.
Advantages of the sample cartridge high pressure release scheme: the vacuum extraction type water sampling bottle releases high pressure in the sample bin by additionally hanging a balance barrel, and the device is based on the pressure self-adaptive balance principle, and the piston moves along with the change of external pressure by means of the structural design of the piston, the spring pressure spring 231, the overflow hole 24 and the like, so that the volume of the sample bin 22 is changed along with the change of external pressure, and the safe release of the pressure of the sample bin 22 is realized. The safe release of the pressure of the sample storage bin 22 is achieved by the free movement of the piston. In contrast, the device has simpler structure, safer, more stable, smaller volume, lighter weight and more convenient operation and carrying.
Natural gas hydrate is widely regarded as a clean energy source in the future worldwide. International research on natural gas hydrate geochemistry anomalies has focused mainly on hydrocarbon gas concentration anomalies of sediment, pore water and bottom seawater, C, O isotope compositions and their relationship with natural gas hydrates. Anomalies in hydrocarbon gases (e.g., methane) and other gases (e.g., H 2 S) in seawater are one of the important identifiers for identifying the presence of natural gas hydrates, and the ratio of CH 4/C2H6 or C 1/(C2+C3) to delta 13C in CH 4 can be used to identify the source and cause of the natural gas hydrates; the content of the gas in the deep sea water can identify the deep sea resource reserve to a certain extent, by detecting abnormal distribution of the gas such as CH 4、H2 S in the sea water, clues and basis can be provided for quickly and efficiently exploring the natural gas hydrate resource, the research of the gas in the deep sea water and the sea water is the leading-edge subject of the current ocean science research, how to quickly acquire the sea water sample which can truly reflect the composition information of the in-situ gas component is a hotspot of the research in the ocean technical field in recent years, and the airtight acquisition of the deep sea water is significant. The conventional water sampler is mostly used for simply collecting water samples, less consideration is given to gas preservation, and the requirement of gas research in deep sea water cannot be met. Some water sampling bottles such as negative pressure extraction type water sampling bottles can collect the seawater with air retention, but the water sampling device and the operation process are very complex and complicated, which is not beneficial to the rapid collection of on-board on-site samples.
According to the energy minimum principle and the pressure self-adaptive balance principle, the device realizes the rapid collection of the seawater and dissolved gas samples on the shipborne site by arranging the high-pressure sealing cabin 1, the transformer 12, the high-pressure watertight cable, the circuit board, the limiting ring 15, the electromagnetic valve 13, the one-way valve 27, the sample storage bin 22, the balance piston 23, the vacuum valve 25, the spring pressure spring 231 and the like. Realizes the airtight sampling of the deep sea water. The device has the characteristics of small size, low weight, simple operation, easy carrying and maintenance and the like, the invention further complements and perfects the rapid acquisition method of the shipborne field deep sea water and water-soluble gas, overcomes the defect of identifying the field rapid acquisition of the water-gas chemical abnormality mark in the investigation of the hydrate resource, and provides necessary technical support for the exploration and analysis of the natural gas hydrate resource in the sea area of China.
Although several embodiments of the present invention have been described above, these embodiments are presented by way of example only and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other modes, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the present invention, and are also included in the invention described in the claims and their equivalents.
Claims (4)
1. The deep sea water and dissolved gas collecting device is characterized by comprising a high-pressure sealed cabin and a sampling bottle;
The sampling bottle comprises a closed shell and an internal sample storage bin, the tail end of the sample storage bin is provided with a balance piston, the side wall of a cavity where the balance piston is arranged is provided with an overflow hole communicated with the balance piston, and the side wall of the sample storage bin is provided with a vacuum valve communicated with the outside;
The sample storage bin and the piston are sealed by adopting an O-shaped ring coated by polytetrafluoroethylene;
the balance piston comprises a spring pressure spring and a piston body, and the spring pressure spring is positioned between the piston body and the tail end of the closed shell;
The high-pressure sealed cabin comprises a high-pressure sealed cabin body, a transformer, a circuit board and an electromagnetic valve, wherein the transformer is arranged at the tail end of the high-pressure sealed cabin body, one side of the transformer is provided with a circuit board fixing frame, the circuit board is arranged on the circuit board fixing frame, the electromagnetic valve is arranged at the other end of the high-pressure sealed cabin body, a limiting ring for limiting the electromagnetic valve is arranged between the electromagnetic valve and the circuit board fixing frame, and the tail end of the high-pressure sealed cabin body is provided with a watertight connector;
the inlet end of the sample storage bin is provided with an air/water collection channel communicated with the inner cavity of the sample storage bin, and a one-way valve is arranged in the air/water collection channel; the electromagnetic valve is communicated with the gas/water collecting channel and then is communicated with the sample storage bin;
A threaded connector is arranged at one end of the high-pressure sealed cabin body connected with the sampling bottle, and a closed shell of the sampling bottle is connected with the high-pressure sealed cabin body through the threaded connector; the closed shell of the sampling bottle is provided with an air/water collecting inlet, one end of the air/water collecting inlet is communicated with the outside, and the other end of the air/water collecting inlet is communicated with the electromagnetic valve;
the tail ends of the sampling bottle and the high-pressure sealed cabin body are sealed.
2. The deep sea water and dissolved gas collecting apparatus of claim 1, wherein the vacuum valve comprises two vacuum valves respectively provided at both sides of the side wall of the sample storage bin.
3. A method of harvesting using the deep sea water and dissolved gas harvesting apparatus of claim 1, comprising the steps of:
a. the circuit system of the acquisition device is communicated with a shipborne power supply through a high-voltage watertight cable;
b. connecting the collection device with a shipborne vacuum pump through the vacuum valve, and vacuumizing the sample storage bin;
c. Lowering the acquisition device to a designated horizon depth of an acquisition area by utilizing a shipborne carrying facility;
d. The electromagnetic valve is controlled to be opened through a deck circuit, seawater outside the sampling bottle enters the sample storage bin from the gas/water collecting inlet through the electromagnetic valve, after the preset time is collected, the electromagnetic valve is closed, a collected sample is stored in the sample storage bin, and the collection is completed;
e. lifting the collecting device from the collecting area, automatically moving the balance piston due to pressure difference and elasticity of the pressure spring, and changing the volume of the sample storage bin to maintain balance of the internal pressure and the external pressure of the sample storage bin;
f. After the device is lifted to a cabin deck, the device is connected with a degassing device through the vacuum valve, samples in the sample storage bin are respectively collected, and a water-soluble gas sample and a water body sample are sequentially obtained.
4. A method according to claim 3, wherein in step d, the preset time for acquisition is 2-3 minutes.
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| CN201711084697.5A CN107817131B (en) | 2017-11-07 | 2017-11-07 | Deep sea water and dissolved gas collecting device and method |
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| CN107817131B true CN107817131B (en) | 2024-04-19 |
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