CN114354271B - Deep sea multi-channel high-spatial resolution water sampler carried on ROV - Google Patents
Deep sea multi-channel high-spatial resolution water sampler carried on ROV Download PDFInfo
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- CN114354271B CN114354271B CN202111463501.XA CN202111463501A CN114354271B CN 114354271 B CN114354271 B CN 114354271B CN 202111463501 A CN202111463501 A CN 202111463501A CN 114354271 B CN114354271 B CN 114354271B
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Abstract
The application relates to a deep sea sampling technology, and aims to provide a deep sea multichannel high-spatial resolution water sampler mounted on an ROV. The water sampler comprises a flow distributing valve structure, a steering valve structure and a piston structure; the flow distribution valve structure comprises a flow distribution valve and a driving motor; the steering valve structure comprises a steering valve and a driving motor; the piston structure comprises a piston drawing structure and a driving motor. The application provides a negative pressure condition for the water sampler by utilizing the piston drawing structure, and under the condition of maintaining the original environment of the deep sea water environment, the high spatial resolution acquisition is carried out on the deep sea water sample in real time so as to obtain water samples with different positions, different depths and different time resolutions. The application provides important technical means support for the development of deep sea water sampling technology in the fields of marine natural gas hydrate exploration and exploitation, marine ecological environment monitoring and the like. Can be mounted on equipment such as a deep sea moving platform, an ROV and the like to sample seawater of 4000 meters or more in deep sea.
Description
Technical Field
The application relates to a deep sea sampling technology, in particular to a deep sea multichannel high spatial resolution water sampler carried on an ROV. The sampler can carry out multipath sampling on the deep sea water under the state of maintaining the original environment of the deep sea, thereby obtaining the deep sea water samples with different time sequences, different point positions and different sample amounts in situ.
Background
The collection and research of deep sea water has been a popular and important topic in the field of marine research. In marine environmental pollution monitoring, hydrologic investigation and biological sampling, the measurement and analysis of organic and inorganic matters, special ions and trace metals, suspended matters and plankton, radionuclides and fungi in water are attracting more and more attention. The seawater sample which can truly reflect the composition information of the water body is collected through the deep sea sampling equipment, which is not only helpful for deep sea exploration and development of submarine mineral resources, but also is helpful for deep sea microorganism research and perfecting the knowledge of deep sea biosphere, is an important technical means in the field of deep sea exploration, and is very important for the development of submarine resources.
With the continuous deep research of the ocean, the exploration of the ocean field by human beings reaches the full sea depth level, the quality requirement on the seawater sample is higher and higher, and the design requirement on the sampling device is higher and higher. The deep sea is a high-pressure, low-temperature and strong-corrosion environment, and the sea floor is complex in topography and the surrounding sea water is in a dynamic change process all the time, so that the conditions increase the difficulty of collecting the deep sea water. At present, most water samplers utilize a mode of driving a motor and a balance sampling valve in a matching way, the equipment structure is complex, and if the in-situ pressure and the tightness of a seawater sample cannot be ensured, partial seawater gas leakage or obvious loss of the pressure of the seawater sample is caused in the sampling process, so that the analysis result can be obviously distorted.
With the rapid development of the disciplines such as marine ecology and marine geology, the requirements for the collected seawater sample are also higher and higher, and the gas information such as CH contained in the seawater sample 4 、H 2 S、CO 2 、H 2 The content of the gas is important for tracking marine mineral resources such as seabed natural gas hydrate, hot liquid, cold spring and the likeThe sign is an important development direction of the current deep sea resource exploration field, and the deep sea layered airtight water sample collection system is specially researched and designed for adapting to the requirement. Due to the limitation of the deep sea environment and the equipment size, the deep sea water sampler cannot meet the requirements of the water collection quantity and the sample quantity at the same time. At present, in shallow sea water, a multi-channel sea water sampler capable of monitoring sea water chemical and biological information can reach 128 sampling channels at most, but the sampling quantity is only 40ml. Therefore, the high-spatial-resolution water sampler is researched, so that the sampling volume is ensured to be sufficient, and meanwhile, the information such as the seawater depth, the time resolution and the like which are as rich as possible can be obtained.
On the basis of ensuring the quality of a water sample, simplifying the structure of equipment and meeting the sampling density and the sampling volume on a time sequence is the difficulty and the key point of the current water sampler design. Therefore, it is necessary to study a deep sea multichannel high spatial resolution water sampler mounted on an ROV, which can obtain multichannel water samples with different time sequences, different points, different depths and different sample amounts.
Disclosure of Invention
The application aims to solve the technical problem of overcoming the defects in the prior art and providing the deep sea multichannel timing water sampler carried on an ROV. The application aims to realize the deep sea water collection with high time resolution on the basis of simplifying the equipment structure, and solves the problems that the time sequence of the water sample, the density of sampling points and the sample quantity are difficult to be simultaneously considered when the water sample is collected in time in the prior art.
In order to solve the technical problems, the application adopts the following solutions:
providing a deep sea multipath high spatial resolution water sampler, comprising a flow distribution valve structure, a steering valve structure and a piston structure; the valve structure comprises a valve body and a cylindrical valve core, wherein the valve body comprises a valve body and a cylindrical valve core; the valve body is provided with a water guide port, a water inlet and at least one circle of water outlet which are circumferentially arranged along the valve body and are all communicated with the valve body; a water inlet channel, a water drain channel and a water guide channel are arranged in the valve core, and a through water inlet hole and a through water drain hole are arranged at the bottom of the valve body; the valve core is sleeved in the counter bore of the valve body and can rotate around the shaft in a stepping way under the drive of the driving motor, so that the communication and the switching among the water guide opening, the water inlet and the water outlet, the water inlet hole and the water outlet hole are realized; the steering valve structure comprises a steering valve and a driving motor, wherein the steering valve consists of a valve body and a valve core; the valve body is provided with a water inlet, a first water guide port and a second water guide port; the valve core is internally provided with a water guide channel connected with the first water guide port, is sleeved in the valve body and can rotate under the drive of the driving motor, so that the communication and the switching between the water guide channel and the water inlet and between the water guide channel and the second water guide port are realized; the first water guide port is connected with a water inlet in the flow distribution valve structure through a pipeline, and the second water guide port is connected with the water guide port in the flow distribution valve structure through a pipeline; the piston structure comprises a piston drawing structure and a driving motor, wherein the piston drawing structure consists of a drawing cylinder body and a driving piston; one side of the driving piston is connected with the output end of the driving motor through a screw rod structure, and the other side of the driving piston is communicated with a water inlet hole and a water discharge hole in the flow distribution valve structure.
As an improvement of the application, PEEK connectors are provided in the water guide port, the water inlet, the water outlet, the first water guide port and the second water guide port for connecting an external pipe or a sampling bag.
As an improvement of the application, each driving motor is arranged in a motor cabin and watertight is realized by an end cover; a watertight connector is arranged on the motor cabinet or the end cover and is used for connecting an external cable.
As an improvement of the application, the driving motor of the flow distribution valve structure is arranged in the motor cabin, and a photoelectric switch consisting of a photoelectric sensor and a separation plate is also arranged in the motor cabin and used for zeroing the rotation angle of the motor so as to reduce the accumulated error.
As an improvement of the application, in the flow distribution valve structure, at least two circles of water outlets are arranged along the circumferential direction of the valve body; the number of the drainage channels in the valve core is the same as the number of turns of the water outlet on the valve body, and the positions of the drainage channels are mutually corresponding.
As an improvement of the present application, in the steering valve structure, the driving motor is a steering servo motor capable of realizing forward or reverse rotation at a preset angle.
As an improvement of the application, the driving motor in the piston structure is arranged in the motor cabin, the driving motor is a screw rod stepping motor, and the driving motor and the circuit board are arranged on the bracket.
As an improvement of the application, the pipeline connecting the first water guide port with the water inlet and the second water guide port with the water guide port is a silica gel hose.
As an improvement of the application, the flow distribution valve structure and the piston structure are arranged in opposite directions, and the two driving motors are positioned at the outer end parts, and the bottom of the valve body in the flow distribution valve structure and the opening end of the piston drawing structure in the piston structure are fixedly installed in opposite directions; at least two fixed connecting rods are arranged between the motor cabinet end covers of the two driving motors, and the steering valve structure is arranged between the flow distribution valve structure and the piston structure and is fixedly arranged on the connecting rods.
As an improvement of the application, the driving motor of the steering valve structure is arranged in the motor cabin, and the outside of the motor cabin is provided with a hoop or clamping structure for realizing fixed installation.
Compared with the prior art, the application has the beneficial effects that:
(1) The application provides a negative pressure condition for the water sampler by utilizing a piston drawing structure, and under the condition of maintaining the original environment of the deep sea water environment, the deep sea water sample is collected in real time with high spatial resolution, so as to obtain water samples with different positions, different depths and different time resolutions. The application provides important technical means support for the development of deep sea water sampling technology in the fields of marine natural gas hydrate exploration and exploitation, marine ecological environment monitoring and the like.
(2) The device can be mounted on equipment such as a deep sea moving platform and an ROV (remote operated vehicle) to sample seawater of 4000 meters or more in deep sea.
(3) The device utilizes a mode that a plurality of water outlets are annularly and continuously arranged on a cylindrical flow distribution valve body and matched with a flow distribution stepping motor to control the discharge and the preservation of water samples. Finally, tens of discrete water samples with different positions, different depths and different time resolutions can be obtained.
(4) The device adopts the photoelectric sensor to calibrate the positioning precision of the current distribution stepping motor, and the photoelectric sensor carries out zero setting on the accumulated rotation angle of the motor after each rotation of the current distribution stepping motor for reducing the accumulated error.
(5) The device provides a mode similar to a high-pressure electric control three-way valve, and the mutual switching of the water inlet and the water guide port is completed by driving the rotation of the steering valve core through a motor.
(6) The device adopts motor drive to carry out water sample collection, and during the sample, the piston inside the lead screw stepper motor drive pull section of thick bamboo provides suction and takes a sample, and the principle is simple, need not extra suction.
Drawings
FIG. 1 is an overall device diagram of the present application;
FIG. 2 is a front view and a top view of the structure of the distributing valve of the present application;
FIG. 3 is a cross-sectional view of a water inlet line A-A and a distribution valve structure according to the present application;
FIG. 4 is a cross-sectional view of a water conduit of the present application with a flow distributing valve structure;
FIG. 5 is a schematic view of the steering valve of the present application;
FIG. 6 is a cross-sectional view of a piston driving portion structure and B-B according to the present application.
Reference numerals in the drawings: 1, a flow distribution valve drives a motor cabin; 2, a flow distribution valve drives a motor cabin end cover; 3, a distributing valve; 4 PEEK joint of water inlet; 5 a steering valve; 6, driving a motor cabin by a steering valve; 7, hooping; 8, driving a motor cabin end cover by a piston; 9, driving the motor cabin by a piston; 10 PEEK connector of outlet; 11 a piston drawing structure; 12 watertight connector; 13 a distributing valve body; 14 a distributing valve water outlet; 15, a water guide port of the distributing valve; 16 a water inlet of a distributing valve; 17 valve core of distributing valve; 18 a water inlet channel; 19 drainage channels; 20 water guide channels; a first water guide port 21; a 22 water inlet; 23 steering valve motor compartment; 24 watertight connector of steering valve; a second water guide port 25; 26 drawing the cylinder; 27 driving a piston; 28 lead screw structure; 29 driving a motor; 30 mounting brackets.
Detailed Description
The numbering of the components itself, e.g. "first", "second", etc., in the present application is used only to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
The application will be described in detail below with reference to specific embodiments thereof in conjunction with the accompanying drawings.
As shown in fig. 1, the deep sea multichannel high spatial resolution water sampler of the application comprises a flow distributing valve structure, a steering valve structure and a piston structure; the distributing valve structure comprises a distributing valve 3 and a driving motor, wherein the distributing valve consists of a cup-shaped distributing valve body 13 and a cylindrical distributing valve core 17, a distributing valve water guide port 15, a distributing valve water inlet 16 and at least two circles of distributing valve water outlet 14 which are arranged along the circumferential direction of the valve body are arranged on the distributing valve body 13, and all three parts penetrate through the valve body. A water inlet channel 18, a water outlet channel 19 and a water guide channel 20 are arranged in the valve core 17 of the distributing valve, and a through water inlet hole and a through water outlet hole are arranged at the bottom of the valve body 13 of the distributing valve; the number of the water discharge channels 19 in the valve core is the same as the number of turns of the water discharge outlet 14 of the distributing valve on the valve body, and the positions of the water discharge channels are corresponding to each other. The valve core 17 of the distributing valve is sleeved in a counter bore of the valve body 13 of the distributing valve, and can rotate around the shaft in a stepping way under the drive of a driving motor, so that the communication and the switching among the water guide port 15 of the distributing valve, the water inlet 16 of the distributing valve and the water outlet 14 of the distributing valve on the side wall of the valve body, and the water inlet and the water outlet at the bottom of the valve body are realized. Each dispensing valve outlet 14 is adapted to be connected to a separate external water storage sampling bag.
The steering valve structure comprises a steering valve 5 and a driving motor, wherein the steering valve consists of a valve body and a valve core; the valve body is provided with a steering valve water inlet 22, a first water guide port 21 and a second water guide port 25; the valve core is internally provided with a water guide channel connected with the first water guide port 21, the valve core is sleeved in the valve body and can rotate under the drive of the driving motor, and the communication and the switching between the water guide channel and the water inlet 22 and the second water guide port 25 of the steering valve are respectively realized; wherein, the steering valve water inlet 22 is communicated with the outside sea water, the first water guiding port 21 is connected with the distributing valve water inlet 16 through a pipeline, and the second water guiding port 25 is connected with the distributing valve water guiding port 15 through a pipeline.
The piston structure comprises a piston drawing structure 11 and a driving motor, wherein the piston drawing structure consists of a drawing cylinder 26 and a driving piston 27; one side of the driving piston 27 is connected with the output end of the driving motor through a screw rod structure 28, and the other side of the driving piston 27 is communicated with a water inlet hole and a water outlet hole at the bottom of the valve body 13 of the distributing valve. In the distributing valve water guide 15, the distributing valve water inlet 16, the distributing valve water outlet 14, the first water guide 21 and the second water guide 25 PEEK fittings are provided for connecting an external pipe, optionally a silicone hose, or a water storage sampling bag.
Each driving motor is arranged in the motor cabin and watertight is realized by the end cover; a watertight connector is arranged on the motor cabinet or the end cover and is used for connecting an external cable. Wherein, in the valve drive motor cabinet 1 of joining in marriage, still be equipped with the photoelectric switch that comprises photoelectric sensor and division board for return to zero to reduce accumulated error to motor rotation angle. In the steering valve driving motor compartment 6, a steering servo motor capable of achieving forward or reverse rotation at a preset angle is employed. In the piston-driven motor compartment 9, the driving motor 28 is a screw stepping motor, and the driving motor 28 and the circuit board are fixed on the mounting bracket 30.
In the aspect of the overall layout of the water sampler, the flow distribution valve structure and the piston structure are arranged in opposite directions, two driving motors of the flow distribution valve structure are positioned at the outer side end parts, and the bottom of a valve body in the flow distribution valve structure and the opening end of a piston drawing structure 11 in the piston structure are fixedly installed in opposite directions; at least two fixed connecting rods are arranged between the motor cabinet end covers of the two driving motors, and the steering valve structure is arranged between the distributing valve structure and the piston structure and is fixedly arranged on the connecting rods. Specifically, a hoop 7 (or a clamping structure) is arranged outside the steering valve driving motor cabin 6 for realizing fixed installation.
More specifically described below:
the driving structure of the flow distribution valve comprises a stepping motor, a photoelectric switch and a transmission part. The stepping motor provides steering power for the distributing valve structure, and the transmission part drives the valve core 17 of the distributing valve to rotate and is matched with a water outlet on the surface of the valve body 13 of the distributing valve to drain water. In order to improve the positioning precision of the stepping motor and reduce the accumulated error, the photoelectric switch is formed by the photoelectric sensor and the isolation plate, and the rotation angle of the stepping motor is zeroed by the photoelectric switch after each rotation of the stepping motor so as to reduce the accumulated error. The stepping motor is provided with a speed reducer, so that the rotation precision of the valve core can be improved, and the valve core can be better matched with the position.
50 penetrating round holes with the diameter of 5mm are formed in the circumferential side surface of the valve body 13 of the flow distribution valve, the two circles are divided into two circles and used as water outlets 14 of the flow distribution valve, and PEEK joints are arranged in the water outlets; the 25 water outlets of a single circle are perforated every 14.4 degrees, so the angle between each water outlet of the 50 water outlets is 7.2 degrees. Two through round holes are additionally arranged as a water guide port 15 of the flow distribution valve and a water inlet 16 of the flow distribution valve, and are connected with the steering valve 5 through a PEEK joint and a silica gel conduit. PEEK is a high-temperature-resistant thermoplastic plastic, has the characteristics of high temperature resistance, self lubrication, fatigue resistance and the like, and can replace metal in a plurality of special fields, so that the PEEK is used as a joint of each water guide port, each water inlet and each water outlet. Based on the design, the deep sea water sample is subjected to timed high spatial resolution acquisition through programming, and the stepping motor drives the transmission part to drive the valve core to rotate and match with the valve body. According to the step angle of 1.8 degrees of the current distribution motor, when the rotation step number of the current distribution motor is 2n, the upper water guide channel of the current distribution valve core is communicated with the water outlet at the upper layer of the valve body, and the water sample is discharged from the upper layer of the valve body. When the rotation step number of the current distribution motor is 2n+1, the water guide channel at the lower layer of the current distribution valve core is communicated with the water outlet at the lower layer of the valve body, and the water sample is discharged from the lower layer of the valve body. A single deep sea multichannel timing water sampler can collect up to 50 discrete water samples. When the drainage channel in the valve core is overlapped with a certain drainage port, the water sample can be discharged and effectively stored, and 50 discrete water samples can be effectively distinguished and stored.
As shown in fig. 3 and 4, the water inlet channel 18 is used for communicating the water inlet 16 of the distributing valve with the water inlet at the bottom of the valve core of the distributing valve, and the latter is communicated with the piston drawing device 11; the water guide channel 20 is used for communicating the water guide opening 15 of the distributing valve with the water discharge channel 19 so as to be connected with the water discharge opening 14 of the distributing valve; the drain channel 19 is used to communicate the valve drain opening 14 with the valve core bottom drain opening of the valve, which communicates with the piston drawer 11. When the water sampler works, water sample enters through the guide valve 5 and the water inlet 16 of the distributing valve, and flows through the water inlet channel 18 to be temporarily stored in the piston drawing device 11; during drainage, the piston drawing device 11 drives the water sample to be discharged to the water inlet 16 of the distributing valve through the water inlet channel 18, then flows into the water guide port 15 of the distributing valve through the steering valve 5, flows through the water guide channel 20 and the water discharge channel 19, finally flows out of the water discharge port 14 and is stored in an externally connected water storage sampling bag.
As shown in fig. 5, the steering valve structure corresponds to a high-pressure electric control three-way valve. The first water guide port 21 is connected with the water inlet 16 of the distributing valve, the water inlet 22 is communicated with the outside sea water, the motor cabin 23 of the steering valve and the second water guide port 25 are connected with the water guide port 15 of the distributing valve. The diverter valve 5 is used to control the switching of the water sampler between the water inlet and water guide lines. The steering valve adopts a steering servo motor in the structure, and drives the steering valve core to forward or reverse a certain angle, so that the internal channel of the steering valve is aligned with the water inlet 22 or the second water guide 25 on the surface of the steering valve body, and the water inlet and the water guide channels are switched. When the steering valve 5 is driven to enable the first water guide port 21 to be communicated with the water inlet 22, the piston drawing structure 11 is driven downwards to collect water. After the water sample collection is completed, the steering valve 5 is driven to enable the first water guide port 21 to be communicated with the second water guide port 25, the valve core 17 of the flow distribution valve is driven to be switched to a water guide pipeline, and the water sample is discharged from the water outlet 14 and stored in the water storage sampling bag through the upward driving piston pulling structure, so that the water sample collection is realized.
In order to successfully obtain a water sample, a negative pressure condition needs to be provided for the sampler. As shown in fig. 6, the driving motor 29 adopts a screw rod stepping motor to drive the driving piston 27 in the drawing cylinder 26 to move downwards or upwards so as to perform water collection and drainage processes. When the driving motor 29 drives the driving piston 27 to move downwards through the screw rod structure 28, water sample flows into the drawing cylinder 26; when the driving motor 29 drives the driving piston 27 to move upwards to the top end of the drawing cylinder 26, the water sample flows through the distributing valve structure, the steering valve structure and the distributing valve structure and is finally stored in the water storage sampling bag through the distributing valve water outlet 14. In addition, the sampling rate, sampling time, sampling amount, etc. can be changed by programming the drive motor 29, thereby enabling high operability of the water sampler. According to the requirements of the sample amounts required by different points, the distance of the piston moving downwards or upwards is changed, so that the collection of different sample amounts can be realized, the principle is simple, and additional suction force is not needed.
Through writing the control program of each driving motor, the mutual coordination among the current distribution stepping motor, the steering servo motor and the driving stepping motor can be realized, and the water sample is collected at fixed time and fixed quantity according to the requirement.
The following describes the working steps of the sampling process in this embodiment with reference to the accompanying drawings:
the whole set of device is arranged in a deep sea water environment for water sample collection by carrying equipment such as a movable ground detection platform or ROV, so that multiple paths of water samples with different point positions, different depths and different time resolutions can be obtained.
After the water sampler is arranged at a designated point, the steering valve 5 is switched to the water inlet channel 18, and the first water guide port 21 is internally communicated with the water inlet 22 of the steering valve. The stepping motor of the distributing valve drives the valve core 17 of the distributing valve to be connected with the water outlet 14 of a certain distributing valve. When sampling starts, the driving motor 29 is controlled to drive the driving piston 27 to move downwards, a water sample flows through the water inlet 16 of the distributing valve from the water inlet 22 of the steering valve to the first water guide 21 of the steering valve, flows into the water inlet channel 18 from the water inlet hole at the bottom of the distributing valve, is temporarily stored in the piston drawing device 11, and completes the collection of the water sample. When the water sample is discharged and stored, the steering valve 5 is switched to a water guide pipeline, the first water guide port 21 and the second water guide port 25 of the steering valve are communicated, the driving motor 29 is controlled to drive the driving piston 27 to move upwards, the water sample is discharged to the water inlet 16 of the distributing valve through the water inlet channel 18 through the water discharge hole at the bottom of the distributing valve, flows through the first water guide port 21 to the second water guide port 25 of the steering valve again and flows into the water guide port 15 of the distributing valve again, flows through the water guide channel 20 and the water discharge channel 19, finally flows into the water storage sampling bag through one path of water distribution water discharge port 14 for storage, and after the water sample completely flows into the water storage sampling bag, water sample collection is completed once. Then, the valve core 17 of the distributing valve is driven to rotate to switch the water outlet 14 of the other distributing valve, and meanwhile, the steering valve 5 is driven to switch to the water inlet pipeline to prepare for the second water sample collection. And by analogy, the water sampler can finally finish 50 paths of deep sea water collection with different time sequences, different point positions and different sample amounts so as to realize omnibearing three-dimensional sampling in high time and spatial resolution.
Finally, it should be noted that the above list is only a specific example of the application. Obviously, the application is not limited to the above embodiments, but many variations are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present application.
Claims (10)
1. The deep sea multichannel high-spatial resolution water sampler carried on the ROV is characterized by comprising a flow distribution valve structure, a steering valve structure and a piston structure; wherein,,
the flow distribution valve structure comprises a flow distribution valve and a driving motor, wherein the flow distribution valve consists of a cup-shaped valve body and a cylindrical valve core; the valve body is provided with a water guide port, a water inlet and at least one circle of water outlet which are circumferentially arranged along the valve body and are all communicated with the valve body; a water inlet channel, a water drain channel and a water guide channel are arranged in the valve core, and a through water inlet hole and a through water drain hole are arranged at the bottom of the valve body; the valve core is sleeved in the counter bore of the valve body and can rotate around the shaft in a stepping way under the drive of the driving motor, so that the communication and the switching among the water guide opening, the water inlet and the water outlet, the water inlet hole and the water outlet hole are realized;
the steering valve structure comprises a steering valve and a driving motor, wherein the steering valve consists of a valve body and a valve core; the valve body is provided with a water inlet, a first water guide port and a second water guide port; the valve core is internally provided with a water guide channel connected with the first water guide port, is sleeved in the valve body and can rotate under the drive of the driving motor, so that the communication and the switching between the water guide channel and the water inlet and between the water guide channel and the second water guide port are realized; the first water guide port is connected with a water inlet in the flow distribution valve structure through a pipeline, and the second water guide port is connected with the water guide port in the flow distribution valve structure through a pipeline;
the piston structure comprises a piston drawing structure and a driving motor, wherein the piston drawing structure consists of a drawing cylinder body and a driving piston; one side of the driving piston is connected with the output end of the driving motor through a screw rod structure, and the other side of the driving piston is communicated with a water inlet hole and a water discharge hole in the flow distribution valve structure.
2. The deep sea multi-channel high spatial resolution water sampler of claim 1, wherein PEEK connectors are provided in the water guide, water inlet and water outlet on the valve body of the distributing valve, and in the water inlet, first water guide and second water guide on the valve body of the diverting valve, respectively, for connecting external pipes or sampling bags.
3. The deep sea multichannel high spatial resolution water sampler of claim 1, wherein the drive motors in the flow valve structure, the steering valve structure and the piston structure are all installed in the motor compartment and watertight with the end cover; a watertight connector is arranged on the motor cabinet or the end cover and is used for connecting an external cable.
4. The deep sea multichannel high spatial resolution water sampler of claim 1, wherein the driving motor of the flow distribution valve structure is arranged in a motor cabin, and a photoelectric switch consisting of a photoelectric sensor and a separation plate is further arranged in the motor cabin and used for zeroing the rotation angle of the motor so as to reduce accumulated errors.
5. The deep sea multichannel high spatial resolution water sampler of claim 1, wherein at least two turns of water discharge openings are arranged along the circumference of the valve body in the flow distribution valve structure; the number of the drainage channels in the valve core is the same as the number of turns of the water outlet on the valve body, and the positions of the drainage channels are mutually corresponding.
6. The deep sea multichannel high spatial resolution water sampler of claim 1, wherein in the steering valve structure, the driving motor is a steering servo motor capable of realizing forward or reverse rotation according to a preset angle.
7. The deep sea multichannel high spatial resolution water sampler of claim 1, wherein the drive motor in the piston structure is mounted in a motor compartment, the drive motor is a lead screw stepper motor, and the drive motor and the circuit board are mounted on a bracket.
8. The deep sea multichannel high spatial resolution water sampler of claim 1, wherein the first water guide and the water inlet of the distributing valve are both silica gel hoses, and the second water guide and the water guide are both silica gel hoses.
9. The deep sea multichannel high spatial resolution water sampler of claim 1, wherein the flow distribution valve structure and the piston structure are arranged in opposite directions, two driving motors of the flow distribution valve structure are positioned at the outer end parts, and the bottom of a valve body in the flow distribution valve structure is fixedly installed in opposite directions to the opening end of a piston drawing structure in the piston structure; at least two fixed connecting rods are arranged between the motor cabinet end covers of the two driving motors, and the steering valve structure is arranged between the flow distribution valve structure and the piston structure and is fixedly arranged on the connecting rods.
10. The deep sea multichannel high spatial resolution water sampler of claim 9, wherein the driving motor of the diverter valve structure is arranged in a motor cabin, and a hoop or clamping structure is arranged outside the motor cabin for realizing fixed installation.
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| CN104062155A (en) * | 2014-06-26 | 2014-09-24 | 中国环境科学研究院 | Underground water and gas acquisition device |
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