Seawater sampling device

Abstract

The seawater sampling device comprises a frame body, a sampling container, a multi-way valve assembly, a collecting mechanism, a branch exhaust pipeline, a branch sampling pipeline, a branch blow-off pipeline and a water conveying mechanism, the multi-way valve assembly comprises a valve body, a valve element and a rotary power element, and a sampling communication opening and a blow-off communication opening which are distributed at intervals are formed in the circumferential direction of the valve body; a valve element channel is formed in the valve element, and the rotary power element can drive the valve element to rotate by a preset angle, so that the valve element channel is selectively communicated with the sampling communication port or the sewage discharge communication port; the collecting mechanism comprises a collecting container and a piston body; the water conveying mechanism comprises a pump body and a water conveying pipeline. Sea water at a preset depth under the sea is pumped into the water delivery pipeline, the valve core channel, the sewage discharge communication port, the branch sewage discharge pipeline and the collection cavity through the pump body, so that water remained in the water delivery pipeline and the valve core channel is the sea water at the preset depth, the cross contamination rate of water samples at different depths is reduced, and efficient sampling of the water samples at multiple depths can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of seawater sampling, and particularly to a seawater sampling device. Background Art

[0002] During the construction of offshore wind farms, it is necessary to consider the impact on the surrounding seawater environment. By collecting and detecting seawater at different depths near the offshore wind farm foundation, the impact of construction on the marine ecological environment can be evaluated. When collecting seawater, it is generally necessary to sample seawater at multiple depths. To improve the sampling efficiency, the seawater sampling device needs to consider how to collect water samples at multiple depths simultaneously during a single lowering. To improve the sampling accuracy, it is necessary to consider how to reduce the cross-contamination rate between water samples at different depths during the sampling process.

[0003] The patent with the patent number CN114166572B discloses a multi-channel seawater water sample collection device, which adopts a peristaltic pump drive and a rotary valve core switching technology, and realizes the sequential access of different sampling bottles by driving the flow distribution valve core to rotate through a motor. During sampling, the lower drainage port shares the drainage channel A of the flow distribution valve core, and the upper drainage port shares the drainage channel B of the flow distribution valve core. During its operation, when the flow distribution valve core switches from one sampling position to another sampling position, seawater will remain in the drainage channel A of the flow distribution valve core and the drainage channel B of the flow distribution valve core. Due to the lack of an effective cleaning mechanism, when the next sampling starts, the remaining seawater will enter the external water storage bag along with the new water sample, resulting in a relatively high cross-contamination rate between the sampled seawater at different depths.

[0004] Since the lower the cross-contamination rate between the sampled seawater at different depths, the more accurate the detection result. Therefore, to obtain a more accurate seawater detection result, it is necessary to improve the above device to reduce the cross-contamination rate between water samples at different depths during the sampling process. Summary of the Invention

[0005] Based on this, it is necessary to provide a seawater sampling device for the above technical problems.

[0006] To achieve the above object, the present invention provides a seawater sampling device, including: A frame; A sampling container, having a sampling inlet and a sampling outlet; A multi-way valve assembly, including a valve body, a valve core and a rotary power element. The valve core is located inside the valve body and is rotationally and sealingly connected to the valve body. A valve core channel is provided inside the valve core; the rotary power element is used to drive the valve core to rotate; sampling communication ports and sewage communication ports are arranged at intervals in the circumferential direction of the valve body; the valve core channel can be selectively communicated with the sampling communication port or the sewage communication port; A water delivery mechanism, including a pump body and a water delivery pipeline. The pump body provides power and delivers water to the valve core channel through the water delivery pipeline; The collecting mechanism comprises a collecting container and a piston body; the piston body is slidingly and sealingly installed in the collecting container and can form a closed collecting chamber together with the collecting container; A branch exhaust pipe is connected to the sampling outlet and the collection chamber in one direction; A branch sampling pipeline is connected to the sampling connection port and the sampling inlet; A branch sewage pipe connects the sewage connection port and the collecting chamber.

[0007] Preferably, an air inlet corresponding to the sampling container is provided at the bottom of the collecting container, and the sampling outlet is connected to the air inlet through a branch exhaust pipe; a water vapor outlet corresponding to the sewage connection port is provided at the bottom of the collecting container, and the water vapor outlet is connected to the sewage connection port through a branch sewage pipe.

[0008] Preferably, a first manual valve and a sampling connection pipe are sequentially connected between the sampling inlet and the branch sampling pipeline, and the sampling connection pipe and the branch sampling pipeline are connected via a quick connector. The sampling connection pipe is fixedly connected to the male connector of the quick connector, and the branch sampling pipeline is fixedly connected to the female connector of the quick connector.

[0009] Preferably, the multi-way valve assembly further comprises a valve cover, the valve cover is fixedly connected to the valve body, and the valve core is located in a space enclosed by the valve cover and the valve body.

[0010] Preferably, a motor compartment is fixed on the valve cover, the motor compartment is fixedly connected to the frame, the rotating power element is installed in the motor compartment, the top of the valve core has an axis part extending out of the valve cover and inserted into the motor compartment, and the rotating power element is transmission-connected to the axis part.

[0011] Preferably, one end of the branch exhaust pipe is connected to the sampling outlet through a one-way valve, and the other end is connected to the collection chamber.

[0012] Preferably, the water delivery mechanism includes a pump body, a water delivery pipeline, a rotary joint, a water vapor discharge pipe and a solenoid valve; the output end of the pump body is connected to the valve core channel through the water delivery pipeline, the water vapor discharge pipe is connected to the water delivery pipeline, and the solenoid valve is installed on the water vapor discharge pipe; the bottom of the valve core has a tube body portion extending out of the valve body, and the tube body portion is connected to the water delivery pipeline through a rotary joint.

[0013] Preferably, a flow meter is installed on the water delivery pipeline.

[0014] Preferably, the frame includes a bottom plate, a support column, and a top plate. The top plate is located directly above the bottom plate. The top plate and the bottom plate are fixedly connected via the support column. A lifting ear is fixed on the top plate. The top plate is located directly above the piston body, and the top plate can limit the piston body from detaching from the collection container.

[0015] Preferably, a clamping seat corresponding to each sampling container is fixed on the bottom plate. The bottom of the sampling container is clamped in the clamping seat. A limiting ring plate is movably installed on the support column. A bayonet corresponding to each sampling container is provided on the limiting ring plate. The upper end of the sampling container is clamped with the bayonet. A guide sleeve is fixed on the limiting ring plate. The guide sleeve is slidably connected with the support column. A set screw is installed on the guide sleeve in a threaded manner. The guide sleeve is fixedly connected with the support column through the set screw.

[0016] Compared with the prior art, the technical solution has at least one of the following beneficial effects: The seawater at a preset depth underwater is pumped into the water delivery pipeline, the valve core channel, the sewage connection port, the branch sewage pipeline, and the collection chamber through the pump body, so that the water remaining in the water delivery pipeline and the valve core channel is the seawater at the preset depth. After the rotary power element drives the valve core to rotate, the valve core channel is communicated with the adjacent sampling connection port. The pump body pumps the seawater at a preset depth underwater into the water delivery pipeline, the valve core channel, the sampling connection port, the branch sampling pipeline, and the sampling container. The gas in the sampling container enters the collection chamber through the branch exhaust pipeline, thereby reducing the cross-contamination rate between water samples at different depths and enabling efficient sampling of water samples at multiple depths. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional view of the seawater sampling device according to an embodiment of the present invention Figure 1 ; Figure 2 is a three-dimensional view of the seawater sampling device according to an embodiment of the present invention Figure 2 ; Figure 3 is a front view of the seawater sampling device according to an embodiment of the present invention; Figure 4 is Figure 3 a sectional view taken along line A-A in Figure 5 is a sectional view of the seawater sampling device according to an embodiment of the present invention Figure 1 ; Figure 6 is a sectional view of the seawater sampling device according to an embodiment of the present invention Figure 2 ; Figure 7 is Figure 5 a partial enlarged view of B in Figure 8 is a three-dimensional view of the seawater sampling device according to an embodiment of the present invention Figure 3 (omitting components such as sampling containers); In the figure, 1 is the frame body; 11 is the bottom plate; 12 is the support column; 13 is the top plate; 14 is the lifting lug; 15 is the clamping seat; 16 is the limit ring plate; 161 is the bayonet; 17 is the guide sleeve; 18 is the set screw; 2 is the sampling container; 21 is the sampling inlet; 22 is the sampling outlet; 23 is the first manual valve; 24 is the sampling connecting pipe; 25 is the quick connector; 3 is the multi-way valve assembly; 31 is the valve body; 311 is the sampling communication port; 312 is the sewage discharge communication port; 32 is the valve core; 321 is the valve core channel; 322 is the shaft body part; 323 is the pipe body part; 33 is the rotary power element; 34 is the valve cover; 35 is the motor chamber; 4 is the collection mechanism; 41 is the collection container; 411 is the air inlet; 412 is the water and gas discharge port; 42 is the piston body; 43 is the collection chamber; 5 is the branch exhaust pipe; 6 is the one-way valve; 7 is the branch sampling pipe; 8 is the branch sewage pipe; 9 is the water delivery mechanism; 91 is the pump body; 92 is the water delivery pipe; 93 is the rotary joint; 94 is the water and gas discharge pipe; 95 is the solenoid valve; 96 is the flow meter; 97 is the sampling inlet pipe; 98 is the filter screen; 99 is the protective shell. Detailed implementation manners

[0018] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0019] Please refer to Figures 1 to 8 , an embodiment of the present application provides a seawater sampling device, including a frame body 1, a sampling container 2, a multi-way valve assembly 3, a collection mechanism 4, a branch exhaust pipe 5, a branch sampling pipe 7, a branch sewage pipe 8, and a water delivery mechanism 9.

[0020] Among them, the sampling container 2 is detachably installed on the frame body 1. Nine sampling containers 2 are provided and are evenly distributed in a circle. During sampling, the sampling container 2 is installed on the frame body 1. After sampling is completed, the sampling container 2 is detached from the frame body 1. The sampling container 2 has a sampling inlet 21 and a sampling outlet 22. The sampling container 2 is in the shape of a bottle body, with a dome protruding upward at the top, and the upper end of the sampling inlet 21 is located directly above the dome. The sampling container 2 is made of pressure-resistant titanium alloy, and the capacity and pressure resistance level can be flexibly designed according to the diving depth.

[0021] As Figure 4As shown, the multi-way valve assembly 3 includes a valve body 31, a valve core 32, and a rotary power element 33. The valve body 31 is fixed to the frame body 1. The valve core 32 is located inside the valve body 31 and is rotationally and sealingly connected to the valve body 31. The side surface of the valve core 32 is in sliding and sealing contact with the inner wall of the valve body 31. Sampling communication ports 311 and sewage discharge communication ports 312 are circumferentially arranged on the valve body 31 at intervals. The numbers of the sampling communication ports 311 and the sewage discharge communication ports 312 are the same as the number of sampling containers 2, both are set to nine, and the adjacent sampling communication ports 311 and sewage discharge communication ports 312 are spaced 20 degrees apart. As Figure 4 and Figure 7 shown, a valve core channel 321 is provided inside the valve core 32; the valve core channel 321 is an L-shaped through hole, including an axial section and a radial section. The axial section is coaxially connected to the water delivery pipe 92, and the radial section can be rotated to align with the sampling communication port 311 or the sewage discharge communication port 312. As Figure 5 and Figure 6 shown, the rotary power element 33 is fixed to the frame body 1. The rotary power element 33 is a stepping motor equipped with a worm and worm gear reducer, or a servo motor can also be selected. The output end of the rotary power element 33 is connected to the valve core 32. The rotary power element 33 can drive the valve core 32 to rotate a preset angle so that the valve core channel 321 selectively communicates with the sampling communication port 311 or the sewage discharge communication port 312; the rotary power element 33 will drive the valve core 32 to rotate unidirectionally in the clockwise or counterclockwise direction, rotating 20 degrees each time. After the valve core channel 321 communicates with one of the sewage discharge communication ports 312, the next time it will communicate with an adjacent sampling communication port 311, and the next time it will communicate with another adjacent sewage discharge communication port 312.

[0022] As Figure 5 and Figure 6 shown, the collection mechanism 4 includes a collection container 41 and a piston body 42. The collection container 41 is fixedly connected to the frame body 1; the piston body 42 is slidably and sealingly installed in the collection container 41 and can jointly form a sealed collection chamber 43 with the collection container 41; the collection container 41 is fixedly connected to the frame body 1; the inner cavity of the collection container 41 is an annular cavity and the top is open. The piston body 42 is in the shape of a ring adapted to the inner cavity of the collection container 41. The piston body 42 is slidably and sealingly installed in the collection container 41 and can jointly form a sealed collection chamber 43 with the collection container 41; the top of the collection chamber 43 is the bottom of the piston body 42; by installing a sliding sealing ring on the outer wall of the piston body 42, the sliding and sealing connection between the piston body 42 and the collection container 41 is realized.

[0023] The height of the piston body 42 is the same as the height of the inner cavity of the collection container 41, or slightly higher than the height of the inner cavity of the collection container 41. In this way, no water storage groove will be formed between the top of the piston body 42 and the inner cavity of the collection container 41, avoiding affecting the sampling accuracy.

[0024] One end of the branch exhaust pipeline 5 is connected to the sampling outlet 22 through a one-way valve 6, and the other end is communicated with the collection chamber 43; the gas in the sampling container 2 can enter the collection chamber 43 through the branch exhaust pipeline 5. By setting the one-way valve 6, the fluid in the collection chamber 43 can be prevented from flowing back to the sampling outlet 22 and the sampling container 2.

[0025] The branch exhaust pipeline 5 is set as an armored hose. Both ends of the one-way valve 6 are connected to the branch exhaust pipeline 5 and the sampling outlet 22 through threads. After the sampling container 2 completes sampling and is removed from the frame 1 and transferred to the testing laboratory, the one-way valve 6 can be removed, and the sample in the sampling container 2 can be exported through the sampling outlet 22.

[0026] The branch sampling pipeline 7 is communicated with the sampling communication port 311 and the sampling inlet 21; when the valve core channel 321 is communicated with the sampling communication port 311, the fluid will be introduced into the sampling inlet 21 through the branch sampling pipeline 7.

[0027] The branch sewage discharge pipeline 8 is communicated with the sewage discharge communication port 312 and the collection chamber 43; when the valve core channel 321 is communicated with the sewage discharge communication port 312, the fluid will be introduced into the collection chamber 43 through the branch sewage discharge pipeline 8.

[0028] The water delivery mechanism 9 includes a pump body 91 and a water delivery pipeline 92. The output end of the pump body 91 is communicated with the valve core channel 321 through the water delivery pipeline 92. The pump body 91 is fixedly connected to the frame 1. The pump body 91 is a peristaltic pump, and the pump body 91 pumps seawater to the valve core channel 321 through the water delivery pipeline 92.

[0029] In the initial state of the seawater sampling device of this embodiment, the valve core channel 321 is communicated with one of the sewage discharge communication ports 312; the sampling steps are as follows: S1, use the suspension method, ROV or deep-sea sample shuttle transfer system to carry the seawater sampling device to a preset depth underwater; S2, when reaching the preset depth underwater, since the seawater at a depth other than the preset depth underwater may remain in the water inlet of the pump body 91 during the descent process, it is necessary to empty it; specifically, the pump body 91 works to pump the seawater at the preset depth underwater to the water delivery pipeline 92, the valve core channel 321, the sewage discharge communication port 312, the branch sewage discharge pipeline 8, and the collection chamber 43. After the water is stored in the collection chamber 43, the water pressure will push up the piston body 42, and the water pressure should overcome the sum of the gravity and friction force suffered by the movement of the piston body 42; S3. After the pump body 91 operates for a preset time, the rotary power element 33 drives the valve core 32 to rotate 20 degrees, so that the valve core channel 321 communicates with the adjacent sampling connection port 311. The pump body 91 pumps seawater at a preset depth underwater to the water delivery pipeline 92, the valve core channel 321, the sampling connection port 311, the branch sampling pipeline 7, and the sampling container 2. The gas in the sampling container 2 enters the collection chamber 43 through the branch exhaust pipeline 5. At this time, the outer wall of the valve core 32 closes each sewage connection port 312, so that the water and gas in the collection chamber 43 will not leak, avoiding affecting the sampling accuracy. S4. After sampling is completed, the rotary power element 33 drives the valve core 32 to rotate 20 degrees again, so that the valve core channel 321 communicates with the next adjacent sewage connection port 312. The drive motor of the pump body 91 operates in reverse to pump water from the collection chamber 43, which enters the water delivery pipeline 92 through the branch sewage pipeline 8, the sewage connection port 312, and the valve core channel 321. The pump body 91 discharges the water and gas in the collection chamber 43. S5. Repeat S1 to move this device to seawater at the next preset depth. S6. When this device moves to seawater at the next preset depth, seawater at other depths may remain in the valve core channel 321 and the water delivery pipeline 92 and needs to be cleaned. Repeat step S2 to clean the valve core channel 321 and the water delivery pipeline 92. S7. Repeat S3 to achieve sampling of the next sampling container 2. S8. Repeat S4 to achieve the discharge of the water and gas in the collection chamber 43. S9. Repeat S5 - S8 until the sampling target is completed. S10. Use the suspension method, ROV or deep - sea sample shuttle transfer system to carry the seawater sampling device to the sea, take out the sampling container 2, and complete the sampling operation.

[0030] The seawater sampling device of this embodiment is provided with a PLC controller, which is electrically connected to each electrical component in the seawater sampling device of this embodiment to control the operation of each electrical component. The PLC controller can be hermetically installed on the frame 1 and dive together, and is connected to the offshore control terminal through a cable.

[0031] In a preferred embodiment, to facilitate the connection between the branch exhaust pipeline 5 and the collection chamber 43, as Figure 5 shown, an air inlet 411 corresponding to each sampling container 2 is provided at the bottom of the collection container 41. The sampling outlet 22 communicates with the air inlet 411 through the branch exhaust pipeline 5. To facilitate the connection between the branch sewage pipeline 8 and the collection chamber 43, a water - and - gas discharge outlet 412 corresponding to each sewage connection port 312 is provided at the bottom of the collection container 41. The water - and - gas discharge outlet 412 communicates with the sewage connection port 312 through the branch sewage pipeline 8.

[0032] In a preferred embodiment, in order to facilitate the separation of the sampling container 2 from the branch sampling pipeline 7, as shown in FIG. Figure 1 , Figure 3 and 5 As shown, a first manual valve 23 and a sampling connection pipe 24 are sequentially connected between the sampling inlet 21 and the branch sampling pipeline 7, and the sampling connection pipe 24 and the branch sampling pipeline 7 are connected by a quick connector 25, and the sampling connection pipe 24 and the branch sampling pipeline 7 are armored hoses. The quick connector 25 is composed of a male connector and a female connector. The sampling connection pipe 24 is fixedly connected to the male connector of the quick connector 25, and the branch sampling pipeline 7 is fixedly connected to the female connector of the quick connector 25. A quick connector 25 can also be installed between the one-way valve 6 and the branch exhaust pipeline 5, so as to quickly separate the one-way valve 6 from the branch exhaust pipeline 5.

[0033] When sampling, before going into the sea, the first manual valve 23 is fully opened; before separating the sampling container 2 from the branch sampling pipeline 7, the first manual valve 23 is fully closed. Since the one-way valve 6 closes the sampling outlet 22 and the first manual valve 23 closes the sampling inlet 21, the inner cavity of the sampling container 2 can be kept closed. In another embodiment, a second manual valve can be installed between the one-way valve 6 and the sampling outlet 22. When sampling, before going into the sea, the first manual valve 23 and the second manual valve are fully opened; before separating the sampling container 2 from the branch sampling pipeline 7, the first manual valve 23 and the second manual valve are fully closed. The sampling outlet 22 is closed by the second manual valve, and the sampling inlet 21 is closed by the first manual valve 23, so that the inner cavity of the sampling container 2 can be kept closed; when disassembling the sampling container 2, the second manual valve is closed first, and then the one-way valve 6 is removed to ensure double-stage sealing.

[0034] In a preferred embodiment, to facilitate installation of the valve core 32, as shown in FIG. Figure 7 As shown, the multi-way valve assembly 3 further includes a valve cover 34 , which is fixedly connected to the valve body 31 by screws, and the valve core 32 is located in a space enclosed by the valve cover 34 and the valve body 31 .

[0035] To facilitate the installation of the rotating power element 33, as Figures 5 to 7 As shown, a motor bin 35 is fixed on the valve cover 34, and the motor bin 35 is fixedly connected to the frame 1, so that the rotating power element 33, the valve cover 34 and the valve body 31 are all fixed to the frame 1; the rotating power element 33 is installed in the motor bin 35, and the valve cover 34 closes the bottom of the motor bin 35, so that the inner cavity of the motor bin 35 remains sealed, thereby isolating the rotating power element 33 from seawater and preventing the rotating power element 33 from contacting with seawater; the top of the valve core 32 has a shaft body portion 322 extending from the valve cover 34 and inserted into the motor bin 35, and the rotating power element 33 is transmission-connected to the shaft body portion 322 via a coupling.

[0036] In a preferred embodiment, to facilitate maintaining a good communication relationship between the valve core 32 and the water delivery pipeline 92 during the rotation of the valve core 32, as Figure 7 shown, a pipe body portion 323 extending out of the valve body 31 is provided at the bottom of the valve core 32. The pipe body portion 323 is communicated with the valve core passage 321, and the lower end of the pipe body portion 323 is communicated with the water delivery pipeline 92 through a rotary joint 93.

[0037] In a preferred embodiment, to prevent the water and gas in the collection chamber 43 from being discharged through the pump body 91, as Figure 8 shown, a water and gas discharge pipe 94 is connected to the water delivery pipeline 92 through a tee, and a solenoid valve 95 is installed on the water and gas discharge pipe 94.

[0038] The piston body 42 has a certain weight, and the gravity of the piston body 42 is greater than the sum of its buoyancy and the friction force between the collection container 41, that is, the piston body 42 has a tendency to move downward to compress the collection chamber 43.

[0039] The structure of the piston body 42 can be specifically set to include an open-top hollow ring shell and a load filled inside the hollow ring shell; the piston body 42 can also play a role of counterweight, making the overall gravity of the seawater sampling device in this embodiment greater than its buoyancy, which is convenient for diving underwater.

[0040] By providing the water and gas discharge pipe 94 and the solenoid valve 95, when it is necessary to discharge the water and gas in the collection chamber 43, the drive motor of the object pump body 91 operates in reverse, and the solenoid valve 95 can be directly opened. In this way, the water and gas in the collection chamber 43, under the downward pressure of the piston body 42, enter the water delivery pipeline 92 through the branch sewage pipeline 8, the sewage communication port 312, and the valve core passage 321, and are discharged through the water and gas discharge pipe 94.

[0041] In a preferred embodiment, to improve the accuracy of the sampling volume, as Figure 6 and Figure 8 shown, a flow meter 96 is installed on the water delivery pipeline 92. The flow meter 96 is in closed-loop control with the peristaltic pump. The flow meter 96 of the peristaltic pump is calculated based on the "linear flow - rotation speed curve" of the armored hose. However, the elasticity of the new armored hose, the deformation after aging, and the expansion or contraction of the armored hose caused by temperature changes will all cause the actual flow to deviate from the preset value, and the flow meter 96 can calibrate this deviation in real time. The liquid containing particles or the gas - liquid mixed fluid will change the extrusion resistance of the armored hose, resulting in flow fluctuations, and the flow meter 96 can dynamically compensate for the influence of non - ideal fluids.

[0042] In a preferred embodiment, as Figure 1As shown in the figure, the frame body 1 includes a bottom plate 11, support columns 12, and a top plate 13. The top plate 13 is located directly above the bottom plate 11, and the top plate 13 is fixedly connected to the bottom plate 11 through the support columns 12. The top plate 13 is located directly above the piston body 42, and the top plate 13 can prevent the piston body 42 from detaching from the collection container 41. The piston body 42 rises under the pressure of continuously introduced water and gas in the collection chamber 43. Setting the top plate 13 can play an insurance role. The top plate 13 can block the piston body 42 to prevent the piston body 42 from detaching from the collection container 41. A lifting lug 14 is fixed on the top plate 13, which is convenient for connecting the sling of the suspension device for suspended sea entry. The pump body 91 is installed on the bottom plate 11, and a plurality of feet are fixed at the lower end of the bottom plate 11.

[0043] To facilitate the installation of the sampling container 2, as Figure 1 and Figure 8 shown, a card seat 15 corresponding to the sampling container 2 is fixed on the bottom plate 11. The inner side of the card seat 15 has a circular card slot, and the bottom of the sampling container 2 is clamped in the card slot on the inner side of the card seat 15; a limiting ring plate 16 is movably installed on the support column 12. A bayonet 161 corresponding to the sampling container 2 is opened on the limiting ring plate 16. The inner diameter of the bayonet 161 is smaller than the maximum outer diameter of the sampling container 2. The dome at the upper end of the sampling container 2 will be clamped with the bayonet 161. A guide sleeve 17 is fixed on the limiting ring plate 16. The guide sleeve 17 is slidably connected to the support column 12. A set screw 18 is threadedly installed on the guide sleeve 17. The guide sleeve 17 is fixedly connected to the support column 12 through the set screw 18. By rotating the set screw 18, the set screw 18 no longer presses and fixes the support column 12, and then the limiting ring plate 16 is pushed upward to make the limiting ring plate 16 away from the sampling container 2. Then, the set screw 18 is rotated in the reverse direction to make the set screw 18 press and fix the support column 12. Subsequently, the sampling container 2 can be lifted to make the sampling container 2 leave the card seat 15.

[0044] In a preferred embodiment, to prevent the seawater sample entering from the sampling inlet 21 from splashing into the sampling outlet 22, as Figure 5 and Figure 6 shown, the lower end of the sampling inlet 21 extends to the middle and lower part of the inner cavity of the sampling container 2. The sampling outlet 22 is located in the upper part of the sampling container 2, lower than the lower end of the sampling inlet 21, which can prevent the seawater sample entering from the sampling inlet 21 from splashing into the sampling outlet 22.

[0045] In a preferred embodiment, to prevent large particle impurities from entering the input port of the pump body 91, as Figure 6 and Figure 8 shown, a sampling inlet pipe 97 is installed at the input end of the pump body 91, and a filter screen 98 is installed at the input end of the sampling inlet pipe 97. The inner diameter of the filter holes of the filter screen 98 can be determined according to the sampling target to prevent the filter screen 98 from intercepting the components to be sampled and detected.

[0046] To protect the peristaltic pump and prevent the pump body 91 from contacting seawater, a protective shell 99 is also provided. The protective shell 99 is fixedly connected to the frame 1, and the protective shell 99 and the frame 1 form a sealed space. The pump body 91 is installed in this sealed space. The input end of the sampling and injection pipe 97 extends out of the protective shell 99 and is connected to the filter screen 98. The connection between the sampling and injection pipe 97 and the protective shell 99 is kept sealed, and the connection between the water delivery pipe 92 and the protective shell 99 is kept sealed.

[0047] In a preferred embodiment, a pressure sensor for detecting the water depth can also be installed on the frame 1 to detect the underwater depth where the seawater sampling device is located.

[0048] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0049] The above embodiments only represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

[0050] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0051] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0052] In the present invention, unless otherwise clearly defined or limited, the terms "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A seawater sampling device, comprising: Frame (1); A sampling container (2) having a sampling inlet (21) and a sampling outlet (22); A multi-way valve assembly (3) comprises a valve body (31), a valve core (32) and a rotating power element (33); the valve core (32) is located inside the valve body (31) and is rotationally sealed with the valve body (31); a valve core channel (321) is provided inside the valve core (32); and the rotating power element (33) is used to drive the valve core (32) to rotate; The water delivery mechanism (9) comprises a pump body (91) and a water delivery pipeline (92), wherein the pump body (91) provides power and delivers water to the valve core channel (321) through the water delivery pipeline (92); The invention is characterized in that the valve body (31) is provided with sampling communication ports (311) and sewage discharge communication ports (312) which are spaced apart from each other in the circumferential direction; the valve core channel (321) can be selectively connected to the sampling communication port (311) or the sewage discharge communication port (312); and further comprises: The collecting mechanism (4) comprises a collecting container (41) and a piston body (42); the piston body (42) is slidably and sealingly mounted in the collecting container (41) and can form a sealed collecting chamber (43) together with the collecting container (41); A branch exhaust pipe (5) unidirectionally connected to the sampling outlet (22) and the collection chamber (43); A branch sampling pipeline (7) connecting the sampling connection port (311) and the sampling injection port (21); The branch sewage pipe (8) connects the sewage connection port (312) and the collection chamber (43).

2. The seawater sampling device according to claim 1, characterized in that: The bottom of the collecting container (41) is provided with an air inlet (411) corresponding one-to-one to the sampling container (2), and the sampling outlet (22) is connected to the air inlet (411) via a branch exhaust pipe (5); the bottom of the collecting container (41) is provided with a water vapor outlet (412) corresponding one-to-one to the sewage discharge connection port (312), and the water vapor outlet (412) is connected to the sewage discharge connection port (312) via a branch sewage discharge pipe (8).

3. The seawater sampling device according to claim 1, characterized in that: A first manual valve (23) and a sampling connection pipe (24) are sequentially connected between the sampling inlet (21) and the branch sampling pipeline (7), and the sampling connection pipe (24) and the branch sampling pipeline (7) are connected via a quick connector (25).

4. The seawater sampling device according to claim 1, characterized in that: The multi-way valve assembly (3) further comprises a valve cover (34), the valve cover (34) being fixedly connected to the valve body (31), and the valve core (32) being located in a space enclosed by the valve cover (34) and the valve body (31).

5. The seawater sampling device according to claim 4, characterized in that: A motor compartment (35) is fixed on the valve cover (34), the motor compartment (35) is fixedly connected to the frame (1), the rotating power element (33) is installed in the motor compartment (35), the top of the valve core (32) has a shaft portion (322) extending out of the valve cover (34) and inserted into the motor compartment (35), and the rotating power element (33) is drivingly connected to the shaft portion (322).

6. The seawater sampling device according to claim 1, characterized in that: One end of the branch exhaust pipe (5) is connected to the sampling outlet (22) via a one-way valve (6), and the other end is communicated with the collection chamber (43).

7. The seawater sampling device according to claim 1, characterized in that: The water delivery mechanism (9) further comprises a rotating joint (93), a water vapor discharge pipe (94) and a solenoid valve (95); the output end of the pump body (91) is connected to the valve core channel (321) via a water delivery pipe (92); the water vapor discharge pipe (94) is connected to the water delivery pipe (92); the solenoid valve (95) is installed on the water vapor discharge pipe (94); the bottom of the valve core (32) comprises a tube body portion (323) extending out of the valve body (31); the tube body portion (323) is connected to the water delivery pipe (92) via the rotating joint (93).

8. The seawater sampling device according to claim 7, characterized in that: A flow meter (96) is installed on the water delivery pipeline (92).

9. The seawater sampling device according to claim 1, characterized in that: The frame (1) comprises a bottom plate (11), a support column (12), and a top plate (13); the top plate (13) is located directly above the bottom plate (11); the top plate (13) and the bottom plate (11) are fixedly connected via the support column (12); a lifting lug (14) is fixed to the top plate (13); the top plate (13) is located directly above the piston body (42); and the top plate (13) can limit the piston body (42) from being separated from the collection container (41).

10. The seawater sampling device according to claim 9, characterized in that: A holder (15) corresponding to the sampling container (2) is fixed on the bottom plate (11), and the bottom of the sampling container (2) is clamped in the holder (15). A limit ring plate (16) is movably mounted on the support column (12), and a clamping hole (161) corresponding to the sampling container (2) is formed on the limit ring plate (16), and the upper end of the sampling container (2) is clamped with the clamping hole (161). A guide sleeve (17) is fixed on the limit ring plate (16), and the guide sleeve (17) is slidably connected to the support column (12). A set screw (18) is threadedly mounted on the guide sleeve (17), and the guide sleeve (17) is fixedly connected to the support column (12) via the set screw (18).

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