A filtering sampling device for marine environment monitoring

Abstract

The present invention discloses a filtering sampling device for marine environment monitoring, and relates to the technical field of marine environment monitoring. It comprises a tank body, a base and a cover body, wherein the tank body is sealed and fixedly connected to the top of the base, the cover body is movably connected and sealed to cover the top of the tank body, and an operating lifting frame is provided on the side of the tank body; a mounting ear plate is provided inside the tank body, and a filter screen is provided on the mounting ear plate; a fixed orifice plate is provided in the middle of the tank body, and a funnel-shaped funnel plate is provided between the fixed orifice plate and the mounting ear plate, and a connecting branch pipe is provided at the bottom of the funnel plate, and a multi-pass piece 2 is provided at the bottom end of the connecting branch pipe; a control box is provided on the fixed orifice plate, and a multi-pass piece 1 is provided at the bottom of the fixed orifice plate; a sampling bottle is provided between the fixed orifice plate and the base. The filtering sampling device for marine environment monitoring of the present invention can effectively prevent the filter plate from falling off during the seawater sampling process, causing marine garbage and the like to enter the sampled seawater sample, resulting in deviations in the detection results, and can complete the sampling of seawater samples at multiple locations.

Description

Technical Field

[0001] The invention relates to the technical field of marine environment monitoring, and more specifically, to a filtering sampling device for marine environment monitoring. Background Art

[0002] The marine environment refers to the total water area of ​​the vast and continuous seas and oceans on the earth, including seawater, substances dissolved and suspended in seawater, seabed sediments and marine life. It is the cradle of life and a treasure house of human resources. As the scale of human development of marine resources expands, it has been affected and polluted by human activities. In order to protect the marine environment, it is necessary to monitor the marine environment.

[0003] Marine environmental monitoring includes the monitoring of meteorological elements above water and / or the monitoring of hydrological and water quality elements underwater. By monitoring marine environmental elements, we can understand the types and concentrations of pollutants in the sea area and the migration and transformation patterns of pollutants in the marine environment, so as to propose technologies and measures to prevent and control pollution. Marine environmental monitoring is of great significance to the development of coastal economy, marine scientific research, reducing marine environmental disasters, and improving coastal maritime defense capabilities.

[0004] The main function of the marine environment monitoring sample collection equipment is to obtain a certain amount of seawater, sediment or biological samples and conduct subsequent monitoring and analysis, so as to grasp the pollution degree of the marine environment. When conducting marine environment monitoring, the primary task is to collect seawater samples. In order to ensure the accuracy of seawater detection, the staff needs to take samples at different positions in the ocean. During the seawater sampling process, the device is directly inserted into the water and then the seawater is automatically poured in. Floating debris such as garbage in the seawater will also enter the sampling device. If it is directly poured out, part of the water sample will be lost. If too much is poured out, the water sample will not meet the detection requirements. Therefore, the present invention provides a filtering sampling device for marine environment monitoring. Summary of the invention

[0005] The purpose of the present invention is to provide a filtering sampling device for marine environment monitoring to solve the technical problems in the above-mentioned background technology.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a filtering sampling device for marine environment monitoring, comprising a tank body, a base and a cover body, wherein the tank body is sealed and fixedly connected to the top of the base, the cover body is movably connected and sealed to cover the top of the tank body, and an operating lifting frame is provided on the side of the tank body; a mounting ear plate is provided near the top of the tank body, and a detachable filter screen is provided on the mounting ear plate; a fixed orifice plate is provided in the middle of the tank body, a funnel-shaped funnel plate is provided between the fixed orifice plate and the mounting ear plate, a connecting branch pipe is provided at the bottom of the funnel plate, and a multi-pass piece 2 is provided at the bottom end of the connecting branch pipe; a control box is provided on the fixed orifice plate, and the A multi-channel piece 1 is provided at the bottom of the fixed orifice plate; the fixed orifice plate is provided with through holes; the multi-channel piece 1 is provided with a main air pipe and an exhaust hole, the multi-channel piece 2 is provided with a diversion port, and the exhaust hole and the diversion port are respectively provided with an exhaust pipe and a diversion pipe; a sampling bottle is provided between the fixed orifice plate and the base; the other ends of the exhaust pipe and the diversion pipe are connected to the sampling bottle; an exhaust channel is provided inside the operating lifting frame, and the main air pipe is connected to the exhaust channel; the operating lifting frame is provided with an exhaust port near the top that is connected to the exhaust channel; a control panel is provided on the top of the operating lifting frame, and a fixed wheel is provided at the bottom of the control panel, a pull rope is provided on the fixed wheel, and the other end of the pull rope is connected to the cover plate.

[0007] The present invention is further configured as follows: a fixedly connected fixing rod is provided on one side of the top of the cover body, and a fixedly connected through-hole convex plate is provided on the other side; a rotating seat is provided on the top of the tank body, and the rotating seat includes a fixed rotating rod, and both ends of the fixed rotating rod are rotatably connected to set a fixed rotating seat, and the fixed rotating seat is fixedly connected to the top of the tank body; a strong torsion spring is provided at the rotating connection between the fixed rotating rod and the fixed rotating seat; the fixed rod is fixedly connected to the fixed rotating rod, and under the action of the strong torsion spring, the cover body is covered on the top of the tank body for sealing; one end of the pull rope is tied to the through-hole convex plate.

[0008] The present invention is further configured as follows: the operating lifting frame comprises an outer bracket and an inner bracket, the inner bracket is installed in the top of the outer bracket and is slidably connected to the outer bracket, a mounting plate is provided on the bottom side of the outer bracket, and the operating lifting frame is detachably mounted on the side of the tank body through the mounting plate; a connected exhaust passage is provided inside the outer bracket and the inner bracket, a connecting air hole is provided on one side of the mounting plate of the outer bracket and is connected to the exhaust passage, the main air pipe passes through the tank body and the mounting plate and is connected to the connecting air hole; the exhaust port is provided on the side of the inner bracket near the top; a control panel is provided on the top of the inner bracket, triangular steel frames are provided on both sides of the bottom of the control panel, the fixed wheel is rotatably mounted on the triangular steel frame, the fixed wheel is also provided with a second turning handle, and the second turning handle is located on the outer side of the triangular steel frame on one side.

[0009] The present invention is further configured as follows: a lifting groove is provided on the side of the inner bracket, teeth are relatively provided in the lifting groove, and a gear meshing with the teeth is provided in the lifting groove; a rotating handle 1 is provided on the side of the outer bracket near the top, and the rotating handle 1 is fixedly connected to the gear; the control panel includes a display screen and a plurality of control buttons, and the control panel is electrically connected to the control box.

[0010] The present invention is further configured as follows: an automatic ball valve is provided on the connecting branch pipe, the second multi-way piece is provided with at least two diversion ports, and the diversion ports are provided with a second solenoid valve; the first multi-way piece is provided with the same number of exhaust holes as the number of diversion ports, and the exhaust hole is provided with a first solenoid valve; the first solenoid valve, the second solenoid valve, and the automatic ball valve are electrically connected to a control box, and a circuit board and a rechargeable power supply are provided in the control box.

[0011] The present invention is further configured such that the working states of the solenoid valve 1 and the solenoid valve 2 connected to the same sampling bottle are opened or closed at the same time.

[0012] The present invention is further configured as follows: a placement tube is provided on the top of the base for fixing the sampling bottle, a threaded nail is provided on the bottom of the placement tube, and a threaded hole matching the threaded nail is provided on the bottom of the sampling bottle.

[0013] The present invention is further configured as follows: a liquid inlet and an exhaust port are provided on the top of the sampling bottle, the liquid inlet is provided with a valve one, the exhaust port is provided with a valve two, the liquid inlet is connected to the diversion port through a diversion tube, and the exhaust port is connected to the exhaust hole through an exhaust pipe.

[0014] The present invention is further configured as follows: a bottle cap connected by threads is arranged on the top of the sampling bottle, and the liquid inlet bottle opening and the exhaust bottle opening are both arranged on the bottle cap.

[0015] In summary, the present invention has the following beneficial effects: 1. The filtering sampling device for marine environment monitoring of the present invention can sample seawater by manipulating the lifting frame, according to the sampling depth of the sampling water area, by turning the turning handle 1 to adjust the height of the manipulating lifting frame, and complete the sampling of seawater samples from the designated sampling bottle through the control panel control operation, and can complete the sampling of seawater samples from multiple locations. 2. The working states of the electromagnetic valve 1 and the electromagnetic valve 2 of the filtering sampling device for marine environment monitoring of the present invention connected to the same sampling bottle are opened or closed at the same time, and the air in the sampling bottle is discharged from the exhaust port after passing through the exhaust pipe, the main air pipe and the exhaust channel, so as to avoid the sampled seawater sample from entering the sampling bottle for collection due to the stability of the internal pressure. 3. The filtering sampling device for marine environment monitoring of the present invention can effectively prevent the filter plate from falling off during the seawater sampling process, causing marine garbage and the like to enter the sampled seawater sample, causing deviations in the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of a filtering sampling device for marine environment monitoring according to an embodiment of the present invention;

[0017] Figure 2 It is a structural diagram of a filtering sampling device for marine environment monitoring in an embodiment of the present invention;

[0018] Figure 3 This is a disassembled structural diagram of a filtering and sampling device for marine environment monitoring in an embodiment of the present invention;

[0019] Figure 4 is a schematic diagram of operating a lifting frame in an embodiment of the present invention;

[0020] Figure 5 is a schematic diagram of operating a lifting frame in an embodiment of the present invention;

[0021] Figure 6 Schematic diagram of the internal structure of the tank in an embodiment of the present invention;

[0022] Figure 7 is a second schematic diagram of a funnel plate and a multi-pass member in an embodiment of the present invention;

[0023] Figure 8 is a schematic diagram of a base in an embodiment of the present invention;

[0024] Fig. 9 Schematic diagram of a sampling bottle in an embodiment of the present invention.

[0025] In the figure: 1, tank body; 2, operating lifting frame; 3, base; 4, cover body; 5, sealing door; 6, pull rope; 7, control panel; 8, rotating seat; 9, fixed orifice plate; 10, control box; 11, automatic ball valve; 12, multi-way piece 1; 13, multi-way piece 2; 14, sampling bottle; 15, placement tube; 16, filter screen; 17, funnel plate; 18, connecting branch pipe; 19, shunt pipe; 20, main gas pipe; 21, perforation; 22, exhaust pipe; 23, screw nail; 24, installation ear plate; 41, Through-hole convex plate; 42, fixing rod; 121, exhaust hole; 122, solenoid valve 1; 131, diversion port; 132, solenoid valve 2; 141, bottle cap; 142, liquid inlet; 143, exhaust port; 144, valve 1; 145, valve 2; 146, threaded hole; 201, outer bracket; 202, inner bracket; 203, mounting plate; 204, connecting air hole; 205, turning handle 1; 206, turning handle 2; 207, lifting slot; 208, fixing wheel; 209, exhaust port. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-9 The present invention is described in further detail.

[0027] Embodiment: A filtering sampling device for marine environment monitoring, such as Figure 1-Figure 9As shown, it includes a tank body 1, a base 3 and a cover body 4. The tank body 1 is a hollow cylinder. The tank body 1 is sealed and fixedly connected to the top of the base 3 by welding, and the cover body 4 is movably connected and sealed to the top of the tank body 1. The outer shell of the filtering sampling device is formed by adopting the above method. The cover body 4 is sealed and covered on the top of the tank body 1. When it is necessary to sample the water area at the location of the filtering sampling device, the cover body 4 is opened for sampling. An operating lifting frame 2 is provided on the side of the tank body 1. By operating the lifting frame 2, the position of the tank body 1 in the vertical direction can be changed, and seawater at multiple depths in the vertical direction can be sampled. And a control panel 7 is provided on the top of the operating lifting frame 2, and the sampling of seawater samples is completed by controlling the control panel 7.

[0028] A mounting ear plate 24 is provided near the top of the tank body 1, and a detachable filter screen 16 is provided on the mounting ear plate 24. The filter screen 16 can filter garbage in the seawater to ensure the sample quality of the sampled seawater. Screw holes are provided around the filter screen 16 and around the top of the mounting enclosure. The filter screen 16 can be detachably installed on it by screws, which is convenient for disassembly and cleaning. The filter screen 16 can effectively prevent the filter plate from falling during the seawater sampling process, causing marine garbage to enter the sampled seawater sample and cause deviations in the test results. A fixed orifice plate 9 is provided in the middle of the tank body 1, and a funnel-shaped funnel plate 17 is provided between the fixed orifice plate 9 and the mounting ear plate 24. A connecting branch pipe 18 is provided at the bottom of the funnel plate 17, and a multi-pass piece 13 is provided at the bottom of the connecting branch pipe 18. The fixed orifice plate 9 and the funnel plate 17 are fixedly connected to the inner wall of the tank body 1. The fixed connection between the fixed orifice plate 9 and the tank body 1 can effectively support the internal structure. The fixed connection of the funnel plate 17 can prevent seawater from leaking along the inner wall of the tank body 1 and entering the interior of the tank body 1 to cause damage.

[0029] A control box 10 is provided on the fixed orifice plate 9, and a multi-pass piece 12 is provided at the bottom of the fixed orifice plate 9; the fixed orifice plate 9 is provided with a through hole 21; the multi-pass piece 12 is provided with a main air pipe 20 and an exhaust hole 121, and the multi-pass piece 2 13 is provided with a diversion port 131, and the exhaust hole 121 and the diversion port 131 are provided with an exhaust pipe 22 and a diversion pipe 19 respectively; a sampling bottle 14 is provided between the fixed orifice plate 9 and the base 3; the other end of the exhaust pipe 22 and the diversion pipe 19 are connected to the sampling bottle 14. In this embodiment, the number of the exhaust hole 121 and the diversion port 131 is 9, and the number of the perforations 21 is also 9. An exhaust channel is provided inside the operating lifting frame 2, and the main air pipe 20 is connected to the exhaust channel; the operating lifting frame 2 is provided with an exhaust port 209 near the top to communicate with the exhaust channel; the top of the operating lifting frame 2 is provided with a control panel 7, and the bottom of the control panel 7 is provided with a fixed wheel 208, and the fixed wheel 208 is provided with a pull rope 6, and the other end of the pull rope 6 is connected to the cover plate.

[0030] A fixed rod 42 is fixedly connected on one side of the top of the cover 4, and a through-hole convex plate 41 is fixedly connected on the other side. A rotating seat 8 is provided on the top of the tank body 1, and the rotating seat 8 includes a fixed rotating rod, and the two ends of the fixed rotating rod are rotatably connected to set a fixed rotating seat, and the fixed rotating seat is fixedly connected to the top of the tank body 1; a strong torsion spring is provided at the rotation connection between the fixed rotating rod and the fixed rotating seat. The rotating seat 8 is arranged at the top of the tank body 1 close to the control lifting frame, and the through-hole convex plate 41 is arranged on the side away from the control lifting frame, and the cover body 4 is opened by pulling the pull rope 6. The fixed rod 42 is fixedly connected to the fixed rotating rod, and the cover body 4 is covered on the top of the tank body 1 for sealing under the action of the strong torsion spring; one end of the pull rope 6 is tied to the through-hole convex plate 41. When sampling, the fixed wheel 208 is rotated to drive the rope to rotate the cover body 4 to open the filtering sampling device, and seawater enters for filtering sampling.

[0031] The operating lifting frame 2 includes an outer support 201 and an inner support 202. The inner support 202 is installed in the top of the outer support 201 and is slidably connected to the outer support 201. A mounting plate 203 is provided on the bottom side of the outer support 201. The operating lifting frame 2 can be detachably installed on the side of the tank body 1 through the mounting plate 203. The inner parts of the outer support 201 and the inner support 202 are provided with connected exhaust passages. A connecting air hole 204 is provided on one side of the outer support 201 where the mounting plate 203 is provided, which is connected to the exhaust passage. The main air pipe 20 passes through the tank body 1 and the mounting plate 203 and is connected to the connecting air hole 204. The exhaust port 209 is provided on the side of the inner support 202 near the top. The above scheme is adopted to connect the inside of the sampling bottle 14 with the outside. When the sampled seawater is injected into the sampling bottle 14, the air in the sampling bottle 14 is discharged from the exhaust port 209 after passing through the exhaust pipe 22, the main air pipe 20 and the exhaust passage, so as to avoid the sampled seawater sample from not being able to enter the sampling bottle 14 for collection due to the stability of the internal pressure.

[0032] The top of the inner bracket 202 is provided with a control panel 7, and the bottom two sides of the control panel 7 are provided with triangular steel frames, and the fixed wheel 208 is rotatably mounted on the triangular steel frame. The fixed wheel 208 is also provided with a second rotating handle 206, and the second rotating handle 206 is located on the outside of the triangular steel frame on one side. When sampling, the fixed wheel 208 is rotated by rotating the second rotating handle 206 to pull the drawstring 6 to open the cover 4, so that seawater can enter for sampling.

[0033] The side of the inner bracket 202 is provided with a lifting groove 207, and teeth are arranged in the lifting groove 207, and a gear meshing with the teeth is arranged in the lifting groove 207; the side of the outer bracket 201 is provided with a rotating handle 205 near the top, and the rotating handle 205 is fixedly connected to the gear. The gear is rotated by rotating the rotating handle 205, and the inner bracket 202 is driven by the meshing teeth to move and change the overall height of the control lifting frame, so as to sample the seawater at different vertical positions in the same water area. The control panel 7 includes a display screen and a plurality of control buttons, and the control panel 7 is electrically connected to the control box 10. The control is designed according to the needs of sampling, and the sampling process is controlled by the control buttons, and the sampling results, whether the sampling bottle 14 is sampled, etc. are displayed on the display screen.

[0034] The connecting branch pipe 18 is provided with an automatic ball valve 11, and the multi-way piece 13 is provided with at least two diversion ports 131, and the diversion port 131 is provided with a solenoid valve 132; the multi-way piece 12 is provided with the same number of exhaust holes 121 as the diversion ports 131, and the exhaust holes 121 are provided with a solenoid valve 122; the solenoid valve 122, the solenoid valve 132, and the automatic ball valve 11 are electrically connected to the control box 10, and the control box 10 is provided with a circuit board and a rechargeable power supply. The working state of the solenoid valve 122 and the solenoid valve 132 connected to the same sampling bottle 14 is to be opened or closed at the same time, and opening or closing at the same time can avoid the failure of seawater sampling due to the stability of the internal pressure. Closing at the same time can effectively prevent the backflow of the seawater sample in the sampling bottle 14. Each sampling bottle 14 is provided with a separate liquid level sensor to monitor the liquid level inside the sampling bottle 14. When the seawater sample in the sampling bottle 14 reaches a set liquid level, the liquid level sensor returns a signal value to the control box 10 to actively control the sampling of the sampling bottle 14 to stop.

[0035] The top of the base 3 is provided with a placement tube 15 for fixing the sampling bottle 14, the bottom of the placement tube 15 is provided with a threaded nail 23, and the bottom of the sampling bottle 14 is provided with a threaded hole 146 matching the threaded nail 23. The sampling bottle 14 is fixed to the top of the base 3 by the placement, which can prevent the sampling bottle 14 from tipping over due to the shaking of the filtering sampling device in the water caused by various external factors, and the occurrence of accidents such as leakage of seawater samples.

[0036] The top of the sampling bottle 14 is provided with a liquid inlet 142 and an exhaust port 143, the liquid inlet 142 is provided with a valve 144, the exhaust port 143 is provided with a valve 2 145, the liquid inlet 142 is connected to the diversion port 131 through the diversion tube 19, and the exhaust port 143 is connected to the exhaust hole 121 through the exhaust pipe 22. A threaded bottle cap 141 is provided on the top of the sampling bottle 14, and the liquid inlet 142 and the exhaust port 143 are both provided on the bottle cap 141. Valve 1 144 and valve 2 145 are manual valves that need to be opened or closed manually, which can effectively prevent the dumping and leakage of seawater samples, and at the same time facilitate the transfer, storage and detection of the sampled seawater samples.

[0037] Working principle: Before sampling seawater samples, the filtering sampling device for marine environment monitoring of the present invention adjusts the height of the control lifting frame by turning the turning handle 1 205 according to the sampling depth of the sampling water area, and then puts the tank body 1 into the seawater for sampling. When sampling, turn the turning handle 206 to make the pull rope 6 pull the cover body 4 to open the top of the filtering sampling device to allow seawater to enter, and then filter out marine garbage and the like through the filter screen 16, and then complete the sampling of the seawater sample of the designated sampling bottle 14 through the control operation of the control panel, and put the seawater sample into the designated sampling bottle 14. The working states of the solenoid valve 1 122 and the solenoid valve 2 132 connected to the same sampling bottle 14 are opened or closed at the same time, and each sampling bottle 14 is provided with a separate liquid level sensor to monitor the liquid level inside the sampling bottle 14. When the seawater sample inside the sampling bottle 14 reaches the set liquid level, the liquid level sensor returns a signal value to the control box 10 to actively control the sampling of the sampling bottle 14. During sampling, the air in the sampling bottle 14 is discharged from the exhaust port 209 after passing through the exhaust pipe 22, the main air pipe 20 and the exhaust channel. After the sampling is completed, the entire tank body 1 is removed from the seawater by manipulating the lifting frame, and then the sealed door 5 can be opened to take out the sampled sampling bottle 14 for transfer, storage and testing.

[0038] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A filtering sampling device for marine environment monitoring, comprising a tank body (1), a base (3) and a cover body (4), wherein the tank body (1) is sealed and fixedly connected to the top of the base (3), and the cover body (4) is movably connected and sealed to cover the top of the tank body (1), wherein: An operating lifting frame (2) is provided on the side of the tank body (1); a mounting ear plate (24) is provided near the top of the tank body (1), and a detachable filter screen (16) is provided on the mounting ear plate (24); a fixed orifice plate (9) is provided in the middle of the tank body (1), a funnel-shaped funnel plate (17) is provided between the fixed orifice plate (9) and the mounting ear plate (24), a connecting branch pipe (18) is provided at the bottom of the funnel plate (17), and a multi-pass piece (13) is provided at the bottom end of the connecting branch pipe (18); a control box (10) is provided on the fixed orifice plate (9), and a multi-pass piece (12) is provided at the bottom of the fixed orifice plate (9); the fixed orifice plate (9) is provided with a through hole (21); the multi-pass piece (12) is provided with a main air pipe (20) and an exhaust hole (121), and the The multi-channel member 2 (13) is provided with a diversion port (131), and the exhaust hole (121) and the diversion port (131) are provided with an exhaust pipe (22) and a diversion pipe (19) respectively; a sampling bottle (14) is provided between the fixed orifice plate (9) and the base (3); the other ends of the exhaust pipe (22) and the diversion pipe (19) are connected to the sampling bottle (14); an exhaust channel is provided inside the operating lifting frame (2), and the main air pipe (20) is connected to the exhaust channel; an exhaust port (209) is provided near the top of the operating lifting frame (2) and is connected to the exhaust channel; a control panel (7) is provided at the top of the operating lifting frame (2), and a fixed wheel (208) is provided at the bottom of the control panel (7), and a pull rope (6) is provided on the fixed wheel (208), and the other end of the pull rope (6) is connected to the cover plate.

2. A filtering sampling device for marine environment monitoring according to claim 1, characterized in that: A fixedly connected fixing rod (42) is provided on one side of the top of the cover body (4), and a fixedly connected through-hole convex plate (41) is provided on the other side; a rotating seat (8) is provided on the top of the tank body (1), and the rotating seat (8) includes a fixed rotating rod, and the two ends of the fixed rotating rod are rotatably connected to set a fixed rotating seat, and the fixed rotating seat is fixedly connected to the top of the tank body (1); a strong torsion spring is provided at the rotation connection between the fixed rotating rod and the fixed rotating seat; the fixing rod (42) is fixedly connected to the fixed rotating rod, and under the action of the strong torsion spring, the cover body (4) is covered on the top of the tank body (1) to be sealed; one end of the pull rope (6) is tied to the through-hole convex plate (41).

3. The filtering sampling device for marine environment monitoring according to claim 1 is characterized in that: The operating lifting frame (2) comprises an outer frame (201) and an inner frame (202); the inner frame (202) is mounted on the top of the outer frame (201) and is slidably connected to the outer frame (201); a mounting plate (203) is provided on the bottom side of the outer frame (201); the operating lifting frame (2) is detachably mounted on the side of the tank body (1) via the mounting plate (203); the outer frame (201) and the inner frame (202) are provided with a communicating exhaust passage inside; and a connecting member is provided on one side of the outer frame (201) where the mounting plate (203) is provided. The air hole (204) is communicated with the exhaust passage, and the main air pipe (20) passes through the tank body (1) and the mounting plate (203) and is connected to the connecting air hole (204); the exhaust port (209) is arranged on the side of the inner bracket (202) close to the top; a control panel (7) is arranged on the top of the inner bracket (202), and triangular steel frames are arranged on both sides of the bottom of the control panel (7), and the fixed wheel (208) is rotatably mounted on the triangular steel frame, and the fixed wheel (208) is also provided with a second turning handle (206), and the second turning handle (206) is located on the outer side of the triangular steel frame on one side.

4. A filtering sampling device for marine environment monitoring according to claim 3, characterized in that: The inner bracket (202) is provided with a lifting groove (207) on the side surface, and teeth are arranged in the lifting groove (207) opposite to each other, and a gear meshing with the teeth is arranged in the lifting groove (207); a rotating handle (205) is provided on the side surface of the outer bracket (201) near the top, and the rotating handle (205) is fixedly connected to the gear; the control panel (7) includes a display screen and a plurality of control buttons, and the control panel (7) is electrically connected to the control box (10).

5. The filtering sampling device for marine environment monitoring according to claim 1 is characterized in that: The connecting branch pipe (18) is provided with an automatic ball valve (11); the second multi-way piece (13) is provided with at least two diversion ports (131), and the diversion ports (131) are provided with a second solenoid valve (132); the first multi-way piece (12) is provided with the same number of exhaust holes (121) as the number of diversion ports (131), and the exhaust hole (121) is provided with a first solenoid valve (122); the first solenoid valve (122), the second solenoid valve (132), and the automatic ball valve (11) are electrically connected to a control box (10), and a circuit board and a rechargeable power supply are provided in the control box (10).

6. A filtering sampling device for marine environment monitoring according to claim 5, characterized in that: The working states of the electromagnetic valve 1 (122) and the electromagnetic valve 2 (132) connected to the same sampling bottle (14) are opened or closed at the same time.

7. The filtering sampling device for marine environment monitoring according to claim 1 is characterized in that: The top of the base (3) is provided with a placement tube (15) for fixing the sampling bottle (14), the bottom of the placement tube (15) is provided with a threaded nail (23), and the bottom of the sampling bottle (14) is provided with a threaded hole (146) matching the threaded nail (23).

8. A filtering sampling device for marine environment monitoring according to claim 7, characterized in that: The top of the sampling bottle (14) is provided with a liquid inlet (142) and an exhaust port (143); the liquid inlet (142) is provided with a valve 1 (144); the exhaust port (143) is provided with a valve 2 (145); the liquid inlet (142) is connected to the diversion port (131) via a diversion tube (19); the exhaust port (143) is connected to the exhaust hole (121) via an exhaust tube (22).

9. A filtering sampling device for marine environment monitoring according to claim 8, characterized in that: A bottle cap (141) connected by threads is disposed on the top of the sampling bottle (14), and the liquid inlet (142) and the exhaust port (143) are both disposed on the bottle cap (141).

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