CN115931443A

CN115931443A - Ocean water quality sampling device

Info

Publication number: CN115931443A
Application number: CN202211634367.XA
Authority: CN
Inventors: 陈立红; 张冬融; 钱健; 方欣
Original assignee: Second Institute of Oceanography MNR
Current assignee: Second Institute of Oceanography MNR
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-04-07

Abstract

The invention discloses an ocean water quality sampling device which comprises a bearing mechanism, wherein the bearing mechanism comprises a bearing device, a control assembly and a traction assembly are arranged on the bearing device, and the control assembly is electrically connected with the traction assembly; the sampling mechanism comprises a sampling cylinder in transmission connection with the traction assembly through a connecting rope, the sampling cylinder comprises a plurality of independently arranged sampling units, and the sampling units are in one-way communication through a communicating pipe; the separation mechanism comprises a separation net which is rotatably sleeved outside the sampling cylinder, the top end of the separation net is in transmission connection with the sampling cylinder through a driving assembly, and the bottom end of the separation net is detachably connected with the sampling cylinder through a positioning assembly; and the positioning mechanism is fixedly arranged at the bottom end of the sampling cylinder and is electrically connected with the control assembly. The invention has convenient use and high sampling efficiency, can conveniently carry out continuous sampling at different depths, reduces the mixing of samples, improves the sampling effect and reduces the sampling labor amount.

Description

Ocean water quality sampling device

Technical Field

The invention relates to the technical field of water quality sampling, in particular to an ocean water quality sampling device.

Background

Along with the rapid development of coastal city economy, the importance of deep sea energy development and research is gradually highlighted, and the importance of finding and exploring ocean oil and gas resources and microorganism resources is gradually increased; the problem of environmental quality pollution in offshore areas is gradually revealed, inorganic nitrogen, phosphate, heavy metal and the like exceed the standards, and the water body is in a certain eutrophication state; therefore, whether various resources in the ocean are developed or the seawater pollution is researched and treated, the sampling of the seawater is the basic work for the ocean research.

The most common method for sampling seawater in the prior art is a sampler sampling method, namely, a series of samplers are fixed on a steel wire rope on a ship, the samplers are placed into different depths after being opened, and after seawater samples flow in, signals are given to close the samplers, so that the seawater is sealed and stored, and then the samplers are lifted to the ship for experimental analysis. However, in the above sampling mode, the sampler can only perform single sampling at a specified depth, and the sampling at different depths in the same place needs to be repeated for many times, so that the workload is large and the sampling efficiency is low; meanwhile, the sampling interval time is long, so that the influence difference of samples at the same place is large, and the sampling reliability is reduced.

Therefore, it is necessary to design a marine water sampling device to solve the above technical problems.

Disclosure of Invention

The invention aims to provide an ocean water quality sampling device to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following scheme: the invention provides an ocean water quality sampling device, which comprises:

the bearing mechanism comprises a bearing device, a control assembly and a traction assembly are mounted on the bearing device, and the control assembly is electrically connected with the traction assembly;

the sampling mechanism comprises a sampling barrel in transmission connection with the traction assembly through a connecting rope, the sampling barrel comprises a plurality of sampling units which are independently arranged, and the sampling units are communicated in a one-way mode through a communicating pipe;

the separation mechanism comprises a separation net which is rotatably sleeved outside the sampling cylinder, the top end of the separation net is in transmission connection with the sampling cylinder through a driving assembly, and the bottom end of the separation net is detachably connected with the sampling cylinder through a supporting assembly;

the positioning mechanism is fixedly installed at the bottom end of the sampling cylinder and is electrically connected with the control assembly.

Preferably, the sampling unit comprises sample boxes, and a plurality of sample boxes are fixedly arranged end to end from top to bottom; the switch assembly is arranged on the outer wall of the sample box; the communicating pipe penetrates through the sample box and is communicated with the inner cavity of the sample box through a one-way assembly.

Preferably, the switch assembly comprises a plurality of water inlet holes penetrating through the outer wall of the sample box, the outer wall of the sample box is connected with a switch sleeve in a sliding manner, and the switch sleeve is arranged corresponding to the water inlet holes and is detachably connected with the water inlet holes; the outer wall threaded connection of switch cover has the switch screw rod, the output shaft transmission of switch screw rod and switching motor is connected, switching motor installs in the mounting panel bottom, the mounting panel rigid coupling is in the outer wall of sample box.

Preferably, the one-way assembly comprises a plurality of one-way holes formed in the communicating pipe, and one-way plugs are detachably connected in the one-way holes; one end of the one-way plug, which is far away from the one-way hole, is fixedly connected with a telescopic rod; the communicating pipe is fixedly connected with mounting frames which are correspondingly arranged up and down, a mounting frame is fixedly connected between the two mounting frames, and the telescopic rod is fixedly connected to the mounting frame; the telescopic link overcoat is equipped with one-way spring, one-way spring's both ends respectively with the mounting bracket with one-way stopper rigid coupling.

Preferably, the top end and the bottom end of the sampling tube are fixedly connected with an upper top plate and a lower bottom plate respectively, and the positioning mechanism is installed at the bottom end of the lower bottom plate; the driving assembly is installed in the upper top plate, and the supporting assembly is installed in the lower bottom plate.

Preferably, the driving assembly comprises a driving motor installed in the upper top plate, and an output end of the driving motor is in transmission connection with a driving gear; the bottom end of the upper top plate is provided with a driving groove, a driving ring is rotationally connected in the driving groove, and the driving ring is meshed with the driving gear; the top end of the separation net is detachably connected with the driving ring.

Preferably, the bottom end of the driving ring is provided with a connecting groove matched with the top end of the separation net, the side wall of the connecting groove is provided with a plurality of connecting holes, connecting blocks are connected in the connecting holes in a sliding manner, and the top ends of the connecting blocks extend out of the connecting holes and are detachably connected with the separation net; the side wall of the connecting block is hinged with a jacking rod, the other end of the jacking rod extends out of the driving ring and is vertically and fixedly connected with a contact rod, and the top end of the contact rod is detachably connected with the side wall of the separation net through a contact block.

Preferably, the supporting assembly comprises a positioning groove formed in the top end of the lower bottom plate, a positioning ring is connected in the positioning groove in a sliding mode, and the top end of the positioning ring is detachably connected with the bottom end of the separation net; and a plurality of positioning springs are fixedly connected between the bottom end of the positioning ring and the bottom end of the positioning groove.

Preferably, the positioning mechanism comprises a positioning shell installed at the bottom end of the lower bottom plate, a positioning assembly is installed in the positioning shell, and the positioning assembly is electrically connected with the control assembly; and a balancing weight is installed at the bottom end of the positioning shell.

Preferably, a plurality of air bags are mounted at the top end of the upper top plate, air pipes of the air bags are arranged along the connecting rope, and the air pipes are communicated with an air compressor on the bearing device; the gas tube has elasticity.

The invention discloses the following technical effects: the invention discloses an ocean water quality sampling device, which is mainly used for solving the problem that the existing ocean water quality sampling device cannot realize continuous sampling, improving the sampling efficiency and reducing the sampling labor amount; the device comprises a sampling device, a traction assembly, a control assembly, a sampling mechanism, a bearing device of the bearing mechanism, a traction assembly and a control assembly, wherein the bearing device of the bearing mechanism is used as a base of the device and used for bearing the sampling device to a sampling place; the sampling cylinder of the sampling mechanism is in transmission connection with the traction assembly through a connecting rope, and the lifting of the sampling mechanism is controlled through the connecting rope, so that the seawater at different depths can be conveniently sampled; the sampling cylinder comprises a plurality of independent sampling units, so that the seawater at different depths can be continuously sampled conveniently, the samples are prevented from being mixed, and the sampling precision is improved; the separation net of the separation mechanism is rotatably sleeved outside the sampling cylinder, so that sundries and aquatic organisms in seawater can be prevented from blocking the sampling unit, the intercepted sundries are thrown away by the rotating separation net, the sundries are prevented from being attached to the separation net, the effect of the separation net is improved, and the service life of the separation net is prolonged; positioning mechanism is used for carrying out the counter weight to the sampler barrel, fixes a position the position and the all ring edge borders of sampler barrel simultaneously, and convenient more accurate location sampling degree of depth. The invention has convenient use and high sampling efficiency, can conveniently carry out continuous sampling at different depths, reduces the mixing of samples, improves the sampling effect and reduces the sampling labor amount.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of the marine water sampling apparatus of the present invention;

FIG. 2 is a schematic structural view of a sampling mechanism according to the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is an enlarged view of a portion B of FIG. 2 according to the present invention;

FIG. 5 is an enlarged view of a portion C of FIG. 2 in accordance with the present invention;

FIG. 6 is an enlarged view of a portion E of FIG. 5 in accordance with the present invention;

FIG. 7 is an enlarged view of a portion D of FIG. 2 in accordance with the present invention;

wherein, 1, a bearing mechanism; 2. a sampling mechanism; 3. a separation mechanism; 4. a positioning mechanism; 11. a carrying device; 12. a control component; 13. a traction assembly; 14. an air compressor; 15. an air tube; 16. connecting ropes; 21. a sampling tube; 22. a communicating pipe; 23. a sample cartridge; 24. a water inlet hole; 25. a switch cover; 26. switching a screw rod; 27. switching the motor; 28. mounting a plate; 29. a one-way hole; 210. a one-way plug; 211. a telescopic rod; 212. installing a frame; 213. a mounting frame; 214. a one-way spring; 215. sealing sleeves; 216. an upper top plate; 217. a lower base plate; 218. an air bag; 219. a water outlet pipe; 31. a separation net; 32. a drive motor; 33. a drive gear; 34. a drive slot; 35. a drive ring; 36. connecting grooves; 37. connecting holes; 38. connecting blocks; 39. a tightening rod; 310. a contact lever; 311. a contact block; 312. positioning a groove; 313. a positioning ring; 314. a positioning spring; 315. a ball bearing; 41. a positioning shell; 42. a positioning assembly; 43. and a balancing weight.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1 to 7, the present invention provides an ocean water sampling apparatus, including:

the device comprises a bearing mechanism 1, wherein the bearing mechanism 1 comprises a bearing device 11, a control component 12 and a traction component 13 are installed on the bearing device 11, and the control component 12 is electrically connected with the traction component 13;

the sampling mechanism 2 comprises a sampling barrel 21 in transmission connection with the traction assembly 13 through a connecting rope 16, the sampling barrel 21 comprises a plurality of independently arranged sampling units, and the sampling units are in one-way communication through a communication pipe 22;

the separation mechanism 3 comprises a separation net 31 which is rotatably sleeved outside the sampling cylinder 21, the top end of the separation net 31 is in transmission connection with the sampling cylinder 21 through a driving assembly, and the bottom end of the separation net 31 is detachably connected with the sampling cylinder 21 through a supporting assembly;

positioning mechanism 4, positioning mechanism 4 fixed mounting are in the bottom of sampler barrel 21, and positioning mechanism 4 and control assembly 12 electric connection.

The invention discloses an ocean water quality sampling device, which is mainly used for solving the problem that the existing ocean water quality sampling device cannot realize continuous sampling, improving the sampling efficiency and reducing the sampling labor capacity; the bearing device 11 of the bearing mechanism 1 is used as a base of the device and used for bearing the sampling device to reach a sampling site, the traction component 13 is used for drawing the sampling mechanism 2 to realize traction control on the sampling mechanism 2, the control component 12 is used for controlling the operation of the whole set of equipment and observing a sampling result, so that automatic control is realized and the labor amount is reduced; the sampling cylinder 21 of the sampling mechanism 2 is in transmission connection with the traction assembly 13 through the connecting rope 16, and the lifting of the sampling mechanism 2 is controlled through the connecting rope 16, so that the sampling of seawater at different depths can be conveniently carried out; the sampling cylinder 21 comprises a plurality of independent sampling units, so that the seawater at different depths can be continuously sampled conveniently, the samples are prevented from being mixed, and the sampling precision is improved; the separation net 31 of the separation mechanism 3 is rotatably sleeved outside the sampling cylinder 21, so that sundries and aquatic organisms in seawater can be prevented from blocking the sampling unit, the intercepted sundries are thrown away by the rotating separation net 31, the sundries are prevented from being attached to the separation net 31, the effect of the separation net 31 is improved, and the service life of the separation net 31 is prolonged; positioning mechanism 4 is used for carrying out the counter weight to sampler barrel 21, fixes a position the position and the all ring edge borders of sampler barrel 21 simultaneously, and convenient more accurate location sampling depth.

Further, the carrying device 11 is a ship selected from existing scientific research or the application thereof; the pulling assembly 13, preferably a cable winder, pulls the sampling drum 21 by winding the connecting rope 16; the control component 12 selects an existing device and will not be described in detail here.

According to a further optimized scheme, the sampling unit comprises sample boxes 23, and the sample boxes 23 are fixedly arranged from top to bottom and end to end; the switch assembly is arranged on the outer wall of the sample box 23; the communicating pipe 22 penetrates through the sample box 23 and is communicated with the inner cavity of the sample box 23 through a one-way assembly. The plurality of sample boxes 23 are stacked together to form the sampling cylinder 21, so that continuous sampling at different depths can be realized, multiple times of sampling can be completed in one submerging process, the sampling cylinder 21 does not need to be pulled out of the sea surface and repeated after each sampling, and the sampling efficiency is improved; the switch assembly is used for controlling the on-off relation of the sample box 23 and seawater, when sampling, the switch assembly is opened, the external seawater enters the sample box 23, air in the sample box 23 is pressed to enter the communicating pipe 22 from the one-way assembly until the seawater fills the sampling cylinder 21, sampling is completed, and then the switch assembly is closed to finish sampling at a specific depth.

According to a further optimization scheme, the switch assembly comprises a plurality of water inlet holes 24 penetrating through the outer wall of the sample box 23, the outer wall of the sample box 23 is connected with a switch sleeve 25 in a sliding mode, and the switch sleeve 25 is correspondingly arranged with the water inlet holes 24 and is detachably connected with the water inlet holes; the outer wall of the switch sleeve 25 is connected with a switch screw 26 in a threaded manner, the switch screw 26 is in transmission connection with an output shaft of a switch motor 27, the switch motor 27 is installed at the bottom end of an installation plate 28, and the installation plate 28 is fixedly connected to the outer wall of the sample box 23. When sampling is needed, the switch motor 27 is started, the switch motor 27 drives the switch screw 26 to rotate, and further drives the switch sleeve 25 meshed with the switch screw 26 to rise, the water inlet hole 24 is leaked, and seawater is carried out in the sample box 23 from the water inlet hole 24; after the sample is accomplished, switching motor 27 reverses, and switch cover 25 descends and blocks up inlet opening 24, makes sample box 23 and external contact disconnection, prevents that the sample in the sample box 23 from revealing, also can prevent that the sea water of the different degree of depth from mixing with the sample in the sample box 23, has improved the precision of sample.

Further, a sealing sleeve 215 is arranged between the inner wall of the switch sleeve 25 and the outer wall of the sample box 23, and the sealing sleeve 215 is fixedly connected to the inner wall of the switch sleeve 25 and is in interference fit with the outer wall of the sample box 23, so that the sealing performance of the sample box 23 is improved.

Further, the bottom end of the sample box 23 is communicated with a water outlet pipe 219 for leading out the seawater sample in the sample box 23 after sampling; the outlet pipe 219 is normally closed and is opened only when a sample of seawater is being drawn.

In a further optimized scheme, the one-way assembly comprises a plurality of one-way holes 29 formed in the communicating pipe 22, and one-way plugs 210 are detachably connected in the one-way holes 29; one end of the one-way plug 210 far away from the one-way hole 29 is fixedly connected with an expansion link 211; the communicating pipe 22 is fixedly connected with mounting frames 212 which are correspondingly arranged up and down, a mounting frame 213 is fixedly connected between the two mounting frames 212, and the telescopic rod 211 is fixedly connected on the mounting frame 213; the telescopic rod 211 is externally sleeved with a one-way spring 214, and two ends of the one-way spring 214 are fixedly connected with the mounting frame 213 and the one-way plug 210 respectively. The one-way hole 29 and the one-way plug 210 are both arranged in a circular truncated cone shape, so that the one-way plug 210 can only move towards the direction of the inner cavity of the communicating pipe 22, and further the function of a one-way valve is realized, and air and water in the sample box 23 can enter the communicating pipe 22 and cannot flow reversely; during sampling, external seawater enters the sample box 23, so that the pressure in the sample box 23 is increased, the air in the sample box 23 is pressed to push the one-way plug 210, the sample box 23 is communicated with the communicating pipe 22, and the air is discharged; when the sampling is completed and the water hole 24 is blocked, the one-way spring 214 pushes the one-way plug 210 back to the one-way hole 29 and blocks the one-way hole 29, so that the one-way exhaust function is realized.

In a further optimized scheme, the top end and the bottom end of the sampling cylinder 21 are fixedly connected with an upper top plate 216 and a lower bottom plate 217 respectively, and the positioning mechanism 4 is installed at the bottom end of the lower bottom plate 217; the drive assembly is mounted in an upper top plate 216 and the support assembly is mounted in a lower bottom plate 217. The upper top plate 216 and the lower bottom plate 217 are arranged to provide a position for installing the separation net 31, and the separation net 31 is installed between the upper top plate 216 and the lower bottom plate 217 through the driving assembly and the supporting assembly, so as to isolate the influence of foreign matters and aquatic life on the sampling cylinder 21.

In a further optimized scheme, the driving assembly comprises a driving motor 32 arranged in the upper top plate 216, and the output end of the driving motor 32 is in transmission connection with a driving gear 33; a driving groove 34 is formed at the bottom end of the upper top plate 216, a driving ring 35 is rotationally connected in the driving groove 34, and the driving ring 35 is meshed with the driving gear 33; the top end of the separation net 31 is detachably connected to the drive ring 35. The drive motor 32 rotates the drive ring 35 via the drive gear 33, and further rotates the separation net 31 via the drive ring 35.

In a further optimized scheme, the bottom end of the driving ring 35 is provided with a connecting groove 36 matched with the top end of the separation net 31, the side wall of the connecting groove 36 is provided with a plurality of connecting holes 37, connecting blocks 38 are slidably connected in the connecting holes 37, and the top ends of the connecting blocks 38 extend out of the connecting holes 37 and are detachably connected with the separation net 31; the side wall of the connecting block 38 is hinged with a puller bar 39, the other end of the puller bar 39 extends out of the driving ring 35 and is vertically and fixedly connected with a contact bar 310, and the top end of the contact bar 310 is detachably connected with the side wall of the separation net 31 through a contact block 311. When the separation net 31 is inserted into the connecting groove 36 at the bottom end of the driving ring 35, the connecting blocks 38 are pushed to slide towards the connecting holes 37, and finally the connecting blocks 38 are propped against the separation net 31 to finish fixing; when the connecting block 38 moves, the tightening rod 39 hinged with the connecting block deflects and is abutted against the two side walls of the separation net 31 through the contact rod 310 and the contact block 311, so that the separation net 31 is clamped, the stability between the separation net 31 and the driving ring 35 is improved, and the probability of skidding is reduced.

Further, a connecting spring is fixedly connected between the connecting block 38 and the connecting hole 37 and used for propping against the connecting block 38.

In a further optimized scheme, the supporting component comprises a positioning groove 312 arranged at the top end of the lower bottom plate 217, a positioning ring 313 is connected in the positioning groove 312 in a sliding manner, and the top end of the positioning ring 313 is detachably connected with the bottom end of the separation net 31; a plurality of positioning springs 314 are fixedly connected between the bottom end of the positioning ring 313 and the bottom end of the positioning groove 312. When the separation net 31 is installed, the bottom end of the separation net 31 is abutted against the positioning ring 313, the positioning ring 313 is pressed downwards, and then the top end forgotten to be isolated is inserted into the connecting groove 36 at the bottom end of the driving ring 35, so that the installation of the separation net 31 can be completed.

Furthermore, a plurality of balls 315 are arranged in front of the separation net 31 and the positioning ring 313, and a plurality of balls 315 are arranged between the driving ring 35 and the driving groove 34, so that the friction resistance of the rotation of the separation net 31 is reduced, and the abrasion is reduced.

Further, the separation net 31 is made of a plate-shaped material and is detachably connected to the sampling tube 21.

In a further optimized scheme, the positioning mechanism 4 comprises a positioning shell 41 installed at the bottom end of the lower base plate 217, a positioning component 42 is installed in the positioning shell 41, and the positioning component 42 is electrically connected with the control component 12; the bottom end of the positioning shell 41 is mounted with a weight 43. The positioning assembly 42 comprises a displacement meter and a depth sensor for positioning the position and depth of the sampling tube 21; the displacement meter and the depth sensor are common measuring equipment, and are not described again; the counterweight 43 is used for ensuring that the sampling tube 21 vertically falls without deflection in the midway and reducing the influence of water flow on the tube of the sampling tube 21; the weight of the weight 43 may be selected to be different depending on the sampling depth and the environment.

According to a further optimization scheme, a plurality of air bags 218 are mounted at the top end of the upper top plate 216, air pipes 15 of the air bags 218 are arranged along the connecting ropes 16, and the air pipes 15 are communicated with the air compressor 14 on the bearing device 11; the air tube 15 is flexible. The air bag 218 on the upper top plate 216 is combined with the balancing weight 43 to ensure the posture of the sampling tube 21, and meanwhile, the expansion and contraction of the air bag 218 can also adjust the buoyancy of the sampling tube 21, and adjust the sinking and floating speeds of the sampling tube 21.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above embodiments are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims

1. An ocean water quality sampling device, comprising:

the bearing mechanism (1), the bearing mechanism (1) comprises a bearing device (11), a control component (12) and a traction component (13) are installed on the bearing device (11), and the control component (12) is electrically connected with the traction component (13);

the sampling mechanism (2) comprises a sampling cylinder (21) which is in transmission connection with the traction assembly (13) through a connecting rope (16), the sampling cylinder (21) comprises a plurality of independently arranged sampling units, and the sampling units are in one-way communication through a communicating pipe (22);

the separation mechanism (3) comprises a separation net (31) which is rotatably sleeved outside the sampling cylinder (21), the top end of the separation net (31) is in transmission connection with the sampling cylinder (21) through a driving assembly, and the bottom end of the separation net (31) is detachably connected with the sampling cylinder (21) through a supporting assembly;

positioning mechanism (4), positioning mechanism (4) fixed mounting be in the bottom of sampler barrel (21), positioning mechanism (4) with control assembly (12) electric connection.

2. The marine water quality sampling device of claim 1, wherein: the sampling unit comprises sample boxes (23), and a plurality of sample boxes (23) are fixedly connected and arranged end to end from top to bottom; the outer wall of the sample box (23) is provided with a switch assembly; the communicating pipe (22) penetrates through the sample box (23) and is communicated with the inner cavity of the sample box (23) through a one-way assembly.

3. An ocean water quality sampling apparatus according to claim 2 wherein: the switch assembly comprises a plurality of water inlet holes (24) penetrating through the outer wall of the sample box (23), the outer wall of the sample box (23) is connected with a switch sleeve (25) in a sliding mode, and the switch sleeve (25) is arranged corresponding to the water inlet holes (24) and is detachably connected with the water inlet holes; the outer wall threaded connection of switch cover (25) has switch screw rod (26), switch screw rod (26) are connected with the output shaft transmission of switch motor (27), switch motor (27) are installed in mounting panel (28) bottom, mounting panel (28) rigid coupling is in the outer wall of sample box (23).

4. An ocean water quality sampling apparatus according to claim 2 wherein: the one-way assembly comprises a plurality of one-way holes (29) formed in the communicating pipe (22), and one-way plugs (210) are detachably connected in the one-way holes (29); one end of the one-way plug (210) far away from the one-way hole (29) is fixedly connected with a telescopic rod (211); the communication pipe (22) is fixedly connected with mounting frames (212) which are correspondingly arranged up and down, a mounting frame (213) is fixedly connected between the two mounting frames (212), and the telescopic rod (211) is fixedly connected to the mounting frame (213); telescopic link (211) overcoat is equipped with one-way spring (214), the both ends of one-way spring (214) respectively with mounting bracket (213) with one-way stopper (210) rigid coupling.

5. The marine water quality sampling device of claim 1, wherein: the top end and the bottom end of the sampling cylinder (21) are respectively and fixedly connected with an upper top plate (216) and a lower bottom plate (217), and the positioning mechanism (4) is installed at the bottom end of the lower bottom plate (217); the drive assembly is mounted within the upper top plate (216) and the support assembly is mounted within the lower bottom plate (217).

6. An ocean water quality sampling apparatus according to claim 5 wherein: the driving assembly comprises a driving motor (32) arranged in the upper top plate (216), and the output end of the driving motor (32) is in transmission connection with a driving gear (33); a driving groove (34) is formed in the bottom end of the upper top plate (216), a driving ring (35) is rotationally connected in the driving groove (34), and the driving ring (35) is meshed with the driving gear (33); the top end of the separation net (31) is detachably connected with the driving ring (35).

7. An ocean water quality sampling apparatus according to claim 6 wherein: the bottom end of the driving ring (35) is provided with a connecting groove (36) matched with the top end of the separation net (31), the side wall of the connecting groove (36) is provided with a plurality of connecting holes (37), connecting blocks (38) are connected in the connecting holes (37) in a sliding mode, and the top ends of the connecting blocks (38) extend out of the connecting holes (37) and are detachably connected with the separation net (31); the side wall of the connecting block (38) is hinged with a jacking rod (39), the other end of the jacking rod (39) extends out of the driving ring (35) and is vertically and fixedly connected with a contact rod (310), and the top end of the contact rod (310) is detachably connected with the side wall of the separation net (31) through a contact block (311).

8. An ocean water quality sampling apparatus according to claim 5 wherein: the supporting assembly comprises a positioning groove (312) formed in the top end of the lower bottom plate (217), a positioning ring (313) is connected in the positioning groove (312) in a sliding mode, and the top end of the positioning ring (313) is detachably connected with the bottom end of the separation net (31); and a plurality of positioning springs (314) are fixedly connected between the bottom end of the positioning ring (313) and the bottom end of the positioning groove (312).

9. An ocean water quality sampling apparatus according to claim 5 wherein: the positioning mechanism (4) comprises a positioning shell (41) arranged at the bottom end of the lower bottom plate (217), a positioning component (42) is arranged in the positioning shell (41), and the positioning component (42) is electrically connected with the control component (12); and a balancing weight (43) is installed at the bottom end of the positioning shell (41).

10. An ocean water quality sampling apparatus according to claim 5 wherein: a plurality of air bags (218) are mounted at the top end of the upper top plate (216), air pipes (15) of the air bags (218) are arranged along the connecting ropes (16), and the air pipes (15) are communicated with an air compressor (14) on the bearing device (11); the air pipe (15) has elasticity.