Sampling device for water pollution monitoring and water quality monitoring system and method

Abstract

The invention provides a sampling device for water pollution monitoring, a water quality monitoring system and a water quality monitoring method, which are used for solving the problems that the sampling device in the prior art cannot adapt to sampling scenes with different water depths and only samples with specific depths can be taken at a single time, and the sampling device is of an ellipsoidal structure and comprises a counterweight module and a sampling module, the sampling module comprises a plurality of sampling mechanisms, the counterweight module comprises a driving mechanism, the driving mechanism is used for opening or closing sampling ports or sample discharging ports of the sampling mechanisms, and the driving mechanism can only open one sampling port at a time; the sampling device is arranged to be of the ellipsoidal structure, the weight of the sampling device is changed through the balance weight module, so that the sampling mechanism sinks or floats upwards, the sampling mechanism can not only take samples of surface water, but also take samples at different water depths at the same time, and the situation of mutual pollution can be avoided.

Description

Technical Field

[0001] The invention belongs to the field of water quality monitoring, and in particular relates to a sampling device for water pollution monitoring, a water quality monitoring system and a method. Background Art

[0002] With the development of science and technology, people's living standards are getting higher and higher, but the improvement of material life is also accompanied by the worsening of environmental pollution, especially water pollution. Therefore, water quality monitoring is one of the important tasks of environmental monitoring.

[0003] When monitoring personnel take samples from the corresponding water source, they usually only take water from the surface of the water source for monitoring. However, the distribution of pollutants in the water layer will be affected by factors such as water flow rate, depth, and mud at the bottom of the water, resulting in different degrees of pollution in water at different depths of the water source. If only surface water is taken, some types of pollutants cannot be monitored.

[0004] In the prior art, in order to obtain water at different depths of a water source, there is a sampling rod hoisted by a drone, and the sampling rod is divided into an upper sampling rod and a lower sampling rod. The upper sampling rod is inserted in the lower sampling rod, and a water inlet channel is provided in the upper sampling rod, and a sampling cavity is provided in the lower sampling rod. One end of the upper sampling rod is connected to the drone, and the first water inlet of the water inlet channel is provided at the end close to the drone, and the water outlet is provided at the end close to the lower water sampling rod, and the middle part of the upper sampling rod is provided as a hose. The lower sampling rod is provided with a second water inlet at the end close to the upper sampling rod. A switch structure is also provided at the connection between the upper sampling rod and the lower sampling rod, and the switch structure automatically opens or closes the first water outlet and the second water inlet according to the amount of water entering the water inlet channel to complete the sampling of water samples. When in use, the distance between the first water inlet and the second water inlet is adjusted, that is, the elastic deformation of the hose is adjusted to sample water at different depths.

[0005] Although this method can sample water at a specific depth, the sampling depth is limited by the length of the upper sampling rod. If the length of the upper sampling rod is too long, the drone cannot drive it to move. In addition, due to the influence of water tension, the sampling rod may not be able to descend to the specified water depth. In addition, the sampling rod can only take water samples at a specific depth. When sampling water at different depths, the sampling operation needs to be repeated, which is cumbersome and time-consuming. In addition, water is usually contaminated by gasoline, diesel, etc., and these pollutants are usually suspended on the water surface. Since the sampling rod is controlled by a drone, although the drone can drive the water sampling rod to hover on the water surface, the airflow generated by the rotation of the drone's wings during use causes the oil to penetrate the sampling rod, and the sampling rod cannot pick up such pollutants. Summary of the invention

[0006] In view of the shortcomings of the prior art described above, an object of the present invention is to provide a sampling device, a water quality monitoring system and a method for water pollution monitoring, which are used to solve the problems that the sampling device in the prior art cannot adapt to sampling scenarios of different water depths and can only take samples of a specific depth at a time.

[0007] To achieve the above-mentioned purpose and other related purposes, the present invention provides a sampling device for water pollution monitoring, the sampling device is an ellipsoidal structure, which includes: a counterweight module and a sampling module; the sampling module includes multiple sampling mechanisms, and the multiple sampling mechanisms are detachably connected; the sampling mechanism includes a sampling cavity, a sampling port, a sample discharge port and two groups of sealing components; the sampling port and the sample discharge port are connected to the sampling cavity, and the sealing components are arranged in the sampling cavity, one group of sealing components is used to seal the sampling port, and the other group of sealing components is used to seal the sample discharge port; the counterweight module drives the sampling device to descend or rise to different depths by changing its own weight; the counterweight module includes a driving mechanism, and the driving mechanism is used to drive the sealing component to move to open or seal the sampling port and the sample discharge port; the driving mechanism can only drive one group of sealing components that seal the sampling port to move at a time; the counterweight module is detachably connected to the sampling module; the counterweight module and the multiple sampling mechanisms are arranged in sequence along the long axis of the sampling device.

[0008] Optionally, the counterweight module includes a first counterweight mechanism and a second counterweight mechanism, the first counterweight mechanism and the second counterweight mechanism are sequentially arranged along the long axis of the sampling device; the second counterweight mechanism and the sampling mechanism are detachably connected; the second counterweight mechanism includes a receiving chamber, a water inlet and a water outlet communicated with the receiving chamber, a water pump is arranged in the receiving chamber, and the water pump is used to pump water into the receiving chamber through the water inlet to drive the sampling device to sink or to drain water out of the receiving chamber through the water outlet to drive the sampling device to float; the driving mechanism is arranged in the first counterweight mechanism, and the driving mechanism passes through the second counterweight mechanism and is connected to the sealing assembly; and / or, a sealing assembly for sealing the sampling port disposed on each sampling mechanism is staggered along the long axis of the sampling device; And / or, the sealing assembly for sealing the sampling port provided on each of the sampling mechanisms is staggered along the circumference or the minor axis of the sampling device.

[0009] Optionally, the driving mechanism includes a motor, a transmission member and multiple cams; the multiple cams are respectively connected to sealing components arranged on the sampling mechanism; the motor drives the cams to rotate by driving the transmission member; the central axis of the transmission member coincides with the major axis of the ellipsoidal structure; the cam is provided with multiple notches along its circumference, and when the notches are connected to the sealing component, the sealing component opens the sampling port or the discharge port.

[0010] Optionally, the sampling mechanism includes a first shell and a second shell; the first shell and the second shell enclose a sampling cavity; the sampling port and the sample discharge port are arranged on the first shell; the second shell is a hollow cylindrical structure, the cam is arranged in the second shell, and a first through hole is arranged on the second shell; one end of the sealing assembly is connected to the sampling port or the sample discharge port, and the other end is connected to the cam through the first through hole.

[0011] Optionally, the sealing assembly includes a first connecting member, a sealing member for connecting to a sampling port or a discharge port, an abutment member for connecting to a cam, and a first elastic member; the sealing member and the abutment member are respectively arranged at one end of the first connecting member; a first abutment portion is arranged on the inner side wall of the end of the first through hole away from the sampling cavity, and a second abutment portion is arranged at an end of the first connecting member close to the abutment portion; the first elastic member is sleeved on the first connecting member, one end of which is connected to the first abutment portion, and the other end is connected to the second abutment portion.

[0012] Optionally, a support member for supporting the first connecting member is further provided at the bottom of the sampling cavity, and the support member is connected to an end of the first connecting member close to the sampling port or the sample discharge port; And / or, the first housing includes a first sub-housing and a second sub-housing; the first sub-housing is a groove-shaped structure, and the second sub-housing is arranged on the top of the first sub-housing and is detachably connected to the first sub-housing; And / or, the sampling device further comprises an air distribution module, the air distribution module is connected to the weight distribution module through the sampling module, a cavity is arranged in the air distribution module; a second connecting member for connecting to the driving mechanism is arranged at the bottom of the air distribution module; And / or, a first sensing component for sensing water volume is also provided in the sampling mechanism and the counterweight module; And / or, the sampling device further comprises a second sensing component for sensing the depth of the sampling device.

[0013] The present invention also provides a water quality monitoring system, including the above-mentioned sampling device for water pollution monitoring, and also including a water quality monitor, a fixing module, a test tube loading module, a sampling module, a transfer module, a grabbing module, and a base; the water quality monitor, the fixing module, the test tube loading module, the sampling module, the transfer module, and the grabbing module are arranged on the base; the test tube loading module is connected to the transfer module, and is used to provide test tubes to the transfer module; the fixing module is used to fix the sampling device; the sampling module is connected to the fixing module and the transfer module; the fixing module is also used to drive the sampling module to connect with the sampling port of the sampling device; the sampling module is used to discharge the sample in the sampling device into the test tube; the grabbing module is used to place the test tube in the transfer module into the monitoring position of the water quality monitor.

[0014] Optionally, the fixing module includes a first fixing component, the first fixing component includes a first fixing seat and a shock-absorbing component, one end of the shock-absorbing component is connected to the first fixing seat, and the other end is connected to the base; the sample arrangement module is rotatably connected to the first fixing seat; the shock-absorbing component includes a first connecting column, a second connecting column and a second elastic member; the first connecting column is arranged on the base, and is provided with a through hole for accommodating the second connecting column; one end of the second connecting column is connected to the first fixing seat, and the other end is passed through the through hole; the second elastic member is sleeved on the second connecting column, one end of which is connected to the first fixing seat, and the other end is connected to the first connecting column.

[0015] Optionally, the fixing module also includes a second fixing component, the second fixing component includes a mounting plate and a second fixing seat; the mounting plate is connected to the base through a support column, the second fixing seat is rotatably connected to the mounting plate, and the second fixing seat is provided with a plurality of fixing parts for abutting against the sampling device; and / or, the sample discharge module includes a drainage groove, a rotating part and a sample discharge tube; the drainage groove is connected to the transfer module, the sample discharge tube is arranged on the rotating part, one end of the sample discharge tube is used to be connected to the drainage groove, and the other end is used to be connected to the sample discharge port; the rotating part is rotatably arranged on the base and is rotatably connected to the first fixing seat.

[0016] The present invention also provides a method for using a sampling device for water pollution monitoring, which is used for the above-mentioned water sampling device for water pollution monitoring, and includes: obtaining the depth of the water source to be sampled where the sampling device is located, and when the depth meets the first preset condition, opening the sampling port of the corresponding sampling mechanism and using a water pump to pump out the water in the second counterweight module; obtaining the water volume in the corresponding sampling mechanism, and when the water volume meets the second preset condition, closing the sampling port of the corresponding sampling mechanism, and using a water pump to pump water into the second counterweight module; obtaining the drainage instruction of the sampling device, and after obtaining the drainage instruction, opening the sampling ports of all the sampling mechanisms to complete the sampling.

[0017] As described above, a sampling device, a water quality monitoring system and a method for water pollution monitoring of the present invention have at least the following beneficial effects: by setting the sampling device as an ellipsoidal structure, the counterweight module and the sampling module are arranged in sequence along the long axis of the ellipsoidal structure, so that the sampling device is set as a tumbler structure, the sampling device can be maintained in a vertical state along the long axis, which is convenient for sampling surface water; in addition, the weight of the counterweight module itself can also be changed, so that the sampling device can float or sink in the water source to be sampled, and the counterweight module is used in conjunction with multiple sampling mechanisms of the sampling module so that samples from different water layers can be taken at one time; and the driving mechanism arranged on the counterweight module can only open a group of sealing components of the sealed sampling port at a time to ensure that each sampling mechanism takes different samples, thereby preventing samples from contaminating each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1Shown is a schematic structural diagram of a sampling device for water pollution monitoring according to the present invention.

[0019] Figure 2 Shown is a cross-sectional view of a sampling device for water pollution monitoring according to the present invention.

[0020] Figure 3 Display as Figure 2 A magnified schematic diagram of center A.

[0021] Figure 4 The diagram shows the structure of the sampling mechanism with the second sub-housing omitted.

[0022] Figure 5 Shown is a schematic diagram of the assembly of the transmission parts and cam of the driving mechanism.

[0023] Figure 6 Shown is a structural schematic diagram of a water quality monitoring system.

[0024] Figure 7 Display as Figure 6 A magnified schematic diagram of point B in the middle.

[0025] Figure 8 Shown is a schematic structural diagram of a water quality monitoring system from another angle.

[0026] Fig. 9 A flow chart showing a method of using a sampling device for water pollution monitoring.

[0027] Component number description 100. Sampling device, 1. Counterweight module, 11. First counterweight mechanism, 12. Second counterweight mechanism, 121. Accommodating chamber, 122. Water inlet, 123. Water outlet, 124. Water pump, 13. Driving mechanism, 131. Motor, 132. Transmission member, 133. Cam, 1331. Notch, 2. Sampling module, 21. Sampling mechanism, 211. Sampling chamber, 212. Sampling port, 213. Sample discharge port, 214. Sealing assembly, 21 41. first connecting member, 2142. sealing member, 2143. abutting member, 2145. first elastic member, 2146. second abutting portion, 215. first housing, 2151. first sub-housing, 2152. second sub-housing, 216. second housing, 2161. first through hole, 21612. first abutting portion, 217. counterweight, 218. supporting member, 3. counterweight module, 31. cavity, 32. second connecting member, 33. handle; 200. Water quality monitoring instrument; 300, fixing module, 4, first fixing assembly, 41, first fixing seat, 42, shock absorbing assembly, 421, first connecting column, 422, second connecting column, 423, second elastic member, 5, second fixing assembly, 51, mounting plate, 52, second fixing seat, 521, fixing member, 53, supporting column; 400, test tube loading module; 500, sample arrangement module, 6, drainage trough, 7, rotating part, 8, sample arrangement tube; 600, transfer module; 700, crawling module; 800. Base. DETAILED DESCRIPTION

[0028] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0029] Please refer to all the following drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0030] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0031] See also Figure 1-2The present invention provides a sampling device 100 for water quality monitoring. The sampling device 100 is an ellipsoidal structure, which includes a counterweight module 1 and a sampling module 2; the sampling module 2 includes a plurality of sampling mechanisms 21, and the plurality of sampling mechanisms 21 are detachably connected; the sampling mechanism 21 includes a sampling cavity 211, a sampling port 212, a sample row port 213 and two sets of sealing components 214; the sampling port 212 and the sample row port 213 are connected to the sampling cavity 211, and the sealing component 214 is arranged in the sampling cavity 211, wherein one set of sealing components 214 is used to seal the sampling port 212, and the other set of sealing components 214 is used to seal the sampling port 212. 4 is used to seal the sampling port 213; the weight module 1 drives the sampling device 100 to descend or ascend to different depths by changing its own weight; the weight module 1 includes a driving mechanism 13, and the driving mechanism 13 is used to drive the sealing component 214 to move to open or seal the sampling port 212 and the sampling port 213; the driving mechanism 13 can only drive a group of sealing components 214 of the sealing sampling port 212 to move at a time; the weight module 1 is detachably connected to the sampling module 2; the weight module 1 and the plurality of sampling mechanisms 21 are sequentially arranged along the long axis of the sampling device 100, that is, sequentially arranged along the long axis of the ellipsoid.

[0032] In this embodiment, the sampling device 100 is set as an ellipsoidal structure, and the sampling mechanism 21 of the counterweight module 1 and the sampling module 2 are sequentially arranged along the long axis of the ellipsoidal structure, that is, the sampling device 100 of the present invention is a tumbler structure. When the sampling mechanism 21 has not completed sampling, its interior is a cavity 31, and the gravity of the counterweight module 1 can make the sampling device 100 suspended on the water surface in a vertical state along its long axis. It can be understood that the weight of the counterweight module 1 is less than the buoyancy of the sampling module 2, so that when the sampling device 100 is placed in the water, the sampling device 100 can remain in a vertical state along the long axis; in addition, the ellipsoidal structure has a good streamline shape, and this design helps to reduce water resistance and facilitates the transposition of sampling when sinking or floating. When sampling surface water, since the sampling device 100 remains in a vertical state, the position at which the sampling port 212 can sample surface water is relatively fixed, so that the weight change on the counterweight module 1 is also relatively fixed. After the sampling device 100 is placed on the water surface, there is no influence from wings, etc., which makes it easy for the water sampling device to sample pollutants such as oil on the water surface.

[0033] The driving mechanism 13 disposed on the counterweight module 1 can only drive the sealing assembly 214 of a group of sealed sampling ports 212 to move at a time, which means that the driving mechanism 13 can only open the sampling port 212 disposed on one sampling mechanism 21 at a time. For example, when the sampling port 212 of one sampling mechanism 21 is opened, the sampling ports 212 of the other sampling mechanisms 21 are in a closed state, so as to avoid different sampling mechanisms 21 taking samples of the same depth and affecting subsequent results. When arranging samples, the driving mechanism 13 can be capable of simultaneously opening the arranging ports 213 of multiple sampling mechanisms 21 to achieve simultaneous arranging of samples, or the driving mechanism 13 can only open the arranging ports 213 of one sampling mechanism 21 at a time to discharge samples of a certain sampling mechanism 21 in a targeted manner. It can be understood that in the present embodiment, a group of sealing assemblies 214 can be a single sealing assembly 214 or a plurality of sealing assemblies 214, and the invention is not limited to this. The counterweight module 1 can drive the sampling device 100 to descend or ascend to different depths by changing its own weight. For example, the counterweight module 1 can increase its own weight by absorbing water or reduce its own weight by discharging water. When the weight of the counterweight module 1 is increased by absorbing water, the gravity of the counterweight module 1 is greater than the buoyancy, thereby driving the sampling device 100 to dive into the water; when the counterweight module 1 is drained, the weight of the counterweight module 1 is reduced, and the gravity is equal to the buoyancy, thereby driving the sampling device 100 to hover on a certain water layer. When the gravity is less than the buoyancy, the sampling device 100 can be driven to float to the surface of the water.

[0034] Since water sample residue may exist in the sampling cavity 211 after the sampling mechanism 21 completes a sampling, the sampling mechanisms 21 are detachably connected in this embodiment to facilitate the user to remove the sampling mechanism 21 and to clear the sampling cavity 211 of the sampling mechanism 21 .

[0035] The counterweight module 1 includes a first counterweight mechanism 11 and a second counterweight mechanism 12, which are arranged in sequence along the long axis of the sampling device 100; the second counterweight mechanism 12 and the sampling mechanism 21 are detachably connected; the second counterweight mechanism 12 includes a accommodating chamber 121, a water inlet 122 and a water outlet 123 connected to the accommodating chamber 121, and a water pump 124 is arranged in the accommodating chamber 121. The water pump 124 is used to pump water into the accommodating chamber 121 through the water inlet 122 to drive the sampling device 100 to sink or to discharge water to the outside of the accommodating chamber 121 through the water outlet 123 to drive the sampling device 100 to float; the driving mechanism 13 is arranged in the first counterweight mechanism 11, and the driving mechanism 13 passes through the accommodating chamber 121 and is connected to the sealing assembly 214.

[0036] The water pump 124 can be provided with two, namely a water pump and a drainage pump. The water pump is provided with a water inlet pipe and a water outlet pipe. One end of the water inlet pipe is connected to the water pump, and the other end is connected to the water inlet 122. One end of the water outlet pipe is connected to the water pump, and the other end is connected to the accommodating chamber 121. The drainage pump is provided with a water pump pipe and a drainage pipe. One end of the water pump pipe is connected to the accommodating chamber 121 and is arranged close to the bottom of the accommodating chamber 121. One end of the drainage pipe is connected to the water outlet 123, and the other end is connected to the drainage pump. In this embodiment, a groove is provided at the bottom of the accommodating chamber 121, and the bottom surface of the accommodating chamber 121 is inclined toward the groove. One end of the water pump pipe away from the water pump is arranged in the groove, so that the water pump can pump out all the water in the accommodating chamber 121. The first counterweight structure and the second counterweight structure are detachably connected to each other, so as to facilitate the maintenance of the driving mechanism 13 arranged on the first counterweight mechanism 11. The second counterweight structure includes a first shell, a second shell, and a third shell; the first shell, the second shell, and the third shell enclose a receiving chamber 121. The second shell is arranged in the first shell, and the second shell is a hollow cylindrical structure, wherein the axis thereof coincides with the center line of the sampling device 100. It is understandable that the second shell can be integrally formed with the first shell, or can be two separately manufactured parts connected together by threaded connection or welding. The connection between the third shell and the first shell and the second shell can be detachably connected, for example, by threaded connection. Optionally, a sealing structure, such as a sealing ring, is also provided at the connection to ensure that the water contained in the receiving chamber 121 will not leak from the connection between the three. In addition, the connection between the third shell and the first shell and the second shell can be detachably connected, and the third shell can be removed when the sampling device 100 is not in use, so that the receiving chamber 121 can be cleaned or components such as the water pump 124 disposed in the receiving chamber 121 can be maintained.

[0037] A first mounting structure is provided at one end of the first counterweight mechanism 11 facing the second counterweight mechanism 12. The first mounting structure is a cylindrical groove with an opening facing the second counterweight mechanism 12, and the center line of the groove coincides with the long axis of the sampling device 100. The driving mechanism 13 is arranged in the first mounting structure, and the center of gravity of the driving mechanism 13 is arranged on the long axis of the elliptical structure, that is, the center of gravity of the driving mechanism 13 and the center of gravity of the first counterweight mechanism 11 are on the same straight line. This arrangement ensures that after the sampling device 100 is placed on the water surface, it can be vertically arranged along the long axis direction of the elliptical structure to form a tumbler structure. The driving mechanism 13 passes through the second counterweight mechanism 12 and is connected to the sealing assembly 214. Specifically, the driving mechanism 13 passes through the second shell of the second counterweight mechanism 12 and is connected to the sealing assembly 214. This arrangement is convenient for connecting the driving mechanism 13 and the sealing assembly 214 on the one hand, and on the other hand, since there is no connection between the driving mechanism 13 and the second shell, it is convenient to remove the second counterweight mechanism 12 from the first counterweight mechanism 11.

[0038] See also Figure 2 , 4 5. The driving mechanism 13 includes a motor 131, a transmission member 132 and a plurality of cams 133; the plurality of cams 133 are respectively connected to the sealing assembly 214 provided on the sampling mechanism 21; the motor 131 drives the transmission member 132 to rotate, thereby driving the cam 133 to rotate; the central axis of the transmission member 132 coincides with the long axis of the sampling device 100; the cam 133 is provided with a plurality of notches 1331 along its circumference, and when the notches 1331 are connected to the sealing assembly 214, the sealing assembly 214 opens the sampling port 212 or the sample discharge port 213. The motor 131 is provided on the first mounting structure in the first counterweight mechanism 11, the transmission member 132 is connected to the motor 131, the plurality of cams 133 are respectively provided on the transmission member 132, and are arranged at intervals, and each cam 133 is connected to the sealing assembly 214 provided on the sampling mechanism 21. The transmission member 132 may be a transmission shaft, and the cam 133 is fixedly provided on the transmission shaft, that is, the cam 133 can rotate together with the transmission shaft. The number of cams 133 can be set corresponding to the sampling mechanism 21. For example, when there are two sampling mechanisms 21, there are two cams 133. In this case, the cams 133 are used to drive the sealing components 214 of the sampling port 212 and the sample discharging port 213 to move. The number of cams 133 can also be set corresponding to the number of sealing components 214 of the sampling mechanism 21, that is, there is a cam 133 corresponding to each sealing component 214. In this embodiment, the number of cams 133 is set corresponding to the sampling mechanism 21. Two notches 1331 are set on the cam 133, one of which is set corresponding to the sealing component 214 of the sampling port 212, and the other sampling port 212 is set corresponding to the sealing component 214 of the sample discharging port 213. The angle formed by the two notches 1331 and the center of the cam 133 is less than 180° and greater than 0°. This setting ensures that the cam 133 cannot open the sampling port 212 and the sample discharging port 213 at the same time.

[0039] Furthermore, in this embodiment, three sampling mechanisms 21 are provided, and three sealing assemblies 214 are also provided. The first sampling mechanism is detachably connected to the counterweight module 1, and the first sampling mechanism is detachably connected to the third sampling mechanism through the second sampling mechanism. The first sampling mechanism can be used to sample surface water, the second sampling mechanism can sample middle layer water, and the third sampling mechanism can sample formation water. Three corresponding cams 133 are also provided, and each cam 133 is provided corresponding to one of the sampling mechanisms 21, and is used to open the sample discharge port 213 and the sampling port 212 of the corresponding sampling mechanism 21. The sealing assembly 214 for sealing the sampling port 212 disposed on each sampling mechanism 21 is staggered along the long axis of the sampling mechanism 21, and / or the sealing assembly 214 for sealing the sampling port disposed on each of the sampling mechanisms 21 is staggered along the circumference or short axis of the sampling device 100. Correspondingly, when the cam 133 is disposed on the transmission member 132, the notch 1331 for opening the sealing assembly 214 is also staggered, ensuring that when the driving mechanism 13 drives the cam 133 to rotate, the cam 133 can only drive the sealing assembly 214 of one sampling mechanism 21 at a time to open the sampling port 212. It can be understood that the sealing assembly for sealing the sampling port disposed on each of the sampling mechanisms is staggered along the circumference or short axis of the sampling device, which means that after the sealing assembly of each sampling mechanism is projected onto a plane perpendicular to the long axis of the sampling device, the sealing assemblies for sealing the sampling port do not overlap with each other.

[0040] In this embodiment, the angle between the two notches of the cam 133 used to drive the first sampling mechanism to move is 120°, the angle between the two notches of the cam corresponding to the second sampling mechanism is 80°, and the angle between the two notches of the cam corresponding to the third sampling mechanism is 40°. At this time, there are 6 notches 1331 on the three cams 133, three of which are arranged at 40° intervals along the radial direction of the transmission member 132, ensuring that when the transmission member 132 is transmitting, the cam 133 can only open the sampling port 212 of one of the sampling mechanisms 21 at a time, and the other three notches 1331 overlap along the radial direction of the transmission member 132, so that the cam 133 can simultaneously open the sample discharge ports 213 of the three sampling mechanisms 21 to achieve simultaneous sample discharge. In addition, since the sealing components in this embodiment are all arranged on one side of the sampling mechanism, the center of gravity of the sampling device will deviate from the long axis of the ellipsoidal structure. Therefore, a counterweight 214 for counterweighting is also provided in the sampling cavity 211 of the sampling mechanism to ensure that the center of gravity of the sampling mechanism is located on the long axis. The counterweight can be a metal block or other structure that can balance the gravity of the sealing component 214, and the present invention does not impose any limitation on this.

[0041] See also Figure 2The sampling mechanism 21 includes a first shell 215 and a second shell 216; the first shell 215 and the second shell 216 enclose a sampling cavity 211; the sampling port 212 and the sample discharge port 213 are arranged on the first shell 215; the second shell 216 is a hollow columnar structure, the cam 133 is arranged in the second shell 216, and a first through hole 2161 is arranged on the second shell 216; one end of the sealing component 214 is connected to the sampling port 212 or the sample discharge port 213, and the other end is connected to the cam 133 through the first through hole 2161. The central axis of the second shell 216 corresponds to the long axis of the sampling device 100, and the interior thereof is hollow for accommodating the cam 133 of the driving mechanism 13, and the outer side surface of the second shell 216 and the inner side surface of the first shell 215 enclose the sampling cavity 211. The first housing 215 includes a first sub-housing 2151 and a second sub-housing 2152. The first sub-housing 2151 is a groove-shaped structure, and the second sub-housing 2152 is detachably arranged on the top of the first sub-housing 2151. Specifically, an internal thread is arranged on the inner side surface of the first sub-housing 2151, and an external thread is arranged on the outer side surface of the second sub-housing 2152, and the two are connected by threads; the cross section of the second sub-housing 2152 along the long axis direction of the elliptical structure is an elliptical structure adapted to the first sub-housing 2151, and a second through hole for the transmission member 132 to pass through is arranged at the center; the second sub-housing 2152 is also provided with a sealing structure at the connection with the second housing 216 to ensure that the water in the sampling chamber 211 will not leak after the sampling device 100 is assembled. The sampling port 212 is arranged at a position of the first sub-housing 2151 away from the bottom of the sampling chamber 211, so that when sampling, water can enter the accommodating chamber 121 through the pressure difference and gravity; the sample discharge port 213 is arranged on the first sub-housing 2151 and is connected to the bottom of the sampling chamber 211, so that when sampling is realized, water can be discharged to the outside of the sampling chamber 211 through the action of gravity.

[0042] See also Figure 2 , 34. The sealing assembly 214 includes a first connecting member 2141, a sealing member 2142 for connecting with the sampling port 212 or the sample discharge port 213, an abutting member 2143 for connecting with the cam 133, and a first elastic member 2145; the sealing member 2142 and the abutting member 2143 are respectively arranged at one end of the first connecting member 2141; a first abutting portion 21612 is arranged on the inner side wall of the end of the first through hole 2161 away from the sampling cavity 211, and a second abutting portion 2146 is arranged at one end of the first connecting member 2141 close to the abutting member 2143. The first elastic member 2145 is sleeved on the first connecting member 2141, one end of which is connected to the first abutting portion 21612, and the other end is connected to the second abutting portion 2146. The second abutting portion 2146 is arranged on one end of the first connecting member 2141 close to the abutting member 2143 and is located outside the sampling cavity 211. When the abutment 2143 of the first connecting member 2141 abuts against the side of the cam 133 where the notch 1331 is not provided, the sealing member 2142 provided on the first connecting member 2141 abuts against the sampling port 212 or the sample discharging port 213 of the sampling mechanism 21 to achieve sealing, and the first elastic member 2145 is in a compressed state at this time; when the cam 133 rotates and drives the notch 1331 on the cam 133 to gradually abut against the abutment 2143, due to the elastic force of the notch 1331 provided on the cam 133 and the first elastic member 2145, the first connecting member 2141 is driven to move along the first through hole 2161, that is, the sealing member 2142 is driven away from the sampling port 212 or the sample discharging port 213, until the notch 1331 and the abutment 2143 are completely abutted to open the sampling port 212 or the sample discharging port 213, thereby achieving sampling or sample discharging. In an optional embodiment, a linear bearing and a sealing mechanism are provided at the connection between the first connecting member 2141 and the first through hole 2161, so that the first connecting member 2141 can move along the first through hole 2161 and ensure the sealing of the sampling chamber 211. A sealing structure is provided at the connection between the sealing member 2142 and the sampling port 212 or the sample discharge port 213 to ensure that the sealing member 2142 can seal the sampling port 212 or the sample discharge port 213.

[0043] A support member 218 for supporting the first connecting member 2141 is also provided at the bottom of the sampling chamber 211. The support member 218 is connected to one end of the first connecting member 2141 close to the sampling port 212 or the sample discharge port 213; the support member 218 and the first through hole 2161 form a two-point support, which on the one hand ensures that the first connecting member 2141 can move along the first through hole 2161, and on the other hand ensures that the movement path of the first connecting member 2141 will not change during movement, thereby ensuring the sealing effect.

[0044] See also Figure 1 , 2The sampling device 100 also includes a weight distribution module 3, which is connected to the weight distribution module 1 through the sampling module 2, and a cavity 31 is provided in the weight distribution module 3; a second connecting member 32 for connecting to the driving mechanism 13 is provided at the bottom of the weight distribution module 3. The cavity 31 is provided in the weight distribution module 3 to reduce the weight of the weight distribution module 3 and ensure that the sampling device 100 forms a tumbler structure. A second connecting member 32 for connecting to the driving mechanism 13 is provided at the bottom of the weight distribution module 3, specifically a second connecting member 32 connected to the transmission member 132 of the driving mechanism 13. The second connecting member 32 and the motor 131 realize two-point positioning of the transmission member 132 to ensure the coaxiality of the rotation of the transmission member 132.

[0045] The sampling mechanism 21 and the counterweight module 1 are also provided with a first sensing component for sensing the amount of water; the sampling device 100 also includes a second sensing component for sensing the depth of the sampling device 100. The first sensing component of the sampling mechanism 21 is arranged in the sampling cavity 211; the first sensing component in the counterweight module 1 can be arranged in the accommodating cavity 121 of the second counterweight module 1. The first sensing component can be a sensor, such as a weight sensor, which prompts when the water in the sampling cavity 211 or the accommodating cavity 121 in the second counterweight module 1 reaches a certain weight, or prompts the amount of water in real time. The second sensing component can be arranged on the counterweight module 1, and is used to sense the water depth through water pressure, the descending distance of the counterweight module 1, etc. The second sensing component can be a pressure sensor, and of course it can also be other structures, and the present invention is not limited to this.

[0046] The sampling device 100 also includes a sampling depth setting module, which can be arranged on the counterweight module 1. Specifically, the depth setting module includes a display screen, and the user can set the depth of the water sample taken by each sampling mechanism 21 through the display screen.

[0047] See also Figure 6 , 78. The present invention also provides a water quality monitoring system, including the above-mentioned sampling device 100 for water pollution monitoring, and also includes a water quality monitor 200, a fixing module 300, a test tube loading module 400, a sample arrangement module 500, a transfer module 600, a grabbing module 700, and a base 800; the water quality monitor 200, the fixing module 300, the test tube loading module 400, the sample arrangement module 500, the transfer module 600, and the grabbing module 700 are arranged on the base 800; the test tube loading module 400 and the transfer module 600 are arranged on the base 800; The transfer module 600 is connected to provide a test tube to the transfer module 600; the fixing module 300 is used to fix the sampling device 100; the sample arrangement module 500 is connected to the fixing module 300 and the transfer module 600; the fixing module 300 is also used to drive the sampling module 2 to connect with the sample arrangement port 213 of the sampling device 100; the sample arrangement module 500 is used to discharge the sample in the sampling device 100 into the test tube; the grabbing module 700 is used to place the test tube in the transfer module 600 into the monitoring position of the water quality monitor.

[0048] The transfer module 600 includes a slide and a blocking device. A plurality of sampling positions and transfer positions are arranged on the slide. The number of sampling positions corresponds to the number of sampling mechanisms 21. For example, when the number of sampling mechanisms 21 is 3, the number of sampling positions is 3. The number of transfer positions corresponds to the number of water quality monitors. For example, when the number of water quality monitors is 2, the number of transfer positions is two. The blocking device is used to block the test tubes on the slide at the sampling position. The test tubes can be transferred from the sampling position to the transfer position by gravity or a transmission mechanism such as a belt transmission mechanism arranged on the slide. The test tube loading module 400 contains a plurality of test tubes, which are transferred one by one to the slide of the transfer module 600 through a test tube sorting device.

[0049] The fixing module 300 includes a first fixing assembly 4 and a second fixing assembly. The first fixing assembly 4 includes a first fixing seat 41 and a shock absorbing assembly 42 for fixing the sampling device 100. The first fixing seat 41 is provided with a groove adapted to the weighing module. One end of the shock absorbing assembly 42 is connected to the first fixing seat 41, and the other end is connected to the base 800. The sample arrangement module 500 is rotatably connected to the first fixing seat 41. The shock absorbing assembly 42 includes a first connecting column 421, a second connecting column 422 and a second elastic member 423; the first connecting column 421 is arranged on the base 800, which is provided with a through hole for accommodating the second connecting column 422; one end of the second connecting column 422 is connected to the first fixing seat 41, and the other end is inserted into the through hole; the second elastic member 423 is sleeved on the second connecting column 422, one end of which is connected to the first fixing seat 41, and the other end is connected to the first connecting column 421. The second elastic member 423 can be a spring or other elastic member, and the present invention does not limit this. The shock absorbing assembly 42 can be set to multiple, the first fixing seat 41 is a rectangular structure, and the shock absorbing assemblies 42 are respectively located at the angles formed by the two sides of the rectangular structure.

[0050] The second fixing assembly includes a mounting plate 51 and a second fixing seat 52 ; the mounting plate 51 is connected to the base 800 via a support column 53 , the second fixing seat 52 is rotatably connected to the mounting plate 51 , and a plurality of fixing members 521 for abutting against the sampling device 100 are provided on the second fixing seat 52 .

[0051] The sample discharging module 500 includes a drainage groove 6, a rotating member 7 and a sample discharging tube 8; the drainage groove 6 is connected to the transfer module 600, and the sample discharging tube is arranged on the rotating member 7, one end of which is used to be connected to the drainage groove 6, and the other end is used to be connected to the sample discharging port 213; the rotating member 7 is rotatably arranged on the base 800, and is rotatably connected to the first fixed seat 41. The connection end of the sample discharging tube 8 and the sample discharging port 213 can also be provided with a sealing structure to ensure that after the sample discharging tube 8 and the sample discharging port 213 are connected, the two are sealed to ensure that water does not leak.

[0052] The grabbing module 700 is a manipulator used to grab the test tube located at the transfer position and move it to the monitoring position on the water quality analyzer.

[0053] Its working principle is: when the sampling device 100 is placed on the fixing module 300, the first fixing component 4 fixes the bottom of the sampling device 100, that is, the weighing module, and the second fixing component fixes the top of the sampling device 100, that is, the air-matching module 3. Specifically, the weighing module of the sampling device 100 is located in a groove set in the first fixing seat 41, and the fixing piece 521 on the second fixing seat 52 abuts against the side of the air-matching module 3 to achieve fixation at both ends.

[0054] When the sampling device 100 is placed on the fixing module 300, the gravity of the sampling device 100 drives the first fixing seat 41 to move downward, that is, the second connecting column 422 moves downward along the through hole set in the first connecting column 421, and the first elastic member 2145 is compressed. The first fixing seat 41 moves downward, and the first fixing seat 41 can drive the rotating member 7 of the sample arrangement module 500 to rotate, and the rotating member 7 rotates to drive the sample arrangement tube 8 to connect with the sample arrangement port 213 of the sampling device 100. In addition, the test tube loading module 400 transfers the test tube to the slide, and the blocking device on the slide blocks the test tube at the sampling position.

[0055] At this time, the driving mechanism 13 drives the cam 133 to rotate, so that the sealing assembly 214 opens the sample discharge port 213, and the water in the sampling chamber 211 can flow into the test tube through the sample discharge port 213, the sample discharge tube 8, and the drainage groove 6, completing the sampling operation. After the sampling is completed, the blocking device releases the sampled test tube, so that the test tube is transferred to the transfer position through the slide, and then the grabbing module 700 transfers the test tube to the monitoring position of the water quality monitor.

[0056] When the sampling device 100 is removed from the fixing module 300, the first fixing seat 41 loses the gravity of the sampling device 100, and the first fixing seat 41 is lifted up along the first connecting column 421 by the elastic force of the second elastic member 423. The lifting of the first fixing seat 41 drives the rotating member 7 to rotate, so that the rotating member 7 drives the sample discharge tube 8 away from the sample discharge port 213 of the sampling device 100.

[0057] See also Fig. 9 The present invention also provides a sampling method for water quality monitoring, comprising: S101: Obtain the depth of the water source to be sampled where the sampling device 100 is located. When the depth meets the first preset condition, open the sampling port 212 of one of the sampling mechanisms 21 and use the water pump 124 to pump out the water in the second counterweight module 1.

[0058] Before the sampling device 100 samples the water source to be sampled, the depth of the water source to be sampled by each sampling mechanism 21 is set through the depth setting module. For example, the sampling depth of one sampling mechanism 21 is set to 1 meter, and the sampling depth of the other sampling mechanism 21 is set to 2 meters. It can be understood that the sampling depth is a range value. For example, when the sampling depth is set to 1 meter, the effective range of the sampling depth is 0.8 meters to 1.2 meters.

[0059] After the sampling device 100 is placed on the surface of the water source to be sampled, the sampling device 100 uses the counterweight module 1 to keep it in a vertical position. At this time, the counterweight module 1 of the sampling device 100 pumps water into the accommodating chamber 121 of the second counterweight mechanism 12 through the water pump 124, so that it sinks into the water source to be sampled. When the first sensing component senses that the amount of water in the second counterweight module 1 is greater than the preset value, that is, when the gravity of the sampling device 100 is greater than the buoyancy, the water pump 124 stops pumping water into the second counterweight module 1.

[0060] When the second sensing component detects that the sampling device 100 sinks to the sampling depth range of one of the sampling mechanisms 21, that is, the depth meets the first preset condition, the driving mechanism 13 on the weighing module drives the sealing component 214 of the corresponding sampling mechanism 21 to move to open the sampling port 212, and water enters the sampling cavity 211 through the sampling port 212. At this time, the water pump 124 stops pumping water into the accommodating cavity 121 of the second counterweight module 1, so that the sampling device 100 is suspended within the corresponding sampling depth range, or the sinking speed of the sampling device 100 is slowed down, so that the sampling mechanism 21 completes sampling. It can be understood that the sampling device 100 is suspended within the sampling depth range, that is, when the gravity of the sampling device 100 is equal to the buoyancy, the suspension can be completed. In one embodiment, since the sampling port 212 continuously takes water into the sampling cavity 211 of the sampling mechanism 21 , in order to enable the sampling device 100 to be within a predetermined sampling depth range, the water pump 124 can continuously discharge water outward, and the drainage speed is equal to the water intake speed of the sampling port 212 .

[0061] S102 : obtaining the amount of water in the corresponding sampling mechanism 21 , and when the amount of water meets a second preset condition, closing the sampling port 212 of the corresponding sampling mechanism 21 , and using the water pump 124 to pump water into the second counterweight module 1 .

[0062] When the corresponding sampling mechanism 21 is filled with water or filled to a preset value, that is, when the water volume meets the second preset condition, the driving mechanism 13 is used to drive the corresponding sealing component 214 to move and close the corresponding sampling port 212, that is, the sampling of the sampling mechanism 21. At this time, the water pump 124 is used to pump water into the second counterweight module 1, so that the sampling device 100 sinks to the next sampling depth range, and the sampling operation is continued until all sampling mechanisms 21 have completed sampling. When all sampling mechanisms 21 have completed sampling, the water pump 124 can be used to pump out the water in the second counterweight module 1, so that the sampling device 100 can use the buoyancy of the water to float to the water surface. It can be understood that when the gravity of the sampling device 100 is greater than the buoyancy, the water pump 124 can be turned off, and the sampling device 100 can still sink at this time.

[0063] S103: Obtaining a drainage instruction of the sampling device 100. After the drainage instruction is obtained, opening the sample discharge ports 213 of all the sampling mechanisms 21 to complete the sample discharge.

[0064] The drainage instruction may be issued by the user through the control software, or may be automatically issued after the sampling device 100 is installed on the water quality monitoring system. For example, after a preset time, such as 10s or 20s, after the fixing member 521 of the second fixing seat 52 abuts against the sampling device 100, the sampling device 100 automatically controls the driving mechanism 13 to open the sample discharge ports 213 of all the sampling mechanisms 21 to complete the sample discharge operation. It is understandable that, since the loading capacity of a single test tube is limited, the time interval of the sampling device 100 at the sample discharge port 213 can be set according to the loading capacity of the test tube. For example, when the loading capacity of the test tube is 5ml, the sample discharge volume that can be discharged by the sample discharge port 213 at a time is 5ml.

[0065] In addition, it should be understood that the sampling device provided by the present invention has one cycle when the cam 133 rotates one circle, that is, the cam rotates one circle to complete both sampling and sample discharging operations. After the cam rotates one circle, another sampling and sample discharging cycle begins.

[0066] In summary, the present invention provides a sampling device 100 for water pollution monitoring, a water quality monitoring system and a method. The sampling device 100 is set as an ellipsoidal structure, which includes a counterweight module 1 and a sampling module 2. The counterweight module 1 and the sampling module 2 are sequentially arranged along the long axis of the ellipsoidal structure, so that the sampling device 100 is a tumbler structure, which is convenient for maintaining the sampling device 100 in a vertical state along the long axis, and is convenient for sampling surface water; the weight of the counterweight module 1 can also be changed, and the sampling module 2 includes a plurality of sampling mechanisms 21, so that the sampling device 100 can float or sink in the water source to be sampled, so that samples of different water layers can be obtained at one time; and the driving mechanism 13 can only open a group of sealing components 214 of the sealed sampling port 212 at a time to ensure that each sampling mechanism 21 obtains different samples. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0067] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A sampling device for water pollution monitoring, characterized in that: The sampling device is an ellipsoidal structure, which includes: a counterweight module and a sampling module; The sampling module comprises a plurality of sampling mechanisms, which are detachably connected to each other; the sampling mechanism comprises a sampling cavity, a sampling port, a sample discharge port and two sets of sealing components; the sampling port and the sample discharge port are in communication with the sampling cavity, and the sealing components are arranged in the sampling cavity, wherein one set of the sealing components is used to seal the sampling port, and the other set of the sealing components is used to seal the sample discharge port; The counterweight module drives the sampling device to descend or ascend to different depths by changing its own weight; the counterweight module includes a driving mechanism, which is used to drive the sealing assembly to move so as to open or seal the sampling port and the sample discharge port; the driving mechanism can only drive one group of the sealing assemblies that seal the sampling port to move at a time; The counterweight module is detachably connected to the sampling module; the counterweight module and the plurality of sampling mechanisms are arranged in sequence along the long axis of the sampling device.

2. A sampling device for water pollution monitoring according to claim 1, characterized in that: The counterweight module comprises a first counterweight mechanism and a second counterweight mechanism, wherein the first counterweight mechanism and the second counterweight mechanism are sequentially arranged along the long axis of the sampling device; the second counterweight mechanism and the sampling mechanism are detachably connected; The second counterweight mechanism comprises a receiving chamber, a water inlet and a water outlet communicated with the receiving chamber, a water pump is arranged in the receiving chamber, and the water pump is used to pump water into the receiving chamber through the water inlet to drive the sampling device to sink or to discharge water to the outside of the receiving chamber through the water outlet to drive the sampling device to float; The driving mechanism is disposed in the first counterweight mechanism, and the driving mechanism passes through the second counterweight mechanism and is connected to the sealing assembly; And / or, the sealing assembly for sealing the sampling port provided on each of the sampling mechanisms is staggered along the long axis of the sampling device; And / or, the sealing assembly for sealing the sampling port provided on each of the sampling mechanisms is staggered along the circumference or the minor axis of the sampling device.

3. A sampling device for water pollution monitoring according to claim 1, characterized in that: The driving mechanism includes a motor, a transmission member and a plurality of cams; The plurality of cams are respectively connected to the sealing components arranged on the sampling mechanism; the motor drives the transmission member to rotate, thereby driving the cams to rotate; The central axis of the transmission member coincides with the major axis of the ellipsoidal structure; The cam is provided with a plurality of notches along its circumference. When the notches are connected to the sealing component, the sealing component opens the sampling port or the sample discharge port.

4. A sampling device for water pollution monitoring according to claim 3, characterized in that: The sampling mechanism comprises a first shell and a second shell; the first shell and the second shell enclose the sampling cavity; the sampling port and the sample discharge port are arranged on the first shell; The second shell is a hollow cylindrical structure, the cam is arranged in the second shell, and a first through hole is arranged on the second shell; one end of the sealing component is connected to the sampling port or the sample discharge port, and the other end is connected to the cam through the first through hole.

5. A sampling device for water pollution monitoring according to claim 4, characterized in that: The sealing assembly comprises a first connecting member, a sealing member connected to the sampling port or the sample discharge port, an abutting member connected to the cam, and a first elastic member; The sealing member and the abutting member are respectively arranged at one end of the first connecting member; A first abutment portion is provided on the inner side wall of the first through hole at one end away from the sampling cavity, a second abutment portion is provided at one end of the first connecting piece close to the abutment portion, and the first elastic piece is sleeved on the first connecting piece, one end of which is connected to the first abutment portion, and the other end is connected to the second abutment portion.

6. A sampling device for water pollution monitoring according to claim 5, characterized in that: A support member for supporting the first connecting member is also provided at the bottom of the sampling cavity, and the support member is connected to an end of the first connecting member close to the sampling port or the sample discharge port; And / or, the first housing includes a first sub-housing and a second sub-housing; the first sub-housing is a groove-shaped structure, and the second sub-housing is arranged on the top of the first sub-housing and is detachably connected to the first sub-housing; And / or, the sampling device further comprises a space-matching module, the space-matching module is connected to the weight-matching module via the sampling module, a cavity is arranged in the space-matching module; a second connecting member for connecting to the driving mechanism is arranged at the bottom of the space-matching module; And / or, the sampling mechanism and the counterweight module are further provided with a first sensing component for sensing water volume; And / or, the sampling device further comprises a second sensing component for sensing the depth of the sampling device.

7. A water quality monitoring system, characterized in that: The sampling device for water pollution monitoring comprises the sampling device for water pollution monitoring as claimed in any one of claims 1 to 6, and further comprises a water quality monitor, a fixing module, a test tube loading module, a sample arrangement module, a transfer module, a grabbing module, and a base; The water quality monitor, the fixing module, the test tube loading module, the sample arrangement module, the transfer module, and the grabbing module are arranged on the base; The test tube loading module is connected to the transfer module and is used to provide test tubes to the transfer module; The fixing module is used to fix the sampling device; the sample discharge module is connected to the fixing module and the transfer module; the fixing module is also used to drive the sampling module to connect with the sample discharge port of the sampling device; the sample discharge module is used to discharge the sample in the sampling device into the test tube; the grabbing module is used to place the test tube in the transfer module into the monitoring position of the water quality monitor.

8. A water quality monitoring system according to claim 7, characterized in that: The fixing module comprises a first fixing assembly, the first fixing assembly comprises a first fixing seat and a shock absorbing assembly, one end of the shock absorbing assembly is connected to the first fixing seat, and the other end is connected to the base; the arrangement module is rotatably connected to the first fixing seat; The shock absorbing assembly includes a first connecting column, a second connecting column and a second elastic member; the first connecting column is arranged on the base, and is provided with a through hole for accommodating the second connecting column; one end of the second connecting column is connected to the first fixing seat, and the other end is passed through the through hole; the second elastic member is sleeved on the second connecting column, one end of which is connected to the first fixing seat, and the other end is connected to the first connecting column.

9. A water quality monitoring system according to claim 8, characterized in that: The fixing module further comprises a second fixing assembly, the second fixing assembly comprises a mounting plate and a second fixing seat; the mounting plate is connected to the base via a supporting column, the second fixing seat is rotatably connected to the mounting plate, and a plurality of fixing members for abutting against the sampling device are arranged on the second fixing seat; And / or, the sample discharge module includes a drainage groove, a rotating part and a sample discharge tube; the drainage groove is connected to the transfer module, and the sample discharge tube is arranged on the rotating part, one end of which is used to connect with the drainage groove, and the other end is used to connect with the sample discharge port; the rotating part is rotatably arranged on the base and is rotatably connected to the first fixed seat.

10. A method for using a sampling device for water pollution monitoring, characterized in that: A water intake device for water pollution monitoring as claimed in any one of claims 1 to 6, comprising: Obtaining the depth of the water source to be sampled where the sampling device is located, and when the depth meets the first preset condition, opening the sampling port of the corresponding sampling mechanism and using a water pump to pump out the water in the second counterweight module; Acquire the amount of water in the corresponding sampling mechanism, and when the amount of water meets the second preset condition, close the sampling port of the corresponding sampling mechanism, and use a water pump to pump water into the second counterweight module; Obtain the drainage instruction of the sampling device. After obtaining the drainage instruction, open the drainage ports of all sampling mechanisms to complete the drainage.

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