A sampling device for water quality monitoring

Abstract

The present invention belongs to the technical field of water quality sampling devices, and specifically is a sampling device for water quality monitoring, comprising a pull rope, one end of which is connected to an upper sampling cylinder, a floating ring movably installed on the outer side of the bottom of the upper sampling cylinder, a lower sampling cylinder movably installed inside the floating ring, a lifting component is installed between the upper sampling cylinder and the lower sampling cylinder, and the lower sampling cylinder is lowered in the water until it reaches a certain depth in the water. After a period of standing, the water quality at this depth is sampled by the suction structure inside the lower sampling cylinder, the upper sampling cylinder is connected to the floating ring through an electrically driven mounting structure, after the lower sampling cylinder samples at the required depth, the upper sampling cylinder and the floating ring are separated, and under the action of the gravity of the upper sampling cylinder, the upper sampling cylinder descends inside the floating ring until it is submerged in water, and after a period of standing, the upper sampling cylinder can sample the water quality at this depth through the internal water suction structure, and can sample water quality at different depths with a large spacing.

Description

Technical Field

[0001] The invention belongs to the field of water quality sampling devices, in particular to a sampling device for water quality monitoring. Background Art

[0002] Water quality sampling is an important part of water quality monitoring. Water quality sampling can obtain data on the physical, chemical and biological properties of water bodies, thereby comprehensively evaluating the current condition of water bodies. Water bodies are an important part of the ecosystem, and water quality directly affects the survival and reproduction of aquatic organisms. Water quality sampling can play an important role in assessing the ecological health of water bodies, monitoring harmful substances in water bodies, and providing a scientific basis for ecological protection measures. Traditionally, when sampling mineral surface water, water containers are usually used for sampling.

[0003] A patent document with publication number CN110907231A discloses a stratified sampling device for water quality monitoring, which includes an outer shell and an inner shell. A first compression spring is installed between the inner shell and the bottom of the outer shell. A first water inlet is opened on the left side wall of the outer shell. The inner shell is divided into multiple water storage chambers. A second water inlet is opened on the top of the left side wall of each water storage chamber. A spring block that can pop out inward is installed on the right side wall of the outer shell. A vertical slide is opened on the right side wall of each water storage chamber. The depths of the multiple slides decrease from top to bottom according to an arithmetic progression.

[0004] In traditional technical solutions, water quality is sampled through water containers, but the sampling results may be different in mineral surface water at different depths. Therefore, it is necessary to sample water quality at different depths. Multiple groups of samples can effectively and accurately monitor data. Traditional technical solutions generally achieve this goal by setting different cavities in the sampling device for stratified sampling. However, at this time, the source depth of water quality samples is relatively small, which makes it difficult to provide good auxiliary effects for subsequent monitoring.

[0005] To this end, the present invention provides a sampling device for water quality monitoring. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: a sampling device for water quality monitoring according to the present invention includes a pull rope, one end of which is connected to an upper sampling barrel, characterized in that a floating ring is movably mounted on the outer side of the bottom of the upper sampling barrel, a lower sampling barrel is movably mounted inside the floating ring, a lifting component is installed between the upper and lower sampling barrels, the lifting component is used to adjust the distance between the upper and lower sampling barrels, the upper and lower sampling barrels are components made of the same structure, and the upper and lower sampling barrels are movably mounted inside the floating ring in the same vertical position;

[0008] A lifting component 2 is movably installed inside the floating ring, one end of which is connected to the outer side of the bottom of the upper sampling tube. The lifting component 2 is used to adjust the distance between the upper sampling tube and the floating ring. Water intake structures are installed inside the upper sampling tube and the lower sampling tube.

[0009] Preferably, the lifting member 1 and the lifting member 2 are both rope structures, and the distance between the upper sampling cylinder and the lower sampling cylinder and the distance between the upper sampling cylinder and the floating ring are adjusted by winding and unwinding the ropes.

[0010] Preferably, a plurality of small air pumps and fixed blocks are installed above the floating ring, a through groove is provided inside the floating ring, and the upper sampling tube and the lower sampling tube are both movably installed inside the through groove.

[0011] Preferably, a storage cavity is provided inside the fixed block, the end portion of the second lifting member is located inside the storage cavity, and the other end of the second lifting member is fixedly connected to the outer side of the bottom of the upper sampling cylinder.

[0012] Preferably, a movable ring piece is movably installed on the inner side of the through groove, and the movable ring piece is moved by electric drive. An L-shaped groove is also provided on the inner side of the through groove, and the L-shaped groove is connected to the storage cavity.

[0013] Preferably, a plurality of annular grooves are provided at the bottom of the upper sampling cylinder, and the plurality of annular grooves match the plurality of movable ring pieces.

[0014] Preferably, an annular cavity is opened on the bottom side of the floating ring, an annular airbag is fixedly installed inside the annular cavity, the small air pump is connected to the annular airbag through an air pipe, and multiple bottom ring pieces are installed on one side of the annular airbag, and the multiple bottom ring pieces form an annular structure.

[0015] Preferably, a chassis is fixedly installed on the inner bottom of the upper sampling cylinder, and a middle cylinder and multiple side cylinders are installed above the chassis. A through groove is opened inside the side cylinder, and the through groove is connected to the outside of the upper sampling cylinder. A winding wheel is movably installed inside the through groove, and one end of the lifting component is wrapped around the outside of the winding wheel.

[0016] Preferably, a telescopic motor is fixedly installed inside the middle cylinder, an upper plate is fixedly installed above the chassis, a telescopic rod is installed at the output end of the telescopic motor, one end of the telescopic rod extends through and extends to the top of the upper plate, a piston and a conical sampling cylinder are installed at the upper end of the telescopic rod, the conical sampling cylinder is a hollow structure, and a plurality of water pumping valves are fixedly installed above the conical sampling cylinder.

[0017] Preferably, a plurality of water inlet grooves are provided on the top of the upper sampling cylinder, and the plurality of water inlet grooves and the plurality of corresponding water pumping valves are in the same vertical position.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The present invention relates to a sampling device for water quality monitoring. The floating ring is above the water surface to provide buoyancy. That is, the upper sampling tube is above the water surface at this time. The lifting member is used to adjust the distance between the upper sampling tube and the lower sampling tube. At this time, the upper sampling tube is connected to the floating ring through the mounting structure. When the lifting member is activated, the distance between the upper sampling tube and the lower sampling tube is increased. Due to the gravity of the lower sampling tube itself, the lower sampling tube descends in the water until it reaches a certain depth in the water. After a period of rest, the lower sampling tube is lowered by the inner portion of the lower sampling tube. The suction structure at the bottom samples the water quality at this depth for subsequent monitoring through water quality samples. The upper sampling tube is connected to the floating ring through an electrically driven mounting structure. After the lower sampling tube samples at the required depth, the electrically driven structure separates the upper sampling tube and the floating ring. Under the action of gravity, the upper sampling tube descends inside the floating ring until it is submerged in water. After a period of standing still, the upper sampling tube can sample the water quality at this depth through the internal water absorption structure, and can sample water quality at different depths with a large spacing.

[0020] 2. The sampling device for water quality monitoring described in the present invention, after the lower sampling tube is lowered to the required sampling depth, it is allowed to stand for a period of time, and the multiple pumping valves provided inside the lower sampling tube are electrically driven to allow water at this depth to enter the conical sampling tube through the pumping valves. That is, at this time, the conical sampling tube can store mineral area water of a specified depth. After the cooperation of the moving ring piece and the annular groove, the upper sampling tube will be lowered into the water. At this time, the stretched multiple lifting components control the depth of the upper sampling tube in the water. After standing for a period of time, the water quality at this depth is sampled through the pumping valve provided inside the upper sampling tube.

[0021] 3. The sampling device for water quality monitoring described in the present invention can ascend by reeling in a lifting component after sampling water at a set depth through a lower sampling tube. At this time, the telescopic rod is contracted by the electric drive of the telescopic motor, thereby driving the piston and the conical sampling tube to descend. That is, during the ascending process from a deep depth to the surface position, the mixed water enters the interior of the upper sampling tube through multiple water inlet troughs. When the upper sampling tube is lifted up by a pull rope, the mixed water from the set depth of the upper sampling tube to the water surface will enter the interior of the upper sampling tube, which can enrich the sampled water quality samples and thus accurately perform subsequent water quality monitoring data. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 It is an overall stereogram of the present invention;

[0024] Figure 2 It is a three-dimensional schematic diagram of the upper sampling tube and the lower sampling tube in the present invention;

[0025] Figure 3 It is a three-dimensional schematic diagram of the through slot and the lifting member in the present invention;

[0026] Figure 4 It is a three-dimensional schematic diagram of the lifting component 1 and the lifting component 2 in the present invention;

[0027] Figure 5 It is a three-dimensional schematic diagram of the floating ring and the upper sampling tube in the present invention;

[0028] Figure 6 It is a three-dimensional schematic diagram of the annular airbag in the present invention;

[0029] Figure 7 It is a three-dimensional schematic diagram of the middle cylinder and the side cylinder in the present invention;

[0030] Figure 8 It is a three-dimensional schematic diagram of the upper sampling tube and the conical sampling tube in the present invention.

[0031] In the figure: 1. Floating ring; 11. Small air pump; 12. Fixed block; 121. Storage chamber; 13. Through groove; 131. Movable ring piece; 132. L-shaped groove; 14. Annular chamber; 15. Annular air bag; 16. Bottom ring piece; 2. Upper sampling tube; 21. Annular groove; 22. Chassis; 23. Middle cylinder; 231. Telescopic motor; 232. Telescopic rod; 24. Side cylinder; 241. Through groove; 242. Fixed motor; 243. Winding wheel; 25. Upper plate; 26. Conical sampling tube; 27. Pumping valve; 28. Piston; 29. ​​Water inlet trough; 3. Lower sampling tube; 4. Pull rope; 5. Lifting component one; 6. Lifting component two. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0033] Example 1: Figure 1-4 As shown, a sampling device for water quality monitoring according to an embodiment of the present invention includes a pull rope 4, one end of which is connected to an upper sampling tube 2. The device is characterized in that: a floating ring 1 is movably mounted on the outer side of the bottom of the upper sampling tube 2, a lower sampling tube 3 is movably mounted inside the floating ring 1, a lifting member 5 is installed between the upper sampling tube 2 and the lower sampling tube 3, the lifting member 5 is used to adjust the distance between the upper sampling tube 2 and the lower sampling tube 3, the upper sampling tube 2 and the lower sampling tube 3 are components made of the same structure, and the upper sampling tube 2 and the lower sampling tube 3 are movably mounted inside the floating ring 1 in the same vertical position;

[0034] A lifting component 6 is movably installed inside the floating ring 1. One end of the lifting component 6 is connected to the outer side of the bottom of the upper sampling tube 2. The lifting component 6 is used to adjust the distance between the upper sampling tube 2 and the floating ring 1. Water intake structures are installed inside the upper sampling tube 2 and the lower sampling tube 3.

[0035] Specifically, when it is necessary to monitor the water quality in a mineral area, it is necessary to sample the water quality. In order to enrich the monitoring data, it is necessary to sample the water quality at different depths in the mineral area. By reeling and unreeling the pull rope 4, the floating ring 1, the upper sampling tube 2 and the lower sampling tube 3 are moved in the water to the position where sampling is required. At this time, the lower sampling tube 3 is in the water, and the floating ring 1 is above the water surface to provide buoyancy, that is, the upper sampling tube 2 is above the water surface at this time. The upper sampling tube 2 and the lower sampling tube 3 are connected by a lifting member 15, and the lifting member 15 is used to adjust the distance between the upper sampling tube 2 and the lower sampling tube 3. The lifting member 15 can be a traditional rope, telescopic structure and elastic structure. At this time, the upper sampling tube 2 is connected to the floating ring 1 through the mounting structure, and the lifting member 15 is in action. At this time, the distance between the upper sampling tube 2 and the lower sampling tube 3 is increased. After the water is pumped in the water, the upper sampling tube 2 is pulled back to the bottom of the float 1 and the upper sampling tube 2 is pulled back to the bottom of the float 1.

[0036] like Figure 2-5 As shown, the lifting member 1 5 and the lifting member 2 6 are both rope structures. The distance between the upper sampling tube 2 and the lower sampling tube 3 and the distance between the upper sampling tube 2 and the floating ring 1 are adjusted by winding and unwinding the rope. A plurality of small air pumps 11 and a fixing block 12 are installed above the floating ring 1. A through groove 13 is opened through the interior of the floating ring 1. The upper sampling tube 2 and the lower sampling tube 3 are both movably installed inside the through groove 13.

[0037] A storage cavity 121 is provided inside the fixed block 12 , and the end of the second lifting member 6 is located inside the storage cavity 121 . The other end of the second lifting member 6 is fixedly connected to the outer side of the bottom of the upper sampling tube 2 .

[0038] A movable ring piece 131 is movably installed on the inner side of the through groove 13, and the movable ring piece 131 is moved by electric drive. An L-shaped groove 132 is also provided on the inner side of the through groove 13, and the L-shaped groove 132 is connected to the storage chamber 121. A plurality of annular grooves 21 are provided at the bottom of the upper sampling tube 2, and the plurality of annular grooves 21 match the plurality of movable ring pieces 131.

[0039] Specifically, the movable ring piece 131 is movably installed inside the floating ring 1 and is displaced by an electric drive structure. This electric structure can be a telescopic rod or the like. When the movable ring piece 131 moves to the inside of the annular groove 21, the upper sampling tube 2 is installed with the floating ring 1, and the upper sampling tube 2 will not separate from the floating ring 1 due to gravity. When the movable ring piece 131 is no longer inside the annular groove 21, the upper sampling tube 2 will descend inside the floating ring 1 due to gravity. One end of the lifting component 26 is coiled inside the storage cavity 121, and the other end is installed on the outside of the bottom of the upper sampling tube 2, and the lifting component 26 is partially located inside the through groove 13 inside the L-shaped groove 132. When the upper sampling tube 2 separates from the floating ring 1 and descends inside the floating ring 1, the coiled end of the lifting component 26 will straighten, that is, the length of the lifting component 26 affects the distance between the upper sampling tube 2 and the floating ring 1.

[0040] like Figure 6 As shown, an annular cavity 14 is provided on the bottom side of the floating ring 1, an annular airbag 15 is fixedly installed inside the annular cavity 14, a small air pump 11 is connected to the annular airbag 15 through an air pipe, and a plurality of bottom ring pieces 16 are installed on one side of the annular airbag 15, forming an annular structure.

[0041] Specifically, the annular airbag 15 is inflated by injecting air into the electrically driven small air pump 11. At this time, the multiple bottom ring pieces 16 will be in a circular state. The multiple bottom ring pieces 16 will contact the water surface. The maximum contact area with the water can provide better buoyancy. When the upper sampling tube 2 and the lower sampling tube 3 perform water quality sampling at different depths, the floating ring 1 always floats on the water surface, ensuring the subsequent recovery of the sampling structure.

[0042] Example 2: Figure 7-8 As shown, compared with Example 1, another embodiment of the present invention is: a chassis 22 is fixedly installed on the inner bottom of the upper sampling tube 2, and a middle cylinder 23 and multiple side cylinders 24 are installed above the chassis 22. A through groove 241 is opened inside the side cylinder 24, and the through groove 241 is connected to the outside of the upper sampling tube 2. A winding wheel 243 is movably installed inside the through groove 241, and one end of the lifting component 5 is wrapped around the outside of the winding wheel 243.

[0043] A telescopic motor 231 is fixedly installed inside the middle cylinder 23, an upper plate 25 is fixedly installed above the chassis 22, a telescopic rod 232 is installed at the output end of the telescopic motor 231, one end of the telescopic rod 232 extends through and extends to the top of the upper plate 25, a piston 28 and a conical sampling cylinder 26 are installed at the upper end of the telescopic rod 232, the conical sampling cylinder 26 has a hollow structure, and a plurality of pumping valves 27 are fixedly installed above the conical sampling cylinder 26.

[0044] A plurality of water inlet grooves 29 are provided on the top of the upper sampling tube 2 , and the plurality of water inlet grooves 29 and the plurality of corresponding water pumping valves 27 are located at the same vertical position.

[0045] Specifically, in the initial state, the positions of multiple pumping valves 27 are located inside the corresponding water inlet trough 29. The upper sampling tube 2 and the lower sampling tube 3 are components made of the same structure, so the sampling principles of the two are the same. First, the winding wheel 243 is rotated by the electric drive of the fixed motor 242, and then the lifting component 5 is unwound. At this time, the lower sampling tube 3 will fall into the water due to gravity. As the lifting component 5 is continuously unwound, the lower sampling tube 3 will continue to descend in the water. After descending to the required sampling depth, it will stand for a period of time, and the multiple pumping valves 27 set inside the lower sampling tube 3 are electrically driven to allow the water at this depth to enter the conical sampling tube 26 through the pumping valves 27. That is, at this time, the conical sampling tube 26 can store mineral area water of a specified depth, through the cooperation of the moving ring piece 131 and the annular groove 21. After that, the upper sampling tube 2 will descend into the water. At this time, the stretched multiple lifting components 26 control the depth of the upper sampling tube 2 in the water. After standing for a period of time, the water quality at this depth is sampled through the pumping valve 27 arranged inside the upper sampling tube 2. After the lower sampling tube 3 samples the water quality at the set depth, it can be raised by the winding of the lifting component 1 5. At this time, the telescopic rod 232 is contracted by the electric drive of the telescopic motor 231, thereby driving the piston 28 and the conical sampling tube 26 to descend. That is, during the ascent from the deep to the surface position, the mixed water quality enters the interior of the upper sampling tube 2 through the multiple water inlet grooves 29, and when the upper sampling tube 2 is pulled up by the pull rope 4, the mixed water quality in the process from the set depth of the upper sampling tube 2 to the water surface will enter the interior of the upper sampling tube 2, which can enrich the sampled water quality samples and thus accurately perform subsequent water quality monitoring data.

[0046] Working principle: When it is necessary to monitor the water quality in a mineral area, it is necessary to sample the water quality. In order to enrich the monitoring data, it is necessary to sample the water quality at different depths in the mineral area. By reeling and unreeling the pull rope 4, the floating ring 1, the upper sampling tube 2 and the lower sampling tube 3 are moved in the water to the position where sampling is required. At this time, the lower sampling tube 3 is in the water, and the floating ring 1 is above the water surface, providing buoyancy, that is, the upper sampling tube 2 is above the water surface at this time. The upper sampling tube 2 and the lower sampling tube 3 are connected by a lifting member 5, and the lifting member 5 is used to adjust the distance between the upper sampling tube 2 and the lower sampling tube 3. The lifting member 5 can be a traditional rope, telescopic structure and elastic structure. At this time, the upper sampling tube 2 is connected to the floating ring 1 through the mounting structure, and the lifting member 5 is in action. At this time, the distance between the upper sampling tube 2 and the lower sampling tube 3 is increased. Because the lower sampling tube 3 itself is heavy, the lifting member 5 can be used to adjust the distance between the upper sampling tube 2 and the lower sampling tube 3. The upper sampling tube 2 is connected to the floating ring 1 through an electrically driven mounting structure. After the lower sampling tube 3 has sampled at the desired depth, the electrically driven structure separates the upper sampling tube 2 and the floating ring 1. Under the action of gravity, the upper sampling tube 2 descends inside the floating ring 1 until it is submerged in the water. After a period of rest, the upper sampling tube 2 can sample the water quality at this depth through its internal water-absorbing structure. The water quality at different depths with a large spacing can be sampled, and the spacing between the lower sampling tube 3 and the upper sampling tube 2 can be adjusted to prevent the lower sampling tube 3 from touching the bottom when sampling deeper water, resulting in the presence of large impurities in the sampled water. In the initial state,Multiple pumping valves 27 are located inside the corresponding water inlet trough 29. The upper sampling tube 2 and the lower sampling tube 3 are components made of the same structure, so the sampling principles of the two are the same. First, the winding wheel 243 is rotated by the electric drive of the fixed motor 242, and then the lifting component 5 is unwound. At this time, the lower sampling tube 3 will fall into the water due to gravity. As the lifting component 5 is continuously unwound, the lower sampling tube 3 will continue to descend in the water. After descending to the required sampling depth, it will stand for a period of time, and the multiple pumping valves 27 set inside the lower sampling tube 3 are electrically driven to allow the water at this depth to enter the conical sampling tube 26 through the pumping valves 27. That is, at this time, the conical sampling tube 26 can store mineral area water of a specified depth. After the upper sampling tube 3 is moved and matched with the annular groove 21, the upper sampling tube 3 is The cylinder 2 will descend into the water. At this time, the stretched multiple lifting members 2 6 control the underwater depth of the upper sampling cylinder 2. After a period of quiescence, the water quality at this depth is sampled through the water pump valve 27 installed inside the upper sampling cylinder 2. After the lower sampling cylinder 3 samples the water quality at the set depth, it can be raised by reeling in the lifting member 1 5. At this time, the telescopic rod 232 is electrically driven by the telescopic motor 231 to contract, thereby driving the piston 28 and the conical sampling cylinder 26 to descend. That is, during this ascent from the depth to the surface, the mixed water quality enters the interior of the upper sampling cylinder 2 through the multiple water inlet grooves 29. When the upper sampling cylinder 2 is lifted by the pull rope 4, the mixed water quality from the set depth of the upper sampling cylinder 2 to the water surface will enter the interior of the upper sampling cylinder 2, which can enrich the sampled water quality samples and thus accurately obtain the subsequent water quality monitoring data.

[0047] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A sampling device for water quality monitoring, comprising a pull rope (4), one end of which is connected to an upper sampling tube (2), characterized in that: A floating ring (1) is movably mounted on the outer side of the bottom of the upper sampling cylinder (2), and a lower sampling cylinder (3) is movably mounted inside the floating ring (1). A lifting component (5) is mounted between the upper sampling cylinder (2) and the lower sampling cylinder (3). The lifting component (5) is used to adjust the distance between the upper sampling cylinder (2) and the lower sampling cylinder (3). The upper sampling cylinder (2) and the lower sampling cylinder (3) are components made of the same structure, and the upper sampling cylinder (2) and the lower sampling cylinder (3) are movably mounted inside the floating ring (1) at the same vertical position. A second lifting member (6) is movably installed inside the floating ring (1), one end of the second lifting member (6) is connected to the outer side of the bottom of the upper sampling tube (2), and the second lifting member (6) is used to adjust the distance between the upper sampling tube (2) and the floating ring (1). Water intake structures are installed inside the upper sampling tube (2) and the lower sampling tube (3); A chassis (22) is fixedly mounted on the inner bottom of the upper sampling cylinder (2), a middle cylinder (23) and a plurality of side cylinders (24) are mounted above the chassis (22), a through slot (241) is provided inside the side cylinder (24), the through slot (241) is connected to the outside of the upper sampling cylinder (2), a reel (243) is movably mounted inside the through slot (241), and one end of the lifting member (5) is wrapped around the outside of the reel (243); A telescopic motor (231) is fixedly installed inside the middle cylinder (23), an upper plate (25) is fixedly installed above the bottom plate (22), a telescopic rod (232) is installed at the output end of the telescopic motor (231), one end of the telescopic rod (232) extends through the upper side of the upper plate (25), a piston (28) and a conical sampling cylinder (26) are installed at the upper end of the telescopic rod (232), the conical sampling cylinder (26) is a hollow structure, and a plurality of pumping valves (27) are fixedly installed above the conical sampling cylinder (26); A plurality of water inlet grooves (29) are provided on the top of the upper sampling cylinder (2), and the plurality of water inlet grooves (29) and the plurality of corresponding water pumping valves (27) are located at the same vertical position.

2. A water quality monitoring sampling device according to claim 1, characterized in that: The lifting member 1 (5) and the lifting member 2 (6) are both rope structures, and the spacing between the upper sampling cylinder (2) and the lower sampling cylinder (3) and the spacing between the upper sampling cylinder (2) and the floating ring (1) are adjusted by reeling and unreeling the ropes.

3. A water quality monitoring sampling device according to claim 1, characterized in that: A plurality of small air pumps (11) and a fixed block (12) are installed above the floating ring (1). A through groove (13) is provided through the interior of the floating ring (1). The upper sampling tube (2) and the lower sampling tube (3) are both movably installed inside the through groove (13).

4. A water quality monitoring sampling device according to claim 3, characterized in that: A storage cavity (121) is provided inside the fixed block (12), the end of the second lifting member (6) is located inside the storage cavity (121), and the other end of the second lifting member (6) is fixedly connected to the outer side of the bottom of the upper sampling cylinder (2).

5. A water quality monitoring sampling device according to claim 4, characterized in that: A movable ring piece (131) is movably mounted on the inner side of the through-groove (13), and the movable ring piece (131) is moved by electric drive. An L-shaped groove (132) is also provided on the inner side of the through-groove (13), and the L-shaped groove (132) is connected to the storage cavity (121).

6. A water quality monitoring sampling device according to claim 5, characterized in that: A plurality of annular grooves (21) are provided at the bottom of the upper sampling cylinder (2), and the plurality of annular grooves (21) match the plurality of movable ring pieces (131).

7. A water quality monitoring sampling device according to claim 3, characterized in that: An annular cavity (14) is provided on the bottom side of the floating ring (1), an annular airbag (15) is fixedly installed inside the annular cavity (14), the small air pump (11) is connected to the annular airbag (15) through an air pipe, and a plurality of bottom ring pieces (16) are installed on one side of the annular airbag (15), and the plurality of bottom ring pieces (16) form an annular structure.

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