A sampling device for water environment monitoring

Abstract

The application discloses a sampling device for water environment monitoring and belongs to the technical field of sampling devices. The sampling device for water environment monitoring comprises a buoy and two sampling tanks. The side wall of the buoy is provided with a pull rod. The side wall of the pull rod is fixedly connected with two side rods. The bottom wall of the buoy is fixedly connected with two extension rods. Two groups of upper and lower fixed rods are fixedly connected between the two extension rods. Each group of the fixed rods is fixedly connected with the side wall of the two extension rods. The two fixed rods are slidingly connected with the inner walls of two vertical grooves. The side walls of the two sampling tanks are respectively provided with limiting mechanisms for limiting the positions of the fixed rods. In the application, the staff can take out the sampling device from the water by pulling up the pull rod when the buoy normally works. Moreover, the water sample will not be mixed with the upper water during the process of taking out the sampling device from the water, so that the purity of the water sample is ensured.

Description

Technical Field

[0001] This invention belongs to the field of sampling device technology, specifically relating to a sampling device for water environment monitoring. Background Technology

[0002] Water body monitoring is an important component of environmental protection and water resource management, involving the periodic or continuous measurement of various physical, chemical, and biological parameters in water bodies. To ensure water quality meets health and environmental standards, specific sampling devices are required to collect water samples for analysis. Different types of sampling devices are needed depending on whether the monitoring is short-term or long-term, the specific monitoring objectives, the type of water body, and the required accuracy and frequency of the data. Common sampling devices include manual sampling bottles, trawls, unmanned surface vessels (USVs), and buoys.

[0003] Taking buoy-type sampling devices as an example, buoys are typically used for long-term monitoring of the aquatic environment. Upon detecting an anomaly, they send a signal to a base station. Staff then travel to the target water area, collect water samples from the sampling devices at different depths on the bottom of the buoy, and bring the samples back to the research institute for further analysis. However, because the sampling device is underwater, removing it requires flipping or completely lifting the buoy. This is not only laborious for staff, but also, when flipping the buoy, the water sample from the sampling device at the bottom may mix with the water in the upper layer, affecting the final sampling results. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a sampling device for water environment monitoring.

[0005] The technical solution adopted to solve the above technical problems is:

[0006] A sampling device for water environment monitoring includes a buoy and two sampling containers. The buoy has a lifting rod on its sidewall, and two side rods are fixedly connected to the sidewall of the lifting rod. Two extension rods are fixedly connected to the bottom wall of the buoy. Two sets of fixed rods are fixedly connected between the two extension rods, with each set of fixed rods fixedly connected to the sidewall of the two extension rods. Vertical grooves are formed on the sidewalls of both sampling containers, and the two fixed rods are slidably connected to the inner walls of the two vertical grooves. Each sampling container is designed to be open at both ends, and a cover plate is rotatably connected to each end. Horizontal grooves are formed on the sidewalls of the cover plates, and short rods are slidably connected to the horizontal grooves. A vertical rod is fixedly connected to the end of each short rod away from the horizontal groove. A horizontal bar is fixedly connected between the two vertical rods, and a connecting rod is sleeved on the horizontal bar. A fixing block is fixedly connected to the top of the connecting rod, and a fixing hole is formed on the sidewall of the fixing block. The two side rods pass through the fixing holes on the sidewalls of the two fixing blocks. Limiting mechanisms for restricting the position of the fixed rods are provided on the sidewalls of both sampling containers.

[0007] With the above technical solution, staff can lift the sampling device from underwater by raising the lifting rod while the buoy is working normally. Moreover, there is no need to worry about the water sample mixing with the upper water during the process of lifting the sampling device from underwater, thus ensuring the purity of the water sample.

[0008] Furthermore, three counterweights are fixedly installed on the side wall of the buoy. The three counterweights and the lifting rod are located at the four positions of the buoy, and the weight of each counterweight is the same as the weight of the lifting rod plus the side rod.

[0009] The above technical solution allows the weight around the buoy to be balanced, ensuring that the buoy will not tip over due to imbalance when facing wind and waves. The counterweight and lifting rod can also increase the weight of the buoy, lowering its center of gravity and making it less likely to tip over.

[0010] Furthermore, a handle is fixedly connected to the top wall of the lifting rod, and a through hole is opened on the side wall of the lifting rod. A fixing bolt is installed in the through hole, and the other end of the fixing bolt is threadedly connected to the side wall of the buoy.

[0011] With the above technical solution, the fixing bolts can firmly fix the lifting rod to the side wall of the buoy. When the sampling tank does not need to be removed, the lifting rod will be within the protection range of the buoy. The handle can also make it convenient for staff to lift the lifting rod.

[0012] Furthermore, a first limiting ring is fixedly connected to the end of the side rod away from the lifting rod, and a second limiting ring is also fixedly connected to the side wall of the side rod. The diameters of the first limiting ring and the second limiting ring are the same, and the side wall of the second limiting ring facing away from the lifting rod abuts against the side wall of the fixing block.

[0013] With the above technical solution, the side rod passing through the fixing hole can move axially in the fixing hole. In order to ensure that the staff can pull the sampling container laterally, a first limiting ring and a second limiting ring need to be set on the side rod. When the fixing block contacts the first limiting ring or the second limiting ring, it can drive the sampling container to move laterally together.

[0014] Furthermore, a rubber stopper is fixedly installed on the side wall of the cover plate facing the sampling tank opening. The size of the rubber stopper is the same as the size of the sampling tank opening. A locking rod is also fixedly connected to the side wall of the cover plate facing the sampling tank. The locking rod has a locking hole on its side wall. The top walls of the two opening ends of the sampling tank are respectively fixedly connected to locking seats. The locking seats have locking grooves on the side wall facing the cover plate. The locking seats are provided with two symmetrical locking mechanisms for limiting the position of the locking rod.

[0015] With the above technical solution, when the cover is placed on the opening of the sampling tank, the rubber stopper can block the opening of the sampling tank. The deformable rubber stopper seals both ends of the sampling tank, ensuring the purity of the obtained water sample.

[0016] Furthermore, the clamping mechanism includes a push rod, a first rack, a central gear, a second rack, and a insertion rod. The clamping seat has two working chambers located on opposite sides of the clamping slot. One end of the push rod passes through the side wall of the clamping slot, and the other end is fixedly connected to the first rack. The first rack is slidably connected to the bottom wall of the working chamber. The central gear is rotatably connected to the bottom wall of the working chamber. The second rack is slidably connected to the bottom wall of the working chamber. The central gear is located between the first and second racks, meshing with the first rack on one side and with the second rack on the other. The insertion rod is fixedly connected to the side wall of the second rack facing the clamping slot. The side wall of the clamping slot has an insertion hole, the position of which corresponds to the position of the insertion rod. The inner diameter of the insertion hole is the same as the outer diameter of the insertion rod, and the size of the insertion rod is the same as the inner diameter of the insertion hole.

[0017] With the above technical solution, when the cover is flipped up, the rubber stopper blocks the opening of the sampling container, and the locking rod on the side wall of the cover is inserted into the slot, causing the top rod to drive the first rack to move. Under the drive of the central gear, the second rack will drive the insertion rod to pass through the insertion hole. The insertion rod is inserted into the locking hole on the side wall of the locking rod, which can fix the position of the locking rod and the cover.

[0018] Furthermore, short grooves are respectively provided on the opposite side walls of the two card holders. The short grooves are connected to the working cavity. Long rods are slidably connected in the short grooves. The two ends of the long rods are respectively fixedly connected to the side walls of the first rack in the two card holders.

[0019] With the above technical solution, the first rack is driven to move by the push rod, which in turn drives the long rod to slide in the short groove, so that the two long rods between the two holders can move simultaneously toward a position away from the center of the sampling tank.

[0020] Furthermore, the limiting mechanism includes a slider, a top plate, a push rod, two inserts, and two swing rods. The top wall of the sampling tank has a motion groove, the slider is slidably connected to the inner wall of the motion groove, the bottom wall of the top plate is fixedly connected to the top wall of the slider, the side wall of the top plate is fixedly connected to the side wall of the long rod, the side wall of the push rod is fixedly connected to the side wall of the top plate away from the long rod, the push rod is inverted "U" shape, the two inserts are fixedly connected to both ends of the push rod, two central rods are fixedly installed on the side wall of the sampling tank, the two central rods are located on both sides of the vertical groove, the central rods pass through the side wall of the swing rods, the swing rods rotate around the central rods, the swing rods are "L" shaped, a limiting groove is opened on one side wall of the swing rods, the inserts are inserted into the limiting grooves, and the top wall of the other end of the swing rods abuts against the bottom wall of the fixed rod.

[0021] With the above technical solution, the long rod moving along the short groove will drive the top plate to move together, and the slider moving along the moving groove will, together with the top plate, carry the insert block away from the swing rod. Without the restriction of the insert block, the swing rod can rotate freely, thereby releasing the restriction that originally pressed against the bottom of the fixed rod, and the sampling tank can be detached from the fixed rod.

[0022] Furthermore, the end of the clamp rod away from the cover plate is arc-shaped, and the opposite ends of the two top rods are also arc-shaped.

[0023] With the above technical solution, the locking rod will be inserted into the slot together with the cover plate. In order to ensure that the push rod can be pushed into the working cavity by the locking rod, both are set to be arc-shaped, which will make the interaction between the locking rod and the push rod smoother.

[0024] The beneficial effects of this invention are as follows:

[0025] (1) By having staff lift the lifting rod and the side rod upwards, the two sampling tanks at different depths can be taken out at the same time. Staff do not need to flip the buoy. The underwater sampling tanks can be taken out on the horizontal surface, ensuring the safety of staff. Moreover, due to the positional distribution of the counterweight and the lifting rod, the center of gravity of the buoy is lowered, and the buoy will not accidentally flip over, ensuring the long-term operation of the buoy.

[0026] (2) By setting cover plates and limiting mechanisms at both ends of the sampling tank, when the lifting rod is lifted upward, the side rod can cause the upright rod and the short rod to move upward when it drives the connecting rod to move upward. The short rod moving on the side wall of the cover plate can drive the cover plate to flip to the opening end of the sampling tank. The two ends of the sampling tank are blocked by rubber stoppers, so that the water sample is left in the sampling tank. Then the lifting rod can take the sealed sampling tank upward, ensuring that the water sample will not mix with the water in the upper layer. Attached Figure Description

[0027] Figure 1 This is an overall structural diagram of the present invention;

[0028] Figure 2 This is a diagram showing the connection structure between the lifting rod and the side rod in this invention;

[0029] Figure 3 This is a schematic diagram of the connection structure between the fixing rod and the sampling container in this invention;

[0030] Figure 4 This is a schematic diagram of the sampling container in this invention;

[0031] Figure 5 This is a schematic diagram of the clamping mechanism in this invention;

[0032] Figure 6 This is a schematic diagram of the limiting mechanism in this invention.

[0033] Reference numerals: 1. Buoy; 2. Sampling container; 3. Lifting rod; 4. Side rod; 5. Extension rod; 6. Fixing rod; 7. Vertical slot; 8. Cover plate; 9. Horizontal slot; 10. Short rod; 11. Vertical pole; 12. Horizontal bar; 13. Connecting rod; 14. Fixing block; 15. Fixing hole; 16. Counterweight; 17. Handle; 18. Through hole; 19. Fixing bolt; 20. First limiting ring; 21. Second limiting ring 22. Rubber plug; 23. Locking rod; 24. Locking hole; 25. Locking seat; 26. Locking groove; 27. Push rod; 28. First rack; 29. ​​Central gear; 30. Second rack; 31. Insert rod; 32. Inserting hole; 33. Short groove; 34. Long rod; 35. Slider; 36. Top plate; 37. Push rod; 38. Insert block; 40. Swing rod; 41. Motion groove; 42. Limiting groove; 43. Central rod. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0035] like Figure 1 - Figure 6As shown, a water environment monitoring sampling device of this embodiment includes a buoy 1 and two sampling tanks 2. A lifting rod 3 is provided on the side wall of the buoy 1, and a fixing bolt 19 is provided in the through hole 18. The other end of the fixing bolt 19 is threaded to the side wall of the buoy 1. Two side rods 4 are fixedly connected to the side wall of the lifting rod 3. Three counterweights 16 are fixedly provided on the side wall of the buoy 1. The three counterweights 16 and the lifting rod 3 are located at the four positions of the buoy 1. The weight of each counterweight 16 is the same as the weight of the lifting rod 3 plus the side rods 4. The counterweights 16 and the lifting rod 3 can balance the weight around the buoy 1, ensuring that the buoy 1 will not tip over due to imbalance when facing wind and waves. The counterweights 16 and the lifting rod 3 can also increase the weight of the buoy 1, so that the center of gravity of the buoy 1 is lowered and it is less likely to tip over.

[0036] Reference Figure 2 and Figure 3 A handle 17 is fixedly connected to the top wall of the lifting rod 3. The handle 17 is provided with anti-slip texture to facilitate the lifting rod 3. A through hole 18 is opened on the side wall of the lifting rod 3. A first limiting ring 20 is fixedly connected to the end of the side rod 4 away from the lifting rod 3. A second limiting ring 21 is also fixedly connected to the side wall of the side rod 4. The diameters of the first limiting ring 20 and the second limiting ring 21 are the same. The side wall of the second limiting ring 21 facing away from the lifting rod 3 abuts against the side wall of the fixing block 14. The side rod 4 passing through the fixing hole 15 can move axially in the fixing hole 15. In order to ensure that the staff can pull the sampling container 2 laterally, the first limiting ring 20 and the second limiting ring 21 need to be set on the side rod 4. When the fixing block 14 contacts the first limiting ring 20 or the second limiting ring 21, it can drive the sampling container 2 to move laterally together.

[0037] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5 The bottom wall of the buoy 1 is fixedly connected to two extension rods 5. The two extension rods 5 are fixedly connected to two sets of upper and lower fixed rods 6 respectively. Each set of fixed rods 6 is fixedly connected to the side wall of the two extension rods 5. The two sampling tanks 2 have vertical grooves 7 on their side walls respectively. The two fixed rods 6 are slidably connected to the inner wall of the two vertical grooves 7 respectively. The sampling tank 2 is designed with open ends. The open ends of the sampling tank 2 allow water in the water area to flow freely in the sampling tank 2. The two ends of the sampling tank 2 are rotatably connected to the cover plates 8 respectively.

[0038] A rubber stopper 22 is fixedly installed on the side wall of the cover plate 8 facing the opening of the sampling tank 2. The size of the rubber stopper 22 is the same as the size of the opening of the sampling tank 2. When the cover plate 8 is fastened on the opening of the sampling tank 2, the rubber stopper 22 can block the opening end of the sampling tank 2. The deformable rubber stopper 22 seals both ends of the sampling tank 2 to ensure the purity of the obtained water sample. A locking rod 23 is also fixedly connected to the side wall of the cover plate 8 facing the sampling tank 2. The side wall of the locking rod 23 has a locking hole 24. The top walls of the two opening ends of the sampling tank 2 are fixedly connected to the locking seats 25 respectively. The side wall of the locking seat 25 facing the cover plate 8 has a locking groove 26. The end of the locking groove 26 facing the locking rod 23 is open. Therefore, when it is flipped upward with the cover plate 8, the locking rod 23 can be inserted into the locking groove 26.

[0039] Reference Figure 5 The card holder 25 is provided with two symmetrical clamping mechanisms for limiting the position of the clamping rod 23. The clamping mechanism includes a push rod 27, a first rack 28, a central gear 29, a second rack 30, and an insert rod 31. The card holder 25 has two working chambers, which are located on both sides of the card slot 26. One end of the push rod 27 passes through the side wall of the card slot 26. The end of the clamping rod 23 away from the cover plate 8 is arc-shaped. The opposite ends of the two push rods 27 are also arc-shaped. The other end of the push rod 27 is fixedly connected to the first rack 28. The first rack 28 is slidably connected to the bottom wall of the working chamber. The central gear 29 is rotatably connected to the bottom wall of the working chamber. The second rack 30 is slidably connected to the bottom wall of the working chamber. The central gear 29 is located between the first rack 28 and the second rack 30. The first rack 28 meshes with the second rack 30 on the other side. The insertion rod 31 is fixedly connected to the side wall of the second rack 30 facing the slot 26. The side wall of the slot 26 has an insertion hole 32. The position of the insertion hole 32 corresponds to the position of the insertion rod 31. The inner diameter of the insertion hole 32 is the same as the outer diameter of the insertion rod 31. The size of the insertion rod 31 is the same as the inner diameter of the slot 24. When the cover plate 8 is flipped up, the rubber stopper 22 blocks the opening of the sampling container 2. At the same time, the slot rod 23 on the side wall of the cover plate 8 will be inserted into the slot 26, so that the push rod 27 drives the first rack 28 to move. Under the drive of the central gear 29, the second rack 30 will drive the insertion rod 31 to pass through the insertion hole 32. The insertion rod 31 is inserted into the slot 24 on the side wall of the slot rod 23, which can fix the position of the slot rod 23 and the cover plate 8.

[0040] Two card holders 25 each have a short groove 33 on one side wall opposite to each other. The short groove 33 is connected to the working cavity. A long rod 34 is slidably connected in the short groove 33. The two ends of the long rod 34 are fixedly connected to the side wall of the first rack 28 in the two card holders 25 respectively. When the first rack 28 is driven to move by the push rod 27, it can drive the long rod 34 to slide in the short groove 33.

[0041] The cover plate 8 has transverse grooves 9 on both sides of its sidewalls. A short rod 10 is slidably connected in the transverse groove 9. A vertical rod 11 is fixedly connected to the end of the short rod 10 away from the transverse groove 9. A crossbar 12 is fixedly connected between the two vertical rods 11. A connecting rod 13 is sleeved on the crossbar 12. A fixing block 14 is fixedly connected to the top of the connecting rod 13. A fixing hole 15 is opened on the sidewall of the fixing block 14. The two side rods 4 pass through the fixing holes 15 on the sidewalls of the two fixing blocks 14 respectively. The inner diameter of the fixing hole 15 is slightly larger than the outer diameter of the side rod 4. Therefore, the side rod 4 can move axially in the fixing hole 15. The sampling tank 2 has a limiting mechanism on both sides of its sidewalls to limit the position of the fixing rod 6.

[0042] Reference Figure 6 The limiting mechanism includes a slider 35, a top plate 36, a push rod 37, two insert blocks 38, and two swing rods 40. A motion groove 41 is formed on the top wall of the sampling tank 2. The slider 35 is slidably connected to the inner wall of the motion groove 41. The bottom wall of the top plate 36 is fixedly connected to the top wall of the slider 35. The side wall of the top plate 36 is fixedly connected to the side wall of the long rod 34. The side wall of the push rod 37 is fixedly connected to the side wall of the top plate 36 away from the long rod 34. The push rod 37 is inverted "U" shaped. Two insert blocks 38 are fixedly connected to both ends of the push rod 37. Two central rods 43 are fixedly installed on the side wall of the sampling tank 2. The two central rods 43 are located on both sides of the vertical groove 7. 3. Passing through the side wall of the swing rod 40, the swing rod 40 rotates around the central rod 43. The swing rod 40 is "L" shaped. A limiting groove 42 is opened on the side wall of one end of the swing rod 40. The insert 38 is inserted into the limiting groove 42. The top wall of the other end of the swing rod 40 abuts against the bottom wall of the fixed rod 6. The long rod 34 moving along the short groove 33 will drive the top plate 36 to move together. The slider 35 moving along the motion groove 41 will, together with the top plate 36, take the insert 38 away from the swing rod 40. Without the restriction of the insert 38, the swing rod 40 can rotate freely, thereby releasing the restriction that originally abutted the bottom of the fixed rod 6. The sampling tank 2 can then detach from the fixed rod 6.

[0043] The working principle of this embodiment is as follows: When the staff needs to take down the sampling container 2, they need to first remove the fixing bolt 19 from the lifting rod 3. Then the staff can hold the handle 17 and lift the lifting rod 3 upward. The side rod 4 fixed to the side wall of the lifting rod 3 will drive the fixing block 14 to move upward.

[0044] Since the fixing block 14 is fixed on the connecting rod 13, when the connecting rod 13 moves upward, it will drive the crossbar 12 to move upward together. The upright rods 11 fixed at both ends of the crossbar 12 will drive the short rod 10 to move upward together, which will in turn drive the short rod 10 to flip the cover plate 8 upward. The movement of the short rod 10 in the transverse groove 9 will cause the cover plate 8 to gradually close to the opening end of the sampling tank 2. The rubber stopper 22 will block both ends of the sampling tank 2, which is convenient for preserving water samples.

[0045] As the cover plate 8 is gradually closed, the sampling container 2 will not be lifted upwards because the bottom of the fixing rod 6 is restricted by the swing rod 40.

[0046] When the cover plate 8 is fully fastened to the opening of the sampling container 2, the locking rod 23 on the side wall of the cover plate 8 will move into the slot 26 on the side wall of the locking seat 25. The locking rod 23 will press the push rod 27 into the working chamber. The first rack 28, which is fixedly connected to the push rod 27, will drive the central gear 29 to rotate. The second rack 30, which meshes with the central gear 29, will drive the insertion rod 31 to be inserted into the locking hole 24 on the side wall of the locking rod 23, so that the locking rod 23 and the cover plate 8 can be firmly fixed in the closed state.

[0047] When the first rack 28 is driven to move by the push rod 27, the long rod 34 on the side wall of the first rack 28 will drive the top plate 36 to move together towards the extension rod 5. The push rod 37 fixed at one end of the top will drive the insert block 38 to leave the limiting groove 42 at the top of the swing rod 40. The swing rod 40, which is no longer limited by the insert block 38, can rotate freely. At this time, if the lifting rod 3 is lifted upward, the sampling tank 2 can be driven to move upward, so that the fixing rod 6 leaves the sampling tank 2 along the vertical groove 7. Then the staff can take out the two sampling tanks 2 from underwater.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A sampling device for water environment monitoring, comprising a buoy (1) and two sampling tanks (2), characterized in that: The buoy (1) is provided with a lifting rod (3) on its side wall. Two side rods (4) are fixedly connected to the side wall of the lifting rod (3). Two extension rods (5) are fixedly connected to the bottom wall of the buoy (1). Two sets of fixing rods (6) are fixedly connected between the two extension rods (5). Each set of fixing rods (6) is fixedly connected to the side wall of the two extension rods (5). Vertical grooves (7) are opened on the side walls of the two sampling tanks (2). The two fixing rods (6) are slidably connected to the inner walls of the two vertical grooves (7). The sampling tank (2) is designed to be open at both ends. Cover plates (8) are rotatably connected to both ends of the sampling tank (2). A transverse groove (9) is provided on each of the two side walls. A short rod (10) is slidably connected in the transverse groove (9). A vertical rod (11) is fixedly connected to the end of the short rod (10) away from the transverse groove (9). A horizontal bar (12) is fixedly connected between the two vertical rods (11). A connecting rod (13) is sleeved on the horizontal bar (12). A fixing block (14) is fixedly connected to the top of the connecting rod (13). A fixing hole (15) is provided on the side wall of the fixing block (14). The two side rods (4) pass through the fixing holes (15) on the side walls of the two fixing blocks (14). A limiting mechanism for limiting the position of the fixing rod (6) is provided on each of the two side walls of the sampling tank (2).

2. The sampling device for water environment monitoring according to claim 1, characterized in that, The buoy (1) has three counterweights (16) fixedly installed on its side wall. The three counterweights (16) and the lifting rod (3) are located at the four positions of the buoy (1). The weight of each counterweight (16) is the same as the weight of the lifting rod (3) plus the side rod (4).

3. The sampling device for water environment monitoring according to claim 1, characterized in that, A handle (17) is fixedly connected to the top wall of the lifting rod (3). A through hole (18) is opened on the side wall of the lifting rod (3). A fixing bolt (19) is provided in the through hole (18). The other end of the fixing bolt (19) is threadedly connected to the side wall of the buoy (1).

4. The sampling device for water environment monitoring according to claim 1, characterized in that, The side rod (4) is fixedly connected to a first limiting ring (20) at the end away from the lifting rod (3), and the side wall of the side rod (4) is also fixedly connected to a second limiting ring (21). The diameters of the first limiting ring (20) and the second limiting ring (21) are the same, and the side wall of the second limiting ring (21) facing away from the lifting rod (3) abuts against the side wall of the fixing block (14).

5. The sampling device for water environment monitoring according to claim 1, characterized in that, A rubber stopper (22) is fixedly installed on the side wall of the cover plate (8) facing the opening of the sampling tank (2). The size of the rubber stopper (22) is the same as the size of the opening of the sampling tank (2). A clamping rod (23) is also fixedly connected to the side wall of the cover plate (8) facing the sampling tank (2). A clamping hole (24) is opened on the side wall of the clamping rod (23). A clamping seat (25) is fixedly connected to the top wall of the two opening ends of the sampling tank (2). A clamping groove (26) is opened on the side wall of the clamping seat (25) facing the cover plate (8). Two symmetrical clamping mechanisms for limiting the position of the clamping rod (23) are provided in the clamping seat (25).

6. The sampling device for water environment monitoring according to claim 5, characterized in that, The clamping mechanism includes a push rod (27), a first rack (28), a central gear (29), a second rack (30), and a insertion rod (31). The clamping seat (25) has two working chambers located on either side of the clamping slot (26). One end of the push rod (27) passes through the side wall of the clamping slot (26), and the other end is fixedly connected to the first rack (28). The first rack (28) is slidably connected to the bottom wall of the working chamber. The central gear (29) is rotatably connected to the bottom wall of the working chamber. The second rack (30) is slidably connected to the bottom wall of the working chamber. The central gear (29) is located between the first rack (28) and the second rack (30). One side of the central gear (29) meshes with the first rack (28), and the other side meshes with the second rack (30). The insert rod (31) is fixedly connected to the side wall of the second rack (30) facing the slot (26). The side wall of the slot (26) is provided with an insertion hole (32). The position of the insertion hole (32) corresponds to the position of the insert rod (31). The inner diameter of the insertion hole (32) is the same as the outer diameter of the insert rod (31). The size of the insert rod (31) is the same as the inner diameter of the slot (24).

7. The sampling device for water environment monitoring according to claim 6, characterized in that, The two card holders (25) have short grooves (33) on their opposite side walls. The short grooves (33) are connected to the working cavity. A long rod (34) is slidably connected in the short grooves (33). The two ends of the long rod (34) are fixedly connected to the side walls of the first rack (28) in the two card holders (25).

8. The sampling device for water environment monitoring according to claim 7, characterized in that, The limiting mechanism includes a slider (35), a top plate (36), a push rod (37), two inserts (38), and two swing rods (40). The top wall of the sampling container (2) has a motion groove (41). The slider (35) is slidably connected to the inner wall of the motion groove (41). The bottom wall of the top plate (36) is fixedly connected to the top wall of the slider (35). The side wall of the top plate (36) is fixedly connected to the side wall of the long rod (34). The side wall of the push rod (37) is fixedly connected to the side wall of the top plate (36) away from the long rod (34). The push rod (37) is inverted "U" shaped. The insert (38) is fixedly connected to both ends of the push rod (37). Two central rods (43) are fixedly installed on the side wall of the sampling tank (2). The two central rods (43) are located on both sides of the vertical groove (7). The central rod (43) passes through the side wall of the swing rod (40). The swing rod (40) rotates around the central rod (43). The swing rod (40) is "L" shaped. A limiting groove (42) is opened on the side wall of one end of the swing rod (40). The insert (38) is inserted into the limiting groove (42). The top wall of the other end of the swing rod (40) abuts against the bottom wall of the fixed rod (6).

9. The sampling device for water environment monitoring according to claim 6, characterized in that, The end of the lever (23) away from the cover plate (8) is arc-shaped, and the opposite ends of the two top rods (27) are also arc-shaped.

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