A sampling device and method for water quality detection

Abstract

The present invention discloses a sampling device and method for water quality detection, which relates to the technical field of sampling. It includes a floating block, a rectangular guide rod is installed at the bottom of the floating block, an intermittent extraction member is arranged on one side of the L-shaped mounting frame, and a distance-setting blocking member connected to the floating block is arranged on the side of the L-shaped mounting frame away from the first positioning ring. By setting the intermittent extraction member and the distance-setting blocking member, the second telescopic cylinder is started by the controller. When the second telescopic cylinder extends, the worm drives the worm gear to rotate 120 degrees. During this process, the cam squeezes the extrusion connecting pin through the protruding part, so as to make the aqueous solution enter the sampling cylinder. When the second telescopic cylinder contracts, the straight-tooth ring will rotate relative to the ratchet wheel, so that when the second telescopic cylinder extends and contracts once, the cam rotates 120 degrees clockwise. Cooperating with the distance-setting blocking member, the aqueous solution at different depths can be extracted, thereby expanding the sampling range of the device and improving the sampling efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling, and specifically to a sampling device and method for water quality detection. Background Art

[0002] The state of water quality in fields such as large lakes, aquaculture ponds, ornamental fish ponds, and industrial cooling water is of great significance for their uses; the water quality conditions of surface waters such as rivers, lakes, and reservoirs are crucial for the quality of human production and life. Currently, the technical means for water quality detection are mainly based on on-site sampling by sampling personnel, storing under certain conditions, and transporting to a laboratory for testing.

[0003] Generally, when sampling surface waters such as rivers, lakes, and reservoirs, the sampling equipment needs to be placed at the edge of the river to extract water. However, since the edges of rivers, lakes, etc. are relatively shallow, there are certain limitations when extracting and detecting the water at this location. When sampling the aqueous solution in the middle of the river, since it is necessary to detect the aqueous solutions at different depths, the staff needs to repeatedly operate the sampling equipment at this time. This not only increases the labor intensity of the staff but also reduces the sampling efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a sampling device and method for water quality detection to solve the problem of low sampling efficiency.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A sampling device for water quality detection includes a floating block. A rectangular guide rod is installed at the bottom of the floating block. A limit frame is sleeved on the rectangular guide rod. A first positioning ring is installed on the outer side of the limit frame. An L-shaped mounting frame is installed on the outer wall of the first positioning ring. An intermittent extraction member is arranged on one side of the L-shaped mounting frame. A distance-setting barrier member connected to the floating block is arranged on the side of the L-shaped mounting frame away from the first positioning ring. A power supply is installed on the top of the floating block. One side of the power supply is connected to a traction rope. One end of the traction rope is installed with a controller. A sampling cylinder is installed at the bottom of the first positioning ring.

[0006] As a further solution of the present invention: The intermittent extraction member includes a second positioning ring installed at the top of the limit frame. The outer wall of the second positioning ring is rotatably connected to a cam through a bearing. One end of the L-shaped mounting frame close to the center of the second positioning ring is installed with a worm. A worm gear meshing with the worm is arranged at the top of the cam. One end of the worm is rotatably connected to an opening sleeve through a bearing. A straight tooth ring is installed on the outer wall of the opening sleeve. A ratchet is installed at one end of the worm and located inside the opening sleeve. The inner wall of the opening sleeve is rotatably connected to a pawl through a rotating shaft. A torsion spring is clamped to the connection between the pawl and the opening sleeve through a card slot. A large transmission straight gear meshing with the straight tooth ring is installed on one side of the L-shaped mounting frame. A small transmission straight gear is installed on the side of the large transmission straight gear away from the L-shaped mounting frame. A second telescopic cylinder is arranged on one side of the L-shaped mounting frame. The output end of the second telescopic cylinder is connected to a straight rack meshing with the small transmission straight gear. A guiding slide rail is installed on the outer wall of the first positioning ring. A movable slider is slidably connected to the inside of the guiding slide rail. An extrusion connecting pin located above the first positioning ring is arranged on one side of the movable slider. A piston rod extending into the sampling cylinder is arranged at the bottom of the movable slider.

[0007] As a further solution of the present invention: The center of the second positioning ring is coaxial with the center of the worm gear. A through hole penetrating from the top to the bottom of the worm gear is opened at the top of the worm gear.

[0008] As a further solution of the present invention: The diameter of the large transmission straight gear is larger than that of the small transmission straight gear. The center of the large transmission straight gear is coaxial with the center of the small transmission straight gear.

[0009] As a further solution of the present invention: The fixed-distance blocking member includes a measuring rod installed on the side of the L-shaped mounting frame away from the first positioning ring. A blocking block is sleeved on the measuring rod. A locking bolt is installed on the side of the blocking block away from the rectangular guide rod. A first telescopic cylinder located above the power supply is installed on the top of the floating block. The output end of the first telescopic cylinder is connected to an L-shaped connecting plate. A receiving groove located below the L-shaped connecting plate is opened at the top of the floating block. A connecting bin is installed at the bottom of one end of the L-shaped connecting plate. A positioning plate is installed on the inner wall of the connecting bin. A second contact piece is installed on the top of the positioning plate. A pin extending to the outside of the connecting bin is inserted into the connecting bin. A movable plate located inside the connecting bin is installed at the bottom of the pin. A first contact piece is arranged at the bottom of the movable plate. A telescopic spring connected to the inner wall of the connecting bin is installed at the bottom of the movable plate and located inside the first contact piece. A warning light is installed on the top of the power supply.

[0010] As a further solution of the present invention: The first contact piece is electrically connected to the power supply through a wire. The second contact piece is electrically connected to the warning light through a wire.

[0011] As a further solution of the present invention: a ball is rotatably connected to the top of the snap pin through a rotating shaft.

[0012] As a further solution of the present invention: the number of the barrier blocks and the number of the sampling cylinders are both three. The three barrier blocks are vertically arranged along the vertical central axis of the measuring rod, and the three sampling cylinders are arranged equidistantly along the center of the first positioning ring.

[0013] As a further solution of the present invention: a counterweight block is arranged at the bottom of the first positioning ring and is staggered with the sampling cylinder. When the cam is in the initial state, it is located between two adjacent sampling cylinders.

[0014] The present invention also discloses a sampling method for water quality detection, which uses the above-mentioned sampling device for water quality detection and includes the following steps:

[0015] S1: First, operate the distance-setting barrier according to the sampling depth, then put the floating block into a river or a lake, and hold the controller to connect the controller and the floating block through the traction of the traction rope;

[0016] S2: The first positioning ring falls under the action of its own gravity. During this process, the first positioning ring is restricted by the distance-setting barrier, so that the first positioning ring stops moving down after falling to a certain depth. At this time, operate the intermittent extraction part to extract the aqueous solution;

[0017] S3: Then operate the distance-setting barrier to make the first positioning ring lose the restriction and continue to move down. After falling to a certain depth, restrict the first positioning ring again, and then operate the intermittent extraction part to extract the aqueous solution at other depths;

[0018] S4: By repeatedly operating the distance-setting barrier and the intermittent extraction part, the aqueous solutions at three different depths can be pumped into the sampling cylinder;

[0019] S5: After the extraction is completed, drag the floating block to the shore by pulling the traction rope, and then take out the aqueous solutions inside the different sampling cylinders for detection.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. By setting an intermittent extraction part and a fixed-distance blocking part, the second telescopic cylinder is started by the controller, causing the second telescopic cylinder to perform one expansion and contraction. When the second telescopic cylinder extends, the worm drives the worm gear to rotate 120 degrees. During this process, the cam squeezes the extrusion connecting pin through the raised part, so that the aqueous solution enters the sampling cylinder. When the second telescopic cylinder contracts, the straight-tooth ring rotates relative to the ratchet, so that the worm rotates in one direction, causing the cam to rotate 120 degrees clockwise when the second telescopic cylinder performs one expansion and contraction. Cooperating with the fixed-distance blocking part, the aqueous solution at different depths can be extracted, thereby improving the sampling range of the equipment and the sampling efficiency;

[0022] 2. By setting a fixed-distance blocking part, first adjust the position of the blocking block relative to the measuring rod according to the sampling depth, and then turn the locking bolt to realize the fixed connection between the blocking block and the measuring rod. When the first positioning ring falls along the rectangular guide rod, the pin moves downward relative to the connecting bin due to the extrusion of the blocking block, so that the warning light is powered on and lit. At this time, the staff operates the second telescopic cylinder to perform one expansion and contraction through the controller, and the aqueous solution at this depth can be extracted at this time. Then, by operating the controller, the first telescopic cylinder performs one expansion and contraction, and the bottom of the blocking block loses the shield and continues to fall with the first positioning ring. Then, when the first telescopic cylinder extends, the L-shaped connecting plate shields the next blocking block, and so on, the aqueous solution at a specific depth can be extracted. The operation is simple, and the accuracy of extracting the aqueous solution at a specific depth is improved. Description of the Drawings

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a connection schematic diagram of the L-shaped connecting plate and the blocking block of the present invention;

[0025] Figure 3 It is a schematic diagram of the internal structure of the connecting bin of the present invention;

[0026] Figure 4 It is a connection schematic diagram of the first positioning ring and the cam of the present invention;

[0027] Figure 5 It is a connection schematic diagram of the cam and the worm of the present invention;

[0028] Figure 6 It is a connection schematic diagram of the worm and the open-ended sleeve of the present invention;

[0029] Figure 7 It is a connection schematic diagram of the open-ended sleeve and the pawl of the present invention;

[0030] Figure 8 It is a connection schematic diagram of the guide rail and the movable slider of the present invention.

[0031] In the figure: 1. floating block; 2. rectangular guide rod; 3. towing rope; 4. first positioning ring; 5. guiding slide rail; 6. counterweight block; 7. L-shaped connecting plate; 8. locking bolt; 9. blocking block; 10. measuring rod; 11. warning light; 12. power supply; 13. controller; 14. pin; 15. first telescopic cylinder; 16. storage groove; 17. connecting bin; 18. movable plate; 19. first contact piece; 20. second contact piece; 21. positioning plate; 22. telescopic spring; 23. second telescopic cylinder; 24. straight rack; 25. large transmission spur gear; 26. small transmission spur gear; 27. second positioning ring; 28. limiting frame; 29. piston rod; 30. movable slider; 31. extrusion connecting pin; 32. cam; 33. worm gear; 34. worm; 35. L-shaped mounting bracket; 36. ratchet; 37. open casing; 38. straight tooth ring; 39. pawl; 40. torsion spring; 41. sampling cylinder. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", and "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. The embodiments of the present invention will be described below according to the overall structure of the present invention.

[0034] As Figures 1 to 8As shown in the figure, in an embodiment of the present invention, a sampling device for water quality detection includes a floating block 1. A rectangular guide rod 2 is installed at the bottom of the floating block 1. A limit frame 28 is sleeved on the rectangular guide rod 2. A first positioning ring 4 is installed on the outer side of the limit frame 28. An L-shaped mounting frame 35 is installed on the outer wall of the first positioning ring 4. An intermittent extraction member is arranged on one side of the L-shaped mounting frame 35. A fixed-distance blocking member connected to the floating block 1 is arranged on the side of the L-shaped mounting frame 35 away from the first positioning ring 4. A power supply 12 is installed on the top of the floating block 1. One side of the power supply 12 is connected to a traction rope 3. One end of the traction rope 3 is installed with a controller 13. A sampling cylinder 41 is installed at the bottom of the first positioning ring 4.

[0035] In this embodiment: First, operate the fixed-distance blocking member according to the sampling depth. Then, place the floating block 1 into a river or a lake, and hold the controller 13. Through the traction of the traction rope 3, the connection between the controller 13 and the floating block 1 is realized. Under the action of the self-gravity of the first positioning ring 4, it falls. During this process, the first positioning ring 4 is restricted by the fixed-distance blocking member, so that the first positioning ring 4 stops moving down after falling to a certain depth. At this time, operate the intermittent extraction member to extract the aqueous solution. Then, operate the fixed-distance blocking member to make the first positioning ring 4 lose its restriction and continue to move down. After falling to a certain depth, restrict the first positioning ring 4 again. Then, operate the intermittent extraction member to extract the aqueous solution at other depths. Repeating this way, the aqueous solutions at three different depths can be pumped into the sampling cylinder 41. After the extraction is completed, drag the floating block 1 to the shore by pulling the traction rope 3. Subsequently, take out the aqueous solutions inside different sampling cylinders 41 for detection.

[0036] Such as Figure 1 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8As shown in the figure, the intermittent extraction part includes a second positioning ring 27 installed on the top of the limit frame 28. The outer side wall of the second positioning ring 27 is rotatably connected with a cam 32 through a bearing. One end of the L-shaped mounting frame 35 close to the center of the second positioning ring 27 is installed with a worm 34. A worm gear 33 meshing with the worm 34 is arranged on the top of the cam 32. One end of the worm 34 is rotatably connected with an open sleeve 37 through a bearing. A straight tooth ring 38 is installed on the outer wall of the open sleeve 37. A ratchet 36 located inside the open sleeve 37 is installed at one end of the worm 34. A pawl 39 is rotatably connected to the inner wall of the open sleeve 37 through a rotating shaft. A torsion spring 40 is clamped to the connection between the pawl 39 and the open sleeve 37 through a card slot. A large transmission spur gear 25 meshing with the straight tooth ring 38 is installed on one side of the L-shaped mounting frame 35. A small transmission spur gear 26 is installed on the side of the large transmission spur gear 25 away from the L-shaped mounting frame 35. A second telescopic cylinder 23 is arranged on one side of the L-shaped mounting frame 35. The output end of the second telescopic cylinder 23 is connected with a straight rack 24 meshing with the small transmission spur gear 26. A guiding slide rail 5 is installed on the outer wall of the first positioning ring 4. A movable slider 30 is slidably connected inside the guiding slide rail 5. An extrusion connecting pin 31 located above the first positioning ring 4 is arranged on one side of the movable slider 30. A piston rod 29 extending into the sampling cylinder 41 is arranged at the bottom of the movable slider 30.

[0037] In this embodiment: The second telescopic cylinder 23 is started through the controller 13, so that the second telescopic cylinder 23 makes one telescopic movement. When the second telescopic cylinder 23 extends, the straight tooth ring 38 is driven to rotate through the straight rack 24 and the small transmission spur gear 26. At this time, the straight tooth ring 38 will drive the ratchet 36 to rotate through the pawl 39, so as to make the worm 34 drive the worm gear 33 to rotate by 120 degrees. During this process, the cam 32 squeezes the extrusion connecting pin 31 through the convex part. At this time, the movable slider 30 moves in a direction away from the center of the first positioning ring 4. During this process, the piston rod 29 will move inside the sampling cylinder 41, so as to make the aqueous solution enter the sampling cylinder 41. When the second telescopic cylinder 23 contracts, the ratchet 36 cannot limit the pawl 39. At this time, the straight tooth ring 38 will rotate relative to the ratchet 36, so as to make the worm 34 rotate in one direction, so that the cam 32 rotates clockwise by 120 degrees when the second telescopic cylinder 23 makes one telescopic movement. Cooperating with the fixed-distance blocking part, the aqueous solution at different depths can be extracted, so as to improve the sampling range of the equipment and improve the sampling efficiency.

[0038] As Figure 2 , Figure 5 shown in the figure, the center of the second positioning ring 27 is coaxial with the center of the worm gear 33. A through hole penetrating from the top to the bottom of the worm gear 33 is opened on the top of the worm gear 33.

[0039] In this embodiment, by setting this structure, it is possible to prevent the worm wheel 33 from obstructing the rectangular guide rod 2, and at the same time ensure that the cam 32 rotates along the center of the first positioning ring 4.

[0040] As Figure 5 shown, the diameter of the large transmission spur gear 25 is larger than that of the small transmission spur gear 26, and the centers of the large transmission spur gear 25 and the small transmission spur gear 26 are coaxial.

[0041] In this embodiment, by setting this structure, when the second telescopic cylinder 23 extends, the large transmission spur gear 25 rotates concentrically with the small transmission spur gear 26, so as to increase the number of rotations of the straight tooth ring 38 when the small transmission spur gear 26 rotates one circle.

[0042] As Figures 1 to 4 shown, the fixed-distance barrier includes a measuring rod 10 installed on the side of the L-shaped mounting bracket 35 away from the first positioning ring 4. A barrier block 9 is sleeved on the measuring rod 10. A locking bolt 8 is installed on the side of the barrier block 9 away from the rectangular guide rod 2. The top of the floating block 1 is provided with a first telescopic cylinder 15 located above the power supply 12. The output end of the first telescopic cylinder 15 is connected to an L-shaped connecting plate 7. A receiving groove 16 is formed at the top of the floating block 1 below the L-shaped connecting plate 7. One end of the bottom of the L-shaped connecting plate 7 is provided with a connecting chamber 17. A positioning plate 21 is installed on the inner wall of the connecting chamber 17. A second contact piece 20 is installed on the top of the positioning plate 21. A pin 14 extending to the outside of the connecting chamber 17 is inserted into the connecting chamber 17. The bottom of the pin 14 is provided with a movable plate 18 located inside the connecting chamber 17. A first contact piece 19 is arranged at the bottom of the movable plate 18. A telescopic spring 22 is installed at the bottom of the movable plate 18 inside the first contact piece 19 and connected to the inner wall of the connecting chamber 17. A warning lamp 11 is installed on the top of the power supply 12.

[0043] In this embodiment: First, adjust the position of the barrier block 9 relative to the measuring rod 10 according to the sampling depth, and then turn the locking bolt 8 to achieve the fixed connection between the barrier block 9 and the measuring rod 10. When the first positioning ring 4 falls along the rectangular guide rod 2, the barrier block 9 will contact the L-shaped connecting plate 7 as the first positioning ring 4 falls. At this time, the pin 14 moves downward relative to the connecting bin 17 due to the extrusion of the barrier block 9, so that the first contact piece 19 contacts the second contact piece 20. When the first contact piece 19 contacts the second contact piece 20, the warning light 11 is powered on and lights up. At this time, the staff operates the second telescopic cylinder 23 to perform a telescopic movement through the controller 13, and the aqueous solution at this depth can be extracted. Then, by operating the controller 13, the first telescopic cylinder 15 performs a telescopic movement. When the first telescopic cylinder 15 contracts, it drives the L-shaped connecting plate 7 to be misaligned with the barrier block 9. At this time, the bottom of the barrier block 9 loses its shielding and continues to fall with the first positioning ring 4. At the same time, the first contact piece 19 separates from the second contact piece 20 under the action of the elastic restoring force of the telescopic spring 22, so that the warning light 11 goes out. Then, the first telescopic cylinder 15 extends to make the L-shaped connecting plate 7 shield the next barrier block 9. Repeating this way can extract the aqueous solution at a specific depth. The operation is simple, and the accuracy of extracting the aqueous solution at a specific depth is improved.

[0044] As Figure 2 、 Figure 3 shown, the first contact piece 19 is electrically connected to the power supply 12 through a wire, and the second contact piece 20 is electrically connected to the warning light 11 through a wire.

[0045] In this embodiment: By setting this structure, the warning light 11 is powered on and operates when the first contact piece 19 contacts the second contact piece 20, so as to control the operation timing of the warning light 11.

[0046] As Figure 3 shown, a ball is rotatably connected to the top of the pin 14 through a rotating shaft.

[0047] In this embodiment: By setting this structure, the friction between the pin 14 and the barrier block 9 is reduced.

[0048] As Figure 1 、 Figure 4 、 Figure 8 shown, the number of the barrier blocks 9 and the number of the sampling cylinders 41 are both three. The three barrier blocks 9 are vertically arranged along the vertical central axis of the measuring rod 10, and the three sampling cylinders 41 are arranged equidistantly along the center of the first positioning ring 4.

[0049] In this embodiment: By setting this structure, the effect of sampling aqueous solutions at three different depths is achieved.

[0050] As Figure 8As shown, a counterweight block 6 staggered with the sampling tubes 41 is disposed at the bottom of the first positioning ring 4 , and the cam 32 is located between two adjacent sampling tubes 41 when in an initial state.

[0051] In this embodiment, the counterweight block 6 is provided to improve the smoothness of the downward movement of the first positioning ring 4 relative to the rectangular guide rod 2, and at the same time, it is prevented that the cam 32 blocks the restoration of the extruded connecting pin 31 after rotating one circle.

[0052] In combination with the above-mentioned sampling device for water quality detection, a sampling method for water quality detection is provided below, which specifically includes the following steps:

[0053] S1: First, adjust the position of the barrier block 9 relative to the measuring rod 10 according to the sampling depth, then turn the locking bolt 8 to achieve a fixed connection between the barrier block 9 and the measuring rod 10, then put the floating block 1 into the river or lake, and hold the controller 13, and connect the controller 13 with the floating block 1 by pulling the traction rope 3;

[0054] S2: When the first positioning ring 4 falls along the rectangular guide rod 2, the blocking block 9 will contact the L-shaped connecting plate 7 as the first positioning ring 4 falls. At this time, the bayonet 14 moves downward relative to the connecting compartment 17 due to the squeezing of the blocking block 9, so that the first contact piece 19 contacts the second contact piece 20. When the first contact piece 19 contacts the second contact piece 20, the warning light 11 is powered on and lights up, and the second telescopic cylinder 23 is started by the controller 13, so that the second telescopic cylinder 23 is extended and retracted once. When the second telescopic cylinder 23 is extended, the spur gear ring 38 is driven to rotate through the spur rack 24 and the small transmission spur gear 26. At this time, the spur gear ring 38 will drive the ratchet 36 to rotate through the pawl 39, so that the worm 34 drives the worm wheel 33 to rotate. One hundred and twenty degrees, during this process, the cam 32 squeezes the extrusion pin 31 through the protrusion, and the movable slider 30 moves in the direction away from the center of the first positioning ring 4. During this process, the piston rod 29 will move inside the sampling tube 41, so that the aqueous solution enters the sampling tube 41. When the second telescopic cylinder 23 contracts, the ratchet 36 cannot limit the pawl 39. At this time, the spur ring 38 will rotate relative to the ratchet 36, so that the worm 34 rotates unidirectionally, so that when the second telescopic cylinder 23 is extended and retracted once, the cam 32 rotates 120 degrees clockwise, and the fixed-distance barrier can be used to extract aqueous solutions of different depths, thereby increasing the sampling range of the equipment and improving the sampling efficiency;

[0055] S3: Then, operate the control controller 13 to make the first telescopic cylinder 15 extend and retract once. When the first telescopic cylinder 15 contracts, it drives the L-shaped connecting plate 7 to be misaligned with the blocking block 9. At this time, the bottom of the blocking block 9 loses its shelter and continues to fall with the first positioning ring 4. At the same time, the first contact piece 19 separates from the second contact piece 20 under the action of the elastic restoring force of the telescopic spring 22, so that the warning light 11 goes out. Then, the first telescopic cylinder 15 extends to make the L-shaped connecting plate 7 block the next blocking block 9;

[0056] S4: By repeatedly operating the first telescopic cylinder 15 and the second telescopic cylinder 23, aqueous solutions of three different depths can be pumped into the sampling cylinder 41;

[0057] S5: After the extraction is completed, drag the floating block 1 to the shore by pulling the towing rope 3, and then take out the aqueous solutions inside the different sampling cylinders 41 for testing.

[0058] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A sampling device for water quality detection, comprising a floating block (1), characterized in that, A rectangular guide rod (2) is installed at the bottom of the floating block (1), a limit frame (28) is sleeved on the rectangular guide rod (2), a first positioning ring (4) is installed on the outer side of the limit frame (28), an L-shaped mounting frame (35) is installed on the outer wall of the first positioning ring (4), an intermittent extraction member is arranged on one side of the L-shaped mounting frame (35), a distance barrier connected to the floating block (1) is arranged on the side of the L-shaped mounting frame (35) away from the first positioning ring (4), a power supply (12) is installed on the top of the floating block (1), a traction rope (3) is connected to one side of the power supply (12), a controller (13) is installed on one end of the traction rope (3), and a sampling tube (41) is installed at the bottom of the first positioning ring (4); The intermittent extraction member comprises a second positioning ring (27) mounted on the top of the limiting frame (28); the outer wall of the second positioning ring (27) is rotatably connected to a cam (32) via a bearing; a worm (34) is mounted on one end of the L-shaped mounting frame (35) close to the center of the second positioning ring (27); a worm wheel (33) meshing with the worm (34) is disposed on the top of the cam (32); one end of the worm (34) is rotatably connected to an open sleeve (37) via a bearing; a spur gear ring (38) is mounted on the outer wall of the open sleeve (37); one end of the worm (34) is rotatably connected to a ratchet (39) located inside the open sleeve (37); the inner wall of the open sleeve (37) is rotatably connected to a ratchet (39) via a rotating shaft; a torsion spring (36) is clamped at a connection between the ratchet (39) and the open sleeve (37) via a clamping groove. 40), a large transmission spur gear (25) meshing with a spur gear ring (38) is installed on one side of the L-shaped mounting frame (35), a small transmission spur gear (26) is installed on the side of the large transmission spur gear (25) away from the L-shaped mounting frame (35), a second telescopic cylinder (23) is provided on one side of the L-shaped mounting frame (35), an output end of the second telescopic cylinder (23) is connected to a spur rack (24) meshing with the small transmission spur gear (26), a guide rail (5) is installed on the outer wall of the first positioning ring (4), a movable slider (30) is slidably connected to the inner side of the guide rail (5), an extrusion connecting pin (31) located above the first positioning ring (4) is provided on one side of the movable slider (30), and a piston rod (29) extending to the inside of the sampling tube (41) is provided at the bottom of the movable slider (30).

2. The sampling device for water quality detection according to claim 1, characterized in that, The center of the second positioning ring (27) is coaxial with the center of the worm wheel (33), and a through hole is provided at the top of the worm wheel (33) and penetrates to the bottom of the worm wheel (33).

3. The sampling device for water quality detection according to claim 1, wherein, The diameter of the large transmission spur gear (25) is greater than the diameter of the small transmission spur gear (26), and the center of the circle of the large transmission spur gear (25) is coaxial with the center of the circle of the small transmission spur gear (26).

4. The sampling device for water quality detection according to claim 1, characterized in that, The fixed-distance barrier includes a measuring rod (10) installed on the side of the L-shaped mounting bracket (35) away from the first positioning ring (4). A barrier block (9) is sleeved on the measuring rod (10). A locking bolt (8) is installed on the side of the barrier block (9) away from the rectangular guide rod (2). On the top of the floating block (1), a first telescopic cylinder (15) is installed above the power supply (12). The output end of the first telescopic cylinder (15) is connected to an L-shaped connecting plate (7). A storage groove (16) is formed on the top of the floating block (1) below the L-shaped connecting plate (7). At the bottom of one end of the L-shaped connecting plate (7), a connecting bin (17) is installed. A positioning plate (21) is installed on the inner wall of the connecting bin (17). A second contact piece (20) is installed on the top of the positioning plate (21). A pin (14) extending outside the connecting bin (17) is inserted into the connecting bin (17). At the bottom of the pin (14), a movable plate (18) is installed inside the connecting bin (17). A first contact piece (19) is arranged at the bottom of the movable plate (18). A telescopic spring (22) is installed at the bottom of the movable plate (18) inside the first contact piece (19) and connected to the inner wall of the connecting bin (17). A warning lamp (11) is installed on the top of the power supply (12).

5. The sampling device for water quality detection according to claim 4, wherein, The first contact piece (19) is electrically connected to the power supply (12) through a wire, and the second contact piece (20) is electrically connected to the warning lamp (11) through a wire.

6. The sampling device for water quality detection according to claim 4, characterized in that, A ball is rotatably connected to the top of the pin (14) through a rotating shaft.

7. The sampling device for water quality detection according to claim 4, characterized in that, The number of the barrier blocks (9) and the number of the sampling cylinders (41) are both three. The three barrier blocks (9) are vertically arranged along the vertical central axis of the measuring rod (10), and the three sampling cylinders (41) are arranged equidistantly along the center of the first positioning ring (4).

8. The sampling device for water quality detection according to claim 4, wherein, A counterweight block (6) is arranged at the bottom of the first positioning ring (4) and is staggered with the sampling cylinder (41). When the cam (32) is in the initial state, it is located between two adjacent sampling cylinders (41).

9. A sampling method for water quality detection, characterized in that, Adopt a sampling device for water quality detection according to any one of claims 1-8, including the following steps: S1: First, operate the fixed-distance barrier according to the sampling depth. Then, put the floating block (1) into a river or a lake, hold the controller (13), and realize the connection between the controller (13) and the floating block (1) through the traction of the traction rope (3). S2: The first positioning ring (4) falls under its own gravity. During this process, the first positioning ring (4) is restricted by the fixed-distance barrier, so that the first positioning ring (4) stops moving down after falling to a certain depth. At this time, operate the intermittent extraction part to extract the aqueous solution. S3: Then, operate the fixed-distance barrier to make the first positioning ring (4) lose its restriction and continue to move down. When it falls to a certain depth, restrict the first positioning ring (4) again, and then operate the intermittent extraction part to extract the aqueous solution at other depths. S4: By repeatedly operating the fixed-distance barrier and the intermittent extraction part, the aqueous solutions at three different depths can be pumped into the sampling cylinder (41). S5: After the extraction is completed, drag the floating block (1) to the shore by pulling the towing rope (3), and then take out the aqueous solutions inside the different sampling cylinders (41) for testing.

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