Water sample collecting device for monitoring fishery environment

Abstract

The invention relates to a water sample collection device for fishery environment monitoring, which comprises a mobile carrier, a pull rope and a balancing weight, the mobile carrier is provided with a hoisting mechanism used for winding and unwinding the pull rope, the free end of the pull rope is provided with a cylinder with two open ends, the cylinder is internally and vertically provided with a sampling cylinder with two open ends, and the sampling cylinder is provided with a water inlet and a water outlet. The balancing weight is arranged at the lower end of the cylinder body, a force guide rod penetrating through the balancing weight is vertically and slidably connected to the central axis of the balancing weight, a bottom contact plate is arranged at the lower end of the force guide rod, and an upper soft sealing plug with the same length as the sampling cylinder is arranged at the upper end of the force guide rod; a lower soft sealing plug fixedly connected with the force guide rod is arranged below the upper soft sealing plug, and limiting plates are arranged at the upper end of the upper soft sealing plug and the lower end of the lower soft sealing plug respectively; according to the invention, the problem that the quality of a water sample collected by the sampling cylinder is affected due to the fact that muddy water is aroused when the balancing weight touches the bottom is effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of water sample collection, and in particular to a water sample collection device for fishery environment monitoring. Background Art

[0002] Fishery environment refers to the freshwater, seawater, natural or artificial water environment suitable for the normal habitat and reproduction of fishery organisms. In addition to fishery organisms, the forming elements also include other organisms living in the water, as well as substances suspended and dissolved in the water, the physical and chemical properties of water, the bottom topography and sediments, and the hydrological and meteorological conditions that affect the fishery water environment. According to the nature, it can be divided into abiotic environment (physical and chemical environment, topography, bottom quality and meteorological conditions) and biological environment (bait organisms, predators, commensal organisms and competitors, etc.). The fishery environment and fishery organisms interact and influence each other, which is related to the survival, development, growth, reproduction, death, recruitment, movement, distribution and the rise and fall of fishery organisms. Therefore, the study of fishery environment is an important content that cannot be ignored in exploring the development and utilization of fishery resources.

[0003] With the increase of population, accelerated industrialization and unreasonable fishing activities, the marine ecosystem is facing unprecedented pressure, and the problems of depletion of marine resources, loss of biodiversity and marine pollution are becoming increasingly serious. In this context, it is necessary to improve aquaculture efficiency, prevent diseases, optimize resource allocation, protect the ecological environment, promote biodiversity and provide new solutions for the sustainable development of fisheries through water quality monitoring in the fishery environment. Before water quality testing, it is necessary to sample different water layers in the aquatic environment. Bottom water generally refers to water about 2 meters deep from the riverbed. In the prior art, when sampling bottom water, a bucket water sampler is usually used. When it is used, a traction rope is tied at the upper end of the bucket water sampler, and a heavy hammer is hung at the lower end. The weight of the heavy hammer should ensure that the bucket water sampler has a certain sinking speed in the water and can eventually touch the seabed. The method for collecting bottom seawater is as follows: when the traction rope is long enough, first put the weight, water sampler, etc. into the water from the boat in turn, and then let the traction rope be released under the gravity of the weight and the water sampler until the weight touches the bottom (generally judged by whether the traction rope is completely relaxed on the water surface); then lift the water sampler by the traction rope. This method for collecting bottom seawater has the following disadvantages: after the weight touches the bottom, mud and debris are stirred up, which affects the quality of the collected water sample, especially when the riverbed is soft mud, when the weight touches the bottom, a large amount of muddy water will be stirred up, thereby affecting the quality of the collected water sample. Summary of the invention

[0004] The embodiment of the present invention provides a water sample collection device for fishery environment monitoring, which can solve the problem in the prior art that mud and debris are stirred up after the heavy hammer touches the bottom, thereby affecting the quality of the collected water samples.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a water sample collection device for fishery environment monitoring, comprising a mobile carrier, a pull rope and a counterweight block, the mobile carrier is provided with a winch mechanism for retracting and releasing the pull rope, the free end of the pull rope is provided with a cylinder with openings at both ends, a sampling cylinder with openings at both ends is vertically provided inside the cylinder, the counterweight block is arranged at the lower end of the cylinder, a force guide rod penetrating the counterweight block is vertically slidably connected at the center axis of the counterweight block, a bottom contact plate is provided at the lower end of the force guide rod, and the guide rod is provided with a bottom contact plate. An upper soft sealing plug with the same length as that of the sampling cylinder is arranged at the upper end of the force rod, and a lower soft sealing plug fixedly connected to the force guiding rod is arranged below the upper soft sealing plug, and limit plates are respectively arranged at the upper end of the upper soft sealing plug and the lower end of the lower soft sealing plug. When in use, the bottom plate contacts the riverbed, and the force guiding rod moves upward to drive the upper soft sealing plug and the lower soft sealing plug to move upward. After the water sample at the bottom of the water environment enters the sampling cylinder from the lower part of the sampling cylinder, the upper soft sealing plug and the lower soft sealing plug seal the two ends of the sampling cylinder respectively.

[0006] Preferably, a plurality of avoidance grooves are provided in a circular array at the lower end of the side wall of the cylinder, a sealing plate is provided above the avoidance groove, a guide cylinder for the force guiding rod to pass through is provided at the central axis of the sealing plate, a plurality of hinged rods passing through the corresponding avoidance grooves are hinged on the outer wall of the guide cylinder, a baffle cloth is provided on the hinged rod, a driving ring located below the sealing plate is provided on the force guiding rod, a plurality of connecting rods are hinged on the outer wall of the driving ring, and the other ends of the connecting rods are respectively hinged to the corresponding hinged rods.

[0007] Preferably, a negative pressure assembly is provided at the lower part of the counterweight block, and the negative pressure assembly includes a guide hole vertically penetrating the counterweight block, and a guide rod slidably connected to the guide hole is provided on the bottom contact plate.

[0008] Preferably, the negative pressure assembly further comprises a piston cavity coaxial with the guide hole, and a piston fixedly connected to the guide rod is slidably connected inside the piston cavity.

[0009] Preferably, the negative pressure assembly annular array is provided in multiple groups.

[0010] Preferably, a through hole for the force guiding rod to pass through is opened at the center axis of the counterweight block, a transmission cavity is opened on one side of the through hole, a gear is rotatably connected inside the transmission cavity, the force guiding rod is provided with teeth matching the gear, a non-return cavity is opened on one side of the transmission cavity, a slider is slidably connected inside the non-return cavity, an elastic member is arranged between the slider and the side wall of the non-return cavity, a non-return claw for preventing the gear from rotating in the opposite direction is arranged on the slider, a socket is opened on the side wall of the counterweight block, a "T"-shaped rod passing through the counterweight block is also arranged on the slider, and a plug rod inserted into the socket is arranged at the end of the "T"-shaped rod.

[0011] Preferably, a necking portion is provided at the opening of the insertion hole, and a limiting ring is provided on the insertion rod.

[0012] Preferably, the hoisting mechanism includes a "U"-shaped frame arranged on a mobile carrier, a winding roller is rotatably connected between the two side walls of the "U"-shaped frame, the pull rope is wound around the winding roller, and a driving part with an output end fixedly connected to the winding roller is provided on the side wall of the "U"-shaped frame.

[0013] Compared with the prior art, the present invention cooperates with a mobile carrier, a pull rope, a counterweight, a winch mechanism, a cylinder, a sampling cylinder, a guide rod, a bottom plate, an upper soft sealing plug, a lower soft sealing plug and a limit plate. In the initial state, the upper soft sealing plug is fully inserted into the sampling cylinder to seal it, which is beneficial to prevent the sampling cylinder from entering the water sample during the diving process and improve the quality of sampling. The mobile carrier moves the device to the water area to be sampled, and the winch mechanism releases the counterweight through the pull rope. When the bottom plate contacts the riverbed, the counterweight drives the cylinder to continue to move downward. The sampling tube moves downward relative to the guide rod, and the water sample enters the sampling tube from the lower end until the lower end of the sampling tube is plugged into the lower soft sealing plug, while the upper end of the sampling tube is not separated from the upper soft sealing plug, so that the upper soft sealing plug and the lower soft sealing plug respectively seal the two ends of the sampling tube. When the counterweight block contacts the riverbed, the water sample collection is completed, thereby preventing the muddy water stirred up by the contact between the counterweight block and the riverbed from entering the sampling tube, effectively solving the problem that the muddy water stirred up when the counterweight block touches the bottom, thereby affecting the quality of the water sample collected by the sampling tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main cross-sectional structure of the present invention in its initial state;

[0015] Figure 2 This is a schematic diagram of the main structure of the present invention in its initial state;

[0016] Figure 3 This is a schematic diagram of the main cross-sectional structure of the present invention in a sampling state;

[0017] Figure 4 This is a schematic diagram of the main structure of the sampling state of the present invention;

[0018] Figure 5 For the present invention Figure 3 A schematic diagram of the structure enlargement in the middle;

[0019] Figure 6 For the present invention Figure 3 Schematic diagram of the cross-sectional structure along the BB axis.

[0020] In the figure: 1. mobile carrier; 2. pull rope; 3. counterweight; 4. cylinder; 5. sampling cylinder; 6. force guide rod; 7. bottom contact plate; 8. upper soft sealing plug; 9. lower soft sealing plug; 10. limit plate; 11. avoidance groove; 12. sealing plate; 13. guide cylinder; 14. hinged rod; 15. flow blocking cloth; 16. driving ring; 17. connecting rod; 18. piston chamber; 19. piston; 20. through hole; 21. transmission chamber; 22. guide hole; 23. guide rod; 24. gear; 25. teeth; 26. check chamber; 27. slider; 28. check claw; 29. ​​"T"-shaped rod; 30. plug hole; 31. plug rod; 32. necking part; 33. limit ring; 34. elastic member; 35. "U"-shaped frame; 36. winding roller; 37. driving part. DETAILED DESCRIPTION

[0021] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply 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 on the present invention.

[0022] like Figure 1 to Figure 6 As shown, a water sample collection device for fishery environment monitoring includes a mobile carrier 1, a pull rope 2 and a counterweight 3. The mobile carrier 1 is provided with a winch mechanism for retracting and releasing the pull rope 2. The free end of the pull rope 2 is provided with a cylinder 4 with openings at both ends. A sampling cylinder 5 with openings at both ends is vertically provided inside the cylinder 4. The counterweight 3 is arranged at the lower end of the cylinder 4. A guide rod 6 that penetrates the counterweight 3 is vertically slidably connected at the center axis of the counterweight 3. A bottom contact plate 7 is provided at the lower end of the guide rod 6. A sampling cylinder 5 with the same length as the sampling cylinder 5 is provided at the upper end of the guide rod 6. The same upper soft sealing plug 8 is provided with a lower soft sealing plug 9 fixedly connected to the guide rod 6 below the upper soft sealing plug 8, and the upper end of the upper soft sealing plug 8 and the lower end of the lower soft sealing plug 9 are respectively provided with limit plates 10. When in use, the bottom plate 7 contacts the riverbed, and the guide rod 6 moves upward to drive the upper soft sealing plug 8 and the lower soft sealing plug 9 to move upward. After the water sample at the bottom of the water environment enters the sampling tube 5 from the lower part of the sampling tube 5, the upper soft sealing plug 8 and the lower soft sealing plug 9 respectively seal the two ends of the sampling tube 5.

[0023] Preferably, the mobile carrier 1 is a drone or a ship, so as to be suitable for collecting water samples in complex water environments.

[0024] During specific use, in the initial state, the upper soft sealing plug 8 is completely inserted into the sampling tube 5 to seal it, which is beneficial to prevent the sampling tube 5 from entering the water sample during the diving process and improve the quality of sampling. The mobile carrier 1 moves the device to the water area to be sampled, and the winch mechanism releases the counterweight 3 through the pull rope 2. When the bottom plate 7 contacts the riverbed, the counterweight 3 drives the cylinder 4 to continue to move downward, and the sampling tube 5 moves downward relative to the guide rod 6. The water sample enters the sampling tube 5 from the lower end of the sampling tube 5 until the lower end of the sampling tube 5 is plugged into the lower soft sealing plug 9, and the upper end of the sampling tube 5 is not separated from the upper soft sealing plug 8, so that the upper soft sealing plug 8 and the lower soft sealing plug 9 respectively seal the two ends of the sampling tube 5. When the counterweight 3 contacts the riverbed, the water sample collection has been completed, thereby preventing the muddy water stirred up by the contact between the counterweight 3 and the riverbed from entering the sampling tube 5, and then the device is pulled out by the winch mechanism.

[0025] In order to achieve the purpose of improving the quality of the collected water samples, preferably, a plurality of avoidance grooves 11 are arranged in an annular array at the lower end of the side wall of the cylinder 4, a sealing plate 12 is arranged above the avoidance grooves 11, a guide cylinder 13 for the force guide rod 6 to pass through is arranged at the central axis of the sealing plate 12, a plurality of hinged rods 14 passing through the corresponding avoidance grooves 11 are hinged on the outer wall of the guide cylinder 13, a flow blocking cloth 15 is arranged on the hinged rod 14, a driving ring 16 located below the sealing plate 12 is arranged on the force guide rod 6, and a plurality of hinged rods 14 passing through the corresponding avoidance grooves 11 are hinged on the outer wall of the guide cylinder 13, a flow blocking cloth 15 is arranged on the hinged rod 14, a driving ring 16 located below the sealing plate 12 is arranged on the outer wall of the driving ring 16 There are multiple connecting rods 17, and the other ends of the connecting rods 17 are hinged to the corresponding hinged rods 14. When the bottom plate 7 contacts the riverbed, the counterweight block 3 drives the cylinder 4 to continue to move downward, and the hinged rod 14 gradually expands outward, so that the flow-blocking cloth 15 stretches out, forming an umbrella-shaped flow-blocking barrier between the sampling cylinder 5 and the counterweight block 3, preventing muddy water from flowing upward from the flow-blocking barrier, and playing a role in isolating muddy water. At the same time, the sealing plate 12 can prevent muddy water from flowing from the avoidance groove 11 to the sampling cylinder 5, which is beneficial to improving the quality of the collected water samples.

[0026] In order to achieve the purpose of improving the quality of the collected water samples, preferably, a negative pressure assembly is provided at the lower part of the counterweight 3, and the negative pressure assembly includes a guide hole 22 vertically penetrating the counterweight 3, and a guide rod 23 slidably connected to the guide hole 22 is provided on the bottom plate 7. The negative pressure assembly also includes a piston chamber 18 coaxial with the guide hole 22, and the interior of the piston chamber 18 is slidably connected to a piston 19 fixedly connected to the guide rod 23. The guide rod 23 guides the lifting and lowering of the counterweight 3 through the guide hole 22. In addition, after the bottom plate 7 contacts the riverbed, the counterweight 3 drives the cylinder 4 to continue to move downward, and the piston 19 moves upward to extract the water under the counterweight 3, thereby generating a short-term negative pressure zone under the counterweight 3, so that the muddy water flows to the negative pressure zone, and avoids the muddy water flowing upward and entering the sampling cylinder 5, which is beneficial to improving the quality of the collected water samples.

[0027] In order to improve the quality of the collected water samples, preferably, a plurality of annular arrays of negative pressure components are provided, which is beneficial to increase the negative pressure in the water area below the counterweight block 3, improve the drainage effect, and thus improve the quality of the collected water samples.

[0028] In order to achieve the purpose of improving the quality of the collected water samples, preferably, a through hole 20 for the guide rod 6 to pass through is opened at the central axis of the counterweight block 3, a transmission chamber 21 is opened on one side of the through hole 20, and a gear 24 is rotatably connected inside the transmission chamber 21. The guide rod 6 is provided with teeth 25 adapted to the gear 24, a non-return chamber 26 is opened on one side of the transmission chamber 21, and a slider 27 is slidably connected inside the non-return chamber 26. An elastic member 34 is provided between the slider 27 and the side wall of the non-return chamber 26, and a non-return claw 28 for preventing the gear 24 from rotating in the opposite direction is provided on the slider 27. A socket 30 is opened on the side wall of the counterweight block 3, and a "T"-shaped rod 29 passing through the counterweight block 3 is also provided on the slider 27, and an insertion rod 31 inserted into the socket 30 is provided at the end of the "T"-shaped rod 29. A constricted portion 32 is provided at the opening, and a limit ring 33 is provided on the insertion rod 31. When the bottom plate 7 contacts the riverbed, the counterweight block 3 drives the cylinder body 4 to continue to move downward. Since the guide rod 6 is provided with teeth 25 adapted to the gear 24, the gear 24 will rotate. When the upper soft sealing plug 8 and the lower soft sealing plug 9 respectively seal the two ends of the sampling cylinder 5, the anti-return claw 28 is stuck between the two adjacent teeth of the gear 24 under the elastic potential energy of the elastic member 34, and the gear 24 cannot rotate in the reverse direction, which plays a role of limiting and fixing. Therefore, in the process of removing the device from the water environment, the upper soft sealing plug 8 and the lower soft sealing plug 9 will not be separated from the sampling cylinder 5 under the action of water pressure, so as to avoid the water from other water layers from being mixed into the water sample, which is beneficial to improving the quality of the collected water sample.

[0029] In order to achieve the purpose of taking water samples, preferably, the hoisting mechanism includes a "U"-shaped frame 35 arranged on the mobile carrier 1, and a winding roller 36 is rotatably connected between the two side walls of the "U"-shaped frame 35, and the pull rope 2 is wound around the winding roller 36. A driving part 37 with an output end fixedly connected to the winding roller 36 is provided on the side wall of the "U"-shaped frame 35. The driving part 37 is preferably a motor. During the sampling process, the winding roller 36 is driven by the driving part 37 to rotate forward and reversely to release or tighten the pull rope 2, thereby realizing the diving or ascent of the water sample collection device.

[0030] Compared with the prior art, the present invention cooperates with the mobile carrier 1, the pull rope 2, the counterweight 3, the winch mechanism, the cylinder 4, the sampling cylinder 5, the guide rod 6, the bottom plate 7, the upper soft sealing plug 8, the lower soft sealing plug 9 and the limit plate 10. In the initial state, the upper soft sealing plug 8 is fully inserted into the sampling cylinder 5 to seal it, which is beneficial to prevent the sampling cylinder 5 from entering the water sample during the diving process and improve the quality of sampling. The mobile carrier 1 moves the device to the water area to be sampled, and the winch mechanism releases the counterweight 3 through the pull rope 2. When the bottom plate 7 contacts the riverbed, the counterweight 3 drives the cylinder 4 to continue to move. The sampling tube 5 moves downward, and the sampling tube 5 moves downward relative to the guide rod 6. The water sample enters the sampling tube 5 from the lower end of the sampling tube 5 until the lower end of the sampling tube 5 is plugged into the lower soft sealing plug 9, while the upper end of the sampling tube 5 is not separated from the upper soft sealing plug 8, so that the upper soft sealing plug 8 and the lower soft sealing plug 9 respectively seal the two ends of the sampling tube 5. When the counterweight block 3 contacts the riverbed, the water sample collection is completed, thereby preventing the muddy water stirred up by the contact between the counterweight block 3 and the riverbed from entering the sampling tube 5, effectively solving the problem that the muddy water stirred up when the counterweight block 3 touches the bottom affects the quality of the water sample collected by the sampling tube 5.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water sample collection device for fishery environment monitoring, comprising a mobile carrier (1), a pull rope (2) and a counterweight (3), characterized in that: The mobile carrier (1) is provided with a hoisting mechanism for retracting and releasing the pull rope (2); the free end of the pull rope (2) is provided with a cylinder (4) with openings at both ends; a sampling cylinder (5) with openings at both ends is vertically provided inside the cylinder (4); the counterweight block (3) is provided at the lower end of the cylinder (4); a force guide rod (6) penetrating the counterweight block (3) is vertically slidably connected at the center axis of the counterweight block (3); a bottom contact plate (7) is provided at the lower end of the force guide rod (6); and an upper soft sealing plug (8) having the same length as the sampling cylinder (5) is provided at the upper end of the force guide rod (6). A lower soft sealing plug (9) fixedly connected to the force guiding rod (6) is arranged below the upper soft sealing plug (8), and a limit plate (10) is arranged at the upper end of the upper soft sealing plug (8) and the lower end of the lower soft sealing plug (9). When in use, the bottom contact plate (7) contacts the riverbed, and the force guiding rod (6) moves upward to drive the upper soft sealing plug (8) and the lower soft sealing plug (9) to move upward. After the water sample at the bottom of the water environment enters the sampling tube (5) from the lower part of the sampling tube (5), the upper soft sealing plug (8) and the lower soft sealing plug (9) respectively seal the two ends of the sampling tube (5).

2. The water sample collection device for fishery environment monitoring according to claim 1 is characterized in that: A plurality of avoidance grooves (11) are arranged in an annular array at the lower end of the side wall of the cylinder (4), a sealing plate (12) is arranged above the avoidance grooves (11), a guide cylinder (13) for the force guide rod (6) to pass through is arranged at the central axis of the sealing plate (12), a plurality of hinged rods (14) extending from the corresponding avoidance grooves (11) are hinged on the outer wall of the guide cylinder (13), a flow blocking cloth (15) is arranged on the hinged rod (14), a driving ring (16) located below the sealing plate (12) is arranged on the force guide rod (6), a plurality of connecting rods (17) are hinged on the outer wall of the driving ring (16), and the other ends of the connecting rods (17) are respectively hinged to the corresponding hinged rods (14).

3. The water sample collection device for fishery environment monitoring according to claim 1 or 2, characterized in that: A negative pressure assembly is provided at the lower part of the counterweight block (3), and the negative pressure assembly comprises a guide hole (22) vertically penetrating the counterweight block (3). A guide rod (23) slidably connected to the guide hole (22) is provided on the bottom contact plate (7).

4. The water sample collection device for fishery environment monitoring according to claim 3 is characterized in that: The negative pressure assembly further comprises a piston chamber (18) coaxial with the guide hole (22), wherein a piston (19) fixedly connected to the guide rod (23) is slidably connected inside the piston chamber (18).

5. The water sample collection device for fishery environment monitoring according to claim 4 is characterized in that: The negative pressure components are provided in a plurality of annular arrays.

6. The water sample collection device for fishery environment monitoring according to claim 5 is characterized in that: A through hole (20) for the force guide rod (6) to pass through is provided at the center axis of the counterweight block (3); a transmission cavity (21) is provided on one side of the through hole (20); a gear (24) is rotatably connected inside the transmission cavity (21); teeth (25) matching the gear (24) are provided on the force guide rod (6); a check cavity (26) is provided on one side of the transmission cavity (21); a slider (27) is slidably connected inside the check cavity (26) ), an elastic member (34) is provided between the slider (27) and the side wall of the check cavity (26), a check claw (28) is provided on the slider (27) for preventing the gear (24) from rotating in the reverse direction, a plug hole (30) is provided on the side wall of the counterweight (3), a "T"-shaped rod (29) passing through the counterweight (3) is also provided on the slider (27), and an insertion rod (31) inserted into the plug hole (30) is provided at the end of the "T"-shaped rod (29).

7. The water sample collection device for fishery environment monitoring according to claim 6 is characterized in that: A constricted portion (32) is provided at the opening of the insertion hole (30), and a limiting ring (33) is provided on the insertion rod (31).

8. The water sample collection device for fishery environment monitoring according to claim 7 is characterized in that: The hoisting mechanism comprises a U-shaped frame (35) arranged on a mobile carrier (1), a winding roller (36) is rotatably connected between two side walls of the U-shaped frame (35), the pull rope (2) is wound around the winding roller (36), and a driving part (37) whose output end is fixedly connected to the winding roller (36) is arranged on the side wall of the U-shaped frame (35).

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