Lake sediment collection and nitrogen cycle research device

Abstract

The invention relates to the technical field of environmental monitoring and ecological research, and discloses a lake sediment collection and nitrogen cycle research device which comprises a supporting plate, a first frame body, a temporary storage hopper, a second frame body, a vertical rod, a stirring rod, a liquid storage frame, a spraying pipe, a lifting regulation and control assembly and a driving mechanism. The first frame body is arranged on the supporting plate, and the temporary storage hopper is arranged in the first frame body; the second frame body is arranged on the supporting plate and is adjacent to the first frame body, and the vertical rod rotatably penetrates through the second frame body; the stirring rod is arranged in the second frame body and is in transmission connection with the vertical rod; the liquid storage frame sleeves the peripheral side of the stirring rod; the plurality of spraying pipes are arranged on the liquid storage frame and are communicated with the interior of the liquid storage frame; the lifting regulation and control assembly is connected with the stirring rod, and the driving mechanism is used for driving the first frame body to move relative to the supporting plate, so that the temporary storage hopper can move into or out of the second frame body along with the first frame body; the problem of accumulation when the deionized water is directly added is avoided, and the stirring time is shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental monitoring and ecological research, in particular to a lake sediment collection and nitrogen cycle research device. BACKGROUND

[0002] Nitrogen is a core nutrient element in lake ecosystems, widely involved in the construction of life substances such as proteins and nucleic acids, and its content balance directly affects the stability of the ecological system. When nitrogen is excessive, it is easy to cause algae to grow wildly, water dissolved oxygen to be depleted, and other problems, so the research on the nitrogen cycle in lake sediments has important practical significance for maintaining the health of the ecological system, optimizing water quality management, and responding to climate change. This research process urgently needs a special lake sediment collection and nitrogen cycle research device to provide technical support.

[0003] There are related nitrogen cycle research devices in the prior art. For example, a soil nitrogen cycle research device is disclosed in Patent No. CN218036823U, which drives the driving gear through the shaft, engages three driven gears to drive the stirring rod and stirring blades to rotate, realizes the mixing of soil and deionized water, and then introduces nitrogen into the sampling bottle through the air guide pipe to react with boric acid solution to measure the ammonia volatilization amount and calculate the nitrogen content. Another soil nitrogen cycle research device with Patent No. CN220820015U controls the opening and closing of the sealing cover and the lifting of the receiving plate by means of the telescopic rod, and cooperates with the motor to drive the stirring shaft to stir, and then the solution is discharged through the liquid discharge pipe for nitrogen content detection.

[0004] However, the above-mentioned existing devices have obvious limitations in actual application: they all use the method of directly opening the tank body to add deionized water, which causes the deionized water to accumulate into a lump after being added, and a long time is needed for stirring, which significantly reduces the mixing efficiency of the sediment and deionized water, and further affects the overall progress and data accuracy of the nitrogen cycle research, and cannot meet the efficient development needs of the lake sediment nitrogen cycle research. SUMMARY

[0005] The present application provides a lake sediment collection and nitrogen cycle research device to solve the above problems.

[0006] The present application provides a lake sediment collection and nitrogen cycle research device, comprising: a support plate; a first frame body arranged on the support plate; a temporary storage hopper arranged inside the first frame body for accommodating sediment samples; a second frame body arranged on the support plate adjacent to the first frame body, the bottom surface of the second frame body being provided with a through slot; a vertical rod rotatably penetrating the second frame body; An agitating rod is arranged inside the second frame body and in transmission connection with the vertical rod to rotate with the vertical rod; A liquid storage frame is sleeved around the agitating rod; A plurality of spraying pipes are arranged on the liquid storage frame and in communication with the inside of the liquid storage frame; A lifting control assembly is connected with the agitating rod to drive the agitating rod to move up and down along the axial direction of the vertical rod; and A driving mechanism is used to drive the first frame body to move relative to the support plate, so that the temporary storage hopper can move into or out of the inside of the second frame body along with the first frame body.

[0007] The liquid storage frame is sleeved around the agitating rod, and the plurality of spraying pipes are in communication with the inside of the liquid storage frame. In combination with the transmission connection of the agitating rod and the vertical rod, the vertical rod rotates to drive the agitating rod to rotate synchronously, and in turn drives the spraying pipes to rotate around the agitating rod, so that the deionized water is uniformly dispersed and sprayed into the sediment sample in the temporary storage hopper, thereby avoiding the accumulation problem when the deionized water is directly added. At the same time, the lifting control assembly is connected with the agitating rod to drive the agitating rod to move up and down along the axial direction of the vertical rod, so that the agitating rod can realize reciprocating motion up and down while rotating and stirring, greatly increasing the contact area and frequency of the sediment and the deionized water, significantly shortening the stirring time, and effectively improving the mixing efficiency of the two. In addition, the driving mechanism can drive the first frame body to move relative to the support plate, so that the temporary storage hopper can smoothly move into the second frame body to cooperate with the agitating rod and the spraying pipes to complete the mixing operation, without the need for additional tools to transfer the sample, reducing the time-consuming of intermediate links, and effectively accelerating the overall progress of the nitrogen cycle research in combination with the high-efficiency mixing effect. The uniform mixing of the sediment and the deionized water can ensure the stability and consistency of the subsequent nitrogen cycle related reactions (such as the conversion of nitrogen-containing substances), avoid local reaction differences caused by uneven mixing, and in turn ensure the accuracy of the nitrogen cycle research data, fully meeting the needs of efficient development of lake sediment nitrogen cycle research.

[0008] In an optional embodiment, the lifting control assembly comprises: A support sleeve plate is sleeved outside the vertical rod and in rotational connection with the top end of the agitating rod. The support sleeve plate is configured to drive the agitating rod to move synchronously along the axial direction of the vertical rod; A horizontal plate is fixedly connected with the support sleeve plate; A threaded rod is in threaded connection with the horizontal plate, and the upper end of the threaded rod is in rotational connection with the upper surface of the second frame body; and A reciprocating driving mechanism is used to drive the threaded rod to reciprocate in forward and reverse directions.

[0009] In an optional embodiment, the reciprocating driving mechanism comprises: A sector gear is fixed on the vertical rod; A transmission gear configured to be able to intermittently engage with the sector gear; A pull rod fixedly connected with the transmission gear; A connecting column axially slidingly arranged in the threaded rod, the connecting column being fixed with the pull rod; A plug-in rod fixed with the threaded rod, the connecting column being provided with a vertical slot, and the plug-in rod being slidingly arranged in the vertical slot; A spiral spring arranged at the connection between the threaded rod and the second frame; The pull rod is arranged to be pulled up to make the transmission gear have a height difference with the sector gear, or to be lowered to make the transmission gear be in the same plane as the sector gear.

[0010] In an alternative embodiment, the liquid storage frame comprises: An upper liquid storage frame fixedly connected with the support sleeve plate; A lower liquid storage frame rotationally connected with the upper liquid storage frame, the lower liquid storage frame being fixed with the agitating rod, and the spraying pipe being arranged through the lower liquid storage frame.

[0011] In an alternative embodiment, the agitating rod is hollow, and is slidingly connected with a sliding slot arranged on the vertical rod through a sliding block, so as to realize the synchronous rotation and relative axial sliding between the agitating rod and the vertical rod.

[0012] In an alternative embodiment, a sampling pipe is arranged through the support plate, and an opening at the top end of the sampling pipe is used to correspond to the bottom inlet of the temporary storage hopper.

[0013] In an alternative embodiment, the bottom surface of the first frame is slidingly connected with the upper surface of the support plate through a guide rail, the first frame has a sampling position and a mixing position; In the sampling position, the temporary storage hopper is arranged on the upper side of the sampling pipe and communicates with the sampling pipe; In the mixing position, the first frame and the temporary storage hopper are arranged in the second frame, and the agitating rod is arranged in the temporary storage hopper.

[0014] In an alternative embodiment, the sampling pipe is detachably connected with the support plate.

[0015] In an alternative embodiment, a gas collection system is further included, the gas collection system comprising a sampling bottle, a flow meter and a gas suction pump which are sequentially communicated through pipelines, and the sampling bottle communicates with the inside of the second frame through a pipeline.

[0016] In an alternative embodiment, a plurality of support legs are provided below the support plate, and an electric push rod is used to drive the support plate to move up and down relative to the support legs. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0018] Figure 1 FIG. 1 is a schematic diagram of the internal structure of a lake sediment collection and nitrogen cycle research device according to an embodiment of the present application; Figure 2 FIG. 2 is a schematic diagram of the overall structure of a lake sediment collection and nitrogen cycle research device according to an embodiment of the present application (first frame open); Figure 3 FIG. 3 is a schematic diagram of the overall structure of a lake sediment collection and nitrogen cycle research device according to an embodiment of the present application (first frame closed); Figure 4 FIG. 4 is a schematic diagram of the internal structure of a second frame of a lake sediment collection and nitrogen cycle research device according to an embodiment of the present application; Figure 5 FIG. 5 is a schematic diagram of the structure of a lifting control assembly of a lake sediment collection and nitrogen cycle research device according to an embodiment of the present application; Figure 6 FIG. 6 is a schematic diagram of the structure of an agitator rod inside a temporary hopper of a lake sediment collection and nitrogen cycle research device according to an embodiment of the present application; Figure 7 FIG. 7 is a schematic diagram of the structure of a threaded rod of a lake sediment collection and nitrogen cycle research device according to an embodiment of the present application. Figure 5 Figure 8 FIG. 8 is a schematic diagram of the structure of a threaded rod of a lake sediment collection and nitrogen cycle research device according to an embodiment of the present application.

[0019] Explanation of Reference Signs: 1, support plate; 2, support legs; 3, first frame; 4, sampling tube; 5, second frame; 51, through slot; 6, sampling bottle; 7, flow meter; 8, air suction pump; 9, temporary hopper; ​10, threaded rod; 101, volute spring; 102, plug-in rod; 103, pull rod; 104, transmission gear; 105, connecting column; 11, vertical rod; 111, sector gear; 112, sliding slot; 12, discharge pipe; 13, stirring rod; 131, sliding block; 14, lower liquid storage frame; 141, upper liquid storage frame; 142, spraying pipe; 15, support sleeve plate; 151, horizontal plate; 16, connecting hose. DETAILED DESCRIPTION

[0020] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] Nitrogen is the core nutrient element of lake ecosystems, widely involved in the construction of life substances such as proteins and nucleic acids, and its content balance directly affects the stability of the ecological system. When nitrogen is excessive, it is easy to cause the wild growth of algae, the depletion of water dissolved oxygen, and other problems, so the research on the nitrogen cycle in lake sediments has important practical significance for maintaining the health of the ecological system, optimizing water quality management and responding to climate change. This research process urgently needs a special lake sediment collection and nitrogen cycle research device to provide technical support.

[0022] There are related nitrogen cycle research devices in the prior art. For example, the patent with publication number CN218036823U discloses a soil nitrogen cycle research device, which drives the driving gear through the shaft, engages three driven gears to drive the stirring rod and stirring blade to rotate, realizes the mixing of soil and deionized water, and then introduces nitrogen into the sampling bottle through the air guide pipe to react with boric acid solution to determine the ammonia volatilization amount to calculate the nitrogen content. Another soil nitrogen cycle research device with publication number CN220820015U controls the opening and closing of the sealing cover and the lifting of the material receiving plate by means of the telescopic rod, and cooperates with the motor to drive the stirring shaft to stir. After mixing, the solution is discharged through the liquid discharge pipe for nitrogen content detection.

[0023] However, the above-mentioned existing devices have obvious limitations in actual application: they all use the method of directly opening the tank body to add deionized water, which causes the deionized water to accumulate into a lump after being added, and a long time is needed for stirring, which significantly reduces the mixing efficiency of the sediment and deionized water, and further affects the overall progress and data accuracy of the nitrogen cycle research, which cannot meet the efficient development needs of the lake sediment nitrogen cycle research.

[0024] The following is combined Figures 1 to 8 The following describes embodiments of the present invention.

[0025] According to an embodiment of the present invention, a lake sediment collection and nitrogen cycle research device is provided, including a support plate 1, a first frame 3, a temporary storage hopper 9, a second frame 5, a vertical rod 11, a stirring rod 13, a liquid storage frame, a spray pipe 142, a lifting and regulating component, and a driving mechanism. A first frame 3 is disposed on the support plate 1, and a temporary storage hopper 9 is disposed inside the first frame 3 for containing sediment samples; a second frame 5 is disposed on the support plate 1 and adjacent to the first frame 3, and a through groove 51 is provided on the bottom surface of the second frame 5; a vertical rod 11 rotatably passes through the second frame 5; a stirring rod 13 is disposed inside the second frame 5 and is drivenly connected to the vertical rod 11 so as to rotate with it; a liquid storage frame is sleeved around the stirring rod 13; multiple spray pipes 142 are disposed on the liquid storage frame and communicate with the interior of the liquid storage frame; a lifting and adjusting assembly is connected to the stirring rod 13 for driving the stirring rod 13 to move up and down along the axial direction of the vertical rod 11; a driving mechanism is used to drive the first frame 3 to move relative to the support plate 1 so that the temporary storage hopper 9 can move into or out of the second frame 5 along with the first frame 3.

[0026] The first frame 3 is movably mounted on the upper surface of the support plate 1. The temporary storage hopper 9 is fixedly mounted inside the first frame 3. The cavity structure of the temporary storage hopper 9 is adapted to the internal space of the first frame 3, and can stably receive and accommodate the collected sediment samples. The second frame 5 is also mounted on the upper surface of the support plate 1 and is arranged adjacent to the first frame 3. The two form adjacent working areas on the support plate 1. A through groove 51 is provided on the bottom surface of the second frame 5. The position of the through groove 51 corresponds to the bottom position of the temporary storage hopper 9 after it is moved into the second frame 5, which can meet the needs of the subsequent... To meet the needs of material flow, the vertical rod 11 is rotatable and vertically penetrates the upper and lower surfaces of the second frame 5, with its rotation axis aligned with the center area of ​​the second frame 5 to ensure stability during rotation. The stirring rod 13 is located inside the second frame 5 and is connected to the vertical rod 11 through a transmission connection structure. When the vertical rod 11 rotates, it can directly drive the stirring rod 13 to rotate synchronously, thereby agitating the material. The liquid storage frame is annularly fitted around the stirring rod 13, and multiple spray pipes 142 are evenly distributed on the outer wall of the liquid storage frame. One end of each spray pipe 142 is... The liquid storage box is connected to its internal cavity, allowing the liquid inside to be sprayed evenly through the spray pipe 142. One end of the lifting control component is connected to the stirring rod 13, and the other end is engaged with the second frame 5. During operation, it generates a driving force along the axial direction of the vertical rod 11, thereby driving the stirring rod 13 to move up and down along the axial direction of the vertical rod 11. The output end of the drive mechanism is connected to the side wall of the first frame 3. Under the drive of the drive mechanism, the first frame 3 can move horizontally along the upper surface of the support plate 1. When the first frame 3 moves towards the second frame 5... When in motion, the lifting control component drives the stirring rod 13 to move upward to provide space for the movement of the temporary storage hopper 9. The temporary storage hopper 9 moves into the interior of the second frame 5 together with the first frame 3. Then, the stirring rod 13 moves downward into the interior of the temporary storage hopper 9. When the first frame 3 moves away from the second frame 5, the lifting control component drives the stirring rod 13 to move upward to leave the interior of the temporary storage hopper 9. The temporary storage hopper 9 then moves out of the interior of the second frame 5 together with the first frame 3. This realizes the position switching of the temporary storage hopper 9 between the first frame 3 and the second frame 5 to adapt to the needs of different working stages.

[0027] In one embodiment, the lifting control assembly includes a support sleeve 15, a horizontal plate 151, a threaded rod 10, and a reciprocating drive mechanism; the support sleeve 15 is sleeved on the outside of the vertical rod 11 and rotatably connected to the top end of the stirring rod 13; the support sleeve 15 is configured to drive the stirring rod 13 to move synchronously along the axial direction of the vertical rod 11; the horizontal plate 151 is fixedly connected to the support sleeve 15; the threaded rod 10 is threadedly connected to the horizontal plate 151, and the upper end of the threaded rod 10 is rotatably connected to the upper surface of the second frame 5; the reciprocating drive mechanism is used to drive the threaded rod 10 to perform reciprocating forward and reverse rotation.

[0028] In this embodiment, the support sleeve 15 is annularly sleeved on the outside of the vertical rod 11. Its inner wall is adapted to the outer wall of the vertical rod 11 but not fixed. At the same time, the lower end of the support sleeve 15 is connected to the top end of the stirring rod 13 through a bearing, so that the support sleeve 15 can rotate relative to the stirring rod 13 and can drive the stirring rod 13 to move synchronously along the axial direction of the vertical rod 11 when it moves along the axial direction of the vertical rod 11. One end of the horizontal plate 151 is fixedly connected to the outer wall of the support sleeve 15, and the two form a stable integrated structure. The plate surface of the horizontal plate 151 is horizontal, and a threaded hole adapted to the threaded rod 10 is opened in the middle of the horizontal plate 151. The threaded rod 10 is arranged in the vertical direction, and its rod body is threadedly connected to the horizontal plate 151 through the threaded hole. The upper end of the threaded rod 10 is rotated. The connector passes through the upper surface of the second frame 5, allowing the threaded rod 10 to rotate freely relative to the second frame 5 while maintaining a fixed axial position. The reciprocating drive mechanism is connected to the upper or middle part of the threaded rod 10. During operation, the reciprocating drive mechanism can output alternating forward and reverse driving forces, driving the threaded rod 10 to reciprocate in both forward and reverse directions. When the threaded rod 10 rotates forward, it drives the horizontal plate 151 to rise vertically through the threaded engagement. The horizontal plate 151 drives the support sleeve 15 to rise synchronously, thereby pulling the stirring rod 13 to move upward along the vertical rod 11. When the threaded rod 10 rotates in reverse, it similarly drives the horizontal plate 151, the support sleeve 15, and the stirring rod 13 to move downward along the vertical rod 11, ultimately achieving the reciprocating lifting and lowering motion of the stirring rod 13 along the vertical rod 11.

[0029] In one embodiment, the reciprocating drive mechanism includes a sector gear 111, a transmission gear 104, a pull rod 103, a connecting rod 105, a plug-in rod 102, and a spiral spring 101. The sector gear 111 is fixed to the vertical rod 11; the transmission gear 104 is configured to intermittently mesh with the sector gear 111; the pull rod 103 is fixedly connected to the transmission gear 104; the connecting rod 105 is slidably disposed within the threaded rod 10 along the axial direction of the threaded rod 10. 5 is fixed to the pull rod 103; the plug rod 102 is fixed to the threaded rod 10, the connecting column 105 is provided with a vertical groove, and the plug rod 102 is slidably disposed in the vertical groove; the spiral spring 101 is disposed at the connection between the threaded rod 10 and the second frame 5; wherein, the pull rod 103 is configured to be able to be pulled up to drive the transmission gear 104 and the sector gear 111 to have a height difference, or to be lowered to drive the transmission gear 104 and the sector gear 111 to be in the same plane.

[0030] In this embodiment, the reciprocating drive mechanism includes a sector gear 111, a transmission gear 104, a pull rod 103, a connecting column 105, a plug-in rod 102, and a spiral spring 101. The sector gear 111 is fixedly fitted onto the outside of the vertical rod 11 and rotates synchronously with the rotation of the vertical rod 11. The transmission gear 104 is adapted to the sector gear 111 and is configured to intermittently mesh with the sector gear 111 at a specific position. One end of the pull rod 103 is fixedly connected to the transmission gear 104, which can drive the transmission gear 104 to synchronously perform lifting or rotating movements. The connecting post 105 is arranged along the axial direction of the threaded rod 10 and slides inside the threaded rod 10. One end of the connecting post 105 is fixedly connected to the end of the pull rod 103 away from the transmission gear 104, and moves synchronously with the movement of the pull rod 103. The plug rod 102 is fixed to the threaded rod 10. The connecting post 105 is provided with a vertical groove, and the plug rod 102 is slidably arranged in the vertical groove. This allows the pull rod 103 to move up and down independently relative to the threaded rod 10, and at the same time, it can drive the threaded rod 10 to rotate through the plug rod 102. The spiral spring 101 is also included. On the outside of the threaded rod 10, with one end fixed to the outer wall of the threaded rod 10 and the other end fixed to the upper surface of the second frame 5, it is used to store elastic potential energy and assist its reset when the threaded rod 10 rotates; wherein, the pull rod 103 is configured to be able to be pulled upward, and when pulled, it drives the transmission gear 104 to move upward, so that a height difference is formed between the transmission gear 104 and the sector gear 111, and the two are disengaged. At this time, rotating the pull rod 103 can drive the threaded rod 10 to rotate through the connecting column 105 and the plug rod 102, and the spiral spring 101 stores force accordingly; when released When the pull rod 103 is opened or pushed down, the transmission gear 104 moves downward with the pull rod 103 and returns to the same plane as the sector gear 111. When the vertical rod 11 drives the sector gear 111 to rotate, the sector gear 111 will intermittently mesh with the transmission gear 104, driving the transmission gear 104 to rotate. In turn, the threaded rod 10 is driven to rotate through the pull rod 103, the connecting column 105, and the plug rod 102. With the reset action of the spiral spring 101, the reciprocating forward and reverse rotation of the threaded rod 10 is realized, thereby realizing the synchronous up and down movement of the stirring rod 13.

[0031] In one embodiment, the liquid storage frame includes an upper liquid storage frame 141 and a lower liquid storage frame 14. The upper liquid storage frame 141 is fixedly connected to the support sleeve 15; the lower liquid storage frame 14 is rotatably connected to the upper liquid storage frame 141; the lower liquid storage frame 14 is fixed to the periphery of the stirring rod 13, and the spray pipe 142 passes through the lower liquid storage frame 14. Specifically, the upper liquid storage frame 141 is connected to the upper part of the lower liquid storage frame 14 via a sealed bearing.

[0032] In this embodiment, the liquid storage frame includes an upper liquid storage frame 141 and a lower liquid storage frame 14. The upper liquid storage frame 141 is fixedly connected to the support sleeve 15. When the support sleeve 15 moves up and down along the vertical rod 11 or remains stationary, the upper liquid storage frame 141 moves up and down synchronously with the support sleeve 15 or remains in a fixed position. The upper liquid storage frame 141 is connected to the lower liquid storage frame 141 above by a sealed bearing. The sealed bearing can realize the relative rotation between the lower liquid storage frame 14 and the upper liquid storage frame 141, and also ensure the sealing of the connection between the two to prevent liquid leakage inside the liquid storage frame. At the same time, the lower liquid storage frame 14 is fixedly connected to the periphery of the stirring rod 13, so that when the stirring rod 13 rotates, it will directly drive the lower liquid storage frame 14 to rotate synchronously. When the stirring rod 13 moves up and down along the vertical rod 11, it will also drive the lower liquid storage frame 14 to move up and down together. The spray pipe 142 is installed on the lower liquid storage frame 14, and the interior of the spray pipe 142 is connected to the interior of the lower liquid storage frame 14. When liquid is injected into the upper liquid storage frame 141, it will flow into the lower liquid storage frame 14 through the communication structure between the upper liquid storage frame 141 and the lower liquid storage frame 14, and then be sprayed out through the spray pipe 142 installed on the lower liquid storage frame 14. During operation, when the support sleeve 15 drives the upper liquid storage frame 141 to rise and fall, it will drive the lower liquid storage frame 14 and the stirring rod 13 to rise and fall together through the sealed bearing. When the stirring rod 13 rotates, it will drive the lower liquid storage frame 14 and the spray pipe 142 to rotate synchronously. The upper liquid storage frame 141 is fixed to the support sleeve 15 and does not rotate with the lower liquid storage frame 14. The sealed bearing always maintains the sealed connection and relative rotation relationship between the two during this process, ensuring that the liquid is stably delivered to the spray pipe 142 and uniformly sprayed.

[0033] In one embodiment, the stirring rod 13 is hollow inside and is slidably connected to the vertical rod 11 by a slider 131 engaging with a groove 112 formed on the vertical rod 11, so as to realize synchronous rotation and relative axial sliding between the stirring rod 13 and the vertical rod 11.

[0034] In one embodiment, the lake sediment collection and nitrogen cycle research apparatus further includes a sampling tube 4 that extends through the support plate 1 and has an opening at its top corresponding to the bottom inlet of the temporary storage hopper 9.

[0035] In one embodiment, the bottom surface of the first frame 3 is slidably connected to the upper surface of the support plate 1 via a guide rail. The first frame 3 has a sampling position and a mixing position. In the sampling position, the temporary storage hopper 9 is located above the sampling tube 4 and communicates with the sampling tube 4. In the mixing position, the first frame 3 and the temporary storage hopper 9 are located inside the second frame 5, and the stirring rod 13 is located inside the temporary storage hopper 9.

[0036] In this embodiment, the bottom surface of the first frame 3 is slidably connected to the upper surface of the support plate 1 via a guide rail. Specifically, the upper surface of the support plate 1 is fixedly provided with a guide rail adapted to the bottom surface of the first frame 3, and the bottom surface of the first frame 3 is provided with a groove matching the guide rail. The groove is embedded in the guide rail and can slide stably along the length of the guide rail, thereby realizing the directional movement of the first frame 3 relative to the support plate 1. The first frame 3 has a sampling position and a mixing position. In the sampling position, the first frame 3 slides along the guide rail to the side of the support plate 1 away from the second frame 5. At this time, the temporary storage hopper 9 is in the sampling position. The bottom opening of the temporary storage hopper 9 is aligned with and connected to the top opening of the sampling tube 4, allowing the sediment sample collected by the sampling tube 4 to fall directly into the temporary storage hopper 9, thus completing the collection of the sediment sample. At the mixing position, the first frame 3 slides along the guide rail towards the second frame 5 until the first frame 3 and the temporary storage hopper 9 are completely moved into the second frame 5. At this point, the position of the temporary storage hopper 9 corresponds to the stirring rod 13, which extends into the interior of the temporary storage hopper 9, allowing the stirring rod 13 to process the sediment sample inside the temporary storage hopper 9 through rotation and lifting movements. A flap gate structure can be installed at the bottom of the temporary storage hopper 9 to prevent the material inside from spilling out.

[0037] In one embodiment, the sampling tube 4 and the support plate 1 are detachably connected.

[0038] The sampling tube 4 and the support plate 1 are detachably connected. Specifically, the sampling tube 4 passes through a pre-set mounting hole on the support plate 1, and the outer wall of the sampling tube 4 and the inner wall of the mounting hole are fitted with a suitable thread structure to achieve detachable fixation. When it is necessary to use the device to collect sediment, the sampling tube 4 can be screwed into the mounting hole of the support plate 1 along the thread until the top of the sampling tube 4 is aligned with the bottom surface of the temporary storage hopper 9 inside the first frame 3, ensuring that the sediment collected by the sampling tube 4 can fall smoothly into the temporary storage hopper 9. When the lake is surrounded by sediment... When it is inconvenient to place the entire device stably, or when it is necessary to carry the sampling tube 4 separately to other locations to collect sediment, the sampling tube 4 can be rotated in the opposite direction to unscrew it from the mounting hole of the support plate 1 along the thread, thereby separating the sampling tube 4 from the support plate 1. After the sampling tube 4 has collected sediment, it can be screwed back into the mounting hole of the support plate 1, and the sediment in the sampling tube 4 can be sent into the temporary storage hopper 9 to cooperate with the second frame 5, vertical rod 11, stirring rod 13 and other components to complete the subsequent mixing and nitrogen cycling research related operations.

[0039] In one embodiment, the lake sediment collection and nitrogen cycle research apparatus further includes a gas collection system comprising a sampling bottle 6, a flow meter 7, and a vacuum pump 8 connected in sequence via pipes, wherein the sampling bottle 6 is connected to the interior of the second frame 5 via pipes.

[0040] The pipes are connected to the interfaces of each component. One interface of the sampling bottle 6 is connected to the input end of the flow meter 7 through a pipe, and the output end of the flow meter 7 is connected to the air inlet of the vacuum pump 8 through another pipe. All connections between the pipes and the sampling bottle 6, the flow meter 7, and the vacuum pump 8 are sealed to prevent gas leakage. At the same time, the other interface of the sampling bottle 6 extends into the internal space of the second frame 5 through a pipe. The end of the pipe must penetrate into the interior of the second frame 5 and not interfere with other components inside the frame (such as the stirring rod 13 and the temporary storage hopper 9) to ensure effective collection of gas inside the second frame 5. During operation, after the sediment and liquid in the second frame 5 are mixed and nitrogen-containing gas is generated, the vacuum pump 8 is started. The negative pressure generated by the vacuum pump 8 guides the nitrogen-containing gas in the second frame 5 into the sampling bottle 6 through the pipe connecting the second frame 5 and the sampling bottle 6. The gas undergoes specific treatment in the sampling bottle 6 (such as reacting with the substances in the bottle and leaving it). Then, the gas treated by the sampling bottle 6 flows into the flow meter 7 through the pipe. The flow meter 7 monitors and records the gas flow data in real time. Finally, the metered gas is extracted by the vacuum pump 8 through the pipe, thereby realizing the collection and flow monitoring of nitrogen-related gases in the second frame 5, providing basic data for subsequent nitrogen content analysis.

[0041] In one embodiment, the lake sediment collection and nitrogen cycle research apparatus further includes a plurality of telescopic support legs 2 disposed below the support plate 1, and an electric push rod for driving the support plate 1 to rise and fall relative to the telescopic support legs 2.

[0042] The specific implementation method of the lake sediment collection and nitrogen cycle research device provided in this embodiment is as follows: When the area around the lake is suitable for stable placement of the entire device, move the device to the lakeside. Then, activate the electric push rod under the support plate 1, causing the support plate 1 and sampling tube 4 to move downwards. At this time, the telescopic support leg 2 retracts, and the lower end of the sampling tube 4 is inserted into the lake soil, allowing soil to enter the sampling tube 4. As the sampling tube 4 continues to move downwards, when a certain amount of soil accumulates in the sampling tube 4, some of the soil can directly enter the temporary storage hopper 9. Simultaneously, the support plate 1 can be raised and reset using the electric push rod. Then, external rods can be removed and inserted into the sampling hopper. Inside tube 4, the soil inside sampling tube 4 is pushed into temporary storage hopper 9. Then, the electric push rod on the upper left side of support plate 1 is activated, pushing the first frame 3 to the right. At the same time, the pull rod 103 is manually pulled upward and then rotated. The pull rod 103 drives the transmission gear 104 to move upward, so that the transmission gear 104 and the sector gear 111 are not meshed. When the pull rod 103 is pulled upward, it drives the connecting post 105 to move upward together. At this time, the fixed cylindrical plug rod 102 is always inserted into the vertical groove opened inside the connecting post 105. Then, when the pull rod 103 rotates, it drives the connecting post 105 to move upward together. When the connecting column 105 rotates, it drives the insertion rod 102 to rotate as well. The insertion rod 102 drives the threaded rod 10 to rotate as well. Therefore, through the insertion and sliding connection between the insertion rod 102 and the connecting column 105, the pull rod 103 rotates, driving the threaded rod 10 to rotate as well. At the same time, it will not affect the subsequent lifting and lowering operation of the pull rod 103. When the threaded rod 10 rotates, it drives the outer threaded horizontal plate 151 to move upward. The horizontal plate 151 drives the support sleeve 15 and the stirring rod 13 to move upward. The stirring rod 13 slides upward on the outside of the vertical rod 11. At this time, the slider 131 engages and slides in the slide groove 112. When the stirring rod 1... When the lowest point of 3 is higher than the highest point of the temporary storage hopper 9, the rotation of the pull rod 103 stops. At this time, the spiral spring 101 stores energy, and then the first frame 3 drives the temporary storage hopper 9 to slide into the second frame 5. At this time, the lower end of the temporary storage hopper 9 is tightly attached to the upper end of the discharge pipe 12 through the through groove 51. Then the pull rod 103 is released. Through the gravity of the pull rod 103 and the transmission gear 104, the pull rod 103 and the connecting column 105 automatically move downward to reset. At the same time, the threaded rod 10 rotates in the opposite direction, causing the horizontal plate 151 to drive the support sleeve 15 and the stirring rod 13 to move downward to reset. At this time, the stirring rod 13 is inserted into the temporary storage hopper 9.

[0043] Next, connect the outer end of the connecting hose 16 to the external deionized water delivery mechanism, so that deionized water enters the lower storage frame 14 and the upper storage frame 141 through the connecting hose 16. Then, the deionized water is sprayed into the temporary storage hopper 9 through the spray pipe 142 to mix with the soil. At this time, connect the upper end of the vertical rod 11 to the external motor through the coupling. The motor drives the vertical rod 11 to rotate, and the vertical rod 11 drives the stirring rod 13 to rotate. The stirring rod 13 drives the lower storage frame 14 and the spray pipe 142 to rotate. Since the upper storage frame 141 is fixedly installed on the bottom surface of the support sleeve 15 through the column, the upper storage frame 141... The upper liquid storage frame 141 is fixed and does not rotate with the lower liquid storage frame 14. Since the upper liquid storage frame 141 is connected to the lower liquid storage frame 14 via a sealed bearing, there will be no liquid leakage at the connection between the lower and upper liquid storage frames 141. As a result, when the lower liquid storage frame 14 rotates, the connecting hose 16 can effectively deliver deionized water into the lower liquid storage frame 14 when connected and used in conjunction with the upper liquid storage frame 141. This allows the spray pipe 142 to spray deionized water evenly, which in turn allows the deionized water to mix and contact the soil in the temporary storage hopper 9 evenly, thereby improving the efficiency of soil and deionized water mixing in the later stage and shortening the reaction time.

[0044] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A device for collecting lake sediments and studying nitrogen cycling, characterized in that, include: Support plate (1); The first frame (3) is disposed on the support plate (1); A temporary storage hopper (9) is set inside the first frame (3) to hold sediment samples; The second frame (5) is disposed on the support plate (1) and adjacent to the first frame (3), and the bottom surface of the second frame (5) is provided with a through groove (51). The vertical rod (11) rotatably passes through the second frame (5); A stirring rod (13) is disposed inside the second frame (5) and is connected to the vertical rod (11) for rotation. A liquid storage frame is fitted around the agitator (13); Multiple spray pipes (142) are disposed on the liquid storage frame and communicate with the interior of the liquid storage frame; The lifting control component is connected to the stirring rod (13) and is used to drive the stirring rod (13) to move up and down along the axial direction of the vertical rod (11); as well as A driving mechanism is used to drive the first frame (3) to move relative to the support plate (1) so that the temporary storage bucket (9) can move into or out of the second frame (5) along with the first frame (3).

2. The lake sediment collection and nitrogen cycle research apparatus according to claim 1, characterized in that, The lifting control component includes: A support sleeve (15) is sleeved on the outside of the vertical rod (11) and rotatably connected to the top end of the stirring rod (13); the support sleeve (15) is configured to drive the stirring rod (13) to move synchronously along the axial direction of the vertical rod (11); A horizontal plate (151) is fixedly connected to the support sleeve plate (15); A threaded rod (10) is threadedly connected to the cross plate (151), and the upper end of the threaded rod (10) is rotatably connected to the upper surface of the second frame (5); and A reciprocating drive mechanism is used to drive the threaded rod (10) to reciprocate in both forward and reverse directions.

3. The lake sediment collection and nitrogen cycle research apparatus according to claim 2, characterized in that, The reciprocating drive mechanism includes: A sector gear (111) is fixed to the vertical rod (11); The transmission gear (104) is configured to intermittently mesh with the sector gear (111); The pull rod (103) is fixedly connected to the transmission gear (104); A connecting column (105) is slidably disposed within the threaded rod (10) along the axial direction of the threaded rod (10), and the connecting column (105) is fixed to the pull rod (103); The plug rod (102) is fixed to the threaded rod (10), and the connecting column (105) is provided with a vertical groove, and the plug rod (102) is slidably disposed in the vertical groove; A spiral spring (101) is disposed at the connection between the threaded rod (10) and the second frame (5); The pull rod (103) is configured to be able to be pulled up to create a height difference between the transmission gear (104) and the sector gear (111), or to be lowered to bring the transmission gear (104) and the sector gear (111) into the same plane.

4. The lake sediment collection and nitrogen cycle research apparatus according to claim 2, characterized in that, The liquid storage box includes: The upper liquid storage frame (141) is fixedly connected to the support sleeve (15); The lower liquid storage frame (14) is rotatably connected to the upper liquid storage frame (141); the lower liquid storage frame (14) is fixed to the periphery of the stirring rod (13), and the spray pipe (142) passes through the lower liquid storage frame (14).

5. The lake sediment collection and nitrogen cycle research apparatus according to claim 1, characterized in that, The stirring rod (13) is hollow inside and is engaged and slidably connected to the sliding groove (112) opened on the vertical rod (11) by a slider (131) to realize synchronous rotation and relative axial sliding between the stirring rod (13) and the vertical rod (11).

6. The lake sediment collection and nitrogen cycle research apparatus according to claim 1, characterized in that, It also includes a sampling tube (4) which is disposed through the support plate (1) and has an opening at its top for corresponding to the bottom inlet of the temporary storage hopper (9).

7. The lake sediment collection and nitrogen cycle research apparatus according to claim 6, characterized in that, The bottom surface of the first frame (3) is slidably connected to the upper surface of the support plate (1) via a guide rail. The first frame (3) has a sampling position and a mixing position. At the sampling position, the temporary storage hopper (9) is located above the sampling tube (4) and is connected to the sampling tube (4); At the mixing position, the first frame (3) and the temporary storage hopper (9) are located inside the second frame (5), and the stirring rod (13) is located inside the temporary storage hopper (9).

8. The lake sediment collection and nitrogen cycle research apparatus according to claim 6, characterized in that, The sampling tube (4) and the support plate (1) are detachably connected.

9. The lake sediment collection and nitrogen cycle research apparatus according to claim 1, characterized in that, It also includes a gas collection system, which includes a sampling bottle (6), a flow meter (7) and a vacuum pump (8) connected in sequence by pipes. The sampling bottle (6) is connected to the interior of the second frame (5) by pipes.

10. The lake sediment collection and nitrogen cycle research apparatus according to claim 1, characterized in that, It also includes a plurality of support telescopic legs (2) disposed below the support plate (1), and an electric push rod for driving the support plate (1) to rise and fall relative to the support telescopic legs (2).

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