A soil underground leachate collecting device suitable for heavy metal output flux calculation

Abstract

The utility model relates to the field of agricultural land soil heavy metal pollution monitoring technology discloses a soil underground percolate collection device suitable for heavy metal output flux calculation, which comprises a catchment plate inserted into soil, a catchment pipe buried in soil, a water storage tank and a vertical pipe, one end of the catchment pipe is in communication with the catchment plate, a liquid level sensing assembly is arranged in the water storage tank, the liquid level sensing assembly comprises a float ball type liquid level switch, the float ball type liquid level switch is arranged in the water storage tank, the float ball on the float ball type liquid level switch floats within a range from 1 / 3 height to 2 / 3 height of the highest liquid level of the water storage tank, and the upper half of the vertical pipe is located above the soil. The utility model can ensure that the minimum volume of water in the water storage tank is 500ml, can meet the sample volume of heavy metal detection, the catchment plate is designed in a wedge shape, can be directly inserted into soil from the soil profile, does not disturb the soil above the catchment plate, and the data authenticity is improved.

Description

Technical Field

[0001] This utility model relates to the field of heavy metal pollution monitoring technology in agricultural land soil, and in particular to a soil groundwater leachate collection device suitable for calculating heavy metal output flux. Background Technology

[0002] Currently, the prevention and control of heavy metal pollution in arable land is a crucial foundation for supporting Healthy China, rural revitalization, and ecological civilization construction. Various regions are actively carrying out projects to investigate the causes of heavy metal pollution in soil. Subsurface infiltration is a vital component in calculating its output flux, and accurate monitoring is fundamental to accurate causal identification. Traditional leachate collection methods primarily rely on passive infiltration devices, which use buried water collection structures (such as perforated plates or drainage pipes) to guide leachate into storage containers. Samples are then periodically extracted manually for volume measurement and heavy metal concentration analysis. However, this method has revealed the following significant shortcomings in long-term field monitoring.

[0003] Regarding the aforementioned related technologies, the inventor believes that the following defects exist:

[0004] 1. Existing equipment's water storage tanks are prone to overflow during the rainy season or in high-permeability areas due to rapid leachate accumulation. This results in incomplete recording of the actual leachate volume during the monitoring period, leading to significant deviations in the calculation of total heavy metal content. Furthermore, manual sampling is limited by cost and timeliness, making it difficult to achieve a dynamic balance.

[0005] 2. The traditional process of pre-burying water collection boards requires disturbing the original soil, resulting in discrepancies between the monitoring data and the actual situation. Summary of the Invention

[0006] To address the technical problems mentioned above, this utility model provides a soil groundwater leachate collection device suitable for calculating heavy metal output flux.

[0007] This utility model is achieved by the following technical solution: a soil underground leachate collection device suitable for calculating heavy metal output flux, comprising: a water collection plate inserted into the soil, a water collection pipe buried in the soil, a water storage tank and a riser, wherein one end of the water collection pipe is connected to the water collection plate;

[0008] The water storage tank is equipped with a liquid level sensing component, which includes a float-type liquid level switch. The float-type liquid level switch is installed inside the water storage tank, and the float on the float-type liquid level switch floats between 1 / 3 and 2 / 3 of the height of the highest liquid level in the water storage tank.

[0009] The upper half of the riser is located above the soil, and the bottom end of the riser is connected to the top of the float-type liquid level switch by a thread. The bottom end of the riser is connected to the top of the float-type liquid level switch.

[0010] The top of the riser is connected to a waterproof box via a thread, and the top of the riser is connected to the bottom of the waterproof box. The waterproof box is equipped with a flow meter and a micro water pump.

[0011] The drain pipe is installed inside the water storage tank. The top of the drain pipe passes through the riser and extends into the waterproof box to connect with the micro water pump. The flow meter is installed on the waterproof box.

[0012] The waterproof tank is equipped with a relay, and a wire is connected to the relay. The wire passes through the riser and extends into the water storage tank to connect with a float-type liquid level switch.

[0013] The waterproof box contains a battery, which is electrically connected to a relay, a micro water pump, and a flow meter via wires.

[0014] As a further improvement to the above solution, the water collection plate is wedge-shaped, made of 304 stainless steel, 400mm long, 400mm wide, and 40mm high (thickest part). The water collection plate has multiple 3mm holes symmetrically opened on it. The top of the water collection plate is wrapped with geotextile, and the hole diameter is ≤0.5mm. The outer wall of the thickest part of the water collection plate is provided with a quick-connect interface for connecting to the water collection pipe.

[0015] The drainage board has holes for easy water collection, and wrapping it with geotextile can prevent the drainage holes from being blocked. The drainage board is inserted into the soil at an angle of about 5° from the soil profile.

[0016] As a further improvement to the above solution, both the water collection pipe and the water storage tank are made of high-density polyethylene material. The water storage tank is 100mm long, 100mm wide, and 150mm high, with a maximum water storage capacity of 1.5L.

[0017] The water collection pipe 2 is used to guide the water in the water collection plate into the water storage tank. The water collection pipe and water storage tank are made of high-density polyethylene material, which can prevent the water collection pipe and water storage tank from being flattened by the soil.

[0018] As a further improvement to the above solution, the slide rail of the float-type liquid level switch is 50mm long, vertically placed inside the water storage tank, with the bottom located at 50mm above the height of the water storage tank and the top located at 100mm above the height of the water storage tank.

[0019] When the liquid level in the water tank is higher than 100mm, the float switch sends a signal to the relay, which controls the micro water pump to start draining the water. When the liquid level drops below 50mm, the float switch sends a signal to the relay, which controls the micro water pump to shut down. This logic allows the maximum water storage capacity in the water tank to be 1000ml and the minimum water storage capacity to be 500ml.

[0020] As a further improvement to the above solution, the riser is 500mm long and 50mm in diameter, and is made of high-density polyethylene material.

[0021] Riser pipes made of high-density polyethylene can be protected from being crushed by soil and are used to protect drainage pipes and electrical wires.

[0022] As a further improvement to the above solution, the drain pipe is a PVC flexible hose with a diameter of 8mm, and a copper counterweight is provided at the end of the drain pipe extending to the water storage tank. The counterweight weighs ≥50g.

[0023] The copper counterweight ensures that the hose is always at the bottom of the water tank. The hose goes through the riser into the waterproof tank and is connected to the flow meter and the miniature water pump. Its function is to drain the water from the water tank.

[0024] As a further improvement to the above solution, the waterproof box is made of PVC material, and a top cover is hinged to the top of the waterproof box, and the waterproof box and the top cover are sealed by a silicone sealing ring.

[0025] The waterproof box, made of PVC, protects internal components such as the battery, flow meter, and miniature water pump from rain. The top cover allows for easy access to flow meter data and battery replacement.

[0026] As a further improvement to the above solution, the relay operates at a voltage of 12V, the battery voltage is 12.8V, and the current is 6Ah.

[0027] The relay is connected to the float switch, the miniature water pump, and the battery via wires. The float switch sends a signal to the relay, which controls the miniature water pump to turn on and off. The battery can charge other components and power the entire system.

[0028] As a further improvement to the above solution, the flow meter operates at 12V and has a display screen for displaying the cumulative flow.

[0029] As a further improvement to the above solution, the micro water pump operates at a voltage of 12V.

[0030] A miniature water pump is installed to drain the water from the storage tank.

[0031] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0032] This invention ensures that the minimum volume of water in the storage tank is 500ml, which can meet the sample volume requirements for heavy metal detection. Furthermore, the water collection plate is designed in a wedge shape, allowing it to be directly inserted into the soil profile without disturbing the soil above the water collection plate, thus increasing the accuracy of the data. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of this utility model;

[0034] Figure 2 This is a schematic diagram of the assembly of the upright pipe and the waterproof box in this utility model;

[0035] Figure 3 This is a schematic diagram of the assembly of the drain pipe and the copper counterweight in this utility model.

[0036] Explanation of key symbols:

[0037] 1. Water collection plate; 2. Water collection pipe; 3. Water storage tank; 4. Float-type liquid level switch; 5. Riser; 6. Drain pipe; 7. Waterproof tank; 8. Relay; 9. Battery; 10. Flow meter; 11. Miniature water pump. Detailed Implementation

[0038] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0039] Please combine Figure 1 The soil groundwater leachate collection device applicable to the calculation of heavy metal output flux in this embodiment includes: a water collection plate 1 inserted into the soil, a water collection pipe 2 buried in the soil, a water storage tank 3 and a riser 5, one end of the water collection pipe 2 being connected to the water collection plate 1.

[0040] The water storage tank 3 is equipped with a liquid level sensing component, which includes a float-type liquid level switch 4. The float-type liquid level switch 4 is installed inside the water storage tank 3, and the float on the float-type liquid level switch 4 floats between 1 / 3 and 2 / 3 of the height of the highest liquid level in the water storage tank 3.

[0041] The upper half of the riser 5 is located above the soil, and the bottom end of the riser 5 is connected to the top of the float-type liquid level switch 4 by a thread. The bottom end of the riser 5 is connected to the top of the float-type liquid level switch 4.

[0042] The top end of the riser 5 is connected to a waterproof box 7 by a thread, and the top end of the riser 5 is connected to the bottom of the waterproof box 7. The waterproof box 7 is equipped with a flow meter 10 and a micro water pump 11.

[0043] The drain pipe 6 is installed inside the water storage tank 3. The top end of the drain pipe 6 passes through the riser 5 and extends into the waterproof box 7 to connect with the micro water pump 11. The flow meter 10 is installed on the waterproof box 7.

[0044] The waterproof tank 7 is equipped with a relay 8, and a wire is connected to the relay 8. The wire passes through the riser 5 and extends into the water storage tank 3 to connect with the float-type liquid level switch 4.

[0045] The waterproof box 7 contains a battery 9, which is electrically connected to a relay 8, a micro water pump 11, and a flow meter 10 via wires.

[0046] The water collection plate 1 is wedge-shaped, made of 304 stainless steel, 400mm long, 400mm wide, and 40mm high (thickest part). The water collection plate 1 has multiple 3mm holes symmetrically opened on it. The top of the water collection plate 1 is wrapped with geotextile, and the hole diameter is ≤0.5mm. The outer wall of the thickest part of the water collection plate 1 is provided with a quick-connect interface, which is used to connect to the water collection pipe 2.

[0047] The water collection plate 1 has holes for easy water collection, and wrapping it with geotextile can prevent the water collection holes from being blocked. The water collection plate 1 is inserted into the soil at an angle of about 5° from the soil profile.

[0048] Both the water collection pipe 2 and the water storage tank 3 are made of high-density polyethylene material. The water storage tank 3 is 100mm long, 100mm wide, and 150mm high, with a maximum water storage capacity of 1.5L.

[0049] The water collection pipe 2 is used to guide the water in the water collection plate 1 into the water storage tank 3. The water collection pipe 2 and the water storage tank 3 are made of high-density polyethylene material, which can prevent the water collection pipe 2 and the water storage tank 3 from being flattened by the soil.

[0050] The slide rail of the float-type liquid level switch 4 is 50mm long and is placed vertically inside the water storage tank 3. The bottom is located at a height of 50mm in the water storage tank 3, and the top is located at a height of 100mm in the water storage tank 3.

[0051] When the liquid level in the water tank 3 is higher than 100mm, the float switch sends a signal to the relay 8, which controls the micro water pump 11 to start draining the water. When the liquid level drops below 50mm, the float switch sends a signal to the relay 8, which controls the micro water pump 11 to shut down. This logic allows the water tank 3 to have a maximum storage capacity of 1000ml and a minimum storage capacity of 500ml.

[0052] The riser 5 is 500mm long and 50mm in diameter, and is made of high-density polyethylene material.

[0053] The riser 5, made of high-density polyethylene material, is protected from being crushed by soil. The riser 5 is used to protect the drainage pipe 6 and the wires.

[0054] The drain pipe 6 is a PVC flexible hose with a diameter of 8mm. A copper counterweight is provided at the end of the drain pipe 6 extending to the water storage tank 3. The counterweight weighs ≥50g.

[0055] The copper counterweight ensures that the hose is always at the bottom of the water tank 3. The hose passes through the riser 5 from the water tank 3 and enters the waterproof tank 7, which is connected to the flow meter 10 and the micro water pump 11. Its function is to drain the water in the water tank 3.

[0056] The waterproof box 7 is made of PVC material, and a top cover is hinged to the top of the waterproof box 7. The waterproof box 7 and the top cover are sealed with a silicone sealing ring.

[0057] The waterproof box 7 is made of PVC material to protect the internal components such as the battery 9, flow meter 10, and miniature water pump 11 from rain. The top cover can be opened to facilitate viewing the data set of the flow meter 10 and replacing the battery 9.

[0058] The relay 8 operates at 12V, and the battery 9 operates at 12.8V with a current of 6Ah.

[0059] Relay 8 is connected to float switch, micro water pump 11 and battery 9 via wires. Float switch sends a signal to relay 8, which controls the micro water pump 11 to turn on and off. Battery 9 can charge other components and power the entire system.

[0060] The flow meter 10 operates at 12V and has a display screen for displaying the cumulative flow.

[0061] The operating voltage of the micro water pump 11 is 12V.

[0062] The function of the miniature water pump 11 is to drain the water in the water storage tank 3.

[0063] With the cooperation of float-type liquid level switch 4, drain pipe 6, relay 8, battery 9, flow meter 10 and micro water pump 11, the minimum volume of water in water tank 3 can be guaranteed to be 500ml, which can meet the sample volume requirements for heavy metal detection. In addition, the water collection plate 1 is designed in a wedge shape, which can be directly inserted into the soil from the soil profile without disturbing the soil above the water collection plate 1, thus increasing the authenticity of the data.

[0064] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A soil groundwater leachate collection device suitable for calculating heavy metal output flux, characterized in that, include: A water collection plate inserted into the soil, a water collection pipe buried in the soil, a water storage tank and a riser, wherein one end of the water collection pipe is connected to the water collection plate; The water storage tank is equipped with a liquid level sensing component, which includes a float-type liquid level switch. The float-type liquid level switch is installed inside the water storage tank, and the float on the float-type liquid level switch floats between 1 / 3 and 2 / 3 of the height of the highest liquid level in the water storage tank. The upper half of the riser is located above the soil, and the bottom end of the riser is connected to the top of the float-type liquid level switch by a thread. The bottom end of the riser is connected to the top of the float-type liquid level switch. The top of the riser is connected to a waterproof box via a thread, and the top of the riser is connected to the bottom of the waterproof box. The waterproof box is equipped with a flow meter and a micro water pump. The drain pipe is installed inside the water storage tank. The top of the drain pipe passes through the riser and extends into the waterproof box to connect with the micro water pump. The flow meter is installed on the waterproof box. The waterproof tank is equipped with a relay, and a wire is connected to the relay. The wire passes through the riser and extends into the water storage tank to connect with a float-type liquid level switch. The waterproof box contains a battery, which is electrically connected to a relay, a micro water pump, and a flow meter via wires.

2. The soil groundwater leachate collection device for calculating heavy metal output flux as described in claim 1, characterized in that, The water collection plate is wedge-shaped, made of 304 stainless steel, and is 400mm long, 400mm wide, and 40mm high (thickest part). The water collection plate has multiple 3mm holes symmetrically opened on it. The top of the water collection plate is wrapped with geotextile, and the hole diameter is ≤0.5mm. The outer wall of the thickest part of the water collection plate is provided with a quick-connect interface for connecting to the water collection pipe.

3. The soil groundwater leachate collection device for calculating heavy metal output flux as described in claim 1, characterized in that, Both the water collection pipe and the water storage tank are made of high-density polyethylene material. The water storage tank is 100mm long, 100mm wide, and 150mm high, with a maximum water storage capacity of 1.5L.

4. The soil groundwater leachate collection device for calculating heavy metal output flux as described in claim 1, characterized in that, The slide rail of the float-type liquid level switch is 50mm long and is placed vertically inside the water storage tank. The bottom is located at a height of 50mm in the water storage tank, and the top is located at a height of 100mm in the water storage tank.

5. The soil groundwater leachate collection device for calculating heavy metal output flux as described in claim 1, characterized in that, The riser is 500mm long and 50mm in diameter, and is made of high-density polyethylene material.

6. The soil groundwater leachate collection device for calculating heavy metal output flux as described in claim 1, characterized in that, The drain pipe is a PVC flexible hose with a diameter of 8mm. A copper counterweight is provided at the end of the drain pipe that extends to the water storage tank. The counterweight weighs ≥50g.

7. The soil groundwater leachate collection device for calculating heavy metal output flux as described in claim 1, characterized in that, The waterproof box is made of PVC material, and a top cover is hinged to the top of the waterproof box. The waterproof box and the top cover are sealed with a silicone sealing ring.

8. The soil groundwater leachate collection device for calculating heavy metal output flux as described in claim 1, characterized in that, The relay operates at 12V, and the battery has a voltage of 12.8V and a current of 6Ah.

9. The soil groundwater leachate collection device for calculating heavy metal output flux as described in claim 1, characterized in that, The flow meter operates at 12V and has a display screen for showing the cumulative flow.

10. The soil groundwater leachate collection device for calculating heavy metal output flux as described in claim 1, characterized in that, The micro water pump operates at 12V.

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