A flow detection cell and a system for multi-lane groundwater treatment, hydraulic control method

Abstract

The application provides a flow detection tank and a system for multi-channel groundwater treatment and a hydraulic control method. The flow detection tank comprises a flow detection cavity, a water inlet pipe and a collector. The bottom of the flow detection cavity is provided with a water outlet. The side wall of the flow detection cavity is provided with an overflow port. The collector is installed in the flow detection cavity, and the collection end of the collector is located between the water outlet and the overflow port. One end of the water inlet pipe is inserted into the flow detection cavity, and the end of the water inlet pipe in the flow detection cavity is lower than the collection end of the collector. By setting one end of the water inlet pipe in the flow detection tank to be lower than the collection end of the collector, the water flow of the water inlet pipe is prevented from directly impacting the collection end, the influence on the collector is avoided, the service life of the collector is improved, and long-time collection of water samples in multiple channels is adapted.

Description

Technical Field

[0001] This invention relates to a hydraulic control device and method, and more particularly to a flow detection pool and a multi-channel groundwater treatment system and hydraulic control method. Background Technology

[0002] Groundwater remediation requires multi-point monitoring, which is a significant workload. However, existing equipment can only perform single-channel sampling and monitoring, and cannot achieve multi-point sampling with a single analyzer. When multiple points need to be measured, multiple analyzers are required. Because these analyzers are expensive, their capabilities are not fully utilized when the required data variation is small, resulting in wasted costs. Furthermore, traditional methods involve numerous samplers and analyzers, occupying a large space and requiring dedicated analysis cabins, which places high demands on space.

[0003] In addition, groundwater remediation requires the use of testing pools to monitor groundwater quality. These pools are equipped with highly sensitive and precise sensors. These sensors are highly sensitive and cannot be directly flushed or rinsed, as this would lead to measurement deviations and affect the lifespan of the sensors. They often need to be recalibrated before they can be used, which would seriously affect the efficiency of multi-channel testing. Summary of the Invention

[0004] This invention provides a flow detection pool and a system for multi-channel groundwater treatment, as well as a hydraulic control method, to achieve effective collection of water samples from multiple channels.

[0005] The first aspect of the present invention provides a flow detection pool, the flow detection pool including a flow detection chamber, an inlet pipe, and a collector. The flow detection chamber has an outlet at its bottom and an overflow outlet on its side wall. The collector is installed inside the flow detection chamber, and the collecting end of the collector is located between the outlet and the overflow outlet. One end of the inlet pipe is inserted into the flow detection chamber, and the end of the inlet pipe inside the flow detection chamber is lower than the collecting end of the collector.

[0006] Furthermore, the flow detection pool also includes a flow equalization and water distribution device, which is installed inside the flow detection chamber. The flow equalization and water distribution device includes a flow equalization plate with a plurality of flow equalization and water distribution holes. One end of the water inlet pipe located inside the flow detection chamber is connected to the lower space of the flow equalization plate.

[0007] Furthermore, the water distribution device also includes a bottom spray plate, which is located below the water distribution plate and is connected to the water inlet pipe.

[0008] Furthermore, the spray direction of the bottom spray plate is downward.

[0009] Furthermore, the spray nozzles of the bottom spray plate are one-way check nozzles.

[0010] Furthermore, the lower surface of the bottom spray plate has a downward-curved structure.

[0011] Furthermore, the bottom of the flow detection chamber is funnel-shaped, and the outlet is located at the bottom of the funnel shape.

[0012] Furthermore, the bottom of the flow detection chamber is funnel-shaped, and the outlet is located at the bottom of the funnel shape.

[0013] The second aspect of the present invention also discloses a multi-channel groundwater treatment system using the above-mentioned flow detection pool, comprising several sampling structures, wherein each sampling structure includes a sampling area and a channel, the sampling area being connected to the inlet pipe of the flow detection pool via the channel, and a sampling solenoid valve being provided on the channel.

[0014] A third aspect of the present invention provides a hydraulic control method for multi-channel groundwater treatment, characterized in that the hydraulic control method includes a single-channel sampling process:

[0015] S101. Determine the channels that need to be sampled;

[0016] S102. Only open the sampling solenoid valve of the required sampling channel to clean the sampling area for the first unit of time;

[0017] S103. Close the vent valve and supply water to the sampling area for the second unit of time;

[0018] S104. Collect and analyze water samples from the sampling area within the second unit of time;

[0019] S105. After the second unit of time is completed, close the sampling solenoid valve and open the venting valve to release the water sample in the sampling area.

[0020] Furthermore, the hydraulic control method also includes a cyclic sampling process:

[0021] S201. Obtain the sampling command and determine the current sampling order of each channel;

[0022] S202. According to the sampling order, identify the sampling solenoid valve of the channel. If it matches the current channel in the sampling order, execute the single-channel sampling process.

[0023] S203. After completing the single-channel sampling process, repeat S202 according to the sampling order until the sampling of each channel in the sampling order is completed.

[0024] Furthermore, in S203, after completing the single-channel sampling process, S202 is repeated, and during the single-channel sampling process, the first unit time is changed to an interval time, and the interval time is greater than the first unit time.

[0025] Furthermore, S203. After completing the single-channel sampling process, S202 is repeated according to the sampling order until sampling of each channel in the sampling order is completed, including:

[0026] S2031. After completing the single-channel sampling process, repeat S202 according to the sampling order;

[0027] S2032. Determine the number of channels currently collected and match it with the number of channels in the sampling sequence. If the number of channels currently collected is not less than the number of channels in the sampling sequence, then the sampling of each channel in the sampling sequence is considered complete.

[0028] Furthermore, in step S202, the sampling solenoid valve of the channel is identified according to the sampling order. If it matches the current channel in the sampling order, the single-channel sampling process is executed, including:

[0029] S2021. Identify the sampling solenoid valves of the channels according to the sampling order;

[0030] S2022. According to the sampling order, name each channel sequentially as 1#, 2#, 3#, ..., n#;

[0031] S2023. Based on the sampling order, identify the sampling solenoid valve of the current sampling channel. If it matches the current channel in the sampling order, execute the single-channel sampling process.

[0032] Furthermore, the ratio of the first unit time to the second unit time is (1-3):3.

[0033] Furthermore, the first unit of time is 4-10 seconds.

[0034] Furthermore, the interval is 5-15 minutes.

[0035] Furthermore, it also includes a multi-channel groundwater treatment system, which includes a flow detection pool for collecting and analyzing water samples using a hydraulic control method. The flow detection pool is equipped with an inlet located at more than 3 / 4 of the total height of the flow detection pool, and the flow detection pool is connected to the sampling area through the inlet.

[0036] Furthermore, the bottom of the flow detection pool is funnel-shaped, and an outlet is provided at the bottom of the flow detection pool.

[0037] Compared to existing technologies, this invention avoids direct impact of water flow on the sampling end of the collector by placing one end of the inlet pipe in the flow detection pool below the sampling end. This minimizes the impact on the collector, extends its lifespan, and allows for long-term sampling of water samples from multiple channels. Furthermore, by placing one end of the inlet pipe below the sampling end, this invention creates a bottom-inlet structure. New water samples flow out from the bottom and rise under the influence of the water flow, enabling the collector to continuously acquire new water samples. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the flow detection cavity structure according to an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the water distribution device, water distribution plate, and bottom spray plate according to an embodiment of the present invention;

[0041] Figure 4 This is a flowchart illustrating the workflow of the single-channel analysis and sampling system according to an embodiment of the present invention.

[0042] Figure 5 This is a flowchart of the single analyzer rotation pretreatment sampling system according to an embodiment of the present invention.

[0043] 1. Flow detection chamber; 11. Outlet; 12. Overflow port; 2. Inlet pipe; 3. Collector; 4. Flow equalization and distribution device; 41. Flow equalization plate; 411. Flow equalization and distribution hole; 42. Bottom spray plate. Detailed Implementation

[0044] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0045] The first aspect of this invention provides a flow detection pool, such as... Figure 1 , Figure 2 As shown, the flow detection pool includes a flow detection chamber 1, an inlet pipe 2, and a collector 3. The flow detection chamber 1 has an outlet 11 at its bottom and an overflow port 12 on its side wall. The collector 3 is installed inside the flow detection chamber 1, and the collecting end of the collector 3 is located between the outlet 11 and the overflow port 12. One end of the inlet pipe 2 is inserted into the flow detection chamber 1, and the end of the inlet pipe 2 inside the flow detection chamber 1 is lower than the collecting end of the collector 3.

[0046] Among them, such as Figure 2As shown, the collector 3 is specifically a high-sensitivity, high-precision detection sensor. In this embodiment of the invention, the collector 3 includes a pH meter and an analyzer. The collection end of the collector 3 is specifically the end where the collector 3 detects the water sample. The flow detection pool adopts a high-side inlet and low-side outlet configuration, and the diameter of the outlet 11 is 1 / 4 to 1 / 3 larger than the diameter of the inlet pipe 2. The outlet 11 of the inlet pipe 2 is located in the flow detection chamber 1, and the inlet of the inlet pipe 2 is higher than the outlet 11 of the inlet pipe 2. This high-inlet, low-outlet arrangement in this embodiment of the invention can prevent the water sample from flowing back to the inlet end.

[0047] Specifically, the water inlet to the flow detection pool is guided into the flow pool through a water pipe, with the lowest point of the flow detection chamber 1 located at 1 / 4 of its height. This measure prevents splashing of the incoming water sample, which could contaminate the inner surface of the water sample in the flow pool, and also avoids fluctuations in the surface of the water sample.

[0048] In this embodiment of the invention, by setting one end of the inlet pipe 2 in the flow detection pool below the collection end of the collector 3, the water flow from the inlet pipe 2 is prevented from directly impacting the collection end, thus avoiding any impact on the collector 3 and extending its service life to accommodate long-term collection of water samples from multiple channels. Simultaneously, by setting one end of the inlet pipe 2 below the collection end of the collector 3, a bottom inlet structure is formed, allowing new water samples to flow out from the bottom and rise under the action of the water flow, enabling the collector 3 to continuously acquire new water samples.

[0049] Optional, such as Figure 3 As shown, the flow detection pool also includes a flow equalization and water distribution device 4, which is installed in the flow detection chamber 1. The flow equalization and water distribution device 4 includes a flow equalization plate 41, which is provided with a plurality of flow equalization and water distribution holes 411. One end of the water inlet pipe 2 located in the flow detection chamber 1 is connected to the lower space of the flow equalization plate 41.

[0050] The flow equalization plate 41 is equipped with flow equalization holes according to the fluid simulation model. The water supplied by the inlet pipe 2 flows upward and passes through the flow equalization holes of the flow equalization plate 41, so that the water sample is mixed evenly.

[0051] This embodiment of the invention includes a flow equalization and distribution plate. On one hand, it ensures uniform mixing of the water sample, leading to more accurate monitoring data and reducing the impact of direct water inflow on the probe of the detection instrument, thus minimizing the impact on equipment lifespan and monitoring accuracy. On the other hand, it prevents turbulent flow of the water sample, avoiding the impact of water flow fluctuations on the upper sidewall of the flow detection chamber 1, and effectively flushes the sidewall. Furthermore, the flow equalization plate 41 in this embodiment provides physical isolation between the upper and lower parts of the flow detection chamber 1, preventing foreign objects from falling from the upper part of the chamber (the collector 3 is a detachable structure, and there is a possibility of it falling due to unstable installation), thus blocking the lower drain port and isolating debris. Simultaneously, this embodiment of the invention adds a flow equalization and distribution device 4, which maintains the uniformity of the liquid output from the upper part. This measure accelerates the rapid entry of new samples for the current test, emptying the previous sample, ensuring that the new water sample is not affected by the previous water sample within the same water inflow time.

[0052] Specifically, the water distribution device 4 also includes a bottom spray plate 42, which is located below the water distribution plate 41 and is connected to the water inlet pipe 2.

[0053] Specifically, the spray direction of the bottom spray plate 42 is downward.

[0054] Specifically, the spray nozzle of the bottom spray plate 42 is a one-way check nozzle.

[0055] Among them, the one-way check nozzle is a one-way check variable diameter hole, which can facilitate the water flow to flush the wall and interior of the flow detection chamber 1, and increase the flushing pressure.

[0056] In particular, the lower surface of the bottom spray plate 42 is a downward-facing arc structure.

[0057] In this embodiment of the invention, the lower surface of the bottom spray plate 42 is a downward arc structure, which makes the water flow sprayed from the bottom spray plate 42 spread in a fan shape, effectively rinsing the bottom of the flow detection chamber 1 at a large angle.

[0058] Optionally, the bottom of the flow detection chamber 1 is funnel-shaped, and the outlet 11 is located at the bottom of the funnel shape.

[0059] The flow detection pool features a rounded bottom chamfer, which effectively prevents liquid accumulation and avoids liquid buildup in dead corners, ensuring smooth fluid discharge. At the same time, the rounded chamfer reduces turbulence caused by the fluid encountering an angle and also enhances the fluid's emptying speed.

[0060] Traditional flow-through detection cells typically have a flat bottom, which easily leads to the accumulation of water, silt, and other impurities, hindering the sampling of multiple samples. This invention addresses this by designing the flow-through detection cell with a funnel-shaped bottom, reducing the likelihood of water accumulation. Combined with the specific sampling process, this allows for thorough flushing of the previous water sample, minimizing interference from subsequent samples. Furthermore, traditional methods may generate air bubbles at the suction or inlet, or exhibit turbulence or laminar flow phenomena that affect measurement accuracy. The funnel-shaped design of this invention effectively mitigates turbulence and laminar flow. The liquid to be tested in this invention can directly clean the flow-through detection cell, flushing away residual liquid from the previous sampling and ensuring the authenticity of the tested liquid, eliminating the need for additional flushing equipment and water sources, and avoiding the introduction of new wastewater.

[0061] A second aspect of the present invention discloses a multi-channel groundwater treatment system using the above-mentioned flow detection pool, comprising several sampling structures, each sampling structure including a sampling area and a channel, wherein the sampling area is connected to the inlet pipe 2 of the flow detection pool through the channel, and a sampling solenoid valve is provided on the channel.

[0062] The third aspect of this invention provides a hydraulic control method for a multi-channel groundwater treatment system, such as... Figure 4 As shown, the hydraulic control method includes a single-channel sampling process:

[0063] S101. Determine the channels that need to be sampled;

[0064] The system can have n channels. In this embodiment, n is 6. However, in actual use, the channels can be expanded in conjunction with multi-port valves to achieve multi-channel detection in multiples of 6, such as 12 or 18 channels. (Note: It can be expanded infinitely in multiples of 6.)

[0065] S102. Only open the sampling solenoid valve of the required sampling channel to clean the sampling area for the first unit of time;

[0066] The structure of the embodiments of the present invention is as follows: Figure 4 As shown, during the detection process, it was found that the content at the end of the channel may vary due to different water samples. Therefore, in this embodiment of the invention, the water sample at the end of the channel is emptied by continuously releasing water for the first unit of time to avoid interference.

[0067] S103. Close the vent valve and supply water to the sampling area for the second unit of time;

[0068] Specifically, S103 also includes:

[0069] S1031. Before the first unit of time has ended, open the water supply channel of the sampling area;

[0070] S1032. After the first unit time, the bottom valve of the sampling area is not closed, and the water supply channel of the sampling area is opened and continued for the third unit time. In this embodiment of the invention, the third unit time overlaps with the first unit time and the second unit time. Increasing the water supply during this period can use the current water sample to flush the previous residual sample on the inner wall of the sampler, so as to ensure that the current sampling is not affected by the previous sample.

[0071] S1033. Before the end of the third unit of time, close the bottom valve of the sampling area, keep the water supply channel of the sampling area open, supply water to the sampling area, and continue for the second unit of time to allow the water sample in the channel to accumulate in the sampling area to realize the sampling process. When there is too much water sample entering the water, it can be returned to the original water supply sampling point through the outlet. The water sample is updated in real time while water is entering and leaving the water, thereby avoiding the overflow of the flow pool.

[0072] S104. Collect and analyze water samples in the sampling area after the end of the third unit of time and before the end of the second unit of time;

[0073] In this embodiment of the invention, the sampling time interval is precisely controlled. The bottom valve of the sampling device is open in the third unit of time. The water sample flushes the inner wall of the sampler. Because the bottom valve is open, water cannot be stored, so the sampling device cannot work. The bottom valve must be closed after the third unit of time is up. At this time, the water sample slowly rises. Only after reaching a certain liquid level can it submerge the sampling port of the analytical instrument, and the analytical instrument can collect and analyze the water sample.

[0074] S105. After the second unit of time is completed, close the sampling solenoid valve and open the venting valve to release the water sample in the sampling area.

[0075] Optionally, after sampling is completed, the water sample in the sampling area is emptied, so that the sampling area is in an empty state, which facilitates the next sampling of the channel.

[0076] Optionally, the ratio of the first unit time to the second unit time is (1-3):3.

[0077] Optionally, the first unit of time is 4-10 seconds.

[0078] Optionally, the third unit of time is 10-15 seconds.

[0079] This invention employs a single-channel sampling process, enabling the analyzer to automatically collect water samples from the corresponding channel as needed when connected to multiple channels, thus achieving multi-channel sampling by a single analyzer.

[0080] Optional, such as Figure 5 As shown, the hydraulic control method further includes a cyclic sampling process:

[0081] S201. Obtain the sampling command and determine the current sampling order of each channel;

[0082] In this embodiment of the invention, there are 6 channels, and the user can set a specific sampling order for each channel according to specific commands;

[0083] S202. According to the sampling order, identify the sampling solenoid valve of the channel. If it matches the current channel in the sampling order, execute the single-channel sampling process.

[0084] During the sampling process, channel identification is performed according to the sampling order. If the channel name matches the one that needs to be sampled, the sampling process is performed on that channel.

[0085] S203. After completing the single-channel sampling process, repeat S202 according to the sampling order until the sampling of each channel in the sampling order is completed.

[0086] This invention provides a cyclic sampling process, allowing staff to easily configure the order of each channel according to their needs, thus achieving sequential sampling.

[0087] Specifically, in S203, after completing the single-channel sampling process, S202 is repeated after a certain interval, and the first unit time is changed to the interval time during the single-channel sampling process.

[0088] Specifically, the interval time is greater than the first unit time, and the interval time is 25-30 minutes.

[0089] The interval time refers to the time it takes for the analyzer to analyze the sample. This time is not fixed and needs to be determined according to the requirements of each analyzer. For example, instruments using chemical analysis methods require an interval of 25-30 minutes (such as those analyzing chromium salts and arsenic salts). For some instruments that take real-time samples, the interval time can be shortened or even eliminated (such as pH meters, turbidimeters, and densitometers). Those skilled in the art can choose the interval time according to the specific situation of the analyzer. Therefore, the interval time is not a fixed value. In the present invention embodiment, the interval time is the interval time value of the chromium salt analyzer.

[0090] After water sample collection is completed, the analyzer needs time to analyze the water sample. Taking a chemical analyzer—chromium salt—as an example, the analyzer typically takes about 20 minutes to analyze the water sample. In actual work, those skilled in the art can customize or adjust the time according to the characteristics of the analyzer. During the water sample analysis process, sampling and analysis of the water flowing in the channel should be stopped.

[0091] Furthermore, by employing an interval time, the flushing time (third unit time) of the subsequent required water samples is extended, thereby minimizing interference from previous water samples.

[0092] Specifically, S203. After completing the single-channel sampling process, S202 is repeated according to the sampling order until sampling of each channel in the sampling order is completed, including:

[0093] S2031. After completing the single-channel sampling process, repeat S202 according to the sampling order;

[0094] S2032. Determine the number of channels currently collected and match it with the number of channels in the sampling sequence. If the number of channels currently collected is not less than the number of channels in the sampling sequence, then the sampling of each channel in the sampling sequence is considered complete.

[0095] If the number of channels in the sampling sequence is 6, the number of channels already collected will be verified during the sampling process. If the number of channels already collected is less than the number of channels in the sampling sequence after the sampling sequence has been completed, it indicates that an error has occurred in the current sampling process, and verification can be performed through alarms or other means.

[0096] This invention employs S2032 to re-verify the sampling process, which facilitates timely review by staff if any missed detections occur during the testing process.

[0097] Specifically, in step S202, the sampling solenoid valve of the channel is identified according to the sampling order. If it matches the current channel in the sampling order, the single-channel sampling process is executed, including:

[0098] S2021. Identify the sampling solenoid valves of the channels according to the sampling order;

[0099] S2022. According to the sampling order, name each channel sequentially as 1#, 2#, 3#, ..., n#;

[0100] S2023. Based on the sampling order, identify the sampling solenoid valve of the current sampling channel. If it matches the current channel in the sampling order, execute the single-channel sampling process.

[0101] The embodiments of the present invention are based on a cyclic sampling process to achieve cyclic sampling of a multi-channel groundwater treatment system.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that after reading this application specification, they can still modify or make equivalent substitutions to the specific implementation of the present invention, but these modifications or changes do not depart from the protection scope of the pending claims of the present invention.

Claims

1. A flow detection pool, characterized in that, The flow detection pool includes a flow detection chamber, an inlet pipe, and a collector. The flow detection chamber has an outlet at its bottom and an overflow outlet on its side wall. The collector is installed inside the flow detection chamber, with its collection end located between the outlet and the overflow outlet. One end of the inlet pipe is inserted into the flow detection chamber, and the end of the inlet pipe inside the flow detection chamber is lower than the collection end of the collector. The flow detection pool also includes a flow equalization and distribution device installed inside the flow detection chamber. The flow equalization and distribution device includes a flow equalization plate with several flow equalization and distribution holes. The end of the inlet pipe inside the flow detection chamber is connected to the lower space of the flow equalization plate. The flow equalization and distribution device also includes a bottom spray plate with the spray direction downwards.

2. The flow detection pool according to claim 1, characterized in that, The bottom spray plate is located below the flow equalization plate, and the bottom spray plate is connected to the water inlet pipe.

3. The flow detection pool according to claim 2, characterized in that, The spray nozzles of the bottom spray plate are one-way check nozzles.

4. The flow detection pool according to claim 3, characterized in that, The lower surface of the bottom spray plate has a downward-facing arc structure.

5. A multi-channel groundwater treatment system employing the flow detection pool described in any one of claims 1-4, characterized in that, The system includes several sampling structures, each including a sampling area and a channel. The sampling area is connected to the inlet pipe of the flow detection pool through the channel, and a sampling solenoid valve is provided on the channel.

6. A hydraulic control method using the multi-channel groundwater treatment system of claim 5, characterized in that, The hydraulic control method includes a single-channel sampling process: S101. Determine the channels that need to be sampled; S102. Open the sampling solenoid valve of the channel to be sampled, clean the sampling area, and continue for the first unit of time; S103. Close the vent valve and supply water to the sampling area for the second unit of time; S104. Collect and analyze water samples from the sampling area within the second unit of time; S105. After the second unit of time is completed, close the sampling solenoid valve and open the venting valve to release the water sample in the sampling area.

7. The hydraulic control method according to claim 6, characterized in that, The hydraulic control method also includes a cyclic sampling process: S201. Obtain the sampling command and determine the current sampling order of each channel; S202. According to the sampling order, identify the sampling solenoid valve of the channel. If it matches the current channel in the sampling order, execute the single-channel sampling process. S203. After completing the single-channel sampling process, repeat S202 according to the sampling order until the sampling of each channel in the sampling order is completed.

8. The hydraulic control method according to claim 7, characterized in that, In S203, after completing the single-channel sampling process, S202 is repeated, and during the single-channel sampling process, the first unit time is changed to the sampling interval time, and the interval time is greater than the first unit time. The ratio of the first unit time to the second unit time is (1-3):

3.

9. The hydraulic control method according to claim 8, characterized in that, S203. After completing the single-channel sampling process, S202 is repeated according to the sampling order until sampling of each channel in the sampling order is completed, including: S2031. After completing the single-channel sampling process, repeat S202 according to the sampling order; S2032. Determine the current number of channels that have been collected and match it with the number of channels in the sampling sequence. If the current number of channels that have been collected is not less than the number of channels in the sampling sequence, then it is considered that one cycle of sampling of each channel in the sampling sequence has been completed.

10. The hydraulic control method according to claim 9, characterized in that, S202. According to the sampling order, the sampling solenoid valve of the channel is identified. If it matches the current channel in the sampling order, the single-channel sampling process is executed, including: S2021. Identify the sampling solenoid valves of the channels according to the sampling order; S2022. According to the sampling order, name each channel sequentially as 1#, 2#, 3#, ..., n#; S2023. Based on the sampling order, identify the sampling solenoid valve of the current sampling channel. If it matches the current channel in the sampling order, execute the single-channel sampling process.

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