Water quality sampling in-situ automatic packaging system

Abstract

The present application belongs to the field of environmental monitoring technology, and discloses a kind of water quality sampling in-situ automatic packaging system, including sampling box and box cover, rotary water segregator, sampling bottle, composite sampling needle, fan, electromagnetic flowmeter and control module.Sampling box is equipped with sampling bottle of built-in fixing agent.In ball screw drive composite sampling needle drops through the split bottle cap with elastic plastic sealing film and fixing agent module, and through electromagnetic flowmeter accurate measurement injection water sample;When composite sampling needle rises, its two sides first and second stop valve are disconnected with elastic plastic sealing film in turn, so that the split bottle cap two sides stagger back and seal.Control module not only controls single water sampling volume, but also receives external main pipe network flowmeter data, realizes advanced dynamic sampling trigger strategy based on pollution cumulative amount, flow ratio and abnormal flow mutation.The present application realizes the full-automatic synchronization of sampling, fixing and sealing, solves the defects of low sample fidelity and inability to capture abnormal pollution events.

Description

Technical Field

[0001] This invention belongs to the field of environmental monitoring technology, specifically relating to an in-situ automatic packaging system for water quality sampling. Background Technology

[0002] In environmental monitoring and enterprise wastewater discharge management, water quality sampling is the core step in obtaining water quality data. Currently, most existing equipment in the industry can only collect samples on a timed and quantitative basis, and cannot perform a series of operations such as fixing, preserving, and sealing them fully automatically; a patent database search also did not find any patents that are the same as or similar to this project.

[0003] However, in the process of realizing this invention, the inventors discovered at least the following problems in the prior art:

[0004] 1. Existing technology cannot preserve samples in a timely manner, which makes the physicochemical properties of the samples easily change and the sample fidelity is low;

[0005] 2. Existing technologies typically rely on rigid timed sampling, which cannot automatically sample and save samples based on the size of the enterprise's wastewater discharge. They cannot capture the patterns of enterprise wastewater discharge and are even less able to respond to sudden illegal discharge incidents.

[0006] 3. Existing technologies and products involve a lot of human intervention during sampling (including drug fixation, packaging, etc.), resulting in significant errors. Summary of the Invention

[0007] The present invention aims to at least partially solve the aforementioned technical problems. Therefore, the present invention aims to provide an in-situ automatic sealing system for water quality sampling, achieving fully automated sampling, fixation, and self-sealing.

[0008] The technical solution adopted in this invention is as follows:

[0009] An in-situ automatic water sampling and packaging system includes: a sampling box cover, a rotary distributor, a sampling box, sampling bottles, a water sample collection pool, a sampling arm, a composite sampling needle, a blower, and an electromagnetic flow meter. The sampling box has a sampling box cover on top, and the rotary distributor is located inside the sampling box cover. The sampling arm is connected to the rotary distributor and is telescopic. The composite sampling needle is mounted on the sampling arm. A sampling tube is connected to the outside of the sampling box cover, and the electromagnetic flow meter is located at the connection between the sampling tube and the outside of the sampling box cover. Multiple sampling bottles are arranged inside the sampling box, and the caps of the sampling bottles are cracked. The sample bottle has a split cap with an elastic sealing film at its center. A fixative module is located inside the sample bottle. The composite sampling needle has a ball screw module for driving its vertical movement and a fluid flow path. A first and a second stop valve are respectively located on both sides of the composite sampling needle. When the composite sampling needle descends, it passes through the elastic sealing film, punctures the fixative module, and injects a water sample. The amount of injected water is measured by an electromagnetic flowmeter. When it rises, the first and second stop valves are configured to lift the elastic sealing film and disconnect from it sequentially at a preset time difference, thereby achieving self-sealing of the split cap.

[0010] As a further technical solution of the present invention, when the first lifting valve is disconnected from the elastic sealing film, one side of the cracked bottle cap descends first; when the second lifting valve is disconnected from the elastic sealing film, the other side of the cracked bottle cap descends subsequently; the opposite sides of the cracked bottle cap form a closed sealing structure with alternating upper and lower layers under the restoring force of the elastic sealing film, so as to expel residual air and complete physical self-locking.

[0011] As a further technical solution of the present invention, it also includes a control module, which is communicatively connected to the electromagnetic flowmeter, the rotary distributor and the ball screw module; the control module is used to control the injection volume of a single sampling based on the reading of the electromagnetic flowmeter; and the control module is also configured to receive the sewage flow data stream sent by the external main pipeline flowmeter and trigger the advanced sampling strategy action accordingly.

[0012] As a further technical solution of the present invention, the control module is equipped with an advanced sampling strategy, including: a flow accumulation trigger sampling strategy, that is, continuously accumulating the sewage flow data of the main pipeline flow meter, and automatically triggering a sampling system action whenever the accumulated sewage flow reaches a preset volume threshold; and a flow ratio sampling strategy, that is, dynamically adjusting the sampling frequency of the system according to the real-time sewage flow monitored by the main pipeline flow meter, increasing the sampling frequency when the sewage flow is large and decreasing the frequency when the flow is small, so as to obtain a mixed sample representing the average water quality of the entire discharge cycle.

[0013] As a further technical solution of the present invention, the advanced sampling strategy built into the control module also includes: a flow abnormality event triggered sampling strategy, that is, monitoring the rate of change of the main pipeline flow meter data, and when the rate of change of the sewage flow instantaneously increases or decreases exceeds the set abnormal threshold, the system immediately triggers an emergency sampling action to capture key sewage discharge events such as abnormal operating conditions or illegal discharge.

[0014] As a further technical solution of the present invention, the water sample collection pool is located at the center inside the sampling box and is used to hold the mixed sample; a plurality of sampling bottles are distributed in an inner and outer ring around the water sample collection pool; the sampling arm is aligned with the water sample collection pool or the sampling bottles in the inner and outer rings by means of telescopic and rotational cooperation. Preferably, the inner ring and the outer ring each contain 12 sampling bottles.

[0015] As a further technical solution of the present invention, the sampling box is equipped with a fan; after a single water injection is completed, the fan draws clean air to back-blow the composite sampling needle and the internal flow path of the sampling tube to clean the pipeline and prevent cross-contamination of different samples.

[0016] As a further technical solution of the present invention, a filter is provided at the end of the sampling tube; a refrigeration unit is provided on one side of the sampling box; and four pulleys are provided at the four corners of the bottom of the sampling box.

[0017] The beneficial effects of this invention are as follows:

[0018] This invention utilizes a ball screw module to drive a composite sampling needle to pierce and inject the sample, instantly destroying the fixative module during water collection. This achieves one-step sampling and fixative addition, eliminating manual intervention and significantly improving sample fidelity. A slight time difference between the sequential disconnection of the first and second stop valves causes the bottle cap and elastic sealing film to fall back in an overlapping manner, effectively squeezing out residual air and achieving a tight mechanical self-locking seal. A central water sample collection pool holds the mixed water sample throughout the entire cycle, and a telescopic sampling arm is designed to flexibly align the central pool with the inner and outer sampling bottles. After each sampling, a built-in fan draws clean air to backflush the pipeline, eliminating the complexity of water washing and thoroughly achieving cleanliness to prevent cross-contamination.

[0019] This invention utilizes the electromagnetic flowmeter on its own equipment to precisely control the water volume of a single bottle; at the same time, it connects to the enterprise's main pipeline flowmeter through an external interface to realize an advanced sampling strategy based on the actual discharge volume of the pipeline (cumulative triggering, proportional and other frequency adjustments) and abnormal discharge (sudden change triggering), perfectly capturing the enterprise's emission patterns and violations. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall system structure of the present invention.

[0021] Figure 2 This is a schematic diagram showing the location of the electromagnetic flowmeter of the present invention.

[0022] Figure 3 This is a schematic diagram of the composite sampling needle of the present invention.

[0023] Figure 4 This is a schematic diagram of the sampling bottle of the present invention.

[0024] Figure 5 This is a schematic diagram of the elastic sealing film of the present invention. Detailed Implementation

[0025] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] like Figures 1 to 5 As shown, an in-situ automatic water sampling and sealing system according to this embodiment includes: a sampling box cover 1, a rotary water distributor 2, a sampling box 3, a sampling bottle 4, a water sample collection pool 5, a sampling arm 6 with a sealing telescopic structure, a composite sampling needle 7, a refrigerator 8, a pulley 9, a sampling tube 10, a filter 11, an electromagnetic flowmeter 12, a ball screw module 13, a fluid flow path 14, a first stop valve 15, a second stop valve 16, a fixative module 17, a crack-type bottle cap 18, an elastic sealing film 19, and a control module (not shown independently in the figure, but located in the equipment's electrical control cabinet).

[0027] The sampling box 3 has a central water sample collection pool 5 for holding mixed samples; 12 sample bottles 4 are arranged in inner and outer rings. Four casters 9 are installed at the four corners of the bottom of the sampling box 3 for easy movement, and a refrigeration unit 8 is located on the side to maintain sample cold storage and preservation. A rotating water separator 2 inside the box lid 1 drives a sampling arm 6 with a composite sampling needle 7 to perform planar rotation and positioning. Combined with the linear extension and retraction of the sampling arm 6, it can align with the central water sample collection pool 5 and the inner and outer rings of sample bottles 4. Figure 1 and Figure 2 As shown, an electromagnetic flowmeter 12 is installed at the connection between the sampling tube 10 and the outer side of the sampling box cover 1. The water sample to be tested is input into the system through the filter 11, the sampling tube 10, and the electromagnetic flowmeter 12. Figure 3As shown, the composite sampling needle 7 is equipped with a ball screw module 13 for up-and-down driving and a fluid flow path 14 for water inlet. Specifically, the upper end of the ball screw module 13 is connected to the sampling arm 6, and the free end of the ball screw module 13 is installed inside the composite sampling needle 7; the fluid flow path 14 is connected to the front outlet of the composite sampling needle 7; a first stop valve 15 and a second stop valve 16 are provided on both sides of the outside of the composite sampling needle 7. Figure 4 As shown, the cap of sampling bottle 4 adopts a self-sealing structure composed of a split cap 18, as... Figure 5 As shown, the center crack of the bottle cap 18 is covered with an elastic plastic sealing film 19, and a fixative module 17 is placed inside the sampling bottle 4.

[0028] The in-situ quantitative sampling and automated packaging process is as follows:

[0029] When the sampling command is executed, the rotating water distributor 2 positions the composite sampling needle 7 above the target sampling bottle 4. The ball screw module 13 drives the composite sampling needle 7 to descend, forcefully penetrating the elastic sealing film 19 after squeezing open the opposite sides of the cracked bottle cap 18, and simultaneously puncturing the fixative module 17 inside the bottle. Subsequently, the system injects water sample into the bottle through the fluid flow path 14. The specific injection volume (e.g., 500 ml) is precisely measured and feedback is cut off by the electromagnetic flow meter 12 installed at the sampling tube 10.

[0030] After water injection is complete, the ball screw module 13 drives the composite sampling needle 7 to rise. At this time, the first and second lifting valves 15 and 16 on both sides hook onto the elastic sealing film 19 and pull it upward at the cracked part of the bottle cap 18. As the composite sampling needle 7 continues to be pulled out, the first lifting valve 15 disconnects from the elastic sealing film 19 first, and one side of the cracked bottle cap 18 falls back down (as shown in the image). Figure 5 (As shown by the dashed line on one side, where the dashed line is for perspective effect); immediately afterward, the second stop valve 16 disconnects from the elastic sealing film 19, and the other side of the split bottle cap 18 falls back and rests on the edge of the first-fallen split bottle cap 18. This time difference facilitates a self-sealing closure with overlapping layers, preventing air leakage. After water filling is complete, the system controls the fan to start, drawing clean air to backflush the internal flow path of the composite sampling needle 7 and sampling tube 10, achieving the purpose of cleaning the composite sampling needle 7 and sampling tube, and preventing cross-contamination during the next sampling.

[0031] This system logically distinguishes between sensor sources for single-quantitative measurements and macroscopic triggering. The control module utilizes the electromagnetic flowmeter 12 within this system to monitor the equipment's own inflow rate, while simultaneously receiving real-time discharge data from existing external main pipeline flowmeters (such as large ultrasonic open channel flowmeters) within the factory premises via an external data interface to implement advanced strategies.

[0032] 1. Accumulated Flow Triggered Sampling: The control module continuously accumulates the sewage discharge volume transmitted from the main pipeline flow meter in the background. The system is set to automatically trigger the rotary distributor and sampling needle to perform a sampling operation every 1000 cubic meters of wastewater discharged.

[0033] 2. Flow rate ratio sampling: To accurately reflect the total amount of wastewater discharged and the water quality, the system dynamically adjusts the sampling time interval. When the main pipeline flow meter shows that the enterprise is in the peak discharge period, the system shortens the sampling interval and increases the frequency; during the off-peak period, the interval is extended and the frequency is reduced, making the samples collected under different discharge volumes more representative on average.

[0034] 3. Sampling triggered by abnormal flow events: The system monitors the rate of change of flow meter data in the main pipeline in real time. Once a sudden surge in sewage flow is detected (which may indicate illegal discharge or accidental leakage), the control module will immediately and forcibly execute an emergency sampling command, solidifying and sealing the abnormal water quality in the sampling bottle to provide irrefutable physical evidence for environmental law enforcement.

[0035] This invention is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this invention. However, regardless of any changes made in their shape or structure, any technical solution that falls within the scope of the claims of this invention shall be protected by this invention.

Claims

1. A water quality sampling in-situ automatic packaging system, characterized in that, include: Sampling box cover (1), rotary water separator (2), sampling box (3), sampling bottle (4), water sample collection pool (5), sampling arm (6), composite sampling needle (7), fan and electromagnetic flow meter (12); The sampling box (3) is provided with a sampling box cover (1) on the top. The sampling box cover (1) is provided with a rotating water separator (2) on the inside. The rotating water separator (2) is connected to the sampling arm (6). The sampling arm (6) is a telescopic structure. The sampling arm (6) is provided with a composite sampling needle (7). The sampling tube (10) is connected to the outside of the sampling box cover (1), and the electromagnetic flowmeter (12) is provided at the connection between the sampling tube (10) and the outside of the sampling box cover (1). The sampling box (3) contains a plurality of sampling bottles (4), the bottle cap of the sampling bottle (4) is a split bottle cap (18), the center of the split bottle cap (18) is provided with an elastic plastic sealing film (19), and the sampling bottle (4) is provided with a fixative module (17). The composite sampling needle (7) is provided with a ball screw module (13) for driving its up and down displacement and a fluid flow path (14). A first stop valve (15) and a second stop valve (16) are respectively provided on both sides of the composite sampling needle (7). When the composite sampling needle (7) descends, it passes through the elastic plastic seal membrane (19), punctures the fixative module (17), and injects water sample. The amount of water sample injected is measured by the electromagnetic flow meter (12). When it rises, the first stop valve (15) and the second stop valve (16) are configured to drive the elastic plastic seal membrane (19) upward and disconnect from the elastic plastic seal membrane (19) one after the other at a preset time difference, so as to achieve the self-sealing of the cracked bottle cap (18).

2. The in-situ automatic packaging system for water quality sampling according to claim 1, characterized in that, When the first stop valve (15) is disconnected from the elastic sealing film (19), one side of the split bottle cap (18) descends first; when the second stop valve (16) is disconnected from the elastic sealing film (19), the other side of the split bottle cap (18) descends subsequently; the opposite sides of the split bottle cap (18) form a closed sealing structure with overlapping upper and lower sections under the restoring force of the elastic sealing film (19).

3. The in-situ automatic packaging system for water quality sampling according to claim 1, characterized in that, It also includes a control module, which is communicatively connected to the electromagnetic flowmeter (12), the rotary distributor (2) and the ball screw module (13); the control module is used to control the injection volume of a single sampling based on the reading of the electromagnetic flowmeter (12); and the control module is also configured to receive the sewage flow data stream sent by the external main pipeline flowmeter and trigger the advanced sampling strategy action accordingly.

4. The in-situ automatic packaging system for water quality sampling according to claim 3, characterized in that, The control module includes an advanced sampling strategy, comprising: Accumulated flow trigger sampling strategy: The control module continuously accumulates the sewage flow data of the main pipeline flow meter. Whenever the accumulated sewage flow reaches a preset volume threshold, the sampling system is automatically triggered. Flow ratio sampling strategy: The control module dynamically adjusts the sampling frequency of this system according to the real-time sewage flow monitored by the main pipeline flow meter. When the sewage flow increases, the sampling frequency is increased, and when the sewage flow decreases, the sampling frequency is decreased, so as to obtain a mixed sample representing the average water quality of the entire discharge cycle.

5. The in-situ automatic packaging system for water quality sampling according to claim 3, characterized in that, The advanced sampling strategy built into the control module also includes: Sampling strategy triggered by abnormal flow events: The control module monitors the rate of change of the main pipeline flow meter data. When the rate of change of the sewage flow rate increases or decreases suddenly exceeds the set abnormal threshold, the system's emergency sampling action is immediately triggered.

6. The in-situ automatic packaging system for water quality sampling according to claim 1, characterized in that, The water sample collection pool (5) is located at the center inside the sampling box (3) and is used to load mixed samples. Multiple sampling bottles (4) are distributed in an inner and outer ring around the water sample collection pool (5). The sampling arm (6) can align the water sample collection pool (5) and the sampling bottles (4) in the inner and outer rings by extension, retraction and rotation.

7. The in-situ automatic packaging system for water quality sampling according to claim 6, characterized in that, The sampling box (3) contains the fan; after a single water injection is completed, the fan draws clean air to back-blown the composite sampling needle (7) and the internal pipeline of the sampling tube (10).

8. The in-situ automatic packaging system for water quality sampling according to claim 1, characterized in that, A filter (11) is provided at the end of the sampling tube (10); a refrigerator (8) is provided on one side of the sampling box (3) to maintain the low temperature inside the sampling box (3).

9. The in-situ automatic packaging system for water quality sampling according to claim 1, characterized in that, The sampling box (3) has four pulleys (9) at the four corners of its bottom.

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