A system and method for detecting corrosion status of water supply pipelines by embedded sampling

Abstract

The present invention relates to a water supply network sampling system, and in particular to a system and method for detecting the corrosion state of a water supply pipeline by embedded sampling, comprising a reaction pipe section, a screw and a reagent sheet connected to the pipe network through a water pipe; the reaction pipe section is provided with a screw hole on the side wall, the screw is screwed into the screw hole, the screw rod of the screw extends into the side wall of the reaction pipe section and keeps the screw rod end flush with the inner wall surface of the reaction pipe section; the end of the screw rod is provided with a reagent sheet slot, and the reagent sheet is embedded in the reagent sheet slot; the outer side of the screw rod is coated with a sealing film, and when the screw is screwed into the screw hole, the reagent sheet slot is adjusted in direction so that the opening direction of the reagent sheet slot is opposite to the direction of water flow, and the interaction force between the shear force of the water flow and the inner side wall of the slot is used to stabilize the reagent sheet. Compared with the prior art, the present invention solves the problem in the prior art that the biofilm is affected when sampling the pipe network, resulting in inaccurate results, and realizes a method of installing and detaching a reagent sheet in situ, not introducing new pollutants, and not contaminating the microbial film sample.

Description

Technical Field

[0001] The invention relates to a water supply network sampling system, and in particular to a system and method for detecting the corrosion state of a water supply pipeline by using an embedded sampling method. Background Art

[0002] Currently, the detection of corrosion behavior within water supply pipe sections usually involves connecting independent pipe sections in series with the original pipe sections, which seriously affects biofilm sampling. When exploring the temporal changes in the growth of microorganisms on the pipe wall, it is necessary to design a large number of pipe sections, which is not conducive to actual installation and operation. In addition, bio-annular reactors are often used to simulate the water supply network water supply conditions. The speed of the water supply in the pipe network is simulated by changing the rotation speed of the drum. However, this method cannot eliminate the influence of the water flow caused by the rotation of the shaft, and the water pressure distribution in the drum is also very different from that of the actual water body, making the measured data and analysis results difficult to apply to the actual situation in the pipe network.

[0003] A few current designs utilize in-situ installation of cast iron sheets, with non-removable threaded reagent sheets. This approach not only makes the reagent sheets excessively large and thick, hindering subsequent analysis, but also renders the device irreusable, resulting in economic losses and waste, requiring significant investment in actual pipe network installation and testing. Furthermore, when sampling microorganisms, the water in the pipes is typically drained first, causing the interaction between the biofilm and the water flow to shift from internal pressure to no internal pressure, affecting the detection of trace substances contained within the biofilm, such as quorum sensing molecules, and causing test results to differ from actual conditions.

[0004] Therefore, it is necessary to design a method for fixing reagent sheets that is detachable and will not introduce new contamination, and a method for culturing microbial films in pipe networks under simulated in-situ water flow conditions. Summary of the Invention

[0005] The purpose of the present invention is to solve at least one of the above problems and to provide an embedded sampling system and method for detecting the corrosion status of water supply pipes, so as to solve the problem in the prior art that biofilms may be contaminated when sampling the pipe network, resulting in inaccurate results. It realizes a method that can be installed in situ and detachable reagent sheet without introducing new pollutants and damaging the microbial film sample.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] The first aspect of the present invention discloses an embedded sampling system for detecting the corrosion status of a water supply pipeline, comprising a reaction pipe section connected to a pipe network through a water pipe, screws, and a reagent tablet;

[0008] The reaction tube section is provided with a screw hole on the side wall, the screw is screwed into the screw hole, the screw rod extends into the side wall of the reaction tube section and the end of the screw rod is kept flush with the inner wall surface of the reaction tube section;

[0009] The end of the screw is provided with a reagent tablet groove, and the reagent tablet is embedded in the reagent tablet groove;

[0010] The outer side of the screw is covered with a sealing film. When the screw is screwed into the screw hole, the direction of the reagent tablet slot is adjusted so that the opening direction of the reagent tablet slot is opposite to the direction of water flow. The reagent tablet is stabilized in the reagent tablet slot by utilizing the shear force of the water flow and the interaction force between the reagent tablet and the inner side wall of the reagent tablet slot.

[0011] The length of the screw is longer than the wall thickness of the reaction tube section, so that the reagent tablet loaded on the end of the screw can fully contact with the water flow; the reagent tablet can be replaced according to the type required by the experiment; in addition to the sealing effect, the sealing film also provides a certain margin for the screw to adjust the direction of the reagent tablet slot.

[0012] Preferably, the reactor tube segment comprises several reactor tube segments connected in series; the leading end of the first reactor tube segment and the trailing end of the last reactor tube segment are connected to the pipe network via an inlet pipe and an outlet pipe, respectively, after being connected to a reducing pipe segment. Reactor tubes can be added or removed as needed.

[0013] Preferably, the reactor tube is provided with 4-10 sections. The tube material, diameter and length of the reactor tube can be adjusted according to experimental requirements.

[0014] Preferably, the reaction tube sections are provided with sealing gaskets at the connection points of each section of the reactor tube to prevent water leakage from affecting the experimental results.

[0015] Preferably, the water inlet pipe and the water outlet pipe connecting the reaction tube section and the pipe network are flexible pipes, and water valves are respectively provided on the water inlet pipe and the water outlet pipe; when sampling, the water valve of the water outlet pipe is closed first, and then the water valve of the water inlet pipe is closed, and the water inlet pipe and the water outlet pipe are raised to keep the reaction tube section in a pressurized state.

[0016] Further preferably, the water inlet pipe and the water outlet pipe are made of corrosion-resistant hoses.

[0017] Preferably, the reaction pipe section can be connected to a branch pipe of the pipe network to reduce interference with the water flow in the main pipe section.

[0018] Preferably, the inner side wall of the groove is configured as an inclined surface.

[0019] Preferably, the reagent sheet is trapezoidal, the shape and size of the reagent sheet slot match the reagent sheet, and the reagent sheet is embedded in the reagent sheet slot. The reagent sheet is embedded and fixed using the principles of physics, that is, the direction of the water flow shear force is opposite to the direction of the insertion opening of the reagent sheet slot, and an oblique inner sidewall of the slot is provided to provide interaction force between the reagent sheet and the reagent sheet, forming a detachable method that is continuously reinforced by the action of water flow in the pipeline, ensuring that the reagent sheet is stably and reliably assembled on the screw.

[0020] Preferably, the reaction tube section is a cast iron tube, a steel tube, a stainless steel tube or a plexiglass tube, the screw is made of polytetrafluoroethylene, and the sealing film is a polytetrafluoroethylene film.

[0021] Preferably, a flow meter can be provided on the water inlet pipe of the reaction tube section, and the water flow velocity in the pipe can be regulated to be the same as the experimental requirements by adjusting the flow meter.

[0022] The second aspect of the present invention discloses a method for detecting the corrosion status of a water supply pipeline by using an embedded sampling method. The method adopts any of the above-mentioned systems for sampling. The specific steps are as follows:

[0023] S1: Connect the reaction tube segment to the pipe network, insert the reagent tablet into the reagent tablet slot, and cover the outer side of the screw with a sealing film;

[0024] S2: Screw the screw into the screw hole of the reaction tube segment so that the end of the screw extends into the side wall of the reaction tube segment. Adjust the direction of the reagent tablet slot so that the reagent tablet slot is opposite to the direction of water flow, while keeping the end of the screw flush with the inner wall of the reaction tube segment.

[0025] S3: When taking samples, raise the water pipe connecting the reaction tube section and the pipe network to keep the reaction tube section under pressure; after taking samples, measure the reagent tablet.

[0026] Preferably, the thickness, composition and electron transfer capacity of the corrosion scale on the reagent sheet are measured by an electrochemical workstation; the thickness of the microbial film, microbial community structure, metabolites and extracellular polymers on the reagent sheet are measured by fluorescence technology and omics technology.

[0027] By taking samples from multiple screw holes and comparing the scale composition, morphology, and weight of the reagent tablets with the isolated microbial samples over the same time period, the scale status, corrosion rate, and microbial enrichment characteristics within the water supply pipe wall can be determined. This method can be used for in-situ testing at the terminal end of the water supply network, effectively improving the applicability of test results to actual applications, providing a reliable technical means for monitoring pipe network safety and a reference for subsequent maintenance of water supply network water safety.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The reagent sheet of the present invention is assembled in an embedded manner and has a detachable function. The reagent sheet can be replaced according to the sampling conditions and experimental requirements, thereby improving the operability of the entire system. Moreover, the assembly method utilizes the principle of interaction of physics and is reinforced by water flow, which does not interfere with the experimental results, thereby improving the scientific nature of the experiment and having extremely strong applicability and scientific research value. In addition, since the reagent sheet is limited by the limitations of the physical structure and the force of the water flow and the inner side wall of the tank, no additional impurities and chemicals are introduced into the water flow. Therefore, the system can be directly connected back to the pipe network without being discharged as wastewater, thereby avoiding a large amount of waste of water resources.

[0030] In the present invention, when the screw is screwed in, a sealing film is coated on the outside of the screw. In particular, a polytetrafluoroethylene film is used as the sealing film, and the thickness of the film can be controlled, which can effectively ensure that the direction of the bottom opening is consistent with the direction of water flow, thereby improving the operability of the reagent sheet and reducing experimental interference introduced during installation.

[0031] The reaction tube segment of the present invention is formed by connecting reactor tubes in series using flanges, making the applicability of the entire detection system more flexible. The water pipe material, diameter, and length can be changed according to site restrictions, experimental requirements, and other conditions to meet the space and research requirements. The reagent sheet embedded in the end can be stably and quantitatively inserted into the interior of the reaction tube segment by screwing it to the opening on the side wall of the reaction tube segment, making sampling more convenient and reducing disturbance to other parts of the tube. Since the water pipes on both sides of the reaction tube segment are raised during sampling, the entire sampling process can ensure that the sample is always under pressure at the moment of sample removal, effectively reducing the diffusion of tube wall materials in the water body and improving the authenticity of the sample.

[0032] The sampling method of this invention can be used not only to monitor pipeline corrosion (including biological and chemical corrosion) in actual projects, but can also be applied in the laboratory to assist in exploring specific corrosion dynamics. Furthermore, the reagent tablet can be directly used for microbial fluorescence scanning to determine microbial growth and biofilm composition, providing a new approach for in-situ monitoring of pipe wall biocorrosion.

[0033] The solution of the present invention not only solves the difficulties and interference issues of biofilm sampling, but also provides an effective means of analyzing the growth of biofilms in water supply pipes over time through continuous sampling. In-situ testing can be performed at the terminal of the water supply network, effectively improving the applicability of test results to practical applications. This provides a reliable technical means for monitoring pipe network safety and a reference for subsequent maintenance of water supply network water safety, greatly enhancing the practical application significance of the present invention.

[0034] The system structure of the present invention is simple, the method is easy to operate, and it is easy to promote and use. By modifying the branch pipe network, the impact on the main pipe during the modification can be avoided as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic structural diagram of the screw in the present invention from the front;

[0036] Figure 2 This is a schematic diagram of the structure of the screw in the present invention when viewed from above;

[0037] Figure 3 This is a schematic diagram of the structure of the screw in the present invention from a top view;

[0038] Figure 4 This is a schematic diagram of the assembly direction of the reagent tablet and the reagent tablet slot in the present invention;

[0039] Figure 5 Schematic diagram of the structure of the reagent sheet of the present invention;

[0040] Figure 6 This is a schematic diagram of the structure of the system during normal operation of the present invention;

[0041] Figure 7 This is a schematic diagram of the structure of the system of the present invention when sampling;

[0042] Figure 8 Schematic diagram of the structure of the reactor tube in the present invention;

[0043] In the figure: 1-reaction tube section; 11-screw hole; 12-reactor tube; 2-screw; 21-screw rod; 22-reagent tablet slot; 23-inner side wall of the slot; 3-reagent tablet. DETAILED DESCRIPTION

[0044] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] Example 1

[0046] An embedded sampling system for detecting corrosion status of water supply pipes, such as Figure 1-8 As shown, it includes a reaction pipe section 1 connected to the pipe network through a water pipe, a screw 2 and a reagent tablet 3;

[0047] The reaction tube segment 1 has a screw hole 11 on its side wall, and the screw 2 is screwed into the screw hole 11. The screw rod 21 of the screw 2 extends into the side wall of the reaction tube segment 1 and keeps the end of the screw rod 21 flush with the inner wall surface of the reaction tube segment 1.

[0048] The end of the screw 21 is provided with a reagent tablet slot 22, and the reagent tablet 3 is embedded in the reagent tablet slot 22;

[0049] The outer side of the screw rod 21 is covered with a sealing film. When the screw 2 is screwed into the screw hole 11, the direction of the reagent tablet slot 22 is adjusted so that the opening direction of the reagent tablet slot 22 is opposite to the direction of the water flow. The reagent tablet 3 is stabilized in the reagent tablet slot 22 by utilizing the shear force of the water flow and the interaction force between the reagent tablet 3 and the inner side wall 23 of the reagent tablet slot 22.

[0050] More specifically, in this embodiment:

[0051] A system for sampling and detecting the corrosion status of a water supply pipe by taking a sample from a screw hole 11, such as Figure 6-8 The apparatus comprises a water inlet pipe, a water outlet pipe, a detachable reaction tube section 1 with a screw hole 11, a polytetrafluoroethylene screw 2 with a groove (reagent tablet slot 22) cut in the bottom to accommodate a reagent tablet 3, a water supply tube reagent tablet 3, and a polytetrafluoroethylene film. The reaction tube section 1 can be composed of multiple reactor tubes 12 connected in series. Each reactor tube 12 is connected by a flange. Flanges are designed at both ends of the reactor tubes 12, with flange holes provided. Gaskets are used at the flange connection between the two reactor tubes 12 to prevent water leakage. The structure must be strictly inspected during operation to prevent water leakage from affecting experimental results.

[0052] The reagent sheet 3 is installed as follows Figure 1-5 As shown, it is placed in the reagent tablet slot 22 at the bottom of the screw 21 of the screw 2 in an embedded manner. When the screw 2 is installed, the water flow direction is strictly followed in the opposite direction of the reagent tablet slot 22, so that the shear force of the water flow on the reagent tablet 3 is directed toward the other side of the opening of the reagent tablet slot 22, and the reaction force is generated by the back side of the opening. Figure 4 Taking the direction shown as an example, with water flowing from bottom to top, the shear force applied to the surface of the reagent tablet 3 is also directed toward the unopened side, thereby maintaining the stability of the reagent tablet 3. Furthermore, the inner sidewall 23 of the reagent tablet slot 22 is configured as a beveled edge to match the size and shape of the reagent tablet 3. When the water flow is under negative pressure, such as hydraulic disturbance, the inner sidewall 23 can provide an interaction force on the reagent tablet 3, preventing the reagent tablet 3 from loosening and falling into the interior of the reaction tube segment 1.

[0053] The number of the reactor tubes 12 can be 4 to 10. Figure 6 、 7 As shown, in this embodiment, a reaction tube section 1 is formed by connecting four reactor tubes 12 in series. Both ends of the reactor tube 12 are flanged. Specifically, threaded openings are provided at the leading and trailing ends of the reaction tube section 1, allowing for the installation of small reduction pipe sections, which are then connected to the inlet and outlet pipes on the pipe network. The reactor tube 12 can be made of cast iron, steel, stainless steel, or plexiglass. The material, diameter, and length of the reactor tube 12 can be adjusted according to experimental requirements.

[0054] All interfaces can be sealed with polytetrafluoroethylene films, and all components are installed in a detachable manner, so that the number of reactor tubes 12 can be determined by demand.

[0055] A trapezoidal groove (reagent sheet groove 22) is provided at the bottom of the polytetrafluoroethylene screw 2, and the reagent sheet 3 is also designed to be trapezoidal, with dimensions strictly in accordance with the bottom hole pattern of the polytetrafluoroethylene screw 2. The reagent sheet 3 is fixed by the interaction between the material and the trapezoidal groove.

[0056] After the polytetrafluoroethylene screw 2 is screwed into the wall of the reaction tube section 1, a polytetrafluoroethylene film is used to seal it and the direction and screwing depth of the screw 2 are corrected.

[0057] The flow meter is set in front of the water inlet reactor, and the flow velocity in the regular pipe is adjusted by the flow meter to be the same as the experimental requirements, such as Figure 6 、 7 Install.

[0058] The connection between the reaction tube section 1 and the pipe network uses corrosion-resistant hoses as water inlet and outlet pipes.

[0059] When the experiment reaches the designed time period, when sampling the reagent slice 3, the water inlet and outlet pipes at both ends need to be lifted to maintain a certain height (higher than the reaction tube section 1). After the pressure in the control tube is maintained, the reagent slice 3 is taken out and a new reagent slice 3 is immediately installed.

[0060] When the experiment reaches the designed time period, the reagent sheet 3 is taken out and the cells on the reagent sheet 3 are directly fluorescently stained to mark the microorganisms.

[0061] An embedded method for detecting corrosion behavior of water supply pipes is carried out using the above system (built in the laboratory). The system operation design is as follows Figure 6 、 7 As shown, it specifically includes a water inlet pipe, a water outlet pipe, a flow meter, a water pump, a water tank and a reaction pipe section 1 (such as Figure 8 As shown), the reaction tube section 1 is formed by four sections of reactor tubes 12 connected in series by flanges. The joints of adjacent reactor tubes 12 are sealed with silicone gaskets. Valves are installed on the water inlet pipe and the water outlet pipe to control the water flow.

[0062] Before the system is operated, all metal objects and polymer accessories in the entire system loop should be disinfected with anhydrous ethanol to improve the reliability of detection.

[0063] Before operation, 20 mg / L sodium hypochlorite (<16% free chlorine) was circulated through the reactor section 1 for 24 hours at the maximum flow rate. The entire system was then repeatedly flushed with ultrapure water at the maximum flow rate until the chloride ion content was reduced to the level of the inlet water.

[0064] The surfaces of all inserted reagent tablets 3 were polished with three different sandpapers (220, 600, and 1200 mesh), rinsed with anhydrous ethanol, air-dried, and then sterilized under a UV germicidal lamp for 30 minutes. The prepared reagent tablets 3 were inserted into the reagent tablet slot 22 at the bottom of the screw hole 11. The opening direction of the reagent tablet slot 22 was regulated by polytetrafluoroethylene film to be opposite to the direction of water flow, and the screwing depth was such that the end of the screw 21 was substantially flush with the inner wall of the tube. The hydraulic state in the tube was kept consistent with that in the pipe network as much as possible to prevent the screw 21 and the reagent tablet 3 from affecting the flow state of the water flow and ensure the authenticity and validity of the test results.

[0065] The specific installation content includes the following steps:

[0066] S1, the detachable reaction tube section 1 with a screw hole 11 is connected to the pipe network, in this embodiment, it is connected to the water tank circulation pipe, the water supply pipe reagent tablet 3 is embedded in the reagent tablet slot 22 at the bottom of the screw 2, using polytetrafluoroethylene film as a sealing film wrapped around the thread;.

[0067] S2. The bottom of the screw 2 screwed into the screw hole 11 needs to be flat and can be designed with a socket. For specific design, see Figure 1-4 The length of the screw 21 must not be less than the thickness of the tube wall (usually ≥1 cm), so that the end of the screw 21 loaded with the reagent tablet 3 can extend into the reaction tube segment 1 and just be flush with the inner wall of the tube. The opening direction of the reagent tablet slot 22 at the bottom of the screw 2 must be opposite to the direction of water flow, and the shear force of the water flow is used to fix the reagent tablet 3 embedded in the bottom of the screw 2;

[0068] S3. The inlet and outlet pipes must be able to be lifted and lowered, and flexible pipes should be used. When sampling, close the outlet pipe valve first, then the inlet pipe valve. At the same time, ensure that the water level in the flexible pipe section is higher than the pipe section reactor.

[0069] During operation, water is pumped into reaction tube section 1 via a pump. A flow valve controls the flow rate, and water flows out of the outlet pipe back into the water tank. Water samples are collected in the tank, where a built-in rotor mixes the water flow, ensuring similar pollutant concentrations at all points within the tank. The pipeline is set to an ideal, homogeneous mixing state.

[0070] This experiment, after running for 3 days, took biofilm samples for the first time. First, raise the water inlet pipe and the outlet pipe ends, higher than the reaction tube section 1, turn off the water pump, and close the outlet valve and the water inlet valve in sequence, so that the reaction tube section 1 is in a pressurized state. Unscrew the screw 2 on the first section reactor tube 12 after the water inlet, and remove the reagent sheet 3 in the reagent sheet groove 22. After installing a new reagent sheet 3 immediately, screw 2 is replaced on the reactor tube 12, and polytetrafluoroethylene film is used for sealing and direction correction. Take two reagent sheets 3 at each time. Then, every interval of time, such as 15 days, 30 days, 60 days, etc., is selected according to the experimental requirements, and sampling is carried out to detect the growth of biofilm in different time periods.

[0071] When testing the corrosion process of the actual access pipe network, the Figure 6 、 7 The water pumps, water tanks and other transportation and storage equipment are not required. The reaction tube section 1 can be directly connected to the pipe network. The water flow can flow into the designed reaction tube section 1 from the water inlet pipe and then be freely discharged or collected and recycled through the water outlet pipe.

[0072] After sampling, the sample of the reagent sheet 3 can be directly stained. Take phosphate buffer solution (pH=7), slowly clean the surface of the reagent sheet 3, and then use BacLight TM Stain with the Bacterial Viability L7012 kit. Immediately store in the dark until measurement. Green dots represent live cells, and red dots represent dead cells. Monitor microbial growth trends and determine the severity of corrosion.

[0073] For the removed reagent sheet 3, the polarization curves at different time periods are detected to obtain the polarization resistance and corrosion current, which are then correlated with the microbial growth characteristics to obtain the change in the degree of corrosion of the water supply pipeline.

[0074] In addition, other conventional biochemical methods can be used to obtain relevant results of microbial growth, and other conventional electrochemical experiments can be used to determine the degree of pipeline corrosion.

[0075] This system and method uses multiple screw holes 11 to compare the composition, morphology, and weight of scale on reagent tablets 3 with separated microbial samples over the same time period, thereby determining the scale status, corrosion rate, and microbial enrichment characteristics within the water supply pipe wall. This method enables in-situ testing at the terminal end of the water supply network, effectively improving the applicability of test results to actual applications, providing a reliable technical means for monitoring pipe network safety and a reference for subsequent maintenance of water supply network water safety.

[0076] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention, without departing from the scope of the present invention, should be within the scope of protection of the present invention.

Claims

1. An embedded sampling system for detecting corrosion status of water supply pipelines, characterized in that: It includes a reaction pipe section (1) connected to the pipe network through a water pipe, a screw (2) and a reagent tablet (3); The reaction tube section (1) is provided with a screw hole (11) on the side wall, the screw (2) is screwed into the screw hole (11), the screw rod (21) of the screw (2) extends into the side wall of the reaction tube section (1) and keeps the end of the screw rod (21) flush with the inner wall surface of the reaction tube section (1), and the water inlet pipe and the water outlet pipe connecting the reaction tube section (1) and the pipe network are flexible pipes; The end of the screw (21) is provided with a reagent sheet slot (22), and the reagent sheet (3) is embedded in the reagent sheet slot (22); The outer side of the screw (21) is covered with a sealing film. When the screw (2) is screwed into the screw hole (11), the direction of the reagent tablet slot (22) is adjusted so that the opening direction of the reagent tablet slot (22) is opposite to the direction of the water flow. The reagent tablet (3) is stabilized in the reagent tablet slot (22) by utilizing the shear force of the water flow and the interaction force between the reagent tablet (3) and the inner side wall (23) of the reagent tablet slot (22). The inner side wall (23) of the reagent tablet slot (22) is set as an inclined surface.

2. The embedded sampling system for detecting corrosion status of water supply pipes according to claim 1 is characterized in that: The reaction pipe section (1) is composed of several sections of reactor pipes (12) connected in series; the head end of the first section of the reactor pipe (12) and the tail end of the last section of the reactor pipe (12) are connected to the pipe network through the water inlet pipe and the water outlet pipe respectively after connecting the reducing pipe section.

3. The embedded sampling system for detecting corrosion status of water supply pipes according to claim 2 is characterized in that: The reactor tube (12) is provided with 4-10 sections.

4. The embedded sampling system for detecting corrosion status of water supply pipes according to claim 2 is characterized in that: The reaction tube section (1) is provided with a sealing gasket at the connection between each section of the reactor tube (12).

5. The embedded sampling system for detecting corrosion status of water supply pipes according to any one of claims 1 to 4, characterized in that: Water valves are provided on the water inlet pipe and the water outlet pipe respectively; when sampling, the water valve of the water outlet pipe is closed first, and then the water valve of the water inlet pipe is closed, and the water inlet pipe and the water outlet pipe are raised to keep the reaction pipe section (1) in a pressurized state.

6. The embedded sampling system for detecting corrosion status of water supply pipelines according to claim 1 is characterized in that: The reagent sheet (3) is trapezoidal, the shape and size of the reagent sheet slot (22) match the reagent sheet (3), and the reagent sheet (3) is embedded in the reagent sheet slot (22).

7. The embedded sampling system for detecting corrosion status of water supply pipelines according to claim 1 is characterized in that: The reaction tube section (1) is a cast iron tube, a steel tube, a stainless steel tube or a plexiglass tube, the screw (2) is made of polytetrafluoroethylene, and the sealing film is a polytetrafluoroethylene film.

8. A method for detecting the corrosion status of a water supply pipeline by embedded sampling, characterized in that: Sampling is performed using the system according to any one of claims 1 to 7, and the specific steps are as follows: S1: Connect the reaction tube segment (1) to the pipe network, insert the reagent tablet (3) into the reagent tablet slot (22), and cover the outer side of the screw (21) of the screw (2) with a sealing film; S2: Screw the screw (2) into the screw hole of the reaction tube section (1) so that the end of the screw (21) extends into the side wall of the reaction tube section (1), adjust the direction of the reagent tablet slot (22) so that the reagent tablet slot (22) is opposite to the direction of the water flow, and keep the end of the screw (21) flush with the inner wall of the reaction tube section (1); S3: When sampling, the water pipe connecting the reaction pipe section (1) and the pipe network is raised to keep the reaction pipe section (1) under pressure; after sampling, the reagent sheet (3) is measured.

9. The method for detecting the corrosion status of a water supply pipeline by embedded sampling according to claim 8, characterized in that: The thickness, composition and electron transfer capacity of the corrosion scale on the reagent sheet (3) were measured by an electrochemical workstation; the thickness of the microbial film, microbial community structure, metabolites and extracellular polymers on the reagent sheet (3) were measured by fluorescence technology and omics technology.

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