Long-distance heat supply pipe network outer wall corrosion cloud platform monitoring system and use method

Abstract

The invention discloses a cloud platform monitoring system for corrosion of the outer wall of a long-distance heat supply pipe network and a using method, and belongs to the field of material corrosion protection research in a heat supply pipe network system.The cloud platform monitoring system comprises a long-distance heat supply pipe network cathode protection device, a cathode protection state monitoring device and a cloud platform monitoring module; the cathode protection device for the long-distance heat supply pipe network comprises a plurality of sacrificial anodes installed in a valve well along the heat supply pipe network; the cathode protection state monitoring device comprises a plurality of pipeline protection state monitoring devices, a pipeline potential monitoring cable, a reference electrode, a reference electrode testing cable and a cloud platform signal transmitting device; and the cloud platform monitoring module receives and displays the digital signal transmitted by the cloud platform transmitting device. According to the system, valve wells along the long-distance heat supply pipe network are used for implementing cathode protection, stray current corrosion can be avoided, and the protection state can be uploaded to a cloud platform in real time to be mastered by a user in time; excavation is not needed, and an anti-corrosion layer and a heat preservation layer are prevented from being damaged.

Description

Technical Field

[0001] The present invention belongs to the research field of material corrosion protection in a heating pipe network system, and specifically relates to a device and a method for using the device for alleviating corrosion of the outer wall of a long-distance heating pipe network and performing cloud platform monitoring. Background Art

[0002] With the expansion of the scale of centralized heating, the heating distance increases, the heating network becomes longer, and the geological structure of the long-distance pipeline is more complex. Although the outer walls of the heating pipelines are wrapped with thick anti-corrosion and thermal insulation layers, due to the large temperature changes of the pipelines and the displacement in the soil, the anti-corrosion and thermal insulation layers are at great risk of damage. For areas with high groundwater levels or locations crossing farmland, groundwater penetrates through these damaged locations and contacts the pipelines, causing corrosion. The corrosion products formed after pipeline corrosion increase in volume, which will further damage the anti-corrosion and thermal insulation layers on the outer wall of the pipeline. When groundwater comes into contact with high-temperature pipelines during the heating season, high-temperature steam is formed, which will cause local peeling of the anti-corrosion layer. In the non-heating season, these gaps will further accumulate water, causing more serious damage.

[0003] Long-distance heating pipelines are often buried about 5-8 meters deep in the ground. The early stages of pipeline corrosion are difficult to detect and cannot be monitored in real time. Currently, it can only be observed on the ground when a pipeline leaks or groundwater passes through the insulation layer and gas is emitted. By the time it is discovered, the insulation layer is often irreparable, making pipeline maintenance difficult and causing great economic losses. If a leak occurs during the heating season, high-pressure water exceeding 100°C in the pipeline will spray out of the pipeline, and the safety risks of workers who are plugging leaks under pressure are extremely high. In summary, for long-distance heating pipelines, relying solely on the anti-corrosion layer and insulation layer on the surface of the pipeline is not enough to provide good protection for the outer wall of the pipeline. Once the outer wall of the pipeline corrodes, it will cause great harm.

[0004] Cathodic protection technology has been maturely applied in long-distance oilfield pipelines. Cathodic protection can form a joint protection with the anti-corrosion layer on the outside of the pipeline. When the anti-corrosion layer is partially damaged or notched, cathodic protection provides additional electrons to prevent metal corrosion of the pipeline. However, this technology has not been widely used in heating pipe networks. The main reason is that the thick insulation layer on the outer wall of the heating pipe network and the complex valve well structure result in a small range of cathodic protection. In addition, the deep landfill depth of the heating pipe network is not conducive to the status monitoring of cathodic protection.

[0005] When implementing cathodic protection on already built long-distance heat supply pipelines, it is necessary to weld cables to the outer wall of the pipeline to form an electrical connection. However, the outer wall of the heat supply pipeline is often covered with a 20cm thick insulation layer and anti-corrosion layer. When making electrical connections on the outer wall of the pipeline, the outer insulation layer will inevitably be damaged. This is also a difficulty in implementing cathodic protection on the heat supply pipeline. Summary of the invention

[0006] In order to solve the problems existing in the prior art, the present invention provides a cloud platform monitoring system for the outer wall corrosion of a long-distance heating pipeline network and a method for using the system. The system can cooperate with the anti-corrosion layer and the insulation layer of the long-distance heating pipeline network to form a joint protection for the outer wall of the pipeline, and display the pipeline protection status of each point in real time on the mobile terminal of the operator through the cloud platform, providing a reference for the operator.

[0007] In order to achieve the above object, the present invention provides the following technical solutions.

[0008] In the first aspect, the present invention provides a cloud platform monitoring system for the outer wall corrosion of a long-distance heating pipeline network, comprising a cathodic protection device for a long-distance heating pipeline network, a cathodic protection state monitoring device and a cloud platform monitoring module; the cathodic protection device for the long-distance heating pipeline network comprises a plurality of sacrificial anodes installed in valve wells along the heating pipeline network; the sacrificial anodes are buried in the soil in the valve well or immersed in the accumulated water in the valve well; the cathodic protection state monitoring device comprises a plurality of pipeline protection state monitoring devices, a pipeline potential monitoring cable, a reference electrode, a reference electrode test cable and a cloud platform signal transmitting device; one end of the pipeline potential monitoring cable is fixedly connected to the top of the heating pipeline, and the other end is connected to the pipeline protection state monitoring device; one end of the reference electrode test cable is connected to the reference electrode, and the other end is connected to the pipeline protection state monitoring device; the pipeline protection state monitoring device is electrically connected to the cloud platform signal transmitting device; the pipeline protection state monitoring device collects the potential signals of the reference electrode and the heating pipeline, converts them into digital signals, and then transmits them through the cloud platform transmitting device; the cloud platform monitoring module receives and displays the digital signals emitted by the cloud platform transmitting device.

[0009] As a further improvement of the present invention, at least two sacrificial anodes are installed on each heating pipe.

[0010] As a further improvement of the present invention, the fixed connection between the sacrificial anode and the heating pipeline is selected by thermite welding.

[0011] As a further improvement of the present invention, the reference electrode uses a saturated copper sulfate solution as the electrolyte.

[0012] As a further improvement of the present invention, the cloud platform launching device is welded and fixed to the edge of the valve manhole cover.

[0013] As a further improvement of the present invention, the fixed connection between the pipeline potential detection cable and the heating pipeline is selected by thermite welding.

[0014] As a further improvement of the present invention, a fluorocarbon paint layer is provided on the welding point between the pipeline potential detection cable and the heating pipeline.

[0015] As a further improvement of the present invention, the sacrificial anode and the bottom of the heating pipe have at least two fixed connection points.

[0016] As a further improvement of the present invention, a waterproof cover is provided outside the pipeline protection status monitoring device.

[0017] In a second aspect, the present invention provides a method for using a cloud platform monitoring system for outer wall corrosion of a long-distance heating pipeline network, comprising the following steps: 1) Install the cathodic protection device of the long-distance heating pipeline network in the valve well of the heating pipeline network; if there is no water accumulation in the valve well, bury the sacrificial anode completely in the soil; if there is water accumulation in the valve well all year round, immerse the sacrificial anode in the water in the valve well; for the anti-corrosion layer on the surface of the heating pipeline damaged during welding, use polyepoxy anti-corrosion layer patch to repair it; 2) Start the cathodic protection status monitoring device and the cloud platform monitoring module; judge the corrosion protection status of the pipeline according to the data displayed by the cloud platform monitoring module; when the potential is lower than the preset value, the heating pipeline is in a fully protected state; when the potential is higher than the preset value, the heating pipeline is in an incompletely protected state.

[0018] Compared with the prior art, the present invention has the following beneficial effects: A cloud platform monitoring system for the outer wall corrosion of long-distance heating pipelines is unique in that it integrates the long-distance heating pipeline cathodic protection device, the cathodic protection status monitoring device and the cloud platform monitoring module to form an efficient and real-time monitoring system. The application of this system will help improve the safety and reliability of heating pipelines and reduce pipeline damage and maintenance costs caused by corrosion.

[0019] At least two sacrificial anodes are installed on each heating pipe to ensure the comprehensiveness and reliability of cathodic protection, thereby extending the service life of the heating pipe and improving safety.

[0020] The use of aluminothermic welding on heating pipes can produce high-strength welds to ensure a firm connection between the pipeline potential detection cable and the heating pipe. This high-strength connection can withstand greater mechanical and thermal stresses, preventing the connection from loosening or breaking due to temperature changes, vibrations and other factors during long-term operation. At the same time, the welds formed by aluminothermic welding have good conductivity, which can ensure accurate transmission of potential signals. In a corrosive environment, the welds can maintain their integrity and stability for a long time, thereby extending the service life of the system. At the same time, aluminothermic welding is relatively simple to operate, does not require complex equipment and processes, can shorten the construction period, and reduce installation costs.

[0021] Coating a layer of fluorocarbon paint on the welding point can increase the corrosion resistance of the welding point. Fluorocarbon resin material has excellent corrosion resistance. As a dense protective film, it can effectively resist the erosion of corrosive media such as moisture, oxygen, and chemicals. It also has good adhesion to the metal surface and is not easy to fall off or peel off.

[0022] The present invention uses sacrificial anode cathodic protection to form a joint protection with the anti-corrosion coating on the surface of the heating pipe network, which can protect the damaged parts of the anti-corrosion coating. Each valve well along the way is designed with a cathodic protection status monitoring device, which can upload the protection status of the platform to the cloud platform in real time so that users can grasp it in time.

[0023] The present invention provides cathodic protection for the heating pipeline by utilizing valve wells along the long-distance heating pipeline network. Compared with the traditional impressed current cathodic protection, it can further reduce the interference of stray current and effectively avoid the corrosion of other buried pipelines caused by stray current. Compared with the traditional sacrificial anode method, it does not require excavation of the existing pipeline network and reduces the damage to the anti-corrosion layer and the thermal insulation layer.

[0024] This device is designed with a cloud platform monitoring device, which accurately collects key data on the potential difference between the reference electrode and the heating pipeline through the pipeline potential monitoring cable and the reference electrode test cable. It can facilitate users to monitor the protection potential of the heating pipeline network in real time, grasp the effect of cathodic protection, and improve system safety.

[0025] The present invention can help users to understand the corrosion of the outer wall of the heating pipeline anytime and anywhere, take necessary maintenance measures in time, and ensure the long-term stable operation of the heating pipeline network. At the same time, this intelligent monitoring method also greatly improves work efficiency and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are for explanation purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings: Figure 1 The present invention is a schematic diagram of a cloud platform monitoring system for full protection of outer wall corrosion of a long-distance heating pipeline network.

[0027] Figure 2 This is a cross-sectional view of a device of a cloud platform monitoring system for full protection of outer wall corrosion of a long-distance heating pipeline network according to the present invention.

[0028] Figure 3 It is the display interface of the heating pipe network's outer wall corrosion protection and cloud platform monitoring system.

[0029] In the figure, 1. the first cloud platform signal transmitting device, 2. the first pipeline protection status monitoring device, 3. the first pipeline potential monitoring cable, 4. the first reference electrode test cable, 5. the first saturated copper sulfate reference electrode, 6. the heating network, 7. the first valve well sacrificial anode, 8. the second valve well sacrificial anode, 9. the second saturated copper sulfate reference electrode, 10. the second pipeline potential monitoring cable, 11. the second pipeline protection status monitoring device, 12. the second cloud platform signal transmitting device, 13. the first valve well water accumulation, 14. the second valve well water accumulation, 15. the anti-corrosion layer and the thermal insulation layer, 16. the first sacrificial anode welding point, 17. the second sacrificial anode welding point, 18. the first sacrificial anode, 19. the heating pipeline, 20. the display interface, 21. the name display area, 22. the graphic display area, 23. the title display area, 24. the first valve well, 25. the second valve well, 26. the second reference electrode test cable. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0033] like Figure 1 , Figure 2 As shown, an object of the present invention is to provide a cloud platform monitoring system for the outer wall corrosion of a long-distance heating pipeline network, including a long-distance heating pipeline network cathodic protection device, a cathodic protection state monitoring device and a cloud platform monitoring module; The cathodic protection device of the long-distance heating pipeline network includes several sacrificial anodes 7 installed in the valve wells along the heating pipeline network 6; the sacrificial anodes 7 are buried in the soil in the valve well or immersed in the accumulated water in the valve well; the cathodic protection status monitoring device includes several pipeline protection status monitoring devices 2, pipeline potential monitoring cables 3, reference electrodes 5, reference electrode test cables 4 and cloud platform signal transmitting devices 1; one end of the pipeline potential monitoring cable 3 is fixedly connected to the top of the heating pipeline, and the other end is connected to the pipeline protection status monitoring device; one end of the reference electrode test cable 4 is connected to the reference electrode 5, and the other end is connected to the pipeline protection status monitoring device; the pipeline protection status monitoring device 2 is electrically connected to the cloud platform signal transmitting device 1; the pipeline protection status monitoring device 2 collects the potential signal of the reference electrode 5 and the heating pipeline, converts it into a digital signal, and then sends it through the cloud platform transmitting device; the cloud platform monitoring module receives and displays the digital signal sent by the cloud platform transmitting device.

[0034] Specifically, the long-distance heating pipe network outer wall corrosion cathodic protection device is installed in the valve well along the long-distance heating pipe network 6. The long-distance heating pipe network 6 passes through several valve wells along the way. The technical solution is illustrated by taking two adjacent valve wells, the first valve well 24 and the second valve well 25. The long-distance heating pipe network 6 has an exposed part in the valve well, which is wrapped with a thinner anti-corrosion layer and a thermal insulation layer 15 or is not provided with it compared with the outer wall of the heating pipeline, which can provide favorable conditions for the layout of the cathodic protection device. If the cathodic protection device is directly installed on the outer wall of the heating pipe, it is necessary to destroy the original insulation layer and anti-corrosion coating 15. After installation, the insulation layer and anti-corrosion coating 15 need to be repaired to avoid the damaged area affecting the potential reading; and the connection point between the cathodic protection device and the heating pipe will be exposed to the soil environment for a long time, especially in the heating season, and will be subjected to a high temperature and high humidity corrosive environment. If more severe electrochemical corrosion occurs due to stray current, the risk of corrosion damage to the heating network 6 will be aggravated; in addition, sacrificial anodes are arranged in the valve wells instead of using external current to achieve cathodic protection. There is no need to install an external power supply, which is easy to install, and the current output is small or not easy to generate stray current interference; the distance between adjacent valve wells of the heating pipeline does not exceed 1-2 kilometers, which does not exceed the protection range of the sacrificial anode cathodic protection.

[0035] like Figure 1As shown, in the first valve well 24 along the long-distance heating pipeline network 6, the sacrificial anode 7 is welded to the bottom of the pipeline, and each sacrificial anode maintains at least two stable welding points with the pipeline 6. The location of the welding point is selected in the valve well, which is convenient for construction, and the welding point is less corroded, which is conducive to long-term and continuous potential monitoring. For valve wells with water accumulation 13 or 14 all year round, the sacrificial anode can be immersed in the water in the valve well. For well chambers with relatively low groundwater levels and no water accumulation in the valve well, the sacrificial anode block 7 needs to be completely buried in the soil. At least two sacrificial anode blocks are installed on the pipeline in each valve well. The connection between the cable and the pipeline, the connection between the reference electrode test cable and the pipeline, and the connection between the pipeline potential monitoring cable and the pipeline can all be selected by aluminum thermite welding; fluorocarbon paint is applied to the welding points between the cable and the heating pipeline. The fluorocarbon paint layer has excellent corrosion resistance. As a dense protective film, it can effectively resist the erosion of corrosive media such as moisture, oxygen, and chemicals, and has good adhesion to the metal surface and is not easy to fall off or peel off. Epoxy resin and polyurethane can also be applied to the welding points. For the anti-corrosion layer on the surface of the pipeline damaged during welding, polyepoxy anti-corrosion layer patches should be used for repair.

[0036] The pipeline protection status monitoring device is composed of a first pipeline protection status monitoring device 2, a first cloud platform signal transmitting device 1, a first pipeline potential monitoring cable 3, a first reference electrode test cable 4, and a first saturated copper sulfate reference electrode 5, wherein the first pipeline test cable 3 is welded on the top of the heating pipe network 6 and is in direct contact with the pipeline matrix. A waterproof cover can be provided outside the pipeline protection status monitoring device 2. In a high temperature and high humidity working environment, the connection welding point of the first pipeline test cable 3 needs to be treated with anti-corrosion. The first reference electrode test cable 4 is connected to the first saturated copper sulfate reference electrode 5, and the first saturated copper sulfate reference electrode 5 is arranged on the side of the long-distance heating pipe network 6 in the valve well 24 near the pipeline. The first pipeline protection status monitoring device 2 monitors the protection status of the pipe network 6 in the section near the first valve well 24 by comparing the potential difference between the first reference electrode 5 and the heating pipe network 6. The first cloud platform signal transmitting device 1 is welded and fixed to the edge of the cover of the first valve well 24 to avoid overturning. The pipeline protection status monitoring device 2 transmits the measurement results through the first cloud platform signal transmitting device 1, and transmits the protection status of the heating pipeline network 6 in the valve well 24 to the cloud platform.

[0037] In the second valve well 25, a second pipeline protection status monitoring device 11 is also installed, which is composed of a second cloud platform signal transmitter 12, a second valve well sacrificial anode 8, a second pipeline potential monitoring cable 10, a second reference electrode test cable 26, and a second saturated copper sulfate reference electrode 9, wherein the second pipeline test cable 10 is welded on the top of the heating pipe network 6 and is in direct contact with the pipe matrix. A waterproof cover can be set outside the pipeline protection status monitoring device 11. In a high temperature and high humidity working environment, the connection welding point needs to be treated with anti-corrosion. The second reference electrode test cable 26 is connected to the second saturated copper sulfate reference electrode 9, and the second saturated copper sulfate reference electrode 9 is arranged on the side of the long-distance heating pipe network 6 in the valve well 25 near the pipeline. The second pipeline protection status monitoring device 11 monitors the protection status of the pipe network 6 in the section near the second valve well 25 by comparing the potential difference between the second reference electrode 9 and the heating pipe network 6. The second cloud platform signal transmitter 12 is welded and fixed to the edge of the first valve well 25 cover to avoid overturning. The pipeline protection status monitoring device 11 transmits the measurement results to the cloud platform through the second cloud platform signal transmitting device 12, and transmits the protection status of the heating pipe network 6. Once the signs of pipeline corrosion and damage are found, the staff can determine the specific location and extent of the damage in the heating pipe network 6 from the monitoring system, and further determine the inspection and remediation plan based on this, and carry out timely scheduling and maintenance.

[0038] like Figure 2 As shown, the first pipeline protection status monitoring device 2 is connected to the first saturated copper sulfate reference electrode 5 and the heating pipeline 19 through the first reference electrode test cable 4 and the first pipeline potential monitoring cable 3 respectively. The first pipeline protection status monitoring device 2 collects the potential signal of the reference electrode 5 and the heating pipeline 19, converts it into a digital signal and sends it through the cloud platform transmitter. The first sacrificial anode 18 is connected to the heating pipeline 19 through the first sacrificial anode welding point 16, and the first valve well sacrificial anode 7 is connected to the heating pipeline 19 through the second sacrificial anode welding point 17, providing anode protection for the heating pipeline 19. At least two sacrificial anodes are installed on each heating pipeline 19. This feature ensures the comprehensiveness and reliability of cathodic protection and improves the safety and service life of the heating pipeline 19. If there is an anti-corrosion layer and a thermal insulation layer 15 on the outer wall of the heating pipeline 19, it is necessary to clean it when welding the sacrificial anode, remove the surface layer, and perform appropriate repairs after welding. The existence of the anti-corrosion layer and the thermal insulation layer 15 and the application of the cathodic protection system effectively extend the service life of the heating pipeline 19.

[0039] like Figure 3 As shown, the heating pipe network outer wall corrosion full protection and cloud platform monitoring system 23 receives and summarizes the protection potential data of the pipelines in each valve well along the heating pipe network 6 and displays it on the display interface 20. Figure 3As shown, the display interface 20 displays a name display area 21, a display area 22 and a title display area 23. The system displays a distribution map of valve wells according to the relative positions of the valve wells along the heating pipe network 6, and determines whether the pipelines in the section near the valve wells are in a good protection state according to the data in the display interface. When the potential is lower than -0.85V, the pipelines in the section near the valve wells are in a fully protected state. At this time, the valve well displays a green light, and the influence of pipeline corrosion can be ignored.

[0040] The second object of the present invention is to provide a method for using a cloud platform monitoring system for outer wall corrosion of a long-distance heating pipeline network, comprising: 1) Install the cathodic protection device of the long-distance heating pipeline network in the valve well of the heating pipeline network 6; if there is no water accumulation in the valve well, bury the sacrificial anode 7 completely in the soil; if there is water accumulation in the valve well all year round, immerse the sacrificial anode 7 in the water in the valve well; for the anti-corrosion layer on the surface of the heating pipeline damaged during welding, use polyepoxy anti-corrosion layer patch to repair it; 2) Start the cathodic protection status monitoring device and the cloud platform monitoring module; judge the corrosion protection status of the pipeline according to the data displayed by the cloud platform monitoring module; when the potential is lower than the preset value, the heating pipeline is in a fully protected state; when the potential is higher than the preset value, the heating pipeline is in an incompletely protected state.

[0041] As an example, the preset value in the above solution can be set to -0.85V.

[0042] When the potential is higher than -0.85V, the pipeline in the section near the valve well is in an incompletely protected state. At this time, the valve well displays a red light, prompting the operator that the protection state of the pipeline near the valve well is abnormal and that the sacrificial anode block needs to be replaced or other on-site inspections of corrosion are required. By real-time monitoring of the potential of the heating pipeline, potential corrosion problems can be discovered and handled in a timely manner, thereby ensuring the safety of the heating pipeline.

[0043] In addition, the cloud platform monitoring module monitors the collected cathodic protection status in real time. Once an abnormality is found (such as the potential deviating from the preset range), the early warning mechanism is immediately triggered to notify relevant personnel via SMS, email or APP push. The system can also combine geographic information systems (GIS) and automated inspection robots or drones to accurately mark the location of faults or potential corrosion risks on the map, making it easy to quickly locate and take measures in the section near the valve well.

[0044] Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the preceding claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a disclaimer of such subject matter, nor should it be considered that the applicants did not consider such subject matter to be part of the disclosed inventive subject matter.

[0045] The above content is a further detailed description of the present invention. It cannot be determined that the specific implementation methods of the present invention are limited to these. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, they can also make several simple deductions or substitutions, which should be regarded as belonging to the protection scope of the present invention determined by the submitted claims.

Claims

1. A cloud platform monitoring system for the outer wall corrosion of long-distance heating pipeline networks, characterized by: It includes a long-distance heat supply pipeline network cathodic protection device, a cathodic protection status monitoring device and a cloud platform monitoring module; The long-distance heat supply pipeline network cathodic protection device comprises a plurality of sacrificial anodes (7) installed in valve wells along the heat supply pipeline network (6); The sacrificial anode (7) is buried in the soil in the valve well or immersed in the accumulated water in the valve well; The cathodic protection status monitoring device comprises a plurality of pipeline protection status monitoring devices (2), a pipeline potential monitoring cable (3), a reference electrode (5), a reference electrode test cable (4) and a cloud platform signal transmitting device (1); one end of the pipeline potential monitoring cable (3) is fixedly connected to the top of the heating pipeline, and the other end is connected to the pipeline protection status monitoring device; one end of the reference electrode test cable (4) is connected to the reference electrode (5), and the other end is connected to the pipeline protection status monitoring device; the pipeline protection status monitoring device (2) is electrically connected to the cloud platform signal transmitting device (1); The pipeline protection status monitoring device (2) collects potential signals between the reference electrode (5) and the heating pipeline, converts the potential signals into digital signals, and then transmits the signals through a cloud platform transmitting device; The cloud platform monitoring module receives and displays the digital signal sent by the cloud platform transmitting device.

2. According to claim 1, a long-distance heating pipeline network outer wall corrosion cloud platform monitoring system is characterized by: At least two sacrificial anodes (7) are installed on each heating pipe.

3. According to claim 1, a long-distance heating pipeline network outer wall corrosion cloud platform monitoring system is characterized by: The sacrificial anode (7) is fixedly connected to the heating pipeline by thermite welding.

4. According to claim 1, a long-distance heating pipeline network outer wall corrosion cloud platform monitoring system is characterized by: The reference electrode (5) uses a saturated copper sulfate solution as an electrolyte.

5. According to claim 1, a long-distance heating pipe network outer wall corrosion cloud platform monitoring system is characterized by: The cloud platform launching device is welded and fixed on the edge of the valve well cover.

6. The cloud platform monitoring system for outer wall corrosion of long-distance heat supply pipeline network according to claim 1 is characterized by: The fixed connection between the pipeline potential detection cable and the heating pipeline is selected by thermite welding.

7. A cloud platform monitoring system for outer wall corrosion of long-distance heat supply pipe network according to claim 5, characterized in that: A fluorocarbon paint layer is provided on the welding point between the pipeline potential detection cable and the heating pipeline.

8. The cloud platform monitoring system for outer wall corrosion of long-distance heat supply pipeline network according to claim 1 is characterized by: The sacrificial anode (7) is connected to the bottom of the heating pipe by at least two fixed connection points.

9. The cloud platform monitoring system for outer wall corrosion of long-distance heating pipeline network according to claim 1 is characterized by: The pipeline protection status monitoring device (2) is provided with a waterproof cover outside.

10. The method for using the long-distance heat supply pipe network outer wall corrosion cloud platform monitoring system according to any one of claims 1 to 9, characterized in that: include: S1: Install the cathodic protection device of the long-distance heating pipeline network in the valve well of the heating pipeline network (6); if there is no water accumulation in the valve well, bury the sacrificial anode (7) completely in the soil; if there is water accumulation in the valve well all year round, immerse the sacrificial anode (7) in the water in the valve well; repair the anti-corrosion layer on the surface of the heating pipeline damaged during welding with a polyepoxy anti-corrosion layer patch; S2: Start the cathodic protection status monitoring device and the cloud platform monitoring module; judge the corrosion protection status of the pipeline according to the data displayed by the cloud platform monitoring module; when the potential is lower than the preset value, the heating pipeline is in a fully protected state; when the potential is higher than the preset value, the heating pipeline is in an incompletely protected state.

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