Pipeline, pipeline assembly, manufacturing method of pipeline, installation method of pipeline assembly and operation control method of pipeline assembly

Abstract

The invention discloses a pipeline, a pipeline assembly, a manufacturing method of the pipeline, an installation method of the pipeline assembly and an operation control method of the pipeline assembly. The pipeline comprises a metal pipeline base body, a wiring piece, a reference electrode, an auxiliary anode and a monitoring device. The wiring piece is electrically connected with the outer wall surface of the base body; anti-corrosion insulating layers are formed on the inner surface of the substrate and the outer surfaces of two ends of the substrate; the reference electrode and the auxiliary anode are arranged on the anti-corrosion insulating layers on the outer surfaces of the two ends of the substrate; another anti-corrosion insulating layer is formed on the anti-corrosion insulating layers on the outer surfaces of the two ends of the base body, and the reference electrode and the auxiliary anode are arranged in the two anti-corrosion insulating layers in a sealing manner; the negative electrode of the monitoring device is electrically connected with the wiring piece, the positive electrode of the monitoring device is electrically connected with the wiring end of the reference electrode, and the monitoring device is used for monitoring whether the anti-corrosion insulating layer on the inner surface of the base body is damaged or not through the monitoring resistor. The interior of the base body has a corrosion-resistant function, and the integrity of the corrosion-resistant insulating layer on the inner surface of the base body can be monitored online in real time.

Description

Technical Field

[0001] This invention relates to the field of pipeline corrosion protection technology, and in particular to pipelines, pipeline components, pipeline manufacturing methods, pipeline component installation methods, and pipeline component operation control methods. Background Technology

[0002] In China, the final heat sinks of pressurized water reactor nuclear power plants are all seawater. Therefore, a large number of pipes within these plants are lined with seawater, which is highly corrosive. Ordinary metal pipes will corrode rapidly under the influence of seawater, leading to perforation and affecting the reliability of the system. Therefore, metal pipes used with seawater typically require anti-corrosion processes to isolate the metal from the seawater; common linings include rubber or plastic. However, the condition of the pipe lining can only be checked after the pipe is emptied, resulting in high maintenance costs. During operation, if the lining is damaged, the pipe will corrode and perforate rapidly, which maintenance personnel cannot detect in time, affecting the safe and stable operation of the system. Currently, there is a lack of online monitoring technology for pipe linings and online mitigation technology for corrosion after lining damage. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address at least one deficiency of the related technologies mentioned in the background: the current related technologies lack online monitoring technology for pipe linings, and to provide a pipe, a pipe assembly, a method for manufacturing the pipe, a method for installing the pipe assembly, and a method for controlling the operation of the pipe assembly.

[0004] The technical solution adopted by the present invention to solve its technical problem is: to construct a pipe, including a metal pipe base, connectors, a reference electrode, an auxiliary anode, and a monitoring device; The connector is electrically connected to the outer wall of the metal pipe substrate; the inner surface of the metal pipe substrate and the outer surfaces at both ends of the metal pipe substrate are all covered with an anti-corrosion and insulating layer. The reference electrode is disposed on the anti-corrosion insulating layer on the outer surface of one end of the metal pipe substrate, and the auxiliary anode is disposed on the anti-corrosion insulating layer on the outer surface of the other end of the metal pipe substrate, and neither the reference electrode nor the auxiliary anode is in contact with the metal pipe substrate. Another anti-corrosion insulating layer is formed on the anti-corrosion insulating layer on the outer surface of both ends of the metal pipe substrate, so as to seal the reference electrode and the auxiliary anode except for the wiring terminal and the non-wiring terminal in the two anti-corrosion insulating layers. The non-wiring terminal of the reference electrode and the auxiliary anode is used to contact the conductive medium. The negative terminal of the monitoring device is used to be electrically connected to the wiring component, and the positive terminal of the monitoring device is used to be electrically connected to the terminal of the reference electrode. The monitoring device is used to monitor whether the anti-corrosion insulation layer on the inner surface of the metal pipe substrate is damaged by monitoring the resistance.

[0005] In some embodiments, an adhesion layer is formed on the inner surface of the metal pipe substrate and on the outer surfaces of both ends of the metal pipe substrate, and the anti-corrosion and insulating layer is formed on the adhesion layer.

[0006] In some embodiments, the adhesion layer is a sandblasted layer; and / or, the anti-corrosion insulating layer is a coated ceramic layer.

[0007] In some embodiments, neither the reference electrode nor the non-connection terminal of the auxiliary anode protrudes from the inner surface of the metal pipe substrate.

[0008] In some embodiments, the conduit further includes an applied current device; The positive terminal of the applied current device is used to conductively connect with the terminal of the auxiliary anode, the negative terminal of the applied current device is used to conductively connect with the terminal block, and the applied current device is used to provide an applied protective current to the metal pipe substrate.

[0009] In some embodiments, the monitoring device is also used to monitor the potential when the applied current device provides an applied protective current to the metal pipe substrate.

[0010] The present invention also constructs a pipe assembly, including the pipe described in any of the above claims and an upstream component and a downstream component that are insulated from both ends of the metal pipe base; The negative terminal of the monitoring device is electrically connected to the wiring component, and the positive terminal of the monitoring device is electrically connected to the wiring terminal of the reference electrode.

[0011] The present invention also provides a method for manufacturing the pipe described in any of the above claims, comprising the following steps: S1-1: Conductively connect the connector to the outer wall surface of the metal pipe substrate; S2-1: The anti-corrosion and insulating layer is formed on the inner surface of the metal pipe substrate and on the outer surfaces of both ends of the metal pipe substrate; S3-1: The reference electrode is placed on the anti-corrosion insulation layer on the outer surface of one end of the metal pipe substrate, and the auxiliary anode is placed on the anti-corrosion insulation layer on the outer surface of the other end of the metal pipe substrate, and neither the reference electrode nor the auxiliary anode is in contact with the metal pipe substrate. S4-1: Another layer of the anti-corrosion insulation layer is formed on the outer surface of the anti-corrosion insulation layer at both ends of the metal pipe substrate, so as to seal the reference electrode and the auxiliary anode except for the wiring terminals and non-wiring terminals in the two layers of the anti-corrosion insulation layer. S5-1: Seal both ends of the metal pipe substrate and inject conductive medium into the interior of the metal pipe substrate. Detect whether the pipe is conductive by the terminals of the reference electrode and the auxiliary anode. If it is conductive, the pipe is manufactured.

[0012] The present invention also provides a method for installing the above-mentioned pipe assembly, comprising the following steps: S1-2: Insulate both ends of the metal pipe base from the upstream component and the downstream component; S2-2: Connect the negative terminal of the monitoring device to the wiring component in a conductive manner, and connect the positive terminal of the monitoring device to the wiring terminal of the reference electrode in a conductive manner.

[0013] The present invention also provides an operation control method for the above-mentioned pipeline assembly, comprising the following steps: S1-3: After the metal pipe substrate is filled with conductive medium, the monitoring device is turned on; S2-3: If the monitoring device detects that the anti-corrosion insulation layer on the inner surface of the metal pipe substrate is damaged, the pipe shall be replaced, or step S3-3 shall be executed. S3-3: Connect the positive terminal of the impressed current device to the terminal of the auxiliary anode, and connect the negative terminal of the impressed current device to the terminal block. The impressed current device provides an impressed protective current to the metal pipe substrate, and the cathodic protection status is evaluated by monitoring the potential through the monitoring device.

[0014] By implementing this invention, the following beneficial effects are achieved: This invention forms an anti-corrosion and insulating layer on the inner surface of the metal pipe substrate and on the outer surfaces of both ends of the metal pipe substrate, thereby giving the metal pipe substrate erosion and corrosion resistance. Furthermore, when the pipeline is actually transporting conductive media, the resistance can be monitored online in real time by a monitoring device to monitor the integrity of the anti-corrosion and insulating layer on the inner surface of the metal pipe substrate. This prevents pipeline corrosion and perforation caused by damage to the anti-corrosion and insulating layer on the inner surface of the metal pipe substrate, avoiding impacts on unit processing and nuclear safety, thus greatly improving the reliability of the pipeline. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 A structural diagram of one embodiment of the pipe of the present invention is shown; Figure 2 A flowchart illustrating an embodiment of the method for manufacturing the pipe of the present invention is shown; Figure 3 A flowchart illustrating an embodiment of the installation method for the pipe assembly of the present invention is shown; Figure 4 A flowchart illustrating an embodiment of the operation control method for the pipeline assembly of the present invention is shown; The reference numerals in the attached figures are as follows: 1. Metal pipe substrate; 11. Anti-corrosion insulation layer; 12. Connector; 13. Through hole; 2. Wiring component; 3. Reference electrode; 4. Auxiliary anode; 5. Monitoring device; 6. Impressed current device. Detailed Implementation

[0016] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0018] In the description of this invention, it should be understood that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "fixed," "connected," "linked," "located in," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection (or an integral structure), a detachable connection, a mechanical connection, a chemical connection, a direct connection, or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] like Figure 1 As shown, some embodiments of the present invention disclose a pipe, including a metal pipe substrate 1, a connector 2, a reference electrode 3, an auxiliary anode 4, and a monitoring device 5, as detailed below: The connector 2 is electrically connected to the outer wall of the metal pipe substrate 1. An anti-corrosion insulating layer 11 is formed on the inner surface of the metal pipe substrate 1 and on the outer surfaces of both ends of the metal pipe substrate 1.

[0021] The reference electrode 3 is disposed on the anti-corrosion insulation layer 11 on the outer surface of one end of the metal pipe substrate 1, and the auxiliary anode 4 is disposed on the anti-corrosion insulation layer 11 on the outer surface of the other end of the metal pipe substrate 1. Neither the reference electrode 3 nor the auxiliary anode 4 is in contact with the metal pipe substrate 1, thus maintaining an electrical insulation state.

[0022] Another anti-corrosion insulating layer 11 is formed on the anti-corrosion insulating layer 11 on the outer surface of both ends of the metal pipe substrate 1, so as to seal the reference electrode 3 and the auxiliary anode 4 except for the wiring terminal and the non-wiring terminal in the two anti-corrosion insulating layers 11. The non-wiring terminal of the reference electrode 3 and the auxiliary anode 4 is used to contact the conductive medium.

[0023] The negative terminal of the monitoring device 5 is used for conductive connection with the connector 2, and the positive terminal of the monitoring device 5 is used for conductive connection with the terminal of the reference electrode 3. The monitoring device 5 is used to monitor whether the anti-corrosion insulation layer 11 on the inner surface of the metal pipe substrate 1 is damaged by monitoring resistance. Specifically, when the anti-corrosion insulation layer 11 on the inner surface of the metal pipe substrate 1 is damaged, the conductive medium inside the pipe will come into direct contact with the metal pipe substrate 1, and the non-connection terminal of the reference electrode 3 will also come into contact with the conductive medium. Therefore, a circuit will be formed between the connector 2, the reference electrode 3, and the conductive medium, and the monitoring device 5 will detect a decrease in resistance. When the anti-corrosion insulation layer 11 on the inner surface of the metal pipe substrate 1 is intact, the monitoring device 5 detects that the reference electrode 3 and the connector 2 are in an insulating state.

[0024] This invention provides the metal pipe substrate 1 with anti-corrosion and insulation layers 11 formed on the inner surface of the metal pipe substrate 1 and the outer surfaces of both ends of the metal pipe substrate 1, thereby giving the metal pipe substrate 1 erosion and corrosion resistance. Furthermore, when the pipeline is actually transporting conductive media, the resistance can be monitored in real time online by the monitoring device 5 to monitor the integrity of the anti-corrosion and insulation layer 11 on the inner surface of the metal pipe substrate 1. This prevents pipeline corrosion and perforation caused by damage to the anti-corrosion and insulation layer 11 on the inner surface of the metal pipe substrate 1, avoiding impact on unit processing and nuclear safety, and thus greatly improving the reliability of the pipeline.

[0025] In some embodiments, the metal pipe substrate 1 is the same as that in a pressurized water reactor nuclear power plant, used to transport seawater, which is highly corrosive. For example, the metal pipe substrate 1 is made of carbon steel or low-alloy steel.

[0026] In some embodiments, the metal pipe substrate 1 is a tubular hollow structure, with its inner surface being the inner wall surface of the hollow section, and the outer surfaces of the two ends of the metal pipe substrate 1 facing away from each other.

[0027] In some embodiments, the metal pipe base 1 has connectors 12 at both ends, and the outer surfaces of the two ends of the metal pipe base 1 are the outer surfaces of the connectors 12 at both ends of the metal pipe base 1. For example, the metal pipe base 1 and the connectors 12 are an integral structure, and the connectors 12 are flanges.

[0028] In some embodiments, the connector 2 is entirely made of metal. In other embodiments, a portion of the connector 2 is made of metal, and this metal portion is in direct contact with the outer wall of the metal pipe base 1. The metal material of the connector 2 may be the same as or different from the metal material of the metal pipe base 1, as long as they are electrically connected.

[0029] In some embodiments, such as Figure 1 As shown, the connector 2 is columnar and is welded to the middle position of the outer wall of the metal pipe base 1. It should be noted that the middle position, welding, and columnar shape are merely examples and are not intended to limit this application. Other installation positions, installation methods, and shapes are also possible, such as positions near the ends, integral molding, and strip shapes.

[0030] In some embodiments, an adhesion layer (not shown) is formed on the inner surface of the metal pipe substrate 1 and on the outer surfaces of both ends of the metal pipe substrate 1, and an anti-corrosion insulating layer 11 is formed on the adhesion layer. Understandably, the anti-corrosion insulating layer 11 covers all or part of the outer surfaces of both ends of the metal pipe substrate 1. Furthermore, the adhesion layer and the anti-corrosion insulating layer 11 are continuous (or integral), without gaps or holes.

[0031] In some embodiments, the adhesion layer is a sandblasted layer, for example, sandblasting to Sa2.5 level. Sa2.5 level (near-white level) is one of several levels defined in the ISO 8501-1 standard, which will not be elaborated further here. Moreover, the sandblasted layer here is only an example and is not intended to be the only limitation of this application; it can also be an adhesion layer of other materials.

[0032] The anti-corrosion insulation layer 11 is a coated ceramic layer with a thickness of 3mm-5mm. The ceramic coating used here is merely an example and is not intended to limit this application; other materials can also be used for the anti-corrosion insulation layer 11. By employing a special ceramic coating process, high adhesion coating is achieved inside the pipeline, and it possesses erosion resistance and acid and alkali resistance.

[0033] The formation of the adhesion layer thoroughly cleans contaminants from the pipe surface, such as scale, rust, oil, and grease. It also creates an anchor pattern, producing uniform, minute irregularities on a smooth surface. During curing, the ceramic coating penetrates and "locks" into these tiny pits, forming a strong mechanical bond. Ceramic coatings typically have high hardness and relatively low toughness; a surface with suitable roughness disperses stress on the coating, greatly enhancing its adhesion and preventing peeling due to substrate expansion and contraction or external impact. Furthermore, the adhesion layer ensures uniform and controllable cleanliness and roughness across every corner of the inner and outer surfaces of the entire metal pipe substrate 1. This is crucial for ensuring the uniformity and predictability of coating quality, preventing premature localized failure due to inconsistent surface conditions. Therefore, the adhesion layer ensures that the anti-corrosion insulation layer 11 adheres firmly and permanently to the inner and outer surfaces of the metal pipe substrate 1, maximizing its protective performance.

[0034] In some embodiments, the reference electrode 3 and the auxiliary anode 4 each include a main body and terminals and non-terminals located at both ends of the main body. The main bodies of the reference electrode 3 and the auxiliary anode 4 are sealed in two layers of anti-corrosion insulation layer 11, and the terminals and non-terminals of the reference electrode 3 and the auxiliary anode 4 are exposed.

[0035] In some embodiments, such as Figure 1 As shown, the non-connected terminals of the reference electrode 3 and the auxiliary anode 4 do not protrude from the inner surface of the metal pipe substrate 1. That is, the placement of the reference electrode 3 and the auxiliary anode 4 must ensure that they do not penetrate deep into the interior of the metal pipe substrate 1, preventing damage from the impact of the flowing medium within the pipe. For example, the non-connected terminals of the reference electrode 3 and the auxiliary anode 4 can be flush with the inner surface of the metal pipe substrate 1.

[0036] In some embodiments, such as Figure 1 As shown, for ease of wiring, the terminals of the reference electrode 3 and the auxiliary anode 4 both protrude from the outer wall of the metal pipe substrate 1.

[0037] In some embodiments, the reference electrode 3 is a silver / silver chloride electrode or a zinc electrode, etc., and the auxiliary anode 4 is a high-silicon cast iron, graphite or mixed metal oxide anode. These are just examples and are not intended to limit the scope of this application. Others may also be used.

[0038] In some embodiments, such as Figure 1 As shown, for ease of observation, the monitoring device 5 is installed on the outer wall of the metal pipe base 1, for example, by means of a clamp.

[0039] In some embodiments, the monitoring device 5 includes an alert module, such as an audible and visual alarm module, for alerting when the anti-corrosion insulation layer 11 on the inner surface of the metal pipe substrate 1 is detected to be damaged, such as issuing an audible and visual alarm to inform the equipment maintenance personnel that the anti-corrosion insulation layer 11 on the inner surface of the metal pipe substrate 1 has failed.

[0040] In some embodiments, such as Figure 1 As shown, in order to perform online corrosion mitigation treatment on the damaged anti-corrosion insulation layer 11 without disassembling the pipeline, the pipeline also includes an impressed current device 6. The positive terminal of the impressed current device 6 is used to conductively connect to the terminal of the auxiliary anode 4, and the negative terminal of the impressed current device 6 is used to conductively connect to the connector 2. The impressed current device 6 is used to provide an impressed protective current to the metal pipeline substrate 1. Through online corrosion mitigation treatment, pipeline maintenance costs can be reduced.

[0041] In some embodiments, such as Figure 1 As shown, the impressed current device 6 is installed on the outer wall of the metal pipe base 1. For example, the impressed current device 6 is installed on the outer wall of the metal pipe base 1 by means of a clamp.

[0042] In some embodiments, the monitoring device 5 is also used to monitor the potential when the applied current device 6 provides an applied protective current to the metal pipe substrate 1.

[0043] like Figure 2 As shown, some embodiments of the present invention disclose a method for manufacturing the pipe described in the above embodiments, comprising the following steps: S1-1: Connect the connector 2 to the outer wall of the metal pipe base 1 in an conductive manner; S2-1: An anti-corrosion and insulating layer 11 is formed on the inner surface of the metal pipe substrate 1 and on the outer surfaces of both ends of the metal pipe substrate 1; S3-1: Place the reference electrode 3 on the anti-corrosion insulation layer 11 on the outer surface of one end of the metal pipe substrate 1, and place the auxiliary anode 4 on the anti-corrosion insulation layer 11 on the outer surface of the other end of the metal pipe substrate 1, ensuring that neither the reference electrode 3 nor the auxiliary anode 4 is in contact with the metal pipe substrate 1. S4-1: Another anti-corrosion insulation layer 11 is formed on the anti-corrosion insulation layer 11 on the outer surface of both ends of the metal pipe substrate 1, so as to seal the reference electrode 3 and the auxiliary anode 4 except for the wiring terminals and non-wiring terminals in the two anti-corrosion insulation layers 11. S5-1: Seal both ends of the metal pipe substrate 1 and inject conductive medium into the interior of the metal pipe substrate 1. Check whether the circuit is conductive by the terminals of the reference electrode 3 and the auxiliary anode 4. If the circuit is conductive, the pipe is completed.

[0044] In some embodiments, step S1-1 includes welding the terminal block to the middle part of the outer wall of the metal pipe substrate 1.

[0045] In some embodiments, step S2-1 includes: forming an adhesion layer on the inner surface of the metal pipe substrate 1 and the outer surfaces at both ends of the metal pipe substrate 1, and forming an anti-corrosion insulating layer 11 on the adhesion layer. Specifically, this includes: sandblasting the inner surface of the metal pipe substrate 1 and the outer surfaces at both ends of the metal pipe substrate 1 to form an adhesion layer, and applying an anti-corrosion insulating coating to the adhesion layer to form the anti-corrosion insulating layer 11.

[0046] In some embodiments, step S3-1 includes: after the coating is completed, placing the reference electrode 3 on the anti-corrosion insulating layer 11 on the outer surface of the connector 12 at one end of the metal pipe substrate 1, and placing the auxiliary anode 4 on the anti-corrosion insulating layer 11 on the outer surface of the connector 12 at the other end of the metal pipe substrate 1, such that neither the reference electrode 3 nor the auxiliary anode 4 contacts the metal pipe substrate 1.

[0047] In some embodiments, step S3-1 further includes: ensuring that the non-connected terminals of the reference electrode 3 and the auxiliary anode 4 do not protrude from the inner surface of the metal pipe substrate 1. Specifically, this includes: ensuring that the non-connected terminals of the reference electrode 3 and the auxiliary anode 4 are flush with the inner surface of the metal pipe substrate 1.

[0048] In some embodiments, step S3-1 further includes: making the terminals of the reference electrode 3 and the auxiliary anode 4 protrude from the outer wall surface of the metal pipe substrate 1.

[0049] In some embodiments, step S4-1 includes: applying another layer of ceramic coating to the anti-corrosion insulating layer 11 on the outer surface of the connectors 12 at both ends of the metal pipe substrate 1 to form another anti-corrosion insulating layer 11, so as to seal the reference electrode 3 and the auxiliary anode 4, except for the terminals and non-terminals, within the two layers of anti-corrosion insulating layers 11. Specifically, after the ceramic coating has cured, it is checked whether the main body of the reference electrode 3 and the auxiliary anode 4 is sealed and nested in the ceramic coating, that is, the junction between the electrode and the anti-corrosion insulating layer 11 is well sealed and leak-free, so as to avoid leakage of the medium in the pipeline.

[0050] In some embodiments, step S5-1 includes: installing blind flanges at both ends of the metal pipe substrate 1 and injecting a conductive medium into the interior of the metal pipe substrate 1; detecting continuity through the terminals of the reference electrode 3 and the auxiliary anode 4; if continuity is detected, the pipe fabrication is complete. After the conductive medium is injected, it contacts the non-terminal terminals of the reference electrode 3 and the auxiliary anode 4. Therefore, if continuity is detected through the terminals of the reference electrode 3 and the auxiliary anode 4, the pipe fabrication is complete and qualified. For example, the conductive medium is seawater, specifically a conductive medium with a conductivity greater than 1 S / m.

[0051] Some embodiments of the present invention disclose a pipe assembly, including the pipe described in the above embodiments and an upstream component and a downstream component that are insulated from both ends of a metal pipe base 1.

[0052] In some embodiments, through holes 13 are provided at both ends of the pipe (specifically, the connector 12), the upstream component, and the downstream component. The two ends of the pipe are fixed to the upstream and downstream components via fastening assemblies in the through holes 13. A first insulating sleeve is provided between the through hole 13 and the fastening assembly. Specifically, the fastening assembly includes bolts and nuts. The bolts pass through the through holes 13 at both ends of the pipe, the upstream component, and the downstream component, and are fixed by the nuts. A first insulating sleeve is provided between the bolts and the through holes 13. For example, the first insulating sleeve is a silicone sleeve. The silicone sleeve mentioned here is only an example and is not intended to limit this application; other types are also possible.

[0053] In some embodiments, the upstream component is an upstream pipe or an upstream support, and the downstream component is a downstream pipe or a downstream support.

[0054] In some embodiments, where the anti-corrosion insulation layer 11 is not formed on certain portions of the outer surfaces at both ends of the pipe, a second insulating sleeve is provided between these portions and the upstream and downstream components. This second insulating sleeve prevents direct contact between the outer surfaces of the pipe ends and the upstream and downstream components, thus achieving electrical insulation. For example, the second insulating sleeve may be a silicone sleeve. This is merely an example and not the only limitation of this application; other types are also possible.

[0055] like Figure 3 As shown, some embodiments of the present invention disclose an installation method for the pipe assembly described in the above embodiments, comprising the following steps: S1-2: Insulate both ends of the metal pipe base 1 from the upstream and downstream components; S2-2: Connect the negative terminal of the monitoring device 5 to the wiring component 2, and connect the positive terminal of the monitoring device 5 to the wiring terminal of the reference electrode 3.

[0056] In some embodiments, steps S1-2 include: securing the pipe at both ends, the upstream component, and the downstream component using a fastening assembly, and providing a first insulating sleeve between the through hole 13 and the fastening assembly. Specifically, this includes: passing bolts through the through holes 13 at both ends, the upstream component, and the downstream component, and securing them with nuts, with a first insulating sleeve between the bolts and the through hole 13.

[0057] In some embodiments, step S1-2 further includes: setting a second insulating sleeve between the portion of the outer surface of both ends of the pipe where the anti-corrosion insulating layer 11 has not been formed and the upstream and downstream components.

[0058] In some embodiments, step S2-2 further includes: installing the monitoring device 5 on the outer wall of the metal pipe base 1, for example by using a clamp to install the monitoring device 5 on the outer wall of the metal pipe base 1.

[0059] like Figure 4 As shown, some embodiments of the present invention disclose an operation control method for the pipeline assembly described in the above embodiments, comprising the following steps: S1-3: After the metal pipe substrate 1 is filled with conductive medium, turn on the monitoring device 5; S2-3: If the monitoring device 5 detects that the anti-corrosion insulation layer 11 on the inner surface of the metal pipe substrate 1 is damaged, the pipe shall be replaced, or step S3-3 shall be executed, that is, the cathodic protection function of the pipe shall be activated. S3-3: Connect the positive terminal of the impressed current device 6 to the terminal of the auxiliary anode 4, and connect the negative terminal of the impressed current device 6 to the terminal 2. The impressed current device 6 provides an impressed protective current to the metal pipe substrate 1, and the cathodic protection status is evaluated by monitoring the potential through the monitoring device 5.

[0060] If the damaged lining of the pipe cannot be repaired or replaced in a short time, cathodic protection can be formed between the auxiliary anode 4, the conductive medium and the metal pipe substrate 1 by the external current device 6. The protected metal pipe substrate 1 will be polarized to a corrosion-resistant potential zone (i.e., a cathode in the electrochemical sense), so that it cannot undergo an oxidation reaction that loses electrons (i.e., corrosion), thereby slowing down the corrosion rate of the pipe and extending its service life.

[0061] In some embodiments, step S3-3 further includes: mounting the applied current device 6 on the outer wall of the metal pipe base 1. For example, the applied current device 6 is mounted on the outer wall of the metal pipe base 1 by means of a clamp.

[0062] In other embodiments, the monitoring device 5 can be divided into a resistance monitoring device and a potential monitoring device. The resistance monitoring device is used to monitor whether the anti-corrosion insulation layer 11 on the inner surface of the metal pipe substrate 1 is damaged by monitoring the resistance. The potential monitoring device is used to monitor the potential when the applied current device 6 provides an applied protective current to the pipe.

[0063] Accordingly, step S3-3 above can be replaced with the following steps: S3-3: Remove the resistance monitoring device, connect the positive terminal of the potential monitoring device to the terminal of the reference electrode 3, connect the negative terminal of the potential monitoring device to the terminal block 2, connect the positive terminal of the applied current device 6 to the terminal of the auxiliary anode 4, connect the negative terminal of the applied current device 6 to the terminal block 2, the applied current device 6 provides an applied protective current to the metal pipe substrate 1, and evaluates the cathodic protection status by monitoring the potential through the potential monitoring device.

[0064] It is understood that the above embodiments only illustrate some implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above embodiments or technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. That is, the embodiments described "in some embodiments" can be freely combined with any of the preceding and following embodiments. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.

Claims

1. A pipe, characterized in that, It includes a metal pipe substrate (1), a connector (2), a reference electrode (3), an auxiliary anode (4), and a monitoring device (5); The connector (2) is electrically connected to the outer wall of the metal pipe substrate (1); the inner surface of the metal pipe substrate (1) and the outer surfaces at both ends of the metal pipe substrate (1) are all covered with an anti-corrosion insulating layer (11). The reference electrode (3) is disposed on the anti-corrosion insulating layer (11) on the outer surface of one end of the metal pipe substrate (1), and the auxiliary anode (4) is disposed on the anti-corrosion insulating layer (11) on the outer surface of the other end of the metal pipe substrate (1). Neither the reference electrode (3) nor the auxiliary anode (4) is in contact with the metal pipe substrate (1). Another anti-corrosion insulating layer (11) is formed on the anti-corrosion insulating layer (11) on the outer surface of both ends of the metal pipe substrate (1) to seal the reference electrode (3) and the auxiliary anode (4) except for the wiring terminal and the non-wiring terminal in the two anti-corrosion insulating layers (11). The non-wiring terminal of the reference electrode (3) and the auxiliary anode (4) is used to contact the conductive medium. The negative terminal of the monitoring device (5) is used to be electrically connected to the wiring component (2), and the positive terminal of the monitoring device (5) is used to be electrically connected to the terminal of the reference electrode (3). The monitoring device (5) is used to monitor whether the anti-corrosion insulation layer (11) on the inner surface of the metal pipe substrate (1) is damaged by monitoring the resistance.

2. The pipeline according to claim 1, characterized in that, An adhesion layer is formed on the inner surface of the metal pipe substrate (1) and the outer surfaces at both ends of the metal pipe substrate (1), and the anti-corrosion insulation layer (11) is formed on the adhesion layer.

3. The pipeline according to claim 2, characterized in that, The adhesion layer is a sandblasted layer; and / or, the anti-corrosion insulation layer (11) is a coated ceramic layer.

4. The pipeline according to claim 1, characterized in that, The non-connection terminals of the reference electrode (3) and the auxiliary anode (4) do not protrude from the inner surface of the metal pipe substrate (1).

5. The pipeline according to claim 1, characterized in that, The pipeline also includes an external current device (6). The positive terminal of the applied current device (6) is used to be electrically connected to the terminal of the auxiliary anode (4), the negative terminal of the applied current device (6) is used to be electrically connected to the terminal (2), and the applied current device (6) is used to provide an applied protective current to the metal pipe substrate (1).

6. The pipeline according to claim 5, characterized in that, The monitoring device (5) is also used to monitor the potential when the applied current device (6) provides an applied protective current to the metal pipe substrate (1).

7. A pipe assembly, characterized in that, Includes the pipe as described in any one of claims 1-6, and upstream and downstream components that are insulated from both ends of the metal pipe base (1); The negative terminal of the monitoring device (5) is electrically connected to the connector (2), and the positive terminal of the monitoring device (5) is electrically connected to the terminal of the reference electrode (3).

8. A method for manufacturing a pipe according to any one of claims 1-6, characterized in that, Includes the following steps: S1-1: Connect the connector (2) to the outer wall of the metal pipe substrate (1) in an conductive manner; S2-1: The anti-corrosion insulation layer (11) is formed on the inner surface of the metal pipe substrate (1) and on the outer surfaces of both ends of the metal pipe substrate (1). S3-1: The reference electrode (3) is placed on the anti-corrosion insulation layer (11) on the outer surface of one end of the metal pipe substrate (1), and the auxiliary anode (4) is placed on the anti-corrosion insulation layer (11) on the outer surface of the other end of the metal pipe substrate (1), and neither the reference electrode (3) nor the auxiliary anode (4) is in contact with the metal pipe substrate (1); S4-1: Another layer of the anti-corrosion insulation layer (11) is formed on the outer surface of the anti-corrosion insulation layer (11) at both ends of the metal pipe substrate (1) to seal the reference electrode (3) and the auxiliary anode (4) except for the wiring terminals and non-wiring terminals in the two layers of the anti-corrosion insulation layer (11). S5-1: Seal both ends of the metal pipe substrate (1) and inject conductive medium into the interior of the metal pipe substrate (1). Detect whether the pipe is conductive by the terminals of the reference electrode (3) and the auxiliary anode (4). If it is conductive, the pipe is manufactured.

9. A method for installing the pipe assembly as described in claim 7, characterized in that, Includes the following steps: S1-2: Insulate both ends of the metal pipe base (1) from the upstream component and the downstream component; S2-2: Connect the negative terminal of the monitoring device (5) to the connector (2) and connect the positive terminal of the monitoring device (5) to the terminal of the reference electrode (3).

10. A method for controlling the operation of a pipeline assembly as described in claim 7, characterized in that, Includes the following steps: S1-3: After the metal pipe substrate (1) is filled with conductive medium, turn on the monitoring device (5). S2-3: If the monitoring device (5) detects that the anti-corrosion insulation layer (11) on the inner surface of the metal pipe substrate (1) is damaged, the pipe shall be replaced, or step S3-3 shall be executed. S3-3: Connect the positive terminal of the applied current device (6) to the terminal of the auxiliary anode (4) and connect the negative terminal of the applied current device (6) to the terminal (2). The applied current device (6) provides an applied protection current to the metal pipe substrate (1) and monitors the potential through the monitoring device (5) to evaluate the cathodic protection status.

Images