Pipeline corrosion prevention and heat preservation system

Abstract

The invention relates to the technical field of chemical pipelines, and discloses a pipeline corrosion prevention and heat preservation system which comprises a heat preservation layer, a corrosion prevention coating, a heat preservation failure monitoring module, a descaling module and a corrosion alarm module. The heat preservation layer is arranged on the inner wall of the pipeline and fixedly connected with the inner wall of the pipeline. The outer peripheral wall of the pipeline is coated with the anti-corrosion coating. The heat-insulation failure monitoring module is used for monitoring whether the heat-insulation condition of the pipeline heat-insulation layer fails or not. The method is used for dispatching maintenance personnel to maintain the pipeline with the invalid heat preservation layer. And the descaling module is used for descaling the interior of the pipeline. The corrosion alarm module is used for monitoring the corrosion condition of the anti-corrosion coating of the pipeline. The alarm is used for giving an alarm. By arranging the heat preservation layer, the anti-corrosion coating, the heat preservation failure monitoring module, the descaling module and the corrosion alarm module, when the heat preservation situation of the heat preservation layer of the pipeline is monitored to be invalid, a maintainer is dispatched to maintain the pipeline, and when it is monitored that the anti-corrosion coating is seriously corroded, an alarm is given out, and meanwhile the interior of the pipeline is descaled.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical pipelines, and in particular to a pipeline anti-corrosion and heat insulation system. Background Art

[0002] In traditional pipelines, when the fluid transported inside the pipeline flows, it is inevitable that as time increases, the fluid temperature decreases, affecting production efficiency and product quality. The prior art usually sets a heat insulation layer on the inner wall of the pipeline to maintain the stability of the internal temperature of the pipeline. However, the heat insulation layer will gradually lose its heat insulation effect due to wear or external environmental erosion. Due to the lack of effective monitoring means, it is often difficult to detect the performance degradation of the heat insulation layer in a timely manner, and it is impossible to solve the pipeline problem in a timely manner. For pipelines transporting flammable or explosive media, the failure of heat insulation may cause the temperature of the medium to rise, increasing the leakage risk, which may lead to fire or explosion accidents. In addition, the failure of the heat insulation layer may also accelerate the corrosion process of the outer wall of the pipeline, further shortening the service life of the pipeline. During the process of transporting fluid media, due to the physical and chemical properties of the fluid and the material characteristics of the inner wall of the pipeline, a scale layer is often formed inside the pipeline. The presence of the scale layer will not only increase the resistance of fluid flow, reduce the transportation efficiency, but also accelerate the corrosion and wear of the pipeline. Traditional descaling methods often require manual operation, which is not only time-consuming and laborious, but also difficult to completely remove the scale layer. The anti-corrosion coating is an important barrier to protect the pipeline from corrosion erosion. However, in traditional pipeline anti-corrosion, the monitoring of the anti-corrosion coating is often insufficient. Once the anti-corrosion coating is damaged or aged, it is often difficult to detect and handle in a timely manner, resulting in the pipeline being quickly eroded by corrosion, increasing the risk of pipeline leakage and safety accidents. Therefore, a pipeline anti-corrosion and heat insulation system is proposed. Summary of the Invention

[0003] The technical problem to be solved by the present invention is how to dispatch maintenance personnel to repair the pipeline when the heat insulation of the pipeline heat insulation layer fails, and when it is detected that the anti-corrosion coating is severely corroded, to issue an alarm and descale the inside of the pipeline at the same time, and provide a pipeline anti-corrosion and heat insulation system.

[0004] The technical solution adopted by the present invention to solve its technical problems is a pipeline anti-corrosion and heat insulation system, including a heat insulation layer, an anti-corrosion coating, a heat insulation failure monitoring module, a descaling module, and a corrosion alarm module. The heat insulation layer is arranged on the inner wall of the pipeline and is fixedly connected to the inner wall of the pipeline. The anti-corrosion coating is coated on the outer peripheral wall of the pipeline. The heat insulation failure monitoring module is used to monitor whether the heat insulation of the pipeline heat insulation layer fails. It is used to dispatch maintenance personnel to repair the pipeline with a failed heat insulation layer. The descaling module is used to descale the inside of the pipeline. The corrosion alarm module is used to monitor the corrosion condition of the anti-corrosion coating. It is used to issue an alarm.

[0005] Through the setting of the thermal insulation layer, heat loss can be effectively reduced, the temperature inside the pipeline can be maintained stable, and the energy utilization efficiency can be significantly improved and energy consumption can be reduced when transporting high-temperature or low-temperature fluids. The anti-corrosion coating is applied to the outer peripheral wall of the pipeline to form a barrier layer, effectively resisting the erosion of moisture, oxygen, chemical substances, etc. in the external environment to the pipeline, extending the service life of the pipeline, and reducing leakage and maintenance costs caused by corrosion. Through the setting of the thermal insulation failure monitoring module, the thermal insulation performance of the thermal insulation layer is monitored in real time. When the detection of the thermal insulation effect fails, maintenance personnel are promptly dispatched to repair the pipeline with the failed thermal insulation layer, avoiding the aggravation of heat loss and ensuring the normal pipeline transportation function. The descaling module reduces the difficulty of manual cleaning of the pipeline interior, effectively removes the scale on the inner wall of the pipeline, keeps the pipeline smooth, improves the fluid transmission efficiency, and reduces pipeline blockage. The corrosion alarm module monitors the corrosion condition of the anti-corrosion coating, promptly discovers the damage condition of the coating, emits an alarm signal, reminds the management personnel to take preventive measures or perform repairs, and prevents the further development of corrosion.

[0006] Furthermore, the thermal insulation failure monitoring module includes a temperature processor, a first temperature sensor, a second temperature sensor, an input screen, and a mobile phone App. The input screen is set in the pipeline monitoring center and is used for the management personnel to input the density of the thermal insulation layer material, the total covered area of the thermal insulation layer, and the thermal conductivity of the thermal insulation layer material measured in advance, and then sends the density of the thermal insulation layer material, the total covered area of the thermal insulation layer, and the thermal conductivity of the thermal insulation layer material to the temperature processor. The first temperature sensor is set on the outer wall of the pipeline and is used for measuring the external environment temperature and sending the external environment temperature to the temperature processor. The second temperature sensor is set on the pipeline thermal insulation layer and is used for measuring the internal temperature of the pipeline and sending the internal temperature of the pipeline to the temperature processor. The temperature processor is set in the pipeline monitoring center and is communicatively connected to the input screen and the second temperature sensor. It is used for calculating the thermal insulation efficiency through the density of the thermal insulation layer material, the total covered area of the thermal insulation layer, the external environment temperature, the internal temperature of the pipeline, and the thermal conductivity of the thermal insulation layer material after receiving the density of the thermal insulation layer material, the total covered area of the thermal insulation layer, the external environment temperature, the internal temperature of the pipeline, and the thermal conductivity of the thermal insulation layer material. It is used for generating pipeline thermal insulation layer failure information and sending it to the mobile phone App when the thermal insulation efficiency is lower than the preset thermal insulation efficiency. The mobile phone App is set on the maintenance personnel's mobile terminal and is communicatively connected to the temperature processor. It is used for displaying the pipeline thermal insulation layer failure information and dispatching the maintenance personnel to perform repairs after receiving the pipeline thermal insulation layer failure information.

[0007] Furthermore, the calculation formula for the thermal insulation efficiency is:

[0008]

[0009] where, P is the thermal insulation efficiency, ρ is the density of the thermal insulation layer material, with the unit of kg / m 3 ³, S is the total covered area of the thermal insulation layer, with the unit of m2 , T 1 is the external environmental temperature, in °C, T 2 is the internal temperature of the pipeline, in °C, and J is the thermal conductivity of the insulation material, in W / m·K.

[0010] For example, the insulation material is rigid polyurethane with a density of 40 kg / m 3 , and the total area covered by the pre-measured insulation layer is 10 m 2 . When the external environmental temperature is -5°C, the internal temperature of the pipeline is 60°C, and the thermal conductivity is 0.03 W / m·K, the calculated insulation efficiency is approximately 0.86.

[0011] Furthermore, the anti-corrosion coating is an alloy anti-corrosion coating.

[0012] Alloy coatings usually have high hardness and wear resistance, which enable the coating to better resist mechanical wear and scratches and extend the service life of the coating.

[0013] Furthermore, the descaling module includes an ultrasonic transmitter, an ultrasonic receiver, an electronic timer, a scaling processor, and several ultrasonic vibrators. The input screen is used for the management personnel to input the pre-measured pipeline length and then send the pipeline length to the scaling processor. The temperature processor is used to send the total area covered by the thermal insulation layer to the scaling processor after receiving it. The ultrasonic transmitter is arranged on the outer wall of the pipeline, and its emission direction points to the inside of the pipeline, and is used to intermittently emit ultrasonic waves into the pipeline. When emitting ultrasonic waves, it sends a first transmission signal to the electronic timer. The ultrasonic receiver is arranged at the center of the pipeline interior, fixedly connected to the pipeline through a support frame, and its receiving direction corresponds to the emission direction of the ultrasonic transmitter. When receiving ultrasonic waves, it sends a second transmission signal to the electronic timer. The electronic timer is arranged on the ultrasonic transmitter, communicatively connected to the ultrasonic transmitter and the ultrasonic receiver, and is used to record the time difference between the emission and reception of the ultrasonic waves after receiving the first transmission signal and the second transmission signal, and then obtain the time for the ultrasonic waves to pass through the pipeline, the thermal insulation layer, and the scale, and send the time for the ultrasonic waves to pass through the pipeline, the thermal insulation layer, and the scale to the scaling processor. The scaling processor is arranged in the pipeline monitoring center, communicatively connected to the temperature processor, the electronic timer, and the input screen, and is used to calculate the scaling influence index through the preset propagation speed of ultrasonic waves in the thermal insulation layer, the time for the ultrasonic waves to pass through the pipeline, the thermal insulation layer, and the scale, the pipeline length, and the total area covered by the thermal insulation layer after receiving the time for the ultrasonic waves to pass through the pipeline, the thermal insulation layer, and the scale, the pipeline length, and the total area covered by the thermal insulation layer. When the scaling influence index is greater than the preset scaling influence index, it starts several ultrasonic vibrators for a period of time. The several ultrasonic vibrators are evenly spaced on the outer wall of the pipeline and are used to generate ultrasonic waves. The ultrasonic waves penetrate the pipeline wall and the thermal insulation layer and enter the pipeline interior. The high-frequency vibration of the ultrasonic waves crushes and removes the scale layer and removes the dirt on the inner wall of the pipeline.

[0014] The oscillator inside the ultrasonic transmitter oscillates and emits ultrasonic waves under the action of a pulsed electrical signal. The ultrasonic waves propagate linearly in the pipeline internal medium thermal insulation layer and are reflected when encountering obstacles such as the scaling layer. The reflected ultrasonic waves are received by the ultrasonic transmitter and converted into electrical signals for processing. At this time, the electronic timer stops timing, and the time for the ultrasonic waves to pass through the pipeline, the thermal insulation layer, and the scale is obtained through the time difference between the emission and reception of the ultrasonic waves. The several ultrasonic vibrators effectively crush and remove the scaling on the inner wall of the pipeline by using the high-frequency vibration they generate.

[0015] Furthermore, the calculation formula for the scaling influence index is:

[0016]

[0017] Among them, K is the fouling influence index, c is the preset propagation speed of ultrasonic waves in the insulation layer, with the unit of m / s, Δt is the time for ultrasonic waves to pass through the pipeline, insulation layer, and scale, with the unit of s, and L is the pipeline length, with the unit of m.

[0018] For example, in a cylindrical pipeline with a length of 10 m and a diameter of 0.3 m, the insulation layer uniformly wraps the pipeline. The total covered area of the insulation layer is the lateral area of the pipeline, approximately 10 m 2 . If the insulation layer material is rigid polyurethane, the preset propagation speed of ultrasonic waves in the insulation layer is 2000 m / s, and the time for ultrasonic waves to pass through the pipeline, insulation layer, and scale is 10 μs, that is, 0.00001 s. The calculated fouling influence index is approximately 0.06.

[0019] Furthermore, several ultrasonic vibrators are bolt - connected to the outer wall of the pipeline.

[0020] The bolt connection has excellent anti - vibration performance, can effectively resist the impact of natural forces such as earthquakes on the pipeline, ensures the stability of the ultrasonic vibrator on the pipeline in harsh environments, and is not easy to fall off.

[0021] Furthermore, the corrosion alarm module includes a corrosion processor, a humidity sensor, and an alarm. The input screen is used for the management personnel to input the pre - measured anti - corrosion coating thickness, the soil resistivity around the pipeline, and the potential difference between the outer wall of the pipeline and the anti - corrosion coating, and then send the anti - corrosion coating thickness, the soil resistivity around the pipeline, and the potential difference between the outer wall of the pipeline and the anti - corrosion coating to the corrosion processor. The temperature processor is used to send the external environmental temperature to the corrosion processor after receiving it. The humidity sensor is set on the soil surface to measure the external environmental humidity and send it to the corrosion processor. The corrosion processor is set in the pipeline monitoring center and is communicatively connected to the temperature processor and the input screen. It is used to calculate the corrosion degree index through the external environmental temperature, external environmental humidity, anti - corrosion coating thickness, soil resistivity around the pipeline, potential difference between the outer wall of the pipeline and the anti - corrosion coating, preset potential difference threshold, temperature adjustment coefficient, external environmental humidity adjustment coefficient, soil resistivity adjustment coefficient around the pipeline, and potential adjustment coefficient after receiving the external environmental humidity, anti - corrosion coating thickness, soil resistivity around the pipeline, and potential difference between the outer wall of the pipeline and the anti - corrosion coating. It is used to activate the alarm when the corrosion degree index exceeds the preset corrosion degree index. The alarm is set in the pipeline monitoring center and is electrically connected to the corrosion processor for emitting audible and visual alarms.

[0022] Furthermore, the calculation formula for the corrosion degree index is:

[0023]

[0024] Among them, R is the corrosion degree index, H is the humidity of the external environment, with the unit of RH, m is the thickness of the anti-corrosion coating, with the unit of mm, representing the anti-corrosion effect of the anti-corrosion coating, G is the soil resistivity around the pipeline, with the unit of Ω·m, U is the potential difference between the outer wall of the pipeline and the anti-corrosion coating, with the unit of V, and U 0 is the preset potential difference threshold, with the unit of V. α, β, γ, and δ are the temperature adjustment coefficient, the external environment humidity adjustment coefficient, the soil resistivity adjustment coefficient around the pipeline, and the potential adjustment coefficient respectively. The value of α is 0.5, the value of β is 0.8, the value of γ is 0.6, and the value of δ is 1.8.

[0025] For example, the external environment temperature is 40°C, the external environment humidity is 30%RH, that is, 0.3RH, the thickness of the anti-corrosion coating is 0.8mm, the soil resistivity around the pipeline is 200Ω·m, the potential difference between the outer wall of the pipeline and the anti-corrosion coating is 0.4V, the preset potential difference threshold is 0.3V, α is 0.5, β is 0.8, γ is 0.6, and δ is 1.8. The calculated corrosion degree index is approximately 0.57.

[0026] Furthermore, the corrosion processor is used to generate information indicating that the anti-corrosion coating of the pipeline is severely corroded when the corrosion degree index exceeds the preset corrosion degree index, and send it to the mobile phone App. The mobile phone App is communicatively connected to the corrosion processor and is used to display the information indicating that the anti-corrosion coating of the pipeline is severely corroded after receiving the information, and dispatch maintenance personnel to repaint the anti-corrosion coating or replace the anti-corrosion coating.

[0027] The mobile phone App immediately receives the information indicating that the anti-corrosion coating of the pipeline is severely corroded and displays the severe information of the anti-corrosion coating of the pipeline, enabling maintenance personnel to quickly understand that the problem of damage to the anti-corrosion coating of the pipeline is serious. For example, repainting the anti-corrosion coating or replacing the anti-corrosion coating enables maintenance personnel to locate the problem more quickly and accurately, reducing unnecessary inspection and maintenance times.

[0028] The beneficial effects of the present invention:

[0029] 1. Through the setting of the thermal insulation layer, the present invention can effectively reduce heat dissipation, maintain the temperature stability inside the pipeline, and significantly improve the energy utilization efficiency and reduce energy consumption when transporting high-temperature or low-temperature fluids. The anti-corrosion coating is applied to the outer peripheral wall of the pipeline to form a barrier layer, effectively resisting the erosion of moisture, oxygen, chemical substances, etc. in the external environment on the pipeline, extending the service life of the pipeline, and reducing the leakage and maintenance costs caused by corrosion. Through the setting of the thermal insulation failure monitoring module, the thermal insulation performance of the thermal insulation layer is monitored in real time. When it is detected that the thermal insulation effect fails, maintenance personnel are timely dispatched to repair the pipeline with the failed thermal insulation layer, avoiding the aggravation of heat loss and ensuring the normal pipeline transportation function. The descaling module reduces the difficulty of manual pipeline cleaning, effectively removes the scale on the inner wall of the pipeline, keeps the pipeline smooth, improves the fluid transmission efficiency, and reduces pipeline blockage. The corrosion alarm module monitors the corrosion condition of the anti-corrosion coating, timely discovers the damage of the coating, emits an alarm signal, reminds the management personnel to take preventive measures or carry out repairs, and prevents the further development of corrosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the concept and technical effects generated by the present invention in combination with the embodiments to fully understand the purpose, features and effects of the present invention.

[0032] As Figure 1 , the technical solution adopted by the present invention to solve its technical problems is: a pipeline anti-corrosion and thermal insulation system, including a thermal insulation layer, an anti-corrosion coating, a thermal insulation failure monitoring module, a descaling module, and a corrosion alarm module. The thermal insulation layer is arranged on the inner wall of the pipeline and fixedly connected to the inner wall of the pipeline. The anti-corrosion coating is applied to the outer peripheral wall of the pipeline. The thermal insulation failure monitoring module is used to monitor whether the thermal insulation of the pipeline thermal insulation layer fails. It is used to dispatch maintenance personnel to repair the pipeline with the failed thermal insulation layer. The descaling module is used to descale the inside of the pipeline. The corrosion alarm module is used to monitor the corrosion condition of the anti-corrosion coating. It is used to emit an alarm.

[0033] Through the setting of the thermal insulation layer, heat loss can be effectively reduced, the temperature inside the pipeline can be maintained stable, and the energy utilization efficiency can be significantly improved and energy consumption can be reduced when transporting high-temperature or low-temperature fluids. The anti-corrosion coating is applied to the outer peripheral wall of the pipeline to form a barrier layer, effectively resisting the erosion of moisture, oxygen, chemical substances, etc. in the external environment to the pipeline, extending the service life of the pipeline, and reducing the leakage and maintenance costs caused by corrosion. Through the setting of the thermal insulation failure monitoring module, the thermal insulation performance of the thermal insulation layer is monitored in real time. When the detection of the thermal insulation effect fails, the maintenance personnel are timely dispatched for repair to avoid the aggravation of heat loss and ensure the normal pipeline transportation function. The descaling module reduces the difficulty of manually cleaning the inside of the pipeline, effectively removes the scale on the inner wall of the pipeline, keeps the pipeline smooth, improves the fluid transmission efficiency, and reduces pipeline blockage. The corrosion alarm module monitors the corrosion condition of the anti-corrosion coating, timely discovers the damage condition of the coating, emits an alarm signal, reminds the management personnel to take preventive measures or carry out repairs, and prevents the further development of corrosion.

[0034] The thermal insulation failure monitoring module includes a temperature processor, a first temperature sensor, a second temperature sensor, an input screen, and a mobile phone App. The input screen is set in the pipeline monitoring center and is used for the management personnel to input the density of the thermal insulation layer material, the total covered area of the thermal insulation layer, and the thermal conductivity of the thermal insulation layer material measured in advance, and then send the density of the thermal insulation layer material, the total covered area of the thermal insulation layer, and the thermal conductivity of the thermal insulation layer material to the temperature processor. The first temperature sensor is set on the outer wall of the pipeline and is used for measuring the external environment temperature and sending the external environment temperature to the temperature processor. The second temperature sensor is set on the pipeline thermal insulation layer and is used for measuring the internal temperature of the pipeline and sending the internal temperature of the pipeline to the temperature processor. The temperature processor is set in the pipeline monitoring center and is communicatively connected with the input screen and the second temperature sensor. It is used for calculating the thermal insulation efficiency through the density of the thermal insulation layer material, the total covered area of the thermal insulation layer, the external environment temperature, the internal temperature of the pipeline, and the thermal conductivity of the thermal insulation layer material after receiving the density of the thermal insulation layer material, the total covered area of the thermal insulation layer, the external environment temperature, the internal temperature of the pipeline, and the thermal conductivity of the thermal insulation layer material. It is used for generating pipeline thermal insulation layer failure information and sending it to the mobile phone App when the thermal insulation efficiency is lower than the preset thermal insulation efficiency. The mobile phone App is set on the maintenance personnel's mobile terminal and is communicatively connected with the temperature processor. It is used for displaying the pipeline thermal insulation layer failure information and dispatching the maintenance personnel for repair after receiving the pipeline thermal insulation layer failure information.

[0035] The calculation formula for the thermal insulation efficiency is:

[0036]

[0037] Among them, P is the thermal insulation efficiency, ρ is the density of the thermal insulation layer material, and the unit is kg / m 3 , S is the total covered area of the thermal insulation layer, and the unit is m 2 , T1 is the external ambient temperature, in °C, T 2 is the internal temperature of the pipeline, in °C, and J is the thermal conductivity of the insulation material, in W / m·K.

[0038] For example, the insulation material is rigid polyurethane with a density of 40 kg / m 3 , and the total area covered by the insulation layer measured in advance is 10 m 2 , the external ambient temperature is -5 °C, the internal temperature of the pipeline is 60 °C, and the thermal conductivity is 0.03 W / m·K. At this time, the calculated insulation efficiency is approximately 0.86.

[0039] The anti-corrosion coating is an alloy anti-corrosion coating.

[0040] Alloy coatings usually have high hardness and wear resistance, which enables the coating to better resist mechanical wear and scratches and extend the service life of the coating.

[0041] The descaling module includes an ultrasonic transmitter, an ultrasonic receiver, an electronic timer, a scale processor, and several ultrasonic vibrators. The input screen is used for the management staff to input the pre-measured pipeline length and then send the pipeline length to the scale processor. The temperature processor is used to send the total area covered by the thermal insulation layer to the scale processor after receiving it. The ultrasonic transmitter is arranged on the outer wall of the pipeline, and its emission direction points to the inside of the pipeline, and is used to intermittently emit ultrasonic waves into the pipeline. When emitting ultrasonic waves, it sends a first transmission signal to the electronic timer. The ultrasonic receiver is arranged at the center of the pipeline interior, fixedly connected to the pipeline through a support frame, and its receiving direction corresponds to the emission direction of the ultrasonic transmitter. When receiving ultrasonic waves, it sends a second transmission signal to the electronic timer. The electronic timer is arranged on the ultrasonic transmitter, communicatively connected to the ultrasonic transmitter and the ultrasonic receiver, and is used to record the time difference between the emission and reception of the ultrasonic wave after receiving the first transmission signal and the second transmission signal, and then obtain the time for the ultrasonic wave to pass through the pipeline, the thermal insulation layer, and the scale, and send the time for the ultrasonic wave to pass through the pipeline, the thermal insulation layer, and the scale to the scale processor. The scale processor is arranged in the pipeline monitoring center, communicatively connected to the temperature processor, the electronic timer, and the input screen, and is used to calculate the scaling influence index through the preset propagation speed of the ultrasonic wave in the thermal insulation layer, the time for the ultrasonic wave to pass through the pipeline, the thermal insulation layer, and the scale, the pipeline length, and the total area covered by the thermal insulation layer after receiving the time for the ultrasonic wave to pass through the pipeline, the thermal insulation layer, and the scale, the pipeline length, and the total area covered by the thermal insulation layer. When the scaling influence index is greater than the preset scaling influence index, it starts several ultrasonic vibrators for a period of time. The several ultrasonic vibrators are evenly spaced on the outer wall of the pipeline and are used to generate ultrasonic waves. The ultrasonic waves penetrate the pipeline wall and the thermal insulation layer and enter the pipeline interior. The high-frequency vibration of the ultrasonic waves crushes and removes the scale layer and removes the dirt on the inner wall of the pipeline.

[0042] The oscillator inside the ultrasonic transmitter oscillates and emits ultrasonic waves under the action of a pulsed electrical signal. The ultrasonic waves propagate linearly in the pipeline internal medium thermal insulation layer and are reflected when encountering obstacles such as the scaling layer. The reflected ultrasonic waves are received by the ultrasonic transmitter and converted into electrical signals for processing. At this time, the electronic timer stops timing, and the time for the ultrasonic wave to pass through the pipeline, the thermal insulation layer, and the scale is obtained through the time difference between the emission and reception of the ultrasonic wave. The several ultrasonic vibrators use their generated high-frequency vibration to effectively crush and remove the scale on the inner wall of the pipeline.

[0043] The calculation formula for the scaling influence index is:

[0044]

[0045] Wherein, K is the scaling influence index, c is the preset propagation speed of ultrasonic waves in the thermal insulation layer, with the unit of m / s, Δt is the time for ultrasonic waves to pass through the pipeline, the thermal insulation layer, and the water scale, with the unit of s, and L is the pipeline length, with the unit of m.

[0046] For example, in a cylindrical pipeline with a length of 10 m and a diameter of 0.3 m, the thermal insulation layer evenly wraps the pipeline. The total covered area of the thermal insulation layer is the lateral area of the pipeline, approximately 10 m 2 . If the thermal insulation layer material is rigid polyurethane, the preset propagation speed of ultrasonic waves in the thermal insulation layer is 2000 m / s, and the time for ultrasonic waves to pass through the pipeline, the thermal insulation layer, and the water scale is 10 μs, that is, 0.00001 s. The calculated scaling influence index is approximately 0.06.

[0047] There are bolt connections between several ultrasonic vibrators and the outer wall of the pipeline.

[0048] Bolt connections have excellent anti-vibration performance, can effectively resist the impact of natural forces such as earthquakes on the pipeline, ensure the stability of the ultrasonic vibrator on the pipeline in harsh environments, and are not easily detached.

[0049] The corrosion alarm module includes a corrosion processor, a humidity sensor, and an alarm. The input screen is used for the management personnel to input the pre-measured anti-corrosion coating thickness, the soil resistivity around the pipeline, and the potential difference between the outer wall of the pipeline and the anti-corrosion coating, and then send the anti-corrosion coating thickness, the soil resistivity around the pipeline, and the potential difference between the outer wall of the pipeline and the anti-corrosion coating to the corrosion processor. The temperature processor is used to send the external environmental temperature to the corrosion processor after receiving the external environmental temperature. The humidity sensor is set on the soil surface to measure the external environmental humidity and send it to the corrosion processor. The corrosion processor is set in the pipeline monitoring center and is communicatively connected to the temperature processor and the input screen. It is used to calculate the corrosion degree index through the external environmental temperature, the external environmental humidity, the anti-corrosion coating thickness, the soil resistivity around the pipeline, the potential difference between the outer wall of the pipeline and the anti-corrosion coating, the preset potential difference threshold, the temperature adjustment coefficient, the external environmental humidity adjustment coefficient, the soil resistivity adjustment coefficient around the pipeline, and the potential adjustment coefficient. It is used to start the alarm when the corrosion degree index exceeds the preset corrosion degree index. The alarm is set in the pipeline monitoring center and is electrically connected to the corrosion processor for emitting an audible and visual alarm.

[0050] The calculation formula for the corrosion degree index is:

[0051]

[0052] Among them, R is the corrosion degree index, H is the humidity of the external environment, with the unit of RH, m is the thickness of the anti-corrosion coating, with the unit of mm, representing the anti-corrosion effect of the anti-corrosion coating, G is the soil resistivity around the pipeline, with the unit of Ω·m, U is the potential difference between the outer wall of the pipeline and the anti-corrosion coating, with the unit of V, and U 0 is the preset potential difference threshold, with the unit of V. α, β, γ, and δ are the temperature adjustment coefficient, the external environment humidity adjustment coefficient, the soil resistivity adjustment coefficient around the pipeline, and the potential adjustment coefficient respectively. The value of α is 0.5, the value of β is 0.8, the value of γ is 0.6, and the value of δ is 1.8.

[0053] For example, the external environment temperature is 40°C, the external environment humidity is 30%RH, that is, 0.3RH, the thickness of the anti-corrosion coating is 0.8mm, the soil resistivity around the pipeline is 200Ω·m, the potential difference between the outer wall of the pipeline and the anti-corrosion coating is 0.4V, the preset potential difference threshold is 0.3V, α is 0.5, β is 0.8, γ is 0.6, and δ is 1.8. The calculated corrosion degree index is approximately 0.57.

[0054] The corrosion processor is used to generate information on the serious corrosion degree of the pipeline anti-corrosion coating and send it to the mobile phone App when the corrosion degree index exceeds the preset corrosion degree index. The mobile phone App is communicatively connected to the corrosion processor and is used to display the information on the serious corrosion degree of the pipeline anti-corrosion coating after receiving the information on the serious corrosion degree of the pipeline anti-corrosion coating, and dispatch maintenance personnel to repaint the anti-corrosion coating or replace the anti-corrosion coating.

[0055] The mobile phone App immediately receives the information on the serious corrosion degree of the pipeline anti-corrosion coating and displays the serious corrosion information of the pipeline anti-corrosion coating, enabling maintenance personnel to quickly understand that the problem of damage to the pipeline anti-corrosion coating is serious. For example, repainting the anti-corrosion coating or replacing the anti-corrosion coating enables maintenance personnel to locate the problem more quickly and accurately, reducing unnecessary inspection and maintenance times.

[0056] The above embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present invention.

Claims

1. A pipeline anti-corrosion and thermal insulation system, characterized in that: Including insulation layer, anti-corrosion coating, insulation failure monitoring module, descaling module, corrosion alarm module; The thermal insulation layer is arranged on the inner wall of the pipeline and is fixedly connected to the inner wall of the pipeline; The anti-corrosion coating is coated on the outer peripheral wall of the pipeline; The insulation failure monitoring module is used to monitor whether the insulation of the pipeline insulation layer has failed; and to dispatch maintenance personnel to repair the pipeline with failed insulation layer; The descaling module is used to descaling the inside of the pipeline; The corrosion alarm module is used to monitor the corrosion condition of the anti-corrosion coating and to issue an alarm.

2. A pipeline anticorrosion and thermal insulation system according to claim 1, characterized in that : The insulation failure monitoring module includes a temperature processor, a first temperature sensor, a second temperature sensor, an input screen, and a mobile phone App; The input screen is arranged in the pipeline monitoring center, and is used for the management personnel to input the density of the insulation layer material, the total area covered by the insulation layer, and the thermal conductivity of the insulation layer material measured in advance, and then send the density of the insulation layer material, the total area covered by the insulation layer, and the thermal conductivity of the insulation layer material to the temperature processor; The first temperature sensor is arranged on the outer wall of the pipeline, and is used to measure the external environment temperature and send the external environment temperature to the temperature processor; The second temperature sensor is arranged on the pipe insulation layer, and is used to measure the internal temperature of the pipe, and send the internal temperature of the pipe to the temperature processor; The temperature processor is arranged in the pipeline monitoring center, and is in communication connection with the input screen and the second temperature sensor, and is used to calculate the insulation efficiency by the density of the insulation layer material, the total area covered by the insulation layer, the external environment temperature, the internal temperature of the pipeline, and the thermal conductivity of the insulation layer material after receiving the density of the insulation layer material, the total area covered by the insulation layer, the external environment temperature, the internal temperature of the pipeline, and the thermal conductivity of the insulation layer material; and is used to generate pipeline insulation layer failure information when the insulation efficiency is lower than the preset insulation efficiency, and send it to the mobile phone App; The mobile phone App is set on the mobile terminal of the maintenance personnel and is connected to the temperature processor for displaying the failure information of the pipeline insulation layer after receiving the failure information of the pipeline insulation layer and dispatching the maintenance personnel to perform maintenance.

3. A pipeline anticorrosion and thermal insulation system according to claim 2, characterized in that The calculation formula of thermal insulation efficiency is: Where P is the insulation efficiency, ρ is the density of the insulation layer material, the unit is kg / m 3 , S is the total area covered by the insulation layer, in m 2 , T1 is the external environment temperature, the unit is ℃, T2 is the internal temperature of the pipeline, the unit is ℃, J is the thermal conductivity of the insulation material, the unit is W / m·K.

4. A pipeline anticorrosion and thermal insulation system according to claim 2, characterized in that :The anti-corrosion coating is an alloy anti-corrosion coating.

5. A pipeline anticorrosion and thermal insulation system according to claim 2, characterized in that : The descaling module includes an ultrasonic transmitter, an ultrasonic receiver, an electronic timer, a scale processor, and a plurality of ultrasonic vibration rods; The input screen is used for the management personnel to input the pipeline length measured in advance, and then send the pipeline length to the fouling processor; The temperature processor is used to send the total area covered by the insulation layer to the fouling processor after receiving the total area covered by the insulation layer; The ultrasonic transmitter is arranged on the outer wall of the pipeline, and its transmission direction is directed to the inside of the pipeline, and is used to intermittently transmit ultrasonic waves to the inside of the pipeline; and is used to send a first transmission signal to the electronic timer when transmitting ultrasonic waves; The ultrasonic receiver is arranged at the center of the pipeline, fixedly connected to the pipeline through a support frame, and its receiving direction corresponds to the transmitting direction of the ultrasonic transmitter; and is used to send a second transmission signal to the electronic timer when receiving the ultrasonic wave; The electronic timer is arranged on the ultrasonic transmitter, and is in communication connection with the ultrasonic transmitter and the ultrasonic receiver, and is used to record the time difference from the transmission to the reception of the ultrasonic wave after receiving the first transmission signal and the second transmission signal, and then obtain the time when the ultrasonic wave passes through the pipeline, the thermal insulation layer, and the scale, and send the time when the ultrasonic wave passes through the pipeline, the thermal insulation layer, and the scale to the scale processor; The scaling processor is arranged in the pipeline monitoring center, and is in communication connection with the temperature processor, the electronic timer, and the input screen, and is used to calculate the scaling influence index by preset ultrasonic propagation speed in the thermal insulation layer, ultrasonic wave passing through the pipeline, the thermal insulation layer, the scaling time, the pipeline length, and the total coverage area of ​​the thermal insulation layer after receiving the time when the ultrasonic wave passes through the pipeline, the thermal insulation layer, the scaling time, the pipeline length, and the total coverage area of ​​the thermal insulation layer; and is used to start a plurality of ultrasonic vibration rods for a period of time when the scaling influence index is greater than the preset scaling influence index; Several ultrasonic vibration rods are evenly spaced and arranged on the outer wall of the pipeline to generate ultrasonic waves. The ultrasonic waves penetrate the pipeline wall and the insulation layer and enter the interior of the pipeline. The high-frequency vibration of the ultrasonic waves crushes and removes the scale layer and removes the dirt on the inner wall of the pipeline.

6. A pipeline anticorrosion and thermal insulation system according to claim 5, characterized in that The calculation formula of scaling influence index is: Among them, K is the scaling influence index, c is the preset ultrasonic propagation speed in the insulation layer, the unit is m / s, Δt is the time it takes for the ultrasonic wave to pass through the pipeline, insulation layer, and scale, the unit is s, and L is the pipeline length, the unit is m.

7. A pipeline anticorrosion and thermal insulation system according to claim 5, characterized in that : Several of the ultrasonic vibration rods are connected to the outer wall of the pipeline by bolts.

8. The pipeline anticorrosion and thermal insulation system according to claim 5, characterized in that :The corrosion alarm module includes a corrosion processor, a humidity sensor, and an alarm; The input screen is used for the management personnel to input the anti-corrosion coating thickness, soil resistivity around the pipeline, and the potential difference between the pipeline outer wall and the anti-corrosion coating measured in advance, and then send the anti-corrosion coating thickness, soil resistivity around the pipeline, and the potential difference between the pipeline outer wall and the anti-corrosion coating to the corrosion processor; The temperature processor is used to send the external environment temperature to the corrosion processor after receiving the external environment temperature; The humidity sensor is arranged on the soil surface to measure the humidity of the external environment and send it to the corrosion processor; The corrosion processor is arranged in the pipeline monitoring center, and is in communication connection with the temperature processor and the input screen, and is used for calculating the corrosion degree index through the external environment temperature, the external environment humidity, the anti-corrosion coating thickness, the soil resistivity around the pipeline, the potential difference between the outer wall of the pipeline and the anti-corrosion coating, the preset potential difference threshold, the temperature adjustment coefficient, the external environment humidity adjustment coefficient, the soil resistivity adjustment coefficient around the pipeline, and the potential adjustment coefficient after receiving the external environment humidity, the anti-corrosion coating thickness, the soil resistivity around the pipeline, the potential difference between the outer wall of the pipeline and the anti-corrosion coating; Used to activate the alarm when the corrosion degree index exceeds a preset corrosion degree index; The alarm is arranged in the pipeline monitoring center, electrically connected to the corrosion processor, and is used to issue an audible and visual alarm.

9. A pipeline anticorrosion and thermal insulation system according to claim 8, characterized in that The calculation formula of corrosion degree index is: Among them, R is the corrosion degree index, H is the external environment humidity, the unit is RH, m is the anti-corrosion coating thickness, the unit is mm, which indicates the corrosion protection effect of the anti-corrosion coating, G is the soil resistivity around the pipeline, the unit is Ω·m, U is the potential difference between the outer wall of the pipeline and the anti-corrosion coating, the unit is V, U0 is the preset potential difference threshold, the unit is V, α, β, γ, δ are the temperature adjustment coefficient, the external environment humidity adjustment coefficient, the soil resistivity adjustment coefficient around the pipeline, and the potential adjustment coefficient, respectively. The value of α is 0.5, the value of β is 0.8, the value of γ is 0.6, and the value of δ is 1.

8.

10. A pipeline anticorrosion and thermal insulation system according to claim 8, characterized in that : The corrosion processor is used to generate information on the severity of corrosion of the pipeline anti-corrosion coating when the corrosion index exceeds the preset corrosion index, and send it to the mobile phone App; The mobile phone App is in communication with the corrosion processor and is used to display the information on the severity of the corrosion of the pipeline anti-corrosion coating after receiving the information on the severity of the corrosion of the pipeline anti-corrosion coating, and dispatch maintenance personnel to repaint the anti-corrosion paint or replace the anti-corrosion coating.

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