An instrument sampling line heat tracing internet of things system

Abstract

This utility model discloses a novel IoT system for heat tracing of instrument sampling pipelines, belonging to the field of heat tracing technology for instrument sampling pipelines. It includes a communication section and multiple sets of heat tracing and monitoring components installed on the instrument sampling pipeline. In cold weather, the power supply is activated, energizing the electric heat tracing cable and the temperature controller. Simultaneously, the switching power supply powers the AC voltage and current transmitters and data transmission unit, enabling them to operate. Personnel can manually set the target temperature on-site via the temperature controller or remotely via computer or mobile device. The advantages of this utility model are: it fully utilizes wireless communication and IoT technologies, combined with electrical control and heat tracing technologies, to achieve remote operation and monitoring of the electric heat tracing cable and quantitative analysis of the system's operating data. This comprehensively solves the passive situation of intermittent on-site inspections by personnel, realizing full-process management of the electric heat tracing system.

Description

Technical Field

[0001] This utility model relates to the fields of pipeline heat tracing and Internet of Things (IoT) technology, specifically a pipeline heat tracing IoT system for instrument sampling. Background Technology

[0002] During winter operation of thermal power plants in northern regions, ambient temperatures may drop below 0°C, especially in winter. Due to the low outside temperatures, various measuring instruments and the media such as steam and water in instrument sampling pipelines can freeze and become blocked, leading to inaccurate instrument measurements, equipment malfunctions, and disruptions to production. To ensure the normal operation of instrument sampling pipelines in low temperatures, electric heat tracing and insulation systems are widely used as an effective solution for heat preservation and freeze protection. An electric heat tracing and insulation system typically consists of an electric heat tracing cable, a temperature controller, temperature measuring points, and insulation. Its working principle involves dissipating heat through the heat tracing medium, replenishing the heat loss in the instrument sampling pipeline through direct or indirect heat exchange, thereby achieving the normal operating requirements of heating, insulation, or freeze protection.

[0003] In existing technologies, to prevent freezing and blockage of instrument sampling pipelines, the heating cable is typically kept continuously on. The temperature is manually set using a thermostat based on experience, and staff intermittently inspect the cable's operation. However, this method of intermittent on-site inspection by staff presents several unresolved problems:

[0004] First, during a sudden drop in temperature, staff are unable to adjust the temperature setting on the thermostat in time.

[0005] Second, staff cannot promptly detect tripping of the heat tracing circuit or damage to the electric heat tracing cable, and consequently cannot restore the heat tracing of the instrument sampling pipeline in a timely manner.

[0006] Third, staff cannot perform quantitative analysis of the operating data of the electric heat tracing system. Utility Model Content

[0007] This utility model provides an IoT system for heat tracing in instrument sampling pipelines, aiming to solve the problems of existing technologies, such as the inability of staff to adjust the temperature setting of the electric heat tracing and insulation system thermostat in a timely manner, the inability to detect faults in the electric heat tracing and insulation system in a timely manner, and the inability to perform quantitative analysis of the operating data of the electric heat tracing system.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is: an instrument sampling pipeline heat tracing Internet of Things system, which includes multiple heat tracing subsystems installed at temperature measuring points and a communication part; the heat tracing subsystem includes a heat tracing part and a monitoring part installed on the instrument sampling pipeline.

[0009] The heat tracing component includes a power supply, an instrument sampling pipeline, an electric heat tracing tape, and an insulation layer; the power supply is electrically connected to each electric heat tracing tape to supply power to the electric heat tracing tape, the outer surface of the instrument sampling pipeline is covered with an independent electric heat tracing tape, and the instrument sampling pipeline is wrapped with an insulation layer.

[0010] The monitoring section includes a switching power supply, current transformers, contactors, temperature controllers, resistance temperature detectors (RTDs), and AC voltage and current transmitters. The contactors are connected in series between the power supply and the heating tape, the temperature controller is connected to the contactors, and the RTD leads are connected to the temperature controller. The power lines of the heating tape pass through the current transformers, and multiple current transformers are connected to the AC voltage and current transmitters. The power supply powers the AC voltage and current transmitters via the switching power supply, and the power supply is also connected to the temperature controller to power it.

[0011] The communication component includes multiple data transmission units, a data cloud, a computer terminal, and a mobile terminal. The data transmission units are connected to the heat tracing subsystem. The data cloud is wirelessly connected to the data transmission units, the computer terminal, and the mobile terminal. The power supply provides power to the data transmission units via a switching power supply. The data transmission units transmit monitoring parameters and setting parameters to the data cloud via remote bidirectional communication. The data cloud transmits monitoring parameters and setting parameters to the computer terminal or the mobile terminal via remote bidirectional communication.

[0012] Furthermore, the operating power supply is 220V AC;

[0013] Furthermore, the electric tracing cable is wound and laid on the instrument sampling pipeline.

[0014] Furthermore, the electric heating cable is an armored MI heating cable.

[0015] Furthermore, the thermal resistor is located within the insulation layer and does not come into contact with the instrument sampling pipeline or the electric heating cable.

[0016] Furthermore, each heat tracing subsystem is connected to the data transmission unit, and the data transmission unit is connected to the temperature controller and AC voltage and current transmitter within the heat tracing subsystem via a 485 communication line to transmit information.

[0017] Furthermore, the computer terminal and mobile terminal may be provided with one or more as needed.

[0018] Compared with existing technologies, this invention offers the following advantages: 1. The instrument sampling pipeline is wrapped with a separate electric heating cable and its insulation layer, which enhances physical insulation and reduces heat loss. 2. The electric heating cable is an armored MI heating cable, which is high-temperature resistant, high-strength, highly corrosion-resistant, fireproof, explosion-proof, and has an extremely long service life. It is suitable for long-distance, high-power heating. 3. The thermal resistor is located in the middle of the insulation layer and does not come into contact with the instrument sampling pipeline or the electric heating cable; this avoids damage to the thermal resistor, which can measure a more uniform ambient temperature. 4. Each heat tracing subsystem is connected to a data transmission unit, enabling parameter monitoring and setting on a computer or mobile device. This allows for timely detection of problems with the electric heating cable on-site, remote monitoring of the actual temperature of each heat tracing system on-site via computer and mobile devices, access to historical data, and setting of the temperature controller based on the actual temperature and on-site environment. This ensures the safety of the measuring points and reduces the workload of on-site personnel.

[0019] Compared with the prior art, the advantages of this utility model are as follows: This instrument sampling pipeline heat tracing IoT system makes full use of wireless communication, IoT and other technologies to realize remote operation and monitoring of electric heat tracing tape, as well as quantitative analysis of electric heat tracing system operation data. It comprehensively solves the passive situation of intermittent on-site inspection by personnel and realizes the whole process management of electric heat tracing system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall system structure of this utility model.

[0021] In the diagram: 1. Power supply; 2. Instrument sampling pipeline; 3. Electric heating tape; 4. Insulation layer; 5. Switching power supply; 6. Current transformer; 7. Temperature controller; 8. Resistance temperature detector; 9. Contactor; 10. AC voltage and current transmitter; 11. Data transmission unit; 12. Data cloud; 13. Computer terminal; 14. Mobile terminal. Detailed Implementation

[0022] The present invention will now be described clearly and completely with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without inventive effort are within the scope of protection of this disclosure.

[0023] like Figure 1 As shown, an IoT system for heat tracing of instrument sampling pipelines includes a communication section, a heat tracing section installed on the instrument sampling pipeline 2, and a monitoring section.

[0024] The heat tracing component includes a power supply 1, several instrument sampling lines 2, an electric heat tracing cable 3, and an insulation layer 4. The power supply 1 is connected to the electric heat tracing cable 3 to supply power to the electric heat tracing cable 3. Each instrument sampling line 2 has an independent electric heat tracing cable 3 laid on its outer surface, and the instrument sampling line 2 is wrapped with an insulation layer 4.

[0025] The monitoring section includes a switching power supply 5, current transformers 6, contactors 9, temperature controllers 7, resistance temperature detectors (RTDs) 8, and AC voltage and current transmitters 10. The contactor 9 is connected in series between the power supply 1 and the heating tape 3. The temperature controller 7 is connected to the contactor 9, and the RTD 8 is connected to the temperature controller 7. The power cord of the heating tape 3 passes through the current transformers 6. Multiple current transformers 6 within the heating subsystem are connected to the AC voltage and current transmitters 10. The power supply 1 powers the AC voltage and current transmitters 10 via the switching power supply 5, and also powers the temperature controller 7. The communication section includes multiple data transmission units 11, a data cloud 12, a computer terminal 13, and a mobile terminal 14. The data transmission units 11 are connected to the heating subsystem. The data cloud 12 is wirelessly connected to the data transmission units 11, the computer terminal 13, and the mobile terminal 14. The power supply 1 powers the data transmission units 11 via the switching power supply 5.

[0026] In this embodiment, the power supply 1 of the instrument sampling pipeline 2 heat tracing IoT system is connected to the electric heating tape 3 and the temperature controller 7, providing 220V AC power to the electric heating tape 3 and the temperature controller 7 to ensure normal operation of the electric heating tape 3 and the temperature controller 7. Based on the production site, multiple instrument sampling pipelines 2 require heat tracing within the area. Multiple electric heating tapes 3 form a heat tracing subsystem, with one power supply 1 for each subsystem. The power supply 1 is also connected to a switching power supply 5 to power the AC voltage and current transmitter 10. Within a heat tracing subsystem, an independent electric heating tape 3 is wrapped around the outer surface of each instrument sampling pipeline 2 as needed to ensure a uniform operating temperature and prevent heat tracing blind spots. To enhance the heat tracing effect, armored MI heating cables are selected as the electric heating tape 3. An insulation layer 4 is wrapped around the instrument sampling pipeline 2 to prevent the heat generated by the electric heating tape 3 from being transferred to the air, thus avoiding heat waste and providing a suitable working environment for the instrument sampling pipeline 2 in cold environments. Thermostat 7 and contactor 9 are connected to the heat tracing circuit, working with RTD 8 to monitor and control the temperature of the heat tracing circuit. RTD 8 is placed in the middle of the insulation layer 4, avoiding contact with the instrument sampling line 2 and the electric heat tracing cable 3 to prevent damage, while still providing feedback on the ambient temperature within the insulation layer 4. In cold environments, the target temperature of the heat tracing branch is set by thermostat 7. When the temperature reported by RTD 8 is lower than the set temperature by thermostat 7, thermostat 7 controls contactor 9 to heat the electric heat tracing cable 3; when the temperature reported by RTD 8 reaches the set temperature value by thermostat 7, thermostat 7 controls contactor 9 to stop heating the electric heat tracing cable 3. A current transformer 6 is installed on the power line of each electric heat tracing cable 3 for real-time monitoring of its operating status. Multiple current transformers 6 running through the power lines of the electric heat tracing cable 3 are connected to AC voltage and current transmitter 10.

[0027] In this embodiment, each heat tracing subsystem is connected to a data transmission unit 11. The data transmission unit 11 is powered by a switching power supply 5. The data transmission unit 11 is connected to the temperature controller 7 and the AC voltage and current transmitter 10 in the heat tracing subsystem via a 485 communication line. The data transmission unit 11 transmits monitoring parameters and setting parameters to the data cloud 12 via remote two-way communication. At the same time, the data cloud 12 transmits monitoring parameters and setting parameters to the computer terminal 13 or mobile terminal 14 via remote two-way communication. The staff can monitor the information of the heat tracing IoT system of the instrument sampling pipeline 2 through the computer terminal 13 or mobile terminal 14, and can also set the target temperature in the heat tracing IoT system of the instrument sampling pipeline 2.

[0028] Working principle: In cold weather, power is supplied to the working power supply 1 of the heat tracing IoT system in the instrument sampling pipeline 2, which in turn powers the electric heating tape 3 and the temperature controller 7. Simultaneously, the switching power supply 5 powers the AC voltage and current transmitter 10 and the data transmission unit 11, enabling them to operate. Operators can manually set the target temperature on-site via the temperature controller 7, or remotely via a computer terminal 13 or a mobile terminal 14. Manual setting of the target temperature has priority over remote setting.

[0029] After the instrument sampling line 2 heat tracing IoT system is put into operation, the working power supply 1 continuously heats the electric heating tape 3. The temperature of the outer insulation layer 4 of the instrument sampling line 2 is fed back to the temperature controller 7 through the thermal resistor 8. When the temperature fed back by the thermal resistor 8 is lower than the set temperature of the temperature controller 7, the temperature controller 7 controls the contactor 9 to continue heating the electric heating tape 3 until the temperature fed back by the thermal resistor 8 reaches the set temperature value of the temperature controller 7, at which point the temperature controller 7 controls the contactor 9 to stop heating the electric heating tape 3.

[0030] After the instrument sampling pipeline 2 heat tracing IoT system is put into operation, the AC voltage and current transmitter 10 collects the current data of each branch of the electric heating tape 3 through the current transformers 6. The current data collected by the AC voltage and current transmitter 10 is transmitted to the data cloud 12 through the data transmission unit 11. Similarly, the temperature controller 7 transmits the feedback temperature of the insulation layer 4 to the data cloud 12 through the data transmission unit 11. Personnel can remotely monitor the working status of the electric heating tape 3 of the instrument sampling pipeline 2 in real time via a computer terminal 13 or a mobile terminal 14. This includes real-time monitoring of the working current of each electric heating tape 3 and the real-time temperature of the insulation layer 4 of the instrument sampling pipeline 2. The working status of each electric heating tape 3 can be viewed in real time on the computer terminal 13 or the mobile terminal 14, achieving unattended operation and full wireless monitoring. Personnel can also remotely access the historical temperature of the insulation layer 4 of each branch of the electric heating tape 3 via the computer terminal 13 or the mobile terminal 14, gaining a comprehensive understanding of the heat tracing system and providing important reference for equipment operation and maintenance.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and not to limit them. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this disclosure or equivalent substitutions can be made to some technical features, all of which should be covered within the scope of the technical solutions claimed in this disclosure.

Claims

1. An instrument sampling line heat tracing internet of things system, characterized by: It includes multiple heat tracing subsystems installed at temperature measuring points and a communication component; the heat tracing subsystem includes a heat tracing component and a monitoring component installed on the instrument sampling pipeline (2); The heat tracing component includes a power supply (1), an instrument sampling pipeline (2), an electric heat tracing cable (3), and an insulation layer (4). The power supply (1) is electrically connected to each electric heat tracing cable (3) to supply power to the electric heat tracing cable (3). An independent electric heat tracing cable (3) is laid on the outer surface of the instrument sampling pipeline (2), and the instrument sampling pipeline (2) is wrapped with an insulation layer (4). The monitoring section includes a switching power supply (5), current transformers (6), contactors (9), a temperature controller (7), a resistance temperature detector (8), and an AC voltage and current transmitter (10). The contactor (9) is connected in series between the working power supply (1) and the electric heating tape (3). The temperature controller (7) is connected to the contactor (9). The lead of the resistance temperature detector (8) is connected to the temperature controller (7). The power line of the electric heating tape (3) passes through the current transformers (6). Multiple current transformers (6) are connected to the AC voltage and current transmitter (10). The working power supply (1) supplies power to the AC voltage and current transmitter (10) through the switching power supply (5). The working power supply (1) is connected to the temperature controller (7) to supply power to the temperature controller (7). The communication section includes multiple data transmission units (11), a data cloud (12), a computer terminal (13), and a mobile terminal (14). The data transmission unit (11) is connected to the heat tracing subsystem. The data cloud (12) is wirelessly connected to the data transmission unit (11), the computer terminal (13), and the mobile terminal (14). The working power supply (1) supplies power to the data transmission unit (11) via the switching power supply (5). The data transmission unit (11) sends monitoring parameters and setting parameters to the data cloud (12) via remote two-way communication. The data cloud (12) sends monitoring parameters and setting parameters to the computer terminal (13) or the mobile terminal (14) via remote two-way communication.

2. The instrument sampling pipeline heat tracing IoT system according to claim 1, characterized in that: The working power supply (1) is 220V AC.

3. The instrument sampling pipeline heat tracing IoT system according to claim 1, characterized in that: The electric heating cable (3) is wrapped and laid on the instrument sampling pipeline (2).

4. A heat tracing IoT system for instrument sampling pipelines according to claim 1 or 3, characterized in that... The electric heating cable (3) is an armored MI heating cable.

5. The instrument sampling pipeline heat tracing IoT system according to claim 1, characterized in that: The thermal resistor (8) is located in the insulation layer (4) and does not come into contact with the instrument sampling pipeline (2) and the electric heating tape (3).

6. The instrument sampling pipeline heat tracing IoT system according to claim 1, characterized in that: Each heat tracing subsystem is connected to the data transmission unit (11), and the data transmission unit (11) is connected to the temperature controller (7) and AC voltage and current transmitter (10) in the heat tracing subsystem via a 485 communication line to transmit information.

7. The instrument sampling pipeline heat tracing IoT system according to claim 1, characterized in that: The computer terminal (13) and mobile terminal (14) may be provided with one or more as needed.

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