Electric heat tracing system with fault detection and alarm functions
By introducing temperature sensors and programmable logic control systems into the electric heat tracing system, fault detection and alarm functions are realized, which solves the problem of lack of fault detection in the existing system and improves the reliability and safety of production.
Patent Information
- Application Number
- CN202420874069.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-04-25
AI Technical Summary
The existing electrical heating system lacks fault detection and alarm functions, resulting in failure to detect system failure in time, affecting normal production operation.
An electric heating system including electric heating tape, temperature sensor and programmable logic control system is designed. Electric heating tape is composed of multiple layers of materials, including heating wire, heat dissipation layer, insulation layer, flame retardant layer and protective sheath. The temperature sensor is connected to the control system, and the temperature detection, display and alarm functions are realized through the control system.
It realizes the fault detection and alarm functions of the electric heating system, promptly reminds the operator of the fault situation, and avoids production shutdown caused by the fault. At the same time, through the design of multi-layer materials, the heat transfer speed and safety are improved, and the risk of fire is reduced.
Smart Images
Figure CN222381821U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an electric heating system, and relates to the technical fields of electric heating such as metallurgy, chemical industry, and medicine. Background Art
[0002] In winter, due to the low outside temperature, various measuring instruments and process equipment will freeze, solidify, precipitate crystals, etc., thus affecting the correct measurement and production operation of measuring instruments and process equipment. As an important protection system for metallurgical, chemical, pharmaceutical and other enterprises, the electric heating system plays an important role in the normal production and operation of the company.
[0003] The electric heating cable is a conductive coil made of high-temperature heat-resistant material with a certain degree of flexibility. According to different application requirements, the electric heating cable can be self-regulating or constant temperature. The self-regulating electric heating cable can automatically adjust the heating power according to the ambient temperature, while the constant temperature electric heating cable needs to be adjusted by an external controller. The electric heating cable is wound around the process equipment that needs heating to provide the equipment with heating function. At present, the electric heating system generally only performs a simple heating function. As for whether the heating system is operating normally, there is a lack of necessary detection tools. Often, the electric heating system fails and has seriously affected the normal operation of production before it can attract the attention of the staff on duty. Utility Model Content
[0004] The utility model aims to provide an electric heating system with fault detection and alarm functions, thereby solving the problems existing in the prior art.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0006] An electric heating system with fault detection and alarm functions includes an electric heating tape laid on the outer surface of a device to be heated, a temperature sensor fixed to the outer surface of the electric heating tape and used to detect the temperature of the electric heating tape, and a control system connected to the temperature sensor and used to display the temperature and issue an alarm.
[0007] Furthermore, the device to be heated may be any device that requires heating, such as a pipeline, a measuring instrument or a process equipment, and the winding method of the electric heating tape may adapt to the shape of the device to be heated. For example, when the device to be heated is a pipeline or a tank, the electric heating tape may be arranged in a circular shape at equal intervals or laid directly on the outer surface of the pipeline or tank along the direction of the fluid.
[0008] Furthermore, multiple groups of electric heating tape loops are laid on the outer surface of the device to be heated, the distance between adjacent electric heating tape loops is no greater than the distance between adjacent electric heating tapes inside each group of electric heating tape loops, and each group of electric heating tape loops works independently without affecting each other.
[0009] Furthermore, the cross-section of the electric heating tape is oblate, including at least two heating wires arranged in parallel and at intervals, a heat dissipation layer covering the heating wires, an insulating layer covering the heat dissipation layer, a flame retardant layer arranged on the outside of the insulating layer, and a protective cover wrapped on the outside of the flame retardant layer. The material of the insulating layer may be, for example, a mineral magnesium oxide material, the thickness of the insulating layer may be, for example, 0.4-2mm, preferably 0.5-1.6mm, the thickness of the flame retardant layer may be, for example, 4-10mm, preferably 5-8mm, and the material of the protective cover may be, for example, a ceramic silicone material.
[0010] Furthermore, an optical fiber line parallel to the heating wire is arranged in the center of the electric heating belt. The optical fiber line is connected to a temperature sensor after passing through the electric heating belt every 1-4 meters, for example, to accurately detect the temperature of the electric heating belt.
[0011] Furthermore, each temperature sensor is fixed on each independent electric heating cable loop.
[0012] Furthermore, each set of electric heating tape loops is connected to an electric heating system power line for power supply via an electric heating system junction box, and one end of the electric heating system power line away from the electric heating tape is connected to a main power supply.
[0013] Furthermore, the control system is a programmable logic control system, for example, a DCS control system.
[0014] Furthermore, the control system includes an information acquisition module, an analysis and control module, a display module and an alarm module. The input end of the information acquisition module is connected to the temperature sensor for collecting temperature signals detected by the temperature sensor, and the output end is connected to the analysis and control module. The analysis and control module is used to detect and analyze the input temperature signal. The analysis and control module is connected to the display module and the alarm module respectively. The analysis and control module obtains temperature data from the information acquisition module and compares it with a set temperature value (for example, the temperature required for the heating device to work), so as to judge the working status of the electric heating tape. The analysis and control module transmits the temperature data to the display module and the alarm module. When the temperature is lower than the set temperature, the electric heating tape is in a fault state and transmits the abnormal signal to the alarm module and the display module.
[0015] Furthermore, the analysis and control module includes multiple sub-modules, the number of sub-modules is the same as the number of temperature sensors, and one sub-module corresponds to one temperature sensor. The display module obtains and displays the temperature data of each sub-module, and the display module displays the temperature arrangement position corresponding to the temperature sensor.
[0016] Furthermore, the temperature sensor is connected to the control system via a signal line.
[0017] Beneficial effects of the utility model
[0018] The utility model discloses an electric heating system with fault detection and alarm functions. The cross section of the electric heating belt is oblate, which increases the contact area between the electric heating belt and the device to be heated and improves the heat transfer speed. The outside of the heating wire is provided with a heat dissipation layer, an insulating layer, a flame retardant layer and a protective sleeve in sequence. The heat dissipation layer helps to transfer heat. The insulating layer effectively prevents current leakage and ensures safety during use. The flame retardant layer can suppress the spread of flames when the heating wire is abnormally high in temperature and reduce the risk of fire. The protective sleeve plays a physical protective role to prevent external factors from damaging the heating wire. The optical fiber is connected to the control system via a temperature sensor. The control system includes an information acquisition module, an analysis control module, and a display Module and alarm module, the input end of the information acquisition module is connected to the temperature sensor, which is used to collect the temperature signal detected by the temperature sensor, and the output end is connected to the analysis and control module, which is used to detect and analyze the input temperature signal. The analysis and control module is respectively connected to the display module and the alarm module. When the electric heating belt operates normally, the electric heating belt generates heat, and the control system detects that the temperature is the temperature generated by the electric heating belt. When the electric heating belt fails, the temperature of the electric heating belt is lower than the set temperature. The analysis and control module transmits the abnormal signal to the alarm module and the display module to remind the operator to check and repair in time to avoid long-term failure of the electric heating belt and cause production shutdown. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 The utility model is a schematic diagram of an electric heating system with fault detection and alarm functions.
[0020] Figure 2 It is a schematic diagram of the cross section of the electric heating cable.
[0021] Figure 3 It is a connection diagram of the control system.
[0022] Reference numerals:
[0023] 1-power cord of electric heating system, 2-junction box of electric heating system, 3-electric heating tape, 30-heating wire, 31-heat dissipation layer, 32-insulating layer, 33-flame retardant layer, 34-protective cover, 4-temperature sensor, 5-signal line, 6-control system, 7-optical fiber line. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.
[0025] like Figure 1-3As shown, an embodiment of the utility model provides an electric heating system with fault detection and alarm functions, which includes an electric heating tape 3 for heating laid on the outer surface of a device to be heated, a temperature sensor 4 fixed to the outer surface of the electric heating tape 3 and used to detect the temperature of the electric heating tape 3, and a control system 6 connected to the temperature sensor 4 and used to display the temperature and issue an alarm.
[0026] The device to be heated can be, for example, any device that requires heating, such as a pipeline, a measuring instrument or a process equipment. The winding method of the electric heating tape 3 adapts to the shape of the device to be heated. For example, when the device to be heated is a pipeline or a tank, the electric heating tape 3 is arranged in a circular shape with equal intervals or laid directly on the outer surface of the pipeline or tank along the direction of the fluid.
[0027] Multiple groups of electric heating tape loops are laid on the outer surface of the device to be heated. The distance between adjacent electric heating tape loops is not greater than the distance between adjacent electric heating tapes inside each group of electric heating tape loops. Each group of electric heating tape loops works independently without affecting each other.
[0028] The cross-section of the electric heating tape 3 is oblate, and includes at least two heating wires 30 arranged in parallel and at intervals, a heat dissipation layer 31 covering the heating wires 30, an insulating layer 32 wrapping the heat dissipation layer 31, and a flame retardant layer 33 arranged on the outside of the insulating layer 32. The outside of the flame retardant layer 33 is wrapped with a protective cover 34. The heat dissipation layer can be, for example, an extruded PTC polymer material, the material of the insulating layer 32 can be, for example, a mineral magnesium oxide material, the thickness of the insulating layer 32 can be, for example, 0.4-2mm, preferably 0.5-1.6mm, the thickness of the flame retardant layer 33 can be, for example, 4-10mm, preferably 5-8mm, and the material of the protective cover 34 can be, for example, a ceramic silicone material.
[0029] An optical fiber line 7 parallel to the heating wire is arranged in the center of the electric heating belt 3. The optical fiber line 7 is connected to the temperature sensor 4 after passing through the electric heating belt 3 every 1-4 meters, for example, to accurately detect the temperature of the electric heating belt 3.
[0030] Each temperature sensor 4 is fixed on each independent electric heating cable loop.
[0031] Each set of electric heating tape loops is connected to the electric heating system power line 1 for power supply via the electric heating system junction box 2, and the end of the electric heating system power line 1 away from the electric heating tape 3 is connected to the main power supply.
[0032] The control system 6 is a programmable logic control system, for example, a DCS control system.
[0033] The control system 6 includes an information acquisition module, an analysis and control module, a display module and an alarm module. The input end of the information acquisition module is connected to the temperature sensor for collecting the temperature signal detected by the temperature sensor, and the output end is connected to the analysis and control module. The analysis and control module is used to detect and analyze the input temperature signal. The analysis and control module is respectively connected to the display module and the alarm module to transmit the temperature data to the display module and the alarm module. The analysis and control module obtains the temperature data from the information acquisition module and compares it with the set temperature value (for example, the temperature required for the heating device to work), so as to judge the working status of the electric heating belt. When the temperature is lower than the set temperature, the electric heating belt is in a fault state and transmits the abnormal signal to the alarm module and the display module.
[0034] The analysis and control module includes multiple submodules, the number of submodules is the same as the number of temperature sensors, and one submodule corresponds to one temperature sensor. The display module obtains and displays the temperature data of each submodule, and the display module displays the temperature arrangement position corresponding to the temperature sensor.
[0035] The temperature sensor 4 is connected to the control system 6 via a signal line 5 . Example 1
[0036] The working principle of the electric heating system with fault detection and alarm function of the utility model is as follows:
[0037] Taking the example of three electric heating belts wrapped around the pipeline, the pipeline to be heated is provided with three groups of electric heating belt loops, each group of electric heating belts is arranged on the pipeline in a circular shape with equal intervals, the spacing between each group of electric heating belt loops is about 50 cm, and the distance between adjacent electric heating belts inside each group of electric heating belt loops is about 50 cm. The electric heating belt is connected to the power supply and starts to heat the pipeline. The optical fiber line located in the center of the electric heating belt accurately detects the temperature of each electric heating belt and transmits the temperature signal to the information acquisition module. The information acquisition module outputs the data value to the three sub-modules of the analysis and control module. The sub-module outputs the temperature data to the display module to display the temperature of each group of electric heating belt loops. When one of the electric heating belt loops fails, the electric heating belt of this electric heating belt loop stops working. The analysis and control module obtains the temperature data of this electric heating belt loop from the information acquisition module, which is lower than the set temperature value, and determines that this electric heating belt loop is in a fault state and transmits the abnormal signal to the alarm module and the display module. The display module displays the abnormal temperature, and the operator obtains the location of the electric heating belt loop from the display module and performs timely repairs.
[0038] The preferred embodiments of the present invention are described above. It should be understood that the above description is exemplary and does not constitute any limitation to the present invention. Without departing from the purpose and spirit of the present invention, some changes or adjustments can be made to the present invention, and these changes or adjustments are considered to be within the scope of the present invention.
Claims
1. An electric heating system with fault detection and alarm function, characterized in that: It comprises an electric heating tape (3) for heating and laid on the outer surface of a device to be heated, a temperature sensor (4) fixed to the outer surface of the electric heating tape (3) and used to detect the temperature of the electric heating tape (3), and a control system (6) connected to the temperature sensor (4) and used to display the temperature and issue an alarm.
2. The electric heating system with fault detection and alarm function according to claim 1 is characterized in that: The winding method of the heating cable (3) is adapted to the shape of the device to be heated.
3. The electric heating system with fault detection and alarm function according to claim 1 or 2, characterized in that: A plurality of groups of electric heating tape loops are laid on the outer surface of the device to be heated, and the distance between adjacent electric heating tape loops is not greater than the distance between adjacent electric heating tapes within each group of electric heating tape loops.
4. The electric heating system with fault detection and alarm function according to claim 1 or 2, characterized in that: The cross section of the electric heating tape (3) is oblate, and comprises at least two heating wires (30) arranged in parallel and spaced apart, a heat dissipation layer (31) covering the heating wires (30), an insulating layer (32) covering the heat dissipation layer (31), and a flame retardant layer (33) arranged outside the insulating layer (32), wherein the flame retardant layer (33) is wrapped with a protective sleeve (34) outside.
5. The electric heating system with fault detection and alarm function according to claim 4, characterized in that: An optical fiber line (7) parallel to the heating wire is arranged at the center of the electric heating belt (3). The optical fiber line (7) passes through the electric heating belt (3) and is connected to the temperature sensor (4) for accurately detecting the temperature of the electric heating belt (3).
6. The electric heating system with fault detection and alarm function according to claim 3, characterized in that: Each temperature sensor (4) is fixed to each independent heating cable loop.
7. The electric heating system with fault detection and alarm function according to claim 6, characterized in that: Each set of electric heating tape loops is connected to an electric heating system power cable (1) for power supply via an electric heating system junction box (2), and one end of the electric heating system power cable (1) away from the electric heating tape (3) is connected to a main power supply.
8. The electric heating system with fault detection and alarm function according to claim 1, characterized in that: The control system (6) is a programmable logic control system. The control system (6) comprises an information acquisition module, an analysis control module, a display module and an alarm module. The input end of the information acquisition module is connected to the temperature sensor and is used to collect the temperature signal detected by the temperature sensor. The output end is connected to the analysis control module. The analysis control module is used to detect and analyze the input temperature signal. The analysis control module is respectively connected to the display module and the alarm module to transmit the temperature data to the display module and the alarm module.
9. The electric heating system with fault detection and alarm function according to claim 8, characterized in that: The analysis and control module includes multiple submodules, the number of submodules is the same as the number of temperature sensors, and one submodule corresponds to one temperature sensor. The display module obtains and displays the temperature data of each submodule, and the display module displays the temperature arrangement position corresponding to the temperature sensor.
10. The electric heating system with fault detection and alarm function according to claim 1, characterized in that: The temperature sensor (4) is connected to the control system (6) via a signal line (5).