Electric heat tracing operation monitoring alarm device
By introducing a monitoring and alarm device of leakage protector and current relay into the electrical heat tracing system, the problem of difficult time discovery of abnormal situations in the electrical heat tracing system is solved, real-time monitoring and alarm of the heat tracing belt is achieved, and production safety is ensured.
Patent Information
- Application Number
- CN202422126130.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-08-30
AI Technical Summary
It is difficult to detect abnormalities in the existing electrical heating tracing systems in a timely manner, such as circuit breaking, short circuit or grounding, resulting in frozen production pipelines or equipment, and the timeliness of existing inspection methods are insufficient.
An electric heat tracing operation monitoring and alarm device is designed to monitor the current of the heat tracing belt through a leakage protector and current relay, and promptly prompt abnormalities in combination with the acoustic and light alarm light, including leakage, short circuit, circuit breaking, etc.
Real-time monitoring and alarm of the tropics are realized, abnormal situations are discovered in a timely manner, production pipelines or equipment are avoided, and safety and reliability are improved.
Smart Images
Figure CN223193398U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric heating, in particular to an electric heating operation monitoring and alarm device. Background Art
[0002] Heat tracing and insulation of pipeline equipment is one of the important measures to prevent freezing and condensation in winter. Electric heat tracing is an important part of heat tracing and insulation. Electric heat tracing is spirally wrapped or laid parallel to the equipment and pipeline, and then fixed at intervals with pressure-sensitive tape. After the electric heat tracing is laid, it is filled with insulation cotton and the outer layer is wrapped with iron or aluminum sheets.
[0003] In the existing technology, electric heating uses a 220V mains voltage, and in traditional technology, a one-circuit-one-switch circuit setting is mostly used, that is, a circuit control method that waits for a fault to occur and then trips to cut off the power supply. However, if the circuit is blocked or the heating tape is broken, there will be no tripping. After the heating tape is grounded or short-circuited, if the air circuit breaker is slightly larger in size, it may trip after the electric heating tape catches fire. Only when the air circuit breaker size is selected just right will it trip in time. Without testing, the situation where the air circuit breaker size is selected just right is rare and difficult to achieve. Therefore, in most cases, it is difficult to detect heating abnormalities in time, whether they trip or not. The current judgment measure is regular inspections, looking for exposed heating tapes and feeling the temperature by hand. This measure is not very timely, and when it is discovered again, the production pipelines or production equipment may have frozen. Utility Model Content
[0004] In view of the deficiencies of the prior art, the technical solution adopted by the present invention to solve the technical problems is: an electric heating operation monitoring and alarm device, comprising: a production pipeline; a heating tape, the outer wall of the heating tape is slidably connected to the outer wall of the production pipeline; the outer wall of the heating tape is fixedly connected to a power junction box, the end of the heating tape away from the power junction box is fixedly connected to a tail end junction box, an incoming cable is provided inside the power junction box, the outer wall of the incoming cable is slidably connected to a device distribution box, the outer wall of the device distribution box is fixedly connected to the outer door glass of the distribution box, and the interior of the device distribution box is provided with a leakage protection device. The device is provided with a current relay inside the distribution box of the device, and an audible and visual alarm light is provided inside the distribution box of the device. The inner wall of the distribution box of the device is slidably connected with a power line. The power supply of the electric heating passes through the leakage protector and the current relay. If leakage or short circuit occurs, the leakage protector will trip and the current relay will detect that the current is lower than the low alarm value, that is, undercurrent; if the electric heating is circuit-breaker or its power supply is circuit-breaker, an undercurrent alarm will also occur; if the insulation of the electric heating is poor or there is a slight short circuit, the current relay will detect overcurrent. When the current relay detects overcurrent or undercurrent, the normally open contact will close and the buzzer will flash to alarm after being energized.
[0005] Preferably, the outer wall of the leakage protector and the outer wall of the current relay are fixedly connected to the side wall inside the device distribution box, the outer wall of the sound and light alarm light is fixedly connected to the side wall inside the device distribution box, the input end of the heating tape is fixedly connected to the output end of the incoming cable, the outer wall of the heating tape and the outer wall of the incoming cable are fixedly connected to the inner wall of the power junction box, the input end of the incoming cable is fixedly connected to the output end of the current relay, and the input end of the current relay is connected to the output end of the leakage protector through an electric wire.
[0006] Preferably, the input end of the current relay and the output end of the power line are fixedly connected, the output end of the power line is fixedly connected to the input end of the sound and light alarm light, the control line of the sound and light alarm light is fixedly connected to the normally open contact of the current relay, and the light alarm light flashes to alarm after being energized. Through the outer door glass of the distribution box, workers can see the alarm light flashing, and the alarm sound can also be transmitted through the heat dissipation holes of the distribution box, thus informing nearby personnel that there is an abnormality here, so that people can know the abnormality in time.
[0007] The beneficial effects of the utility model are as follows:
[0008] 1. The utility model provides a one-to-one power supply circuit for the heating cable by setting a monitoring alarm box installed at the power supply end of the heating cable. The air switch of the power supply is a leakage protector with a rated value selected according to the heating working current. The current relay also selects the corresponding model according to the electric heating current. During the commissioning period, the rated value is set to a value 2% greater than the operating current, and the undercurrent alarm value is set to 20% of the rated value. When the monitoring box is powered on, the current relay starts working, and the power supply of the electric heating passes through the leakage protector and the current relay. If leakage or short circuit occurs, the leakage protector will trip, and the current relay will detect that the current is lower than the low alarm value, that is, undercurrent; if the electric heating is broken or its power supply is broken, an undercurrent alarm will also occur; if the insulation of the electric heating is poor or there is a slight short circuit, the current relay will detect overcurrent. When the current relay detects overcurrent or undercurrent, the normally open contact will close, and the sound and light alarm light will flash after receiving power. Through the outer door glass of the distribution box, the workers can see the alarm light flashing, and the alarm sound can also be transmitted through the heat dissipation holes of the distribution box, thus informing nearby personnel that there is an abnormality here, so that people can know the abnormality in time and deal with it in time. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is the main view of the utility model;
[0010] Figure 2 It is an electrical principle diagram of the present utility model.
[0011] In the figure: 1. Production pipeline; 2. Heating tape; 3. Tail terminal junction box; 4. Power junction box; 5. Incoming cable; 6. Device distribution box; 7. Sound and light alarm light; 8. Leakage protector; 9. Current relay; 10. Power cord; 11. Distribution box outer door glass. DETAILED DESCRIPTION
[0012] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.
[0013] Example: See Figure 1 - Figure 2 The utility model provides a technical solution: an electric heating operation monitoring and alarm device, comprising: a production pipeline 1; a heating tape 2, the outer wall of the heating tape 2 is slidably connected to the outer wall of the production pipeline 1; the outer wall of the heating tape 2 is fixedly connected to the power connection box 4, and the end of the heating tape 2 away from the power connection box 4 is fixedly connected to the tail end connection box 3. An incoming cable 5 is arranged inside the power connection box 4, and the outer wall of the incoming cable 5 is slidably connected to the device distribution box 6. The outer wall of the device distribution box 6 is fixedly connected to the distribution box outer door glass 11, and the interior of the device distribution box 6 is provided with a leakage protector 8, the interior of the device distribution box 6 is provided with a current relay 9, and the interior of the device distribution box 6 is provided with an audible and visual alarm light 7. The inner wall of the device distribution box 6 is slidably connected to the power line 10. When in use, the heating tape 2 is wrapped around the outer surface of the production pipeline 1, and the tail end connection box 3 is connected to the external circuit. The heating tape 2 is detected by the device. The device distribution box 6 of this device obtains 220V AC power from the nearest production site distribution box through the power line 10.
[0014] The outer wall of the leakage protector 8 and the outer wall of the current relay 9 are fixedly connected to the side wall inside the device distribution box 6, the outer wall of the sound and light alarm light 7 is fixedly connected to the side wall inside the device distribution box 6, the input end of the heating tape 2 is fixedly connected to the output end of the incoming cable 5, the outer wall of the heating tape 2 and the outer wall of the incoming cable 5 are fixedly connected to the inner wall of the power junction box 4, the input end of the incoming cable 5 is fixedly connected to the output end of the current relay 9, the input end of the current relay 9 is connected to the output end of the leakage protector 8 through an electric wire, and the power cord 10 is simultaneously connected to the upper port of the leakage protector 8 and the power supply terminal of the current relay 9. Inside the device distribution box 6, it is divided into two circuits: a main circuit and an alarm circuit. In the main circuit, current is supplied to the heating tape 2 outside the box through the leakage protector 8, and a current relay 9 is connected in series in the main circuit loop to detect the current size of the main circuit. The current relay 9 can display the current size in the series-connected loop.
[0015] The input end of the current relay 9 is fixedly connected to the output end of the power cord 10, the output end of the power cord 10 is fixedly connected to the input end of the sound and light alarm lamp 7, and the control line of the sound and light alarm lamp 7 is fixedly connected to the normally open contact of the current relay 9. The current relay 9 can display the current size in the series-connected circuit, and the current alarm value can be set by pressing a button. When the detected current size is greater than the rated current value or less than the undercurrent setting value, the output relay position of the current relay 9 will be activated, causing the normally open contact to close.
[0016] Working principle:
[0017] When in use, the heating tape 2 is wound around the surface of the production pipeline 1, and the tail terminal junction box 3 is connected to the external circuit. The heating tape 2 is detected through the device. The device distribution box 6 of this device obtains 220V AC power from the nearest production site distribution box through the power line 10. The power line 10 is simultaneously connected to the upper port of the leakage protector 8 and the power supply terminal of the current relay 9. Inside the device distribution box 6, it is divided into two circuits: the main circuit and the alarm circuit. In the main circuit, the current is supplied to the heating tape 2 outside the box through the leakage protector 8, and the current relay 9 is connected in series in the main circuit loop to detect the current size of the main circuit. The current relay 9 can display the current size in the series-connected circuit, and the current alarm value can be set by pressing the button. When the detected current size is greater than the rated current value or less than the undercurrent setting value, the output relay position of the current relay 9 will be activated, so that the normally open contact is closed;
[0018] The rated current of the leakage protector 8 is slightly larger than the working current of the heating cable 2 during normal operation, and it plays the role of switching the electric heating when the heating cable 2 is operating normally. When the heating cable 2 has leakage, short circuit, or overload, it will trip to protect the line. When there is a fault in the circuit that causes the leakage protector 8 to trip, the current in the circuit is zero; when there is a loose connection or disconnection in the incoming cable 5, the power junction box 4, or the heating cable 2, the current in the circuit is also zero or much smaller than the normal working current. When there is a slight short circuit in the heating cable 2, the current in the circuit will be greater than the normal working current. At this time, the abnormal increase or decrease in current will be detected by the current relay 9, and an alarm signal will be issued by comparing it with the set value. In the alarm circuit, the current is connected to the sound and light alarm light 7 through the switch inside the current relay 9. When the alarm signal of the current relay 9 is issued, the switch is closed, and the sound and light alarm light 7 emits a light signal through the outer door glass 11 of the distribution box. The alarm sound is transmitted to the external environment through the heat dissipation holes of the device distribution box 6. When the current returns to normal, the switch is reset and the alarm sound is turned off.
[0019] When in use, the monitoring alarm box is continuously powered through the power cord 10. At this time, if the leakage protector 8 that supplies power to the electric heating is not powered, the current relay 9 will be powered and the screen will light up, and an undercurrent signal will be issued. At this time, the sound and light alarm light 7 will produce a flash and a prompt sound to remind the staff that there is an error in the power supply process. The leakage protector 8 will be closed and powered. At this time, the current relay 9 screen will display the current measured current. The current will decrease as the temperature of the heating belt 2 increases until the heating belt 2 stabilizes at the rated temperature and the current drops to a stable value. At this time, the current size is recorded and the current relay is closed. The rated current value of 9 is set to a value that is 102% higher than the current value, and the undercurrent setting value is set to 20% of the rated current value. When the measured current value is greater than the rated value or is 20% lower than the rated value, the current relay 9 will send a signal, thereby causing the sound and light alarm to alarm until the value returns to normal. The current of the heating belt 2 generally fluctuates within a range during normal operation, so when short circuit, open circuit, grounding, leakage, insulation failure, tripping, etc. occur, the occurrence of special circumstances can be reflected by monitoring the current. Therefore, this device can monitor and alarm the operation of the heating belt 2.
[0020] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making any creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in this utility model shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.
Claims
1. An electric heating operation monitoring and alarm device, characterized in that: include: Production pipeline (1); A heating tape (2), the outer wall of the heating tape (2) being slidably connected to the outer wall of the production pipeline (1); The outer wall of the heating tape (2) is fixedly connected to a power junction box (4), and one end of the heating tape (2) away from the power junction box (4) is fixedly connected to a tail terminal junction box (3). An incoming cable (5) is provided inside the power junction box (4), and the outer wall of the incoming cable (5) is slidably connected to a device distribution box (6). The outer wall of the device distribution box (6) is fixedly connected to a distribution box outer door glass (11), and a leakage protector (8) is provided inside the device distribution box (6). A current relay (9) is provided inside the device distribution box (6), and an audible and visual alarm lamp (7) is provided inside the device distribution box (6). The inner wall of the device distribution box (6) is slidably connected to a power line (10).
2. The electric heat tracing operation monitoring and alarm device according to claim 1, characterized in that: The outer wall of the leakage protector (8) and the outer wall of the current relay (9) are both fixedly connected to the side wall inside the device distribution box (6), and the outer wall of the sound and light alarm lamp (7) is fixedly connected to the side wall inside the device distribution box (6).
3. The electric heat tracing operation monitoring and alarm device according to claim 1, characterized in that: The input end of the heating tape (2) is fixedly connected to the output end of the incoming cable (5), and the outer wall of the heating tape (2) and the outer wall of the incoming cable (5) are both fixedly connected to the inner wall of the power junction box (4).
4. The electric heat tracing operation monitoring and alarm device according to claim 3, characterized in that: The input end of the incoming cable (5) is fixedly connected to the output end of the current relay (9), and the input end of the current relay (9) is connected to the output end of the leakage protector (8) via an electric wire.
5. The electric heat tracing operation monitoring and alarm device according to claim 1, characterized in that: The input end of the current relay (9) is fixedly connected to the output end of the power line (10), and the output end of the power line (10) is fixedly connected to the input end of the sound and light alarm lamp (7).
6. The electric heat tracing operation monitoring and alarm device according to claim 5, characterized in that: The control line of the sound and light alarm lamp (7) is fixedly connected to the normally open contact of the current relay (9).