Transformer on-line monitoring device
By installing the thermistor plate monitoring device on the transformer heat sink, the problem of the temperature change of the transformer is not monitored, and the safety alarm and preventive maintenance of the transformer are achieved.
Patent Information
- Application Number
- CN202422583473.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-25
AI Technical Summary
In the prior art, the temperature change of the transformer before the failure is not effectively monitored, resulting in a decrease in insulation of the internal insulation material, which may cause explosions and fires, causing economic losses or casualties to users.
Design an online transformer monitoring device, which is used to bond the surface of the heat sink through the thermistor plate, monitors temperature changes, and alerts the maintenance personnel to take measures when the threshold is exceeded.
Real-time monitoring of the internal temperature of the transformer is achieved, insulation drop and safety accidents caused by excessive temperature are avoided, and equipment safety is ensured.
Smart Images
Figure CN223229108U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformer safety monitoring, in particular to an online transformer monitoring device. Background Art
[0002] Distribution transformers are one of the important equipment in the power supply and distribution systems of enterprises and civil buildings. Transformers convert higher voltages into lower voltages for residents to use. Oil-immersed power transformers are common outdoor transformers. The primary coil group and secondary coil group of the oil-immersed transformer are both located in a box, which is filled with cooling oil. The coil groups are immersed in the cooling oil during operation. In the process of the electromagnetic coil converting voltage and power, the heat loss generated by the iron core and coil will be dissipated by the transformer oil. The outer surface of the transformer box is equipped with many heat sinks for heat dissipation, and the heat of the cooling oil is discharged through the heat sinks.
[0003] Before a transformer experiences an internal fault, such as partial discharge, increased load, loose core components causing noise, or increased core eddy currents, the transformer's temperature will fluctuate significantly. This internal heat is dissipated into the air through the heat sink. If the temperature inside the transformer exceeds its safety threshold, the insulation inside the transformer will degrade, shortening the transformer's service life. In severe cases, this can cause the transformer to explode, catch fire, or trip, resulting in significant financial losses or casualties.
[0004] In view of the above problems, the present utility model is proposed. Utility Model Content
[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a transformer online monitoring device. Multiple devices are clamped to the transformer heat sink and the eaves of the shell, and the thermistor is closely attached to the shell to monitor the temperature changes inside the transformer, which is used to solve the problems mentioned in the background technology.
[0006] In order to solve the above technical problems, the present utility model provides the following technical solutions.
[0007] The utility model provides a transformer online monitoring device, comprising a main unit, a screw, a left clamping plate and a right clamping plate, wherein two side blocks are symmetrically arranged on the left and right sides of the main unit, the screw vertically penetrates the side blocks, the screw is threadedly connected to the side blocks, and an extrusion block is arranged at the rear end of the screw, and the extrusion block is located at the back of the main unit;
[0008] Two parallel slides are provided on the upper and lower back sides of the main unit. The left and right splints are symmetrically located on the back side of the main unit. The left and right splints are both slidably mounted in the slides. The extrusion block is abutted against the outer surfaces of the left and right splints.
[0009] The upper side of the left clamping plate close to the right clamping plate and the lower side of the right clamping plate close to the left clamping plate are both provided with thermistor sheets, and the front lower position of the host is provided with a controller and a buzzer alarm module;
[0010] The pins of the thermistor are connected to a controller, and the controller controls the connection to a buzzer alarm module.
[0011] Preferably, a handle is provided at the front end of the screw, and the handle is located at the front of the main machine.
[0012] Preferably, a plurality of reinforcing ribs are provided between the side surfaces of the side blocks and the front surface of the main unit for fixation.
[0013] Preferably, sliders are provided on the upper and lower sides of the left and right clamping plates close to the main body, and the sliders are slidably installed in the sliding grooves.
[0014] Preferably, the extrusion block includes a gradual extrusion section and a constant extrusion section, the gradual extrusion section is a truncated cone type, the constant extrusion section is a cylindrical type, the large circular surface of the gradual extrusion section is connected to one end of the constant extrusion section, and the small circular surface of the gradual extrusion section faces the side block of the splint.
[0015] Preferably, a wire hole penetrating the host is provided at an upper position on the front of the host, and the pins of the thermistor are connected to the controller through the wire hole.
[0016] Preferably, a large-capacity battery power module is also provided on the upper front side of the host. The power module circuit is connected to the controller and the buzzer alarm module. The controller power is very small and the large-capacity battery module can be used continuously for about 3 years.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] Place the main unit against the heat sink on the front of the transformer box, insert the left and right clamps into the gap between the heat sinks and make close contact. There is just one heat sink between the left and right clamps. Hold the screw handle and turn it outward. In this way, the screw drives the extrusion block to move inward. The gradual extrusion section of the extrusion block can push the left and right clamps to move toward each other to adjust the tightness of the contact surface.
[0019] As the extrusion block continues to move inward, the constant extrusion section of the extrusion block begins to squeeze the left clamping plate and the right clamping plate. At this time, the left clamping plate and the right clamping plate are completely clamped on both sides of a heat sink, so that the entire device is fixed on the front position of the heat sink;
[0020] The left and right clamps are clamped on both sides of the heat sink, and the thermistor fits perfectly on the surface of the heat sink. When the temperature of the heat sink continues to rise, the controller can sense the resistance change of the thermistor. When the temperature of the heat sink exceeds the threshold, the controller controls the buzzer to issue a voice and SMS alarm to remind management and maintenance personnel; when the temperature of the heat sink exceeds the threshold, it indicates that the temperature inside the transformer has reached a high value range, and maintenance personnel need to replace the raw materials in the transformer or take other shutdown and maintenance measures. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a three-dimensional diagram from one angle of the present invention;
[0022] Figure 2 This is a three-dimensional diagram of the present invention from another angle;
[0023] Figure 3 This is another perspective view of the present invention.
[0024] In the figure: 1. Main unit; 11. Side block; 111. Reinforcement plate; 12. Screw; 13. Twist handle; 14. Extrusion block; 15. Slide; 16. Wire hole; 17. Power module; 18. Controller; 19. Buzzer alarm module; 2. Left clamping plate; 21. Right clamping plate; 22. Slider; 23. Thermistor. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.
[0027] like Figure 1-3 As shown, a transformer online monitoring device includes a main unit 1, a screw 12, a left clamping plate 2 and a right clamping plate 21. Two side blocks 11 are symmetrically provided on the left and right sides of the main unit 1. The screw 12 vertically penetrates the side blocks 11 and is threadedly connected to the side blocks 11. A squeeze block 14 is provided at the rear end of the screw 12. The squeeze block 14 is located on the back of the main unit 1. When the screw 12 rotates, it can move forward and backward, and the squeeze block 14 can move forward and backward with the screw 12.
[0028] Two parallel slides 15 are provided on the upper and lower sides of the back of the main unit 1. The left and right splints 2 and 21 are symmetrically located on the back of the main unit 1. The left and right splints 2 and 21 are both slidably mounted in the slides 15, that is, the left and right splints 2 and 21 can move toward each other or away from each other. The extrusion block 14 is in contact with the outer surfaces of the left and right splints 2 and 21. The movement of the extrusion block 14 can cause the left and right splints 2 and 21 to move toward each other.
[0029] Thermistor sheets 23 are provided on the upper side of the left clamping plate 2 near the right clamping plate 21 and on the lower side of the right clamping plate 21 near the left clamping plate 2. A controller 18 and a buzzer alarm module 19 are provided at the lower front side of the host 1. The thermistor sheets 23 are attached to the surface of the heat sink and have different resistance values as the temperature of the heat sink changes. In this way, the controller 18 can sense the resistance change of the thermistor sheets 23.
[0030] The pins of the thermistor 23 are connected to the controller 18 , and the controller 18 controls the connection to the buzzer alarm module 19 .
[0031] A handle 13 is provided at the front end of the screw rod 12 . The handle 13 is located at the front of the main unit 1 , making it convenient to hold and rotate the screw rod 12 .
[0032] A plurality of reinforcing ribs 111 are provided between the side surfaces of the side blocks 11 and the front surface of the main unit 1 , so that the structural strength between the main unit 1 and the side blocks 11 is relatively strong.
[0033] Slide blocks 22 are provided on the upper and lower sides of the left and right clamping plates 2 and 21 , respectively, on the sides close to the main unit 1 . The slide blocks 22 are slidably mounted in the sliding grooves 15 .
[0034] The extrusion block 14 includes a gradual extrusion section and a constant extrusion section. The gradual extrusion section is a truncated cone type, and the constant extrusion section is a cylindrical type. The large circular surface of the gradual extrusion section is connected to one end of the constant extrusion section, and the small circular surface of the gradual extrusion section faces the side block 11. The gradual pressurizing section can cause the left splint 2 and the right splint 21 to move toward each other, and the constant extrusion section generates a constant extrusion force on the left splint 2 and the right splint 21. The extrusion block 14 is made of hard rubber.
[0035] A wire hole 16 passing through the host 1 is provided at the upper front side of the host 1 , and the pins of the thermistor 23 are connected to the controller 18 through the wire hole 16 .
[0036] A large-capacity battery power module 17 is also provided at the upper front side of the host 1 , and the power module 17 is circuit-connected to the controller 18 and the buzzer alarm module 19 .
[0037] To summarize: Place the main unit 1 against the heat sink on the front of the transformer box, insert the left and right plates 2, 21 between the heat sinks, so that there is just one heat sink between the left and right plates 2, 21. Hold the handle 13 and turn it outward, so that the screw 12 drives the extrusion block 14 to move outward. The gradual extrusion section of the extrusion block 14 can push the left and right plates 2, 21 to move toward each other.
[0038] As the extrusion block 14 continues to move inward, the constant extrusion section of the extrusion block 14 begins to squeeze the left clamping plate 2 and the right clamping plate 21. At this time, the left clamping plate 2 and the right clamping plate 21 are completely clamped on both sides of a heat sink. In this way, the entire device is fixed on the front position of the heat sink. This device can be deployed at multiple points to measure the temperature of the transformer.
[0039] The left clamping plate 2 and the right clamping plate 21 are clamped on both sides of the heat sink, and the thermistor 23 is just attached to the surface of the heat sink. When the temperature of the heat sink continues to rise, the controller 18 can sense the resistance change of the thermistor 23. When the temperature of the heat sink exceeds the threshold, the controller 18 controls the buzzer 19 to issue a voice and SMS alarm to remind the management and maintenance personnel; when the temperature of the heat sink exceeds the threshold, it indicates that the temperature inside the transformer is already in a higher numerical range, and the maintenance personnel need to replace the raw materials in the transformer or take other power outage maintenance measures.
[0040] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A transformer online monitoring device, characterized in that: The invention comprises a main unit (1), a screw rod (12), a left clamping plate (2) and a right clamping plate (21); two side blocks (11) are symmetrically arranged on the left and right sides of the main unit (1); the screw rod (12) vertically penetrates the side blocks (11); the screw rod (12) is threadedly connected to the side blocks (11); an extrusion block (14) is arranged at the rear end of the screw rod (12); and the extrusion block (14) is located on the back of the main unit (1); Two mutually parallel slide grooves (15) are provided on the upper and lower sides of the back of the main machine (1); the left clamping plate (2) and the right clamping plate (21) are symmetrically located on the back of the main machine (1); the left clamping plate (2) and the right clamping plate (21) are both slidably installed in the slide grooves (15); and the extrusion block (14) is abutted against the outer surfaces of the left clamping plate (2) and the right clamping plate (21); The upper side of the left clamping plate (2) close to the right clamping plate (21) and the lower side of the right clamping plate (21) close to the left clamping plate (2) are both provided with a thermistor sheet (23), and the front lower position of the host (1) is provided with a controller (18) and a buzzer alarm module (19); The pins of the thermistor sheet (23) are connected to a controller (18), and the controller (18) controls the connection to a buzzer alarm module (19).
2. The transformer online monitoring device according to claim 1, characterized in that: A screw handle (13) is provided at the front end of the screw rod (12), and the screw handle (13) is located at the front of the main machine (1).
3. The transformer online monitoring device according to claim 1, characterized in that: A plurality of reinforcing ribs (111) are provided between the side surfaces of the side blocks (11) and the front surface of the main machine (1).
4. The transformer online monitoring device according to claim 1, characterized in that: Slide blocks (22) are provided on the upper and lower sides of the left clamping plate (2) and the right clamping plate (21) close to the main machine (1), and the slide blocks (22) are slidably installed in the sliding groove (15).
5. The transformer online monitoring device according to claim 1, characterized in that: The extrusion block (14) comprises a gradual extrusion section and a constant extrusion section, wherein the gradual extrusion section is truncated cone-shaped and the constant extrusion section is cylindrical, wherein the large circular surface of the gradual extrusion section contacts one end of the constant extrusion section close to the left clamping plate (2) and the right clamping plate (21), and the small circular surface of the gradual extrusion section faces the side block (11).
6. The transformer online monitoring device according to claim 1, characterized in that: A wire hole (16) passing through the host (1) is provided at an upper front portion of the host (1), and a pin of the thermistor sheet (23) is connected to the controller (18) through the wire hole (16).
7. The transformer online monitoring device according to claim 1, characterized in that: A power supply module (17) is also provided at an upper front portion of the host (1), and the power supply module (17) is circuit-connected to a controller (18) and a buzzer alarm module (19).