Transformer oil temperature monitoring device in electric power operation and maintenance
By designing a combination of mounting base, connecting cap, and pressure ring, a sealed connection for the transformer oil temperature monitoring device is achieved, solving the problems of reduced insulation performance and metal corrosion caused by rainwater intrusion, and ensuring the safe and stable operation of the transformer.
Patent Information
- Application Number
- CN202520752606.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-04-21
AI Technical Summary
Existing transformer oil temperature monitoring devices are susceptible to rain in outdoor environments, which can lead to decreased insulation performance and corrosion of internal metal components, affecting the safe and stable operation of the transformer.
A transformer oil temperature monitoring device was designed, comprising a mounting base, a connecting cap, a sealing ring, and a pressure ring. By adjusting the nut and the pressure ring, a sealed connection between the temperature sensing probe and the transformer is achieved, preventing rainwater from entering.
It effectively prevents rainwater from entering the transformer, maintains insulation performance, extends the transformer's service life, and ensures the safe and stable operation of the power system.
Smart Images
Figure CN223966163U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of temperature monitoring equipment technology, and in particular to a transformer oil temperature monitoring device for power operation and maintenance. Background Technology
[0002] The oil surface thermometer, which monitors the temperature of transformer oil, is an important device to ensure the safe and stable operation of transformers. Its core function is to measure the temperature of the oil inside the transformer in real time and provide key operating parameters for maintenance personnel. It usually consists of a temperature sensing probe, an indicator dial and connecting parts. The temperature sensing probe is inserted into the transformer oil and uses temperature sensing elements such as resistance temperature detectors or thermocouples to convert the oil temperature change into an electrical signal or a change in physical quantity.
[0003] When installing an oil temperature gauge, its sensing probe is movable and inserted into the transformer through a connecting component. Since transformers are typically installed outdoors in complex environments, they are susceptible to rain. Rainwater often seeps into the transformer through the gap between the sensing probe and the mounting hole. This not only reduces the insulation performance of the transformer oil, increasing the risk of short circuits, but may also cause corrosion of internal metal components, shortening the transformer's lifespan and seriously threatening the safe and stable operation of the power system. Even if some transformers have an internal oil box to work with the oil temperature gauge to monitor the internal oil temperature, water entering the oil box will cause problems. Water has a higher thermal conductivity than transformer oil, and the mixture of water and water alters the thermal conductivity of the transformer oil, creating localized areas of uneven heat transfer within the oil. Utility Model Content
[0004] The purpose of this utility model is to provide a transformer oil temperature monitoring device for power operation and maintenance, which can effectively solve the problems in the background art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A transformer oil temperature monitoring device for power operation and maintenance includes a mounting base. A screw ring is fixedly installed at the lower end of the mounting base, and a first fixing ring is fixedly installed at the upper end of the mounting base. A connecting cap is movably connected to the first fixing ring. A sealing groove is opened in the connecting cap, and a sealing ring is inserted and connected in the sealing groove. A pressure ring is also threadedly connected in the sealing groove above the sealing ring. A temperature sensing probe is inserted and connected in the mounting base, the connecting cap, and the pressure ring. A terminal is fixedly installed at one end of the temperature sensing probe, and the terminal is electrically connected to an external temperature controller via a cable.
[0007] As a further preferred embodiment of this utility model, a first rod hole is provided in the center of the mounting base.
[0008] As a further preferred embodiment of this utility model, a second fixing ring is fixedly installed on the upper end of the first fixing ring. The longitudinal cross-section of the second fixing ring is T-shaped. The second fixing ring on the first fixing ring enables the connecting cap to rotate on the second fixing ring and provides conditions for preventing the second rod hole from detaching.
[0009] As a further preferred embodiment of this utility model, a second rod hole is provided at the bottom of the sealing groove, and multiple insert slots are also provided at the bottom of the sealing groove near the second rod hole. The multiple insert slots are arranged in a ring along the bottom contour of the sealing groove, and inserts are inserted and installed in the insert slots. A connecting groove is provided at the lower end of the connecting cap. The longitudinal section of the connecting groove is T-shaped, and the connecting groove is inserted and installed on the second fixing ring. Multiple insert slots are provided in the connecting cap, and the sealing ring adhered in the sealing groove can be pushed out by the multiple inserts in conjunction with the pressable and displaceable connecting cap.
[0010] As a further preferred embodiment of this utility model, the insert has an inverted L-shaped structure, and the lower end of the insert passes through the insert groove and abuts against the second fixing ring.
[0011] As a further preferred embodiment of this utility model, a V-shaped pressure groove is provided at the upper end of the sealing ring.
[0012] As a further preferred embodiment of this utility model, an adjusting nut is fixedly installed on the outer side of the pressure ring, and the lower end face of the pressure ring has a semi-circular structure. A V-shaped pressure groove is opened on the sealing ring. After the temperature sensing probe is installed, the lower end of the pressure ring is inserted into the V-shaped pressure groove, so that the inner side of the sealing ring is deformed by pressure and fits against the outer side of the temperature sensing probe to play a sealing role.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] In this invention, after the temperature sensing probe is installed in the connection port of the transformer via the mounting base and connecting cap, the installation position of the temperature sensing probe can be adjusted within the first rod hole, the second rod hole, and the pressure ring. Then, by rotating the pressure ring downwards within the sealing groove, the lower end of the pressure ring is inserted into the V-shaped pressure groove to apply pressure to the sealing ring. This causes the inner side of the sealing ring to deform and adhere to the outer side of the temperature sensing probe, thereby sealing the temperature sensing probe and the second rod hole and preventing external rainwater from entering the transformer through the gap between the second rod hole, the first rod hole, and the temperature sensing probe. In addition, the vertically displaceable connecting cap, in conjunction with multiple inserts, can push out the sealing ring adhered in the sealing groove. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;
[0016] Figure 2 This is a cross-sectional view of the mounting base, the first fixing ring, the connecting cap, and the pressure ring of this utility model;
[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle;
[0018] Figure 4 This is a schematic diagram of the disassembled structure of the connecting cap and insert of this utility model.
[0019] In the diagram: 1. Mounting base; 2. Threaded ring; 3. First retaining ring; 4. Connecting cap; 5. Sealing groove; 6. Sealing ring; 7. Pressure ring; 8. Temperature sensing probe; 9. Terminal; 10. First rod hole; 11. Second retaining ring; 12. Second rod hole; 13. Insert slot; 14. Connecting groove; 15. Insert; 16. V-shaped pressure groove; 17. Adjusting nut. Detailed Implementation
[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0021] like Figures 1-4 As shown, the present invention provides a transformer oil temperature monitoring device for power operation and maintenance, including a mounting base 1, a screw ring 2 fixedly installed at the lower end of the mounting base 1, a first fixing ring 3 fixedly installed at the upper end of the mounting base 1, a connecting cap 4 movably connected to the first fixing ring 3, a sealing groove 5 opened in the connecting cap 4, a sealing ring 6 inserted in the sealing groove 5, and a pressure ring 7 threadedly connected in the sealing groove 5 above the sealing ring 6, a temperature sensing probe 8 inserted in the mounting base 1, the connecting cap 4, and the pressure ring 7, a terminal 9 fixedly installed at one end of the temperature sensing probe 8, and the terminal 9 electrically connected to an external temperature controller through a cable.
[0022] like Figures 2-4As shown, a first rod hole 10 is provided in the center of the mounting base 1, and a second fixing ring 11 is fixedly installed on the upper end of the first fixing ring 3. The longitudinal section of the second fixing ring 11 is T-shaped. The second fixing ring 11 on the first fixing ring 3 allows the connecting cap 4 to rotate on the second fixing ring 11 and provides conditions for preventing the second rod hole 12 from detaching. A second rod hole 12 is provided at the bottom of the sealing groove 5, and multiple insert slots 13 are also provided at the bottom of the sealing groove 5 near the second rod hole 12. The multiple insert slots 13 are arranged along the sealing groove. 5. The bottom contour is arranged in a ring shape. Inserts 15 are inserted and installed in the insert through groove 13. The lower end of the connecting cap 4 is provided with a connecting groove 14. The longitudinal section of the connecting groove 14 is T-shaped and is inserted and installed on the second fixing ring 11. Multiple insert through grooves 13 are provided in the connecting cap 4. With the help of the pressable and displaceable connecting cap 4, the sealing ring 6 bonded in the sealing groove 5 can be pushed out by multiple inserts 15. The inserts 15 have an inverted L-shaped structure. The lower end of the inserts 15 passes through the insert through groove 13 and abuts against the second fixing ring 11.
[0023] like Figures 2-3 As shown, a V-shaped pressure groove 16 is provided on the upper end of the sealing ring 6, and an adjusting nut 17 is fixedly installed on the outer side of the pressure ring 7. The lower end face of the pressure ring 7 has a semi-circular structure. A V-shaped pressure groove 16 is provided on the sealing ring 6. After the temperature probe 8 is installed, the lower end of the pressure ring 7 is inserted into the V-shaped pressure groove 16, so that the inner side of the sealing ring 6 is deformed by pressure and fits against the outer side of the temperature probe 8 to achieve a sealing effect.
[0024] It should be noted that this utility model is a transformer oil temperature monitoring device in power operation and maintenance. When installing the temperature sensing probe 8, the mounting base 1 can be rotated to allow the screw ring 2 to be gradually screwed into the corresponding connection screw hole on the transformer. This allows the mounting base 1, together with the connecting cap 4 and the pressure ring 7, to insert the lower end of the temperature sensing probe 8 into the transformer or the oil box inside the transformer. The installation position of the temperature sensing probe 8 can be adjusted within the first rod hole 10, the second rod hole 12, and the pressure ring 7. After the temperature sensing probe 8 is installed, the adjusting nut 17 is rotated. The adjusting nut 17 then drives the pressure ring 7 to rotate downward within the sealing groove 5, allowing the lower end of the pressure ring 7 to be gradually inserted into the V-shaped pressure groove 16. This applies pressure to the sealing ring 6. As a result, the inner part of the sealing ring 6 is gradually deformed towards the outside of the temperature sensing probe 8 under the pressure of the pressure ring 7. This allows the inner part of the sealing ring 6 to deform and fit against the outside of the temperature sensing probe 8, thereby completing the seal between the second rod hole 12 and the temperature sensing probe 8.
[0025] During use, the sealing ring 6 needs to be detached from the pressure ring 7 by screwing it up during the maintenance of the temperature probe 8. This can cause irreversible deformation of the sealing ring 6 over a long period of use, resulting in it sticking to the sealing groove 5. In this case, due to the small space inside the sealing groove 5, it is not easy to remove the sealing ring 6 that is stuck inside the sealing groove 5. At this time, it is only necessary to screw the pressure ring 7 out of the sealing groove 5 and press down the connecting cap 4. This will cause the connecting cap 4 to move the sealing ring 6 down through the sealing groove 5. Since the lower end of the insert 15 in the insert groove 13 abuts against the second fixing ring 11, the sealing ring 6 is lifted up and detached from the sealing groove 5 by the multiple inserts 15, making it easy to remove the sealing ring 6 from the sealing groove 5.
[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A transformer oil temperature monitoring device for power operation and maintenance, characterized in that: The device includes a mounting base (1), a screw ring (2) is fixedly installed at the lower end of the mounting base (1), a first fixing ring (3) is fixedly installed at the upper end of the mounting base (1), a connecting cap (4) is movably connected to the first fixing ring (3), a sealing groove (5) is opened in the connecting cap (4), a sealing ring (6) is inserted and connected in the sealing groove (5), a pressure ring (7) is also threadedly connected in the sealing groove (5) above the sealing ring (6), a temperature sensing probe (8) is inserted and connected in the mounting base (1), the connecting cap (4), and the pressure ring (7), one end of the temperature sensing probe (8) is fixedly installed with a terminal (9), and the terminal (9) is electrically connected to an external temperature controller through a cable.
2. The transformer oil temperature monitoring device in power operation and maintenance according to claim 1, characterized in that: The mounting base (1) has a first rod hole (10) in the middle.
3. The transformer oil temperature monitoring device in power operation and maintenance according to claim 1, characterized in that: The upper end of the first fixing ring (3) is fixedly installed with a second fixing ring (11), and the longitudinal section of the second fixing ring (11) is T-shaped.
4. The transformer oil temperature monitoring device in power operation and maintenance according to claim 3, characterized in that: The bottom of the sealing groove (5) is provided with a second rod hole (12). The bottom of the sealing groove (5) near the second rod hole (12) is also provided with a plurality of insert slots (13). The plurality of insert slots (13) are arranged in a ring along the bottom contour of the sealing groove (5). Inserts (15) are inserted and installed in the insert slots (13). The lower end of the connecting cap (4) is provided with a connecting groove (14). The longitudinal section of the connecting groove (14) is T-shaped. The connecting groove (14) is inserted and installed on the second fixing ring (11).
5. A transformer oil temperature monitoring device for power operation and maintenance according to claim 4, characterized in that: The insert (15) has an inverted L-shaped structure, and the lower end of the insert (15) passes through the insert groove (13) and abuts against the second fixing ring (11).
6. The transformer oil temperature monitoring device in power operation and maintenance according to claim 1, characterized in that: The upper end of the sealing ring (6) is provided with a V-shaped pressure groove (16).
7. A transformer oil temperature monitoring device for power operation and maintenance according to claim 6, characterized in that: An adjusting nut (17) is fixedly installed on the outside of the pressure ring (7), and the lower end face of the pressure ring (7) has a semi-circular structure.