Temperature gauge plug seat leak-proof device for transformer oil tank

Abstract

The utility model relates to a thermometer plug seat oil leakage prevention device for transformer oil tank belongs to the technical field of transformer, including with the control lever of thermometer plug seat adaptation, be equipped with the control hole for the thermometer plug pipe embedding on the control lever, be equipped with the control internal thread on the inner wall of control lever opening one end, the control internal thread and the connecting external thread on the thermometer plug pipe thread cooperation, be equipped with the control external thread on the outer wall of control lever, the control external thread and the connecting internal thread on the thermometer plug seat thread cooperation. The present application can solve the problem of the oil leakage of thermometer plug seat after the long time use of transformer.

Description

Technical Field

[0001] This utility model relates to the technical field of transformers, and in particular to a leak-proof device for a thermometer plug seat in a transformer tank. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage, and the oil tank is an important component of the transformer. Its main functions include storing transformer oil, heat dissipation, and insulation.

[0003] Because the temperature inside the transformer tank directly affects the performance and lifespan of its internal insulation materials, and excessively high tank temperatures can lead to insulation aging, increasing the risk of malfunctions and impacting the transformer's stable operation, thermometers are used to monitor the oil temperature within the tank during transformer operation. The transformer tank is equipped with a thermometer plug holder that mates with the thermometer plug tube. The thermometer plug tube has an external thread at its end, and the thermometer plug holder has an internal thread that mates with this thread. The engagement of these threads secures the thermometer plug tube to the holder. However, for transformers that have been in operation for a long time, many face the problem of oil leakage from the thermometer plug holder. Furthermore, because the end of the plug holder is inside the transformer tank, leaks are difficult to manage. Summary of the Invention

[0004] To address the problem of oil leakage at the tail of the thermometer plug seat after prolonged use of a transformer, this application provides an oil leakage prevention device for the thermometer plug seat in a transformer tank.

[0005] This application provides a leak-proof device for a thermometer plug seat in a transformer tank, which adopts the following technical solution:

[0006] A leak-proof device for a thermometer plug seat in a transformer tank includes a control rod adapted to the thermometer plug seat. The control rod has a control hole for inserting a thermometer plug tube. The inner wall of the open end of the control rod has a control internal thread that engages with the connecting external thread on the thermometer plug tube. The outer wall of the control rod has a control external thread that engages with the connecting internal thread on the thermometer plug seat.

[0007] By adopting the above technical solution, when the thermometer plug seat on the transformer leaks oil, the control rod can be directly screwed into the thermometer plug seat with the cooperation of the control external thread and the connection internal thread, thereby fixing the control rod on the transformer and solving the problem of transformer plug seat oil leakage. The installation of the control rod does not require adding any additional parts to the transformer, which is low cost.

[0008] Preferably, it also includes a control part integrally formed with the control lever, the control part having a hexagonal cross-section, and the control hole penetrating through the control part.

[0009] By adopting the above technical solution, the one-piece molding reduces the seams of the oil leak prevention device, thereby greatly reducing the possibility of oil leakage. With the hexagonal design of the control unit, during the installation of the control rod, a wrench can be used in conjunction with the control unit to rotate the control rod, thereby tightening the control rod and improving the tightness of the fixation between the control rod and the thermometer plug seat.

[0010] Preferably, it further includes a positioning part integrally formed with the control rod, the positioning part being coaxial with the control rod and located between the control part and the control external thread.

[0011] By adopting the above technical solution and setting the positioning part, the sliding length of the control rod is limited on the one hand, and the oil is less likely to overflow from the connection between the thermometer plug and the control rod on the other hand, thus improving the oil leakage prevention performance of the device.

[0012] Preferably, the positioning part is provided with a sealing groove for accommodating the sealing gasket, the sealing groove is coaxial with the control hole, and the inner diameter of the sealing groove is larger than the inner diameter of the control hole.

[0013] By adopting the above technical solution and setting the sealing groove, not only is the sealing performance of the oil leakage prevention device improved, but the strength of the thermometer plug tube and the control rod can also be improved to a certain extent.

[0014] Preferably, the control lever, control unit, and positioning unit are all made of Q235 steel.

[0015] By adopting the above technical solution, Q235 steel has good plasticity and toughness, and can withstand a certain degree of deformation without easily breaking. On the other hand, Q235 steel has good thermal conductivity, which does not easily affect the operation of the thermometer plug tube, thus ensuring the normal application of the thermometer plug tube.

[0016] Preferably, the side wall thickness of the control rod is between 3mm and 3.25mm, and the bottom wall thickness of the control rod is 20mm.

[0017] By adopting the above technical solution, the side wall thickness and bottom wall thickness of the control rod are increased as much as possible without affecting the installation of the control rod and the thermometer plug tube, thereby ensuring the strength of the control rod, extending the service life of the control rod to a certain extent, and reducing the maintenance cost of the thermometer plug seat oil leakage prevention device.

[0018] Preferably, the thickness of the control unit is 10 mm.

[0019] By adopting the above technical solution, the control unit is compatible with most wrench sizes on the market, thus facilitating the installation of the control lever.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. When the thermometer plug seat on the transformer leaks oil, the control rod can be directly screwed into the thermometer plug seat with the cooperation of the control external thread and the connection internal thread, so that the control rod is fixed on the transformer and the problem of transformer plug seat oil leakage can be solved. The installation of the control rod does not require adding any additional parts to the transformer, so the cost is low.

[0022] 2. Without affecting the installation of the control rod and thermometer plug tube, the thickness of the side wall and bottom wall of the control rod should be increased as much as possible. This ensures the strength of the control rod, extends its service life to a certain extent, and reduces the maintenance cost of the thermometer plug seat oil leakage prevention device. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the oil leakage prevention device according to an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the oil leakage prevention device and the thermometer plug seat in the embodiments of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Thermometer plug seat; 11. Connecting internal thread; 2. Control rod; 21. Control hole; 22. Control internal thread; 23. Control external thread; 3. Control part; 4. Positioning part; 41. Sealing groove; 5. Oil tank. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-2 This utility model will be described in further detail.

[0027] This application discloses a leak-proof device for a thermometer plug seat in a transformer oil tank, referring to... Figure 1 and Figure 2 The device includes a control rod 2 adapted to the thermometer plug seat 1. The control rod 2 has a control hole 21 for inserting the thermometer plug tube. One end of the control rod 2 is in a closed state. The inner wall of the open end of the control rod 2 has a control internal thread 22, which is threaded to the connecting external thread on the thermometer plug tube. The outer wall of the control rod 2 has a control external thread 23, which is threaded to the connecting internal thread 11 on the thermometer plug seat 1.

[0028] In practical applications, if the thermometer plug seat 1 on the transformer leaks oil, the control rod 2 can be directly screwed into the thermometer plug seat 1 with the cooperation of the control external thread 23 and the connection internal thread 11, thereby fixing the control rod 2 on the transformer and solving the problem of oil leakage of the thermometer plug seat 1 on the transformer. The installation of the control rod 2 does not require the addition of additional parts to the transformer, and the cost is low.

[0029] The side wall thickness of control rod 2 is between 3mm and 3.25mm, and the bottom wall thickness of control rod 2 is 20mm. Without affecting the installation of control rod 2 and thermometer plug tube, the side wall thickness and bottom wall thickness of control rod 2 are increased as much as possible, thereby ensuring the strength of control rod 2, extending the service life of control rod 2 to a certain extent, and thus reducing the maintenance cost of the oil leakage prevention device of thermometer plug seat 1.

[0030] Reference Figure 1 and Figure 2 The thermometer stopper 1 oil leakage prevention device also includes a control part 3 and a positioning part 4 integrally formed with the control rod 2. This integral forming design reduces the seams of the oil leakage prevention device, thereby greatly reducing the possibility of oil leakage. The control rod 2, control part 3, and positioning part 4 are all made of Q235 steel. Q235 steel has good plasticity and toughness, capable of withstanding certain deformation without easily breaking. Furthermore, Q235 steel has good thermal conductivity, unlikely to affect the operation of the thermometer stopper tube, ensuring the normal application of the thermometer stopper tube.

[0031] Reference Figure 1 and Figure 2 The control unit 3 has a hexagonal cross-section, with a control hole 21 penetrating through it. Due to the hexagonal shape of the control unit 3, during the installation of the control rod 2, a wrench can be used in conjunction with the control unit 3 to rotate the control rod 2, thereby tightening it and improving the tightness of the fixation between the control rod 2 and the thermometer plug seat 1. The control unit 3 is 10mm thick, compatible with most wrench sizes on the market, thus facilitating the installation of the control rod 2.

[0032] Reference Figure 1 and Figure 2 The positioning part 4 is coaxial with the control rod 2, and the positioning part 4 is located between the control part 3 and the control external thread 23. The size of the positioning part 4 is slightly larger than the size of the thermometer plug seat 1 outside the transformer oil tank 5. After the control rod 2 is tightened, the positioning part 4 fits into the thermometer plug seat 1. By setting the positioning part 4, the sliding length of the control rod 2 is limited on the one hand, and the oil is not easy to overflow from the connection between the thermometer plug seat 1 and the control rod 2 on the other hand, thus improving the oil leakage prevention performance of the device.

[0033] Reference Figure 1 and Figure 2The positioning part 4 is provided with a sealing groove 41 for accommodating the sealing gasket. The sealing groove 41 is coaxial with the control hole 21. The inner diameter of the sealing groove 41 is larger than the inner diameter of the control hole 21. The sealing gasket can be made of rubber material. The sealing gasket made of rubber material has a certain deformation capability, which makes it easy for the sealing gasket to enter the sealing groove 41 through the control hole 21. By setting the sealing gasket, not only is the sealing performance of the oil leakage prevention device improved, but the strength of the thermometer plug tube and the control rod 2 can also be improved to a certain extent.

[0034] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A leak-proof device for thermometer plug seat in transformer oil tank, characterized in that, The device includes a control rod (2) adapted to a thermometer plug holder (1). The control rod (2) has a control hole (21) for inserting a thermometer plug tube. The inner wall of the open end of the control rod (2) has a control internal thread (22) that is threadedly engaged with the connecting external thread on the thermometer plug tube. The outer wall of the control rod (2) has a control external thread (23) that is threadedly engaged with the connecting internal thread (11) on the thermometer plug holder (1).

2. The anti-leakage device for a thermometer plug seat in a transformer tank according to claim 1, characterized in that, It also includes a control part (3) integrally formed with the control lever (2), the control part (3) having a hexagonal cross-section, and the control hole (21) penetrating the control part (3).

3. The anti-leakage device for a thermometer plug seat in a transformer tank according to claim 2, characterized in that, It also includes a positioning part (4) integrally formed with the control rod (2), the positioning part (4) being coaxial with the control rod (2), and the positioning part (4) being located between the control part (3) and the control external thread (23).

4. The oil leakage prevention device for a thermometer plug seat in a transformer tank according to claim 3, characterized in that, The positioning part (4) is provided with a sealing groove (41) for accommodating the sealing gasket. The sealing groove (41) is coaxial with the control hole (21), and the inner diameter of the sealing groove (41) is larger than the inner diameter of the control hole (21).

5. The anti-leakage device for a thermometer plug seat in a transformer tank according to claim 3, characterized in that, The control rod (2), control unit (3) and positioning unit (4) are all made of Q235 steel.

6. The anti-leakage device for a thermometer plug seat in a transformer tank according to claim 1, characterized in that, The side wall thickness of the control rod (2) is between 3 mm and 3.25 mm, and the bottom wall thickness of the control rod (2) is 20 mm.

7. The anti-leakage device for a thermometer plug seat in a transformer tank according to claim 3, characterized in that, The thickness of the control unit (3) is 10 mm.

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