Pressure-maintaining sealing detection device for oil-immersed transformer

Abstract

The invention discloses an oil-immersed transformer pressure-maintaining sealing detection device, and belongs to the technical field of oil-immersed transformer pressure-maintaining sealing detection, the oil-immersed transformer pressure-maintaining sealing detection device comprises a detection box, the detection box is provided with a sealing cover, the sealing cover is fixedly connected with a connecting plate, the detection box is internally provided with a limiting groove, the connecting plate is slidably connected to the limiting groove, and the limiting groove is internally provided with a sealing cover. A limiting rod is slidably connected to the connecting plate, a clamping plate is fixedly connected to one end of the limiting rod, and a threaded rod is connected to the connecting plate in a threaded mode. During use, the position of the clamping plate can be adjusted by screwing the threaded rod according to the specific size of the transformer, and it is ensured that the transformer can be firmly fixed to the detection device; the universality and flexibility of the device are greatly improved, the device can meet the detection requirements of transformers of various different specifications, rubber pads and rubber strips are arranged on the clamping plates, and the flexible materials can effectively prevent the surfaces of the transformers from being damaged in the fixing process.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure-maintaining and sealing detection of oil-immersed transformers, and in particular relates to a pressure-maintaining and sealing detection device for an oil-immersed transformer. Background Art

[0002] In the power system, oil-immersed transformers are key equipment that undertake the important tasks of voltage conversion and power transmission. Their sealing performance is directly related to the operational stability and safety of the transformer. If the transformer has a poor sealing problem, it may cause insulation oil leakage, which in turn leads to serious consequences such as degradation of insulation performance, equipment overheating, and even fire. Therefore, sealing testing of oil-immersed transformers is an important link to ensure their reliable quality and safe operation.

[0003] Traditional detection devices are usually only suitable for transformers of specific sizes. Different fixing devices need to be replaced for transformers of different sizes, which not only increases the detection cost but also reduces the detection efficiency. Summary of the Invention

[0004] The object of the present invention is to provide a pressure-maintaining and sealing detection device for an oil-immersed transformer to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a pressure-maintaining seal detection device for an oil-immersed transformer, comprising a detection box, a sealing cover provided on the detection box, a connecting plate fixedly connected to the sealing cover, a limiting groove provided in the detection box, the connecting plate slidably connected to the limiting groove, a limiting rod slidably connected to the connecting plate, one end of the limiting rod fixedly connected to a clamping plate, a threaded rod threadedly connected to the connecting plate, one end of the threaded rod rotatably disposed in a T-shaped groove provided on one side of the clamping plate, a rubber strip provided on the clamping plate, and a rubber pad provided on the clamping plate; As a further preferred embodiment of the present technical solution: a support frame is provided on one side of the detection box, a plum blossom bolt is threadedly connected to the lower end of the support frame, one end of the plum blossom bolt is threadedly connected to the detection box, a cylinder is fixedly connected to the support frame, and an output end of the cylinder is fixedly connected to the sealing cover; As a further preferred embodiment of the present technical solution: a pressure gauge is provided on the sealing cover, an air inlet pipe is provided on the sealing cover, an air inlet valve is provided on the air inlet pipe, an exhaust pipe is provided on one side of the lower end of the detection box, and an exhaust valve is provided on the exhaust pipe; As a further preferred embodiment of the present technical solution: a sealing strip is provided on the lower surface of the sealing cover, and a groove is provided on the upper end of the detection box corresponding to the sealing strip; As a further preferred embodiment of the present technical solution: the pressure gauge passes through the sealing cover, the air inlet pipe passes through the sealing cover, and the exhaust pipe passes through the detection box; As a further preferred embodiment of the present technical solution: the support frame is in a U-shape; As a further preferred embodiment of the present technical solution: the output end of the cylinder passes through the support frame; As a further preferred embodiment of the present technical solution: the connecting plates are provided in two groups, and the connecting plates are respectively provided at both ends of the sealing cover; As a further preferred embodiment of the present technical solution: the shape of the splint is L-shaped; As a further preferred embodiment of the present technical solution: two groups of the limiting rods are provided, the limiting rods are respectively provided at both ends of the clamping plate, and the limiting rods pass through the connecting plate.

[0006] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the position of the clamping plate can be adjusted by twisting the threaded rod according to the specific size of the transformer during use to ensure that the transformer can be firmly fixed on the detection device, which greatly improves the versatility and flexibility of the device, enabling it to meet the detection needs of transformers of various specifications. In addition, the clamping plate is provided with rubber pads and rubber strips. These flexible materials can effectively prevent damage to the transformer surface during the fixing process.

[0007] 2. In the present invention, by applying pressure in the detection box and monitoring the changes in the pressure gauge readings in real time, it is possible to accurately determine whether the transformer is leaking. Monitoring the pressure drop rate makes the detection process more scientific and accurate. Once the pressure drop rate exceeds a preset threshold, it can be determined that the transformer is leaking, thereby promptly discovering potential problems and ensuring the sealing of the transformer. The operation is simple, greatly improving the detection efficiency and reducing the complexity and error rate of manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the structure of a pressure-maintaining and sealing detection device for an oil-immersed transformer according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a pressure-maintaining and sealing detection device for an oil-immersed transformer according to the present invention. Figure 2 ; Figure 3 This is a cross-sectional view of a pressure-maintaining and sealing detection device for an oil-immersed transformer according to the present invention; Figure 4 The diagram is a partial structural diagram of a pressure-maintaining and sealing detection device for an oil-immersed transformer according to the present invention.

[0009] Legend: 1. Test box; 2. Sealing cover; 3. Connecting plate; 4. Limiting groove; 5. Threaded rod; 6. Clamp; 7. Limiting rod; 8. Rubber strip; 9. Rubber pad; 10. Support frame; 11. Torx bolt; 12. Cylinder; 13. Pressure gauge; 14. Intake pipe; 15. Intake valve; 16. Exhaust pipe; 17. Exhaust valve. DETAILED DESCRIPTION

[0010] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0011] Example: See Figures 1-4 As shown, the present invention provides a technical solution: a pressure-maintaining and sealing detection device for an oil-immersed transformer, comprising a detection box 1, a sealing cover 2 is provided on the detection box 1, a connecting plate 3 is fixedly connected to the sealing cover 2, a limiting groove 4 is provided in the detection box 1, the connecting plate 3 is slidably connected to the limiting groove 4, a limiting rod 7 is slidably connected to the connecting plate 3, one end of the limiting rod 7 is fixedly connected to a clamping plate 6, a threaded rod 5 is threadedly connected to the connecting plate 3, one end of the threaded rod 5 is rotatably set in a T-shaped groove opened on one side of the clamping plate 6, a rubber strip 8 is provided on the clamping plate 6, and a rubber pad 9 is provided on the clamping plate 6. When in use, the position of the clamping plate 6 can be adjusted by twisting the threaded rod 5 according to the specific size of the transformer to ensure that the transformer can be firmly fixed on the detection device, which greatly improves the versatility and flexibility of the device and enables it to meet the detection requirements of transformers of different specifications. In addition, the clamping plate 6 is provided with a rubber pad 9 and a rubber strip 8. These flexible materials can effectively prevent damage to the transformer surface during the fixing process. In this embodiment, specifically: a support frame 10 is provided on one side of the detection box 1, and the lower end of the support frame 10 is threadedly connected to a plum blossom bolt 11, one end of the plum blossom bolt 11 is threadedly connected to the detection box 1, and a cylinder 12 is fixedly connected to the support frame 10, and the output end of the cylinder 12 is fixedly connected to the sealing cover 2. By pressurizing the detection box 1 and monitoring the reading changes of the pressure gauge 13 in real time, it is possible to accurately determine whether there is a leak in the transformer. Monitoring the pressure drop rate makes the detection process more scientific and accurate. Once the pressure drop rate exceeds a preset threshold, it can be determined that there is a leak in the transformer, thereby discovering potential problems in time and ensuring the sealing of the transformer. The operation is simple, which greatly improves the detection efficiency and reduces the complexity and error rate of manual operation. In this embodiment, specifically: a pressure gauge 13 is provided on the sealing cover 2, an air inlet pipe 14 is provided on the sealing cover 2, an air inlet valve 15 is provided on the air inlet pipe 14, an exhaust pipe 16 is provided on one side of the lower end of the detection box 1, and an exhaust valve 17 is provided on the exhaust pipe 16; In this embodiment, specifically: a sealing strip is provided on the lower surface of the sealing cover 2, and a groove is provided on the upper end of the detection box 1 corresponding to the sealing strip; In this embodiment, specifically: the pressure gauge 13 passes through the sealing cover 2, the air inlet pipe 14 passes through the sealing cover 2, and the exhaust pipe 16 passes through the detection box 1; In this embodiment, specifically: the shape of the support frame 10 is U-shaped; In this embodiment, specifically: the output end of the cylinder 12 passes through the support frame 10; In this embodiment, specifically: two groups of connecting plates 3 are provided, and the connecting plates 3 are respectively provided at both ends of the sealing cover 2; In this embodiment, specifically: the shape of the splint 6 is L-shaped; In this embodiment, specifically, two groups of limiting rods 7 are provided. The limiting rods 7 are respectively provided at both ends of the clamping plate 6 , and the limiting rods 7 pass through the connecting plate 3 .

[0012] Working principle or structural principle: When in use, first open the cylinder 12, the cylinder 12 drives the sealing cover 2 to move upward, and the sealing cover 2 drives the connecting plate 3 to slide on the limiting groove 4. When the sealing cover 2 drives both sets of splints 6 out of the detection box 1, close the cylinder 12, and then place the oil-immersed transformer between the two sets of splints 6, and then respectively screw the two sets of threaded rods 5 on one side of the two sets of splints 6 to rotate. The threaded rod 5 is connected to the connecting plate 3 through a thread and drives the splint 6 to move to one side. At the same time, the splint 6 drives the limiting rod 7 to rotate on the connecting plate 3. When the two sets of splints 6 are respectively attached to both sides of the oil-immersed transformer, the fixation is completed, so that the user can fix oil-immersed transformers of different sizes during detection, and both sets of splints 6 are provided with rubber pads 9 and rubber strips 8 to prevent damage to the oil-immersed transformer. The transformer is damaged when it is fixed, and then the cylinder 12 is opened in reverse. The cylinder 12 drives the oil-immersed transformer on the splint 6 to move downward. When the sealing strip at the bottom of the sealing cover 2 fits into the groove at the upper end of the detection box 1, the output end of the air pump is connected to one end of the air inlet pipe 14 through a pipe, and then the air inlet valve 15 is opened and the exhaust valve 17 is closed. Then, the air pump is used to pressurize the detection box 1. During pressurization, the pressure in the detection box 1 is monitored in real time by observing the changes in the reading of the pointer on the pressure gauge 13. If the pressure drop rate exceeds the preset threshold, it is determined that there is a leak in the transformer. If the pressure value is relatively stable, it means that the sealing effect is good. After the detection is completed, the exhaust valve 17 is opened to discharge the gas in the detection box 1 from the exhaust pipe 16, and then the cylinder 12 is opened in reverse to take out the oil-immersed transformer.

[0013] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A pressure-maintaining and sealing detection device for an oil-immersed transformer, comprising a detection box (1), characterized in that: The detection box (1) is provided with a sealing cover (2), a connecting plate (3) is fixedly connected to the sealing cover (2), a limiting groove (4) is provided in the detection box (1), the connecting plate (3) is slidably connected to the limiting groove (4), a limiting rod (7) is slidably connected to the connecting plate (3), one end of the limiting rod (7) is fixedly connected to a clamping plate (6), a threaded rod (5) is threadedly connected to the connecting plate (3), one end of the threaded rod (5) is rotatably set in a T-shaped groove opened on one side of the clamping plate (6), a rubber strip (8) is provided on the clamping plate (6), and a rubber pad (9) is provided on the clamping plate (6).

2. The oil-immersed transformer pressure-maintaining and sealing detection device according to claim 1, characterized in that: A support frame (10) is provided on one side of the detection box (1), a plum blossom bolt (11) is threadedly connected to the lower end of the support frame (10), one end of the plum blossom bolt (11) is threadedly connected to the detection box (1), a cylinder (12) is fixedly connected to the support frame (10), and an output end of the cylinder (12) is fixedly connected to the sealing cover (2).

3. The oil-immersed transformer pressure-maintaining and sealing detection device according to claim 2, characterized in that: The sealing cover (2) is provided with a pressure gauge (13), the sealing cover (2) is provided with an air inlet pipe (14), the air inlet pipe (14) is provided with an air inlet valve (15), and an exhaust pipe (16) is provided on one side of the lower end of the detection box (1), and the exhaust pipe (16) is provided with an exhaust valve (17).

4. The oil-immersed transformer pressure-maintaining and sealing detection device according to claim 3, characterized in that: A sealing strip is provided on the lower surface of the sealing cover (2), and a groove is provided at the upper end of the detection box (1) corresponding to the sealing strip.

5. The oil-immersed transformer pressure-maintaining and sealing detection device according to claim 4, characterized in that: The pressure gauge (13) passes through the sealing cover (2), the air inlet pipe (14) passes through the sealing cover (2), and the exhaust pipe (16) passes through the detection box (1).

6. The oil-immersed transformer pressure-maintaining and sealing detection device according to claim 5, characterized in that: The support frame (10) is U-shaped.

7. The oil-immersed transformer pressure-maintaining and sealing detection device according to claim 6, characterized in that: The output end of the cylinder (12) passes through the support frame (10).

8. The oil-immersed transformer pressure-maintaining and sealing detection device according to claim 7, characterized in that: Two groups of the connecting plates (3) are provided, and the connecting plates (3) are respectively provided at both ends of the sealing cover (2).

9. The oil-immersed transformer pressure-maintaining and sealing detection device according to claim 8, characterized in that: The shape of the clamping plate (6) is L-shaped.

10. The oil-immersed transformer pressure-maintaining and sealing detection device according to claim 9, characterized in that: The limiting rods (7) are provided in two groups. The limiting rods (7) are respectively provided at both ends of the clamping plate (6). The limiting rods (7) pass through the connecting plate (3).

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