Pressure release device for transformer

Abstract

The utility model discloses a pressure relief device for a transformer, which relates to the technical field of pressure relief devices and comprises an oil tank, two support frames are fixedly mounted at the bottom of the oil tank, two connecting plates are fixedly mounted at the top of the oil tank, and a connecting box is fixedly mounted on the close surfaces of the two connecting plates. An air inlet pipe is fixedly installed at the bottom of the connecting box, the air inlet pipe is communicated with the oil tank, a rotating shaft is rotationally connected to one side of the inner wall of the connecting box, and an impeller is fixedly installed on the outer wall of the rotating shaft. Through meshing connection between a second bevel gear and a first bevel gear, when the first bevel gear rotates, the second bevel gear can be driven to rotate, so that a connecting shaft rotates, then a screw rod rotates, and through threaded connection between a sliding block and the screw rod, the sliding block can move up and down when the screw rod rotates; the sliding block moves upwards to drive the connecting rod to eject the baffle open.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure relief devices, and in particular to a pressure relief device for transformers. Background Technology

[0002] During operation, transformers may experience a rapid increase in oil temperature in the tank due to internal faults. This causes the oil to decompose and produce a large amount of gas, which in turn causes the internal pressure of the transformer to rise rapidly. If the pressure cannot be released in time, it may lead to serious accidents such as transformer tank rupture or explosion. Therefore, a pressure relief device for transformers is needed.

[0003] Chinese patent provides a pressure relief device for an oil-immersed transformer, publication number CN220474417U, which includes a housing. A collecting component is fixedly connected to the left end of the housing. A lower connecting shell is fixedly connected to the lower end of the housing. A threaded pipe is fixedly connected to the lower end of the lower connecting shell. A control component is movably installed on the outer surface of the lower connecting shell. Connecting plates are fixedly connected to the lower parts of the left and right inner walls of the housing. A top plate is fixedly connected to the upper part of the inner wall of the housing. Several through holes of No. 1 are opened at the upper end of the top plate. A release component is fixedly connected to the lower end of the top plate. An upper connecting shell is fixedly connected to the upper end of the housing.

[0004] The above-mentioned device releases pressure by setting a release component, which is simple and convenient and effectively improves the stability of the device, thereby improving the pressure release effect. However, when the device is in use, a transformer failure causes the oil temperature to rise sharply, the oil decomposes and produces a large amount of gas, and the gas will continue to accumulate, causing the internal pressure of the transformer to rise rapidly. The gas discharge can easily damage the release device. Utility Model Content

[0005] The main purpose of this utility model is to provide a pressure relief device for transformers, which can effectively solve the technical problem in the background art that gas will continuously accumulate, causing the internal pressure of the transformer to rise rapidly, and the gas discharge will easily damage the relief device.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A pressure relief device for a transformer includes an oil tank. Two support frames are fixedly installed at the bottom of the oil tank, and two connecting plates are fixedly installed at the top of the oil tank. A connecting box is fixedly installed on the adjacent surfaces of the two connecting plates. An air inlet pipe is fixedly installed at the bottom of the connecting box and communicates with the oil tank. A rotating shaft is rotatably connected to one side of the inner wall of the connecting box, and an impeller is fixedly installed on the outer wall of the rotating shaft.

[0008] As a further embodiment of this utility model, a first bevel gear is fixedly installed on one side of the outer wall of the impeller, and a connecting shaft is provided on one side of the outer wall of the first bevel gear, with the bottom of the connecting shaft rotatably connected to the inner wall of the connecting box.

[0009] As a further embodiment of this utility model, a second bevel gear is fixedly installed on the bottom of the outer wall of the connecting shaft, the second bevel gear meshing with the first bevel gear, and a screw is fixedly installed on the top of the connecting shaft.

[0010] As a further embodiment of this utility model, an exhaust pipe is fixedly installed on the top of the connecting box, and a fixing ring is fixedly installed on the outer wall of the exhaust pipe near the top.

[0011] As a further embodiment of this utility model, four rotating blocks are fixedly installed on the outer wall of the fixed ring, and rotating plates are rotatably connected to the outer walls of the four rotating blocks. A baffle is fixedly installed on one side of the outer wall of each of the four rotating plates.

[0012] As a further embodiment of this utility model, the inner wall of the exhaust pipe is provided with a sliding groove, the outer wall of the sliding groove is slidably connected with a sliding block, and the sliding block is threadedly connected to a screw. Four connecting rods are fixedly installed on the top of the sliding block.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1) This transformer uses a pressure relief device. When a fault occurs during transformer operation, causing a large amount of gas to be generated in the oil tank, the continuous increase of gas causes the impeller to rotate. When the impeller rotates, it causes the first bevel gear to rotate. Through the meshing connection between the first and second bevel gears, the rotation of the first bevel gear can drive the second bevel gear to rotate, causing the connecting shaft to rotate, which in turn causes the screw to rotate. Through the threaded connection between the sliding block and the screw, the rotation of the screw can cause the sliding block to move up and down. The upward movement of the sliding block will drive the connecting rod to push open the baffle, reducing the continuous accumulation of gas during the generation process. Furthermore, the gas is guided away from the oil tank through the exhaust pipe, reducing the occurrence of accidents.

[0015] 2) The transformer uses a pressure relief device. Gas is discharged to the outside through the exhaust pipe. After the gas is discharged, the operator can rotate the screw to move the sliding block down the sliding groove and cover the top of the exhaust pipe again. This can prevent external dust and moisture from entering the oil tank, ensuring the oil tank's sealing and the normal operation of the transformer. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a pressure relief device for a transformer according to the present invention;

[0017] Figure 2 This is a schematic cross-sectional view of the connection box of a pressure relief device for a transformer according to this utility model.

[0018] Figure 3 This is a schematic diagram of the rotating shaft structure of a pressure relief device for a transformer according to the present invention;

[0019] Figure 4 This is a schematic diagram of the sliding block structure of a pressure relief device for a transformer according to the present invention.

[0020] In the diagram: 1. Oil tank; 2. Support frame; 3. Connecting plate; 4. Connecting box; 5. Inlet pipe; 6. Rotating shaft; 7. Impeller; 8. First bevel gear; 9. Connecting shaft; 10. Second bevel gear; 11. Screw; 12. Exhaust pipe; 13. Fixing ring; 14. Rotating block; 15. Rotating plate; 16. Baffle; 17. Sliding groove; 18. Sliding block; 19. Connecting rod. Detailed Implementation

[0021] 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.

[0022] Example 1

[0023] Combination Figures 1-4 A pressure relief device for a transformer includes an oil tank 1, with two support frames 2 fixedly installed at the bottom of the oil tank 1.

[0024] See Figure 1 and Figure 2 Furthermore, it is found that two connecting plates 3 are fixedly installed on the top of the oil tank 1, and a connecting box 4 is fixedly installed on the adjacent surfaces of the two connecting plates 3. An air inlet pipe 5 is fixedly installed on the bottom of the connecting box 4, and the air inlet pipe 5 is connected to the oil tank 1. A rotating shaft 6 is rotatably connected to one side of the inner wall of the connecting box 4. An impeller 7 is fixedly installed on the outer wall of the rotating shaft 6. A first bevel gear 8 is fixedly installed on one side of the outer wall of the impeller 7. A connecting shaft 9 is provided on one side of the outer wall of the first bevel gear 8, and the bottom of the connecting shaft 9 is rotatably connected to the inner wall of the connecting box 4. A second bevel gear 10 is fixedly installed near the bottom of the outer wall of the connecting shaft 9. The second bevel gear 10 meshes with the first bevel gear 8. A screw 11 is fixedly installed on the top of the connecting shaft 9.

[0025] Specifically, the oil tank 1 can fix the position of the support frame 2, the support frame 2 can support the oil tank 1, the oil tank 1 can fix the position of the connecting plate 3, the connecting plate 3 can fix the position of the connecting box 4, the connecting box 4 can fix the position of the air intake pipe 5, the connecting box 4 can rotate the rotating shaft 6, the rotating shaft 6 can fix the position of the impeller 7, the impeller 7 can fix the position of the first bevel gear 8, the connecting box 4 can rotate the connecting shaft 9, the connecting shaft 9 can fix the position of the second bevel gear 10, the second bevel gear 10 is meshed with the first bevel gear 8, the first bevel gear 8 can drive the second bevel gear 10 to rotate when it rotates, and the connecting shaft 9 can fix the position of the screw 11.

[0026] Example 2

[0027] See Figure 3 and Figure 4 Furthermore, based on Embodiment 1, an exhaust pipe 12 is fixedly installed on the top of the connecting box 4. A fixing ring 13 is fixedly installed on the top of the outer wall of the exhaust pipe 12. Four rotating blocks 14 are fixedly installed on the outer wall of the fixing ring 13. A rotating plate 15 is rotatably connected to the outer wall of each of the four rotating blocks 14. A baffle 16 is fixedly installed on one side of the outer wall of each of the four rotating plates 15. A sliding groove 17 is opened on the inner wall of the exhaust pipe 12. A sliding block 18 is slidably connected to the outer wall of the sliding groove 17. The sliding block 18 is threadedly connected to the screw 11. Four connecting rods 19 are fixedly installed on the top of the sliding block 18.

[0028] Specifically, the position of the exhaust pipe 12 can be fixed by the connecting box 4, the position of the fixing ring 13 can be fixed by the exhaust pipe 12, the position of the rotating block 14 can be fixed by the fixing ring 13, the rotating plate 15 can be rotated by the rotating block 14, the position of the plate 16 can be fixed by the rotating plate 15, the sliding block 18 can slide by the sliding groove 17, and the sliding block 18 can move up and down when the screw 11 rotates by the threaded connection between the sliding block 18 and the screw 11, and the position of the connecting rod 19 can be fixed by the sliding block 18.

[0029] In actual operation, when a fault occurs during the transformer's operation, a large amount of gas is generated in the oil tank 1. The continuous increase of gas causes the impeller 7 to rotate. When the impeller 7 rotates, the first bevel gear 8 rotates. Through the meshing connection between the second bevel gear 10 and the first bevel gear 8, the rotation of the first bevel gear 8 can drive the second bevel gear 10 to rotate, causing the connecting shaft 9 to rotate, which in turn causes the screw 11 to rotate. Through the threaded connection between the sliding block 18 and the screw 11, the rotation of the screw 11 can cause the sliding block 18 to move up and down. The upward movement of the sliding block 18 will drive the connecting rod 19 to push open the baffle, and the gas will be discharged outward through the exhaust pipe 12. After the gas is discharged, the operator can rotate the screw 11 to move the sliding block 18 downward along the sliding groove 17 and cover the top of the exhaust pipe 12 with the baffle 16 again.

[0030] 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 pressure relief device for a transformer, comprising an oil tank (1), wherein two support frames (2) are fixedly installed at the bottom of the oil tank (1), characterized in that: Two connecting plates (3) are fixedly installed on the top of the oil tank (1). A connecting box (4) is fixedly installed on the adjacent surfaces of the two connecting plates (3). An air inlet pipe (5) is fixedly installed at the bottom of the connecting box (4). The air inlet pipe (5) is connected to the oil tank (1). A rotating shaft (6) is rotatably connected to one side of the inner wall of the connecting box (4). An impeller (7) is fixedly installed on the outer wall of the rotating shaft (6).

2. The pressure relief device for a transformer according to claim 1, characterized in that: A first bevel gear (8) is fixedly installed on one side of the outer wall of the impeller (7). A connecting shaft (9) is provided on one side of the outer wall of the first bevel gear (8), and the bottom of the connecting shaft (9) is rotatably connected to the inner wall of the connecting box (4).

3. A pressure relief device for a transformer according to claim 2, characterized in that: A second bevel gear (10) is fixedly installed on the bottom of the outer wall of the connecting shaft (9). The second bevel gear (10) meshes with the first bevel gear (8). A screw (11) is fixedly installed on the top of the connecting shaft (9).

4. A pressure relief device for a transformer according to claim 1, characterized in that: An exhaust pipe (12) is fixedly installed on the top of the connecting box (4), and a fixing ring (13) is fixedly installed on the outer wall of the exhaust pipe (12) near the top.

5. A pressure relief device for a transformer according to claim 4, characterized in that: Four rotating blocks (14) are fixedly installed on the outer wall of the fixed ring (13). The outer walls of the four rotating blocks (14) are rotatably connected to rotating plates (15). A baffle (16) is fixedly installed on one side of the outer wall of the four rotating plates (15).

6. A pressure relief device for a transformer according to claim 4, characterized in that: The inner wall of the exhaust pipe (12) is provided with a sliding groove (17), and a sliding block (18) is slidably connected to the outer wall of the sliding groove (17). The sliding block (18) is threadedly connected to the screw (11), and four connecting rods (19) are fixedly installed on the top of the sliding block (18).

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