Power transformer oil pillow structure

Abstract

The utility model relates to power transformer technical field, concretely is a kind of power transformer oil pillow structure, including oil pillow casing, the oil pillow casing is provided with rectangular cavity part and arc cavity part. The utility model when the oil body temperature in transformer oil tank is increased, oil body in oil tank expands volume increase, overflow to oil pillow casing through oil pipe, positive pressure drives horizontal plate to move upwards, horizontal plate drives tooth plate to move upwards, tooth plate is engaged with gear, drives round bar rotation, round bar is mixed and stirs the oil body in oil pillow casing by the multiple oar of bottom setting, so that the oil body of temperature higher and the oil body of temperature lower in oil pillow casing are mutually mixed, the rate of temperature reduction is improved, the bottom of oil pillow casing is set as arc cavity part, and outside is provided with multiple heat dissipation grating, the surface area of arc surface is big, so that heat dissipation effect is better, the oil body in oil pillow casing is reduced after cooling volume, and automatically flows back in the oil tank of transformer.

Description

Technical Field

[0001] This utility model relates to the field of power transformer technology, specifically to a power transformer oil conservator structure. Background Technology

[0002] An oil conservator is an oil storage device used in transformers. Its function is to automatically adjust the oil level when the transformer experiences increased load and oil temperature rises, causing the oil in the tank to expand. Excess oil then flows into the conservator. Conversely, when the temperature drops, the oil in the conservator flows back into the tank, thus maintaining a constant oil level. In short, the conservator serves to store and replenish oil, ensuring that the transformer's oil tank remains full.

[0003] However, in the actual use of existing oil conservator structures, when the high-temperature oil from the transformer oil tank enters the oil conservator structure, the oil temperature inside the structure is reduced only by natural cooling, resulting in low cooling efficiency. Therefore, we propose a power transformer oil conservator structure to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a power transformer oil conservator structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a power transformer oil conservator structure, comprising an oil conservator shell, wherein the oil conservator shell is provided with a rectangular cavity and an arc-shaped cavity, the arc-shaped cavity of the oil conservator shell is filled with insulating oil for transformer cooling, the bottom of the oil conservator shell is connected to the transformer's oil tank through an oil pipe, a horizontal plate that can slide up and down is provided inside the oil conservator shell, an air bladder is fixedly connected to the top of the horizontal plate, a round rod is provided below the horizontal plate, multiple blades are fixedly connected to the outer bottom of the round rod, a toothed plate is fixedly connected to the bottom of the horizontal plate, a positioning rod is slidably connected inside the toothed plate, the bottom end of the positioning rod is fixedly connected to the inner bottom wall of the oil conservator shell, and a gear is fixedly connected to the outer side of the round rod, the gear meshing with the toothed plate.

[0006] More preferably, two adjacent blades are inclined, with an included angle of 10° to 60°.

[0007] More preferably, a spring is fixedly connected between the toothed plate and the bottom inner wall of the oil conservator housing, and the spring is movably sleeved on the outside of the positioning rod.

[0008] More preferably, the bottom outer side of the oil conservator housing is provided with multiple heat dissipation grilles, and the two sides of the oil conservator housing are fixedly connected with support legs for connection to the transformer.

[0009] More preferably, an air release valve is provided on the top of the oil conservator housing, and the air release valve is connected to the airbag body.

[0010] More preferably, the top of the airbag is connected to an air tube, the top of which extends to the outside of the oil pillow housing and is connected to a filter respirator.

[0011] More preferably, the airbag body is made of nylon rubber.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: When the temperature of the oil in the transformer oil tank rises, the oil in the tank expands and its volume increases. It overflows into the oil conservator shell through the oil pipe. The positive pressure drives the horizontal plate to move upward, and the horizontal plate drives the toothed plate to move upward. The toothed plate meshes with the gear, which drives the round rod to rotate. The round rod mixes and stirs the oil in the oil conservator shell through multiple blades set at the bottom, so that the oil with higher temperature mixes with the oil with lower temperature in the oil conservator shell, which improves the cooling rate. The bottom of the oil conservator shell is set as an arc-shaped cavity, and multiple heat dissipation grids are set on the outside. The large surface area of ​​the arc-shaped surface makes the heat dissipation effect better. After cooling, the oil in the oil conservator shell reduces in volume and automatically flows back into the transformer oil tank. Attached Figure Description

[0013] Figure 1 This is a front-view three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention from the left sectional view. Figure 3 This is a front sectional view of the three-dimensional structure of this utility model; Figure 4 for Figure 3 Enlarged 3D structural diagram of area A in the middle.

[0014] In the diagram: 1. Oil tank housing; 2. Horizontal plate; 3. Airbag body; 4. Oil pipe; 5. Gear plate; 6. Positioning rod; 7. Spring; 8. Round rod; 9. Gear; 10. Paddle blade; 11. Heat dissipation grille; 12. Support leg; 13. Air pipe; 14. Air release valve; 15. Filter respirator. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0016] Please see Figure 1-4This utility model provides a technical solution: a power transformer oil conservator structure, including an oil conservator shell 1, which has a rectangular cavity and an arc-shaped cavity. The arc-shaped cavity of the oil conservator shell 1 is filled with insulating oil for transformer cooling. The bottom of the oil conservator shell 1 is connected to the transformer's oil tank via an oil pipe 4. A horizontal plate 2 that can slide up and down is provided inside the oil conservator shell 1. The horizontal plate 2 is slidably connected to the inner wall of the rectangular cavity of the oil conservator shell 1. An air bladder 3 is fixedly connected to the top of the horizontal plate 2. A round rod 8 is provided below the horizontal plate 2. The two ends of the round rod 8 are rotatably connected to the inner walls of both sides of the oil conservator shell 1 via bearings. Multiple blades 10 are fixedly connected to the outer bottom of the round rod 8. A toothed plate 5 is fixedly connected to the bottom of the horizontal plate 2. A positioning rod 6 is slidably connected inside the toothed plate 5. The bottom end of the positioning rod 6 is connected to the inner bottom wall of the oil conservator shell 1. A gear 9 is fixedly connected to the outer side of the round rod 8. The gear 9 meshes with the toothed plate 5. During use, when the temperature of the oil in the transformer oil tank rises, the oil in the oil tank expands and its volume increases. It overflows into the oil conservator housing 1 through the oil pipe 4. The positive pressure drives the horizontal plate 2 to move upward, and the horizontal plate 2 drives the toothed plate 5 to move upward. The toothed plate 5 meshes with the gear 9, which drives the round rod 8 to rotate. The round rod 8 mixes and stirs the oil in the oil conservator housing 1 through multiple blades 10 set at the bottom, so that the oil with higher temperature mixes with the oil with lower temperature in the oil conservator housing 1, which improves the cooling rate. The bottom of the oil conservator housing 1 is set as an arc-shaped cavity, and multiple heat dissipation grilles 11 are set on the outside. The large surface area of ​​the arc-shaped surface makes the heat dissipation effect better. After cooling, the oil in the oil conservator housing 1 reduces in volume and automatically flows back into the transformer oil tank.

[0017] In this embodiment, specifically: two adjacent blades 10 are inclined, with an included angle of 10°~60°; In this embodiment, specifically: a spring 7 is fixedly connected between the toothed plate 5 and the bottom inner wall of the oil pillow housing 1, and the spring 7 is movably sleeved on the outside of the positioning rod 6; In this embodiment, specifically: multiple heat dissipation grilles 11 are provided on the outer bottom of the oil conservator housing 1, and support legs 12 are fixedly connected to both sides of the oil conservator housing 1 for connection with the transformer. In this embodiment, specifically: an air release valve 14 is provided on the top of the oil conservator housing 1. The air release valve 14 is connected to the airbag body 3. The model of the air release valve 14 is YSF9-55, which is a one-way air release valve. When the pressure inside the airbag body 3 is too high, the air is released through the air release valve 14 in one direction. In this embodiment, specifically: the top of the airbag 3 is connected to an air tube 13, the top of the air tube 13 extends to the outside of the oil conservator shell 1 and is connected to a filter breather 15. The filter breather 15 is model DGPT2. The filter breather 15 has the function of regulating the internal pressure of the airbag 3. During the operation of the transformer, the load and ambient temperature will change continuously, causing the transformer oil temperature to rise and fall accordingly, and the volume to expand and contract. When the oil temperature rises, the oil expands, the airbag 3 is compressed and contracts, exhaling gas; when the oil temperature drops, the oil contracts, the airbag 3 elastically returns to its original position, and draws in external air. In this embodiment, specifically: the airbag body 3 is made of nylon rubber, which is elastic and can achieve automatic reset.

[0018] In operation, when the temperature of the oil in the transformer tank rises, the oil expands and overflows into the oil conservator housing 1 through the oil pipe 4. The positive pressure drives the horizontal plate 2 to move upward, which in turn drives the toothed plate 5 to move upward. The toothed plate 5 meshes with the gear 9, causing the round rod 8 to rotate. The round rod 8 mixes and stirs the oil in the oil conservator housing 1 through multiple blades 10 at its bottom, allowing the hotter oil to mix with the cooler oil in the oil conservator housing 1, thus improving the cooling rate. The bottom of the oil conservator housing 1 is designed as an arc-shaped cavity, and multiple heat dissipation grilles 11 are provided on the outside. The large surface area of ​​the arc-shaped surface makes the heat dissipation effect better. After cooling, the oil in the oil conservator housing 1 reduces in volume and automatically flows back into the transformer tank.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A power transformer oil conservator structure, comprising an oil conservator housing (1), characterized in that: The oil conservator housing (1) is provided with a rectangular cavity and an arc-shaped cavity. The arc-shaped cavity of the oil conservator housing (1) is filled with insulating oil for transformer cooling. The bottom of the oil conservator housing (1) is connected to the transformer oil tank through an oil pipe (4). The oil conservator housing (1) is provided with a horizontal plate (2) that can slide up and down. An air bladder (3) is fixedly connected to the top of the horizontal plate (2). A round rod (8) is provided below the horizontal plate (2). Multiple blades (10) are fixedly connected to the bottom outer side of the round rod (8). A toothed plate (5) is fixedly connected to the bottom of the horizontal plate (2). A positioning rod (6) is slidably connected inside the toothed plate (5). The bottom end of the positioning rod (6) is fixedly connected to the bottom inner wall of the oil conservator housing (1). A gear (9) is fixedly connected to the outside of the round rod (8). The gear (9) meshes with the toothed plate (5).

2. The oil conservator structure of a power transformer according to claim 1, characterized in that: The two adjacent blades (10) are inclined, with an included angle of 10° to 60°.

3. The oil conservator structure of a power transformer according to claim 2, characterized in that: A spring (7) is fixedly connected between the toothed plate (5) and the bottom inner wall of the oil pillow housing (1), and the spring (7) is movably sleeved on the outside of the positioning rod (6).

4. The oil conservator structure of a power transformer according to claim 3, characterized in that: The bottom outer side of the oil conservator housing (1) is provided with multiple heat dissipation grilles (11), and the two sides of the oil conservator housing (1) are fixedly connected with support legs (12) for connecting with the transformer.

5. The oil conservator structure of a power transformer according to claim 4, characterized in that: An air release valve (14) is provided on the top of the oil pillow housing (1), and the air release valve (14) is connected to the airbag body (3).

6. The oil conservator structure of a power transformer according to claim 5, characterized in that: The top of the airbag body (3) is connected to an air tube (13), the top of which extends to the outside of the oil pillow housing (1) and is connected to a filter respirator (15).

7. The oil conservator structure of a power transformer according to claim 6, characterized in that: The airbag body (3) is made of nylon rubber.

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