CN220710074U

CN220710074U - Anticreep formula transformer

Info

Publication number: CN220710074U
Application number: CN202322421219.6U
Authority: CN
Inventors: 聂永力; 时永威; 聂艳召
Original assignee: Shijiazhuang Haojing Transformer Co ltd
Current assignee: Shijiazhuang Haojing Transformer Co ltd
Priority date: 2023-09-07
Filing date: 2023-09-07
Publication date: 2024-04-02
Anticipated expiration: 2033-09-07

Abstract

The application relates to the technical field of transformers, in particular to a transformer for performing automatic pressure relief operation when the internal pressure of the transformer is increased; the application provides an anticreep formula transformer, including the box that is used for playing the accommodation, the top of box is provided with the case lid of detachable connection, and high-low pressure terminal is distributed to the upper portion of case lid, and the iron core has been arranged to the inside of box, and one side of box is provided with the circulation subassembly for normalizing fluid cooling and heat dissipation, and one side of box is provided with passive triggering, and can effectively enlarge the pressure release subassembly of fluid physics storage volume and heat dissipation after triggering; because the transformer of this application has designed circulation subassembly and pressure release subassembly, consequently can realize the conventional heat dissipation of transformer under the normality, can realize the pressure release protection of transformer under the transformer overload again.

Description

Anticreep formula transformer

Technical Field

The application relates to the technical field of transformers, in particular to a transformer capable of automatically releasing pressure when the internal pressure of the transformer is increased.

Background

In the prior art, the transformer is in a sealed state in a normal state, and components such as an iron core, a winding and the like which are soaked by grease are stored in the transformer, so that when the transformer is overloaded, the components such as the iron core, the winding and the like can generate a large amount of heat, the temperature of the oil in the oil tank can be rapidly increased, and the oil tank can generate volume expansion after absorbing heat.

Disclosure of Invention

The problem that this application will solve is that current transformer can produce a large amount of heat and lead to the inside oil pressure of transformer to rise after taking place the overload in the use, under lack and timely effectual pressure release structure circumstances, often can make the oil tank take place the irreversible deformation of box cracked problem under the oil pressure that continuously risees.

For solving above-mentioned technical problem, this application provides an anticreep formula transformer, including the box that is used for playing the accommodation, the top of box is provided with the case lid of detachable connection, and the upper portion of case lid distributes high-low pressure terminal, and the inside of box has arranged the iron core, and one side of box is provided with normalized fluid cooling and heat dissipation and uses the circulation subassembly, and one side of box is provided with passive triggering, and can effectively enlarge the pressure release subassembly of fluid physics storage volume and heat dissipation after triggering.

Because the transformer of this application has designed circulation subassembly and pressure release subassembly, consequently can realize the conventional heat dissipation of transformer under the normality, can realize the pressure release protection of transformer under the transformer overload again, solved prior art's transformer and take place the overload back in the use, can produce a large amount of heats and lead to the inside oil pressure of transformer to rise, under lacking and effectual pressure release structure circumstances in time, often can make the oil tank take place the irreversible deformation of box cracked problem under the oil pressure that continuously risees.

Drawings

Fig. 1 is a schematic perspective view of an embodiment.

Fig. 2 is a schematic diagram of the front view structure of the embodiment.

Fig. 3 is a schematic side view of an embodiment.

Fig. 4 is a schematic perspective view of a circulation assembly.

Fig. 5 is a schematic side view of a circulation assembly.

Fig. 6 is a schematic perspective view of a pressure relief assembly.

Fig. 7 is a schematic perspective view of the communicating member.

Fig. 8 is a schematic cross-sectional structure of the fixing sleeve.

Fig. 9 is a schematic cross-sectional structure of the seal ring.

Fig. 10 is a schematic cross-sectional structure of the communicating member.

In the figure: 1. high-low voltage wiring terminals; 2. a case cover; 3. a circulation assembly; 4. a pressure relief assembly; 5. a case; 6. a liquid inlet pipe; 7. a heat sink; 8. a stress relief groove; 9. a liquid return pipe; 10. a bleeder tube; 11. a cooling fin; 12. a communication member; 13. a return pipe; 14. a fixed sleeve; 15. a movable sleeve; 16. a retainer ring; 17. sealing rings; 18. a spring; 19. and an oil discharging hole.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Examples

The utility model relates to an anticreep type transformer, as shown in fig. 1-10, this transformer is including being used for playing the box 5 of accommodation, the top of box 5 is provided with the case lid 2 of dismantling the connection, the upper portion cloth of case lid 2 has high-low pressure terminal 1, the iron core has been arranged to the inside of box 5, and in order to increase the anti-pressure ability of transformer, consequently, circulating assembly 3 for normalized fluid cooling heat dissipation has been set up in one side of transformer, thereby make the inside fluid of box 5 in time flow into after the heat dissipation of circulating assembly 3 after the heat exchange with outside air, and the fluid after the heat dissipation then flows back to the inside of box 5, continue to keep radiating and insulating effect to the iron core, and when the overload is taken place to the transformer, only rely on circulating assembly 3 just not enough to dispel the heat pressure and operate, and in order to guarantee the normal running of transformer, consequently, passive pressure release assembly 4 has been set up in one side of transformer, pressure release assembly 4 only can begin to operate when the inside fluid pressure of box 5 presets the value, thereby make the inside fluid can flow into the pressure release assembly 4 in time, thereby the volume of pressure release assembly 4 can be reduced in order to increase the volume of the inside of the pressure release assembly 4, thereby can be further reduced in order to increase the volume of the pressure release assembly 4, and the volume of the pressure of fluid can be increased 4 when the pressure release assembly is increased, and the volume of the pressure of the fluid is increased 4 can be increased, and the volume is increased, and the volume of the volume is reduced, and the volume is increased, and the volume is reduced.

The circulation assembly 3 comprises a liquid inlet pipe 6, a liquid return pipe 9 and cooling fins 7, according to the buoyancy principle, the density of the cold oil is higher than that of the hot oil, so that the hot oil is located at the upper half part of the tank 5, and the cold oil is located at the lower half part of the tank 5 (here, the cold and hot oil are only relatively distinguished, so that the higher-temperature oil flows to the upper half part of the tank 5, and the lower-temperature oil flows to the lower half part of the tank 5), so that the liquid inlet pipe 6 and the liquid return pipe 9 are respectively arranged at the upper half part and the lower half part of the tank 5, and the hot oil flows back to the lower half part of the tank 5 along the liquid return pipe 9 after heat exchange, and in order to increase the heat exchange area between the oil and the outside air, the cooling fins 7 are arranged between the liquid inlet pipe 6 and the liquid return pipe 9, the number of the cooling fins 7 can be one or more, and the cooling fins 7 are of a lamellar hollow structure, and the thickness is 2-5mm, so that the heat exchange with the outside oil can be fully carried out, and the heat exchange with the outside air is not hindered.

The pressure release assembly 4 comprises a bleeder 10, a return pipe 13, cooling fins 11 and a communicating piece 12, which are the same as the circulation assembly 3, according to the buoyancy principle, the bleeder 10 is arranged at the upper half part of the tank 5, the return pipe 13 is arranged at the lower half part of the tank 5, the cooling fins 11 for communicating the bleeder 10 and the return pipe 13 are arranged between the bleeder 10 and the return pipe 13, the number of the cooling fins 11 can be arranged according to actual needs, in order to realize effective heat dissipation, the thickness of the cooling fins 11 is 2-3mm, in order to control the use time of the pressure release assembly 4, therefore, the communicating piece 12 which is passively triggered according to the oil pressure inside the tank 5 is additionally arranged inside the bleeder 10, the communicating piece 12 is in a closed state under normal state, so that the oil inside the tank 5 cannot be connected into the pressure release assembly 4, and a one-way valve is arranged at the position of the return pipe 13, so that the oil inside the tank 5 can only flow into the pressure release assembly 4 from the interior along the return pipe 13, thereby preventing the oil inside the normal state from flowing into the pressure release assembly 4.

The communicating member 12 comprises a fixed sleeve 14, a movable sleeve 15, a spring 18, a retainer ring 16 and a seal ring 17, wherein the fixed sleeve 14 is fixed inside the fixed sleeve 14 in a threaded connection manner with the inner surface of the drain pipe 10, the movable sleeve 15 which can be in sliding connection with the fixed sleeve 14 is sleeved inside the fixed sleeve 14, in order to realize elastic movement between the fixed sleeve 14 and the movable sleeve, the spring 18 with an elastic reset function is additionally arranged between the fixed sleeve and the movable sleeve, in order to prevent failure movement of excessive displacement between the movable sleeve 15 and the fixed sleeve 14, the retainer ring 16 with a displacement limiting function is fixedly arranged at one end of the movable sleeve 15, in order to realize the communicating function of the communicating member 12 (namely, communicating/sealing the box 5 with the pressure relief assembly 4), and in the circumferential direction of the other end of the movable sleeve 15, an oil discharging hole 19 is uniformly arranged, so that the oil inside the box 5 can flow into the pressure relief assembly 4 along the oil discharging hole 19, in order to prevent the oil pressure from being larger when the oil discharging hole 19 discharges oil, and to accelerate the speed of the drain pipe 10, so that the oil discharging hole 19 is in a near small spherical structure, so that the oil pressure flowing through the oil discharging hole 19 gradually decreases, and the retainer ring 16 is arranged at one end of the movable sleeve 15, so that the oil pressure is kept to be far lower than the seal ring and sealed and kept in the position along the sealing position of the oil discharging hole 17, and the oil discharging hole is kept in a normal state, and the oil discharging hole is kept in the position, and the oil.

Because the transformer is in overload, the oil liquid temperature is higher, and the temperature is usually higher than 65 ℃ (the transformer oil temperature reaches 85 ℃ and then alarms, the oil temperature reaches 95 ℃ and then jumps the transformer switch), the surface of the radiating fin 7 can be quickly heated up due to the continuously flowing hot oil liquid, and in order to avoid the metal fatigue or stress deformation of the radiating fin 7 under the continuously flowing hot oil liquid, the inwards concave stress release grooves 8 are unevenly arranged on the surface of the radiating fin 7, so that the stress generated on the surface of the radiating fin 7 can be effectively released, and the deformation of the radiating fin 7 is prevented.

When the transformer is in use, in normal operation, the pressure relief assembly 4 is in a state of not participating in heat dissipation and pressure reduction of the transformer due to the action of the communicating piece 12, oil for heat dissipation and insulation of the iron core in the box body 5 flows into the circulating assembly 3 along the liquid inlet pipe 6, is uniformly distributed by the cooling fins 7, exchanges heat with the outside air, and then flows back into the box body 5 along the liquid return pipe 9, so that the normalized heat dissipation and pressure reduction operation of the oil is realized; when overload operation of the transformer occurs, the pressure of the oil continuously acts inside the movable sleeve 15 of the communicating piece 12 when the pressure of the oil exceeds a preset value along with the continuous rising of the oil inside the box body 5, so that the spring 18 starts to receive tensile force, the static friction force between the movable sleeve 15 and the seal ring 17 is gradually changed into dynamic friction force, the movable sleeve 15 starts to generate relative displacement with the fixed sleeve 14, the oil discharge hole 19 at the end part of the movable sleeve 15 starts to be gradually exposed, so that hydraulic oil inside the box body 5 starts to flow into the pressure relief assembly 4 along the oil discharge hole 19, then flows into the cooling fin 11 along the drain pipe 10, then efficiently dissipates heat and reduces pressure through the cooling fin 11, and flows back into the box body 5 through the return pipe 13, and the one-way valve arranged at the return pipe 13 enables the oil to flow into the box body 5 only along the pressure relief assembly 4, so that the condition of oil counter-current is avoided, and the pressure reduction operation of the transformer can be effectively realized by means of physical expansion and heat dissipation operation of the pressure relief assembly 4, and stable operation of the transformer during overload operation is ensured.

It will be understood that the present application has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the application. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the application without departing from the spirit and scope thereof. Therefore, it is intended that the present application not be limited to the particular embodiments disclosed, but that the present application include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides an anticreep formula transformer, is including being used for holding box (5) of effect, and the top of box (5) is provided with case lid (2) of detachable connection, and upper portion cloth of case lid (2) has high-low pressure terminal (1), and the iron core, its characterized in that have been arranged to the inside of box (5): one side of the box body (5) is provided with a circulating component (3) for cooling and radiating normalized oil, one side of the box body (5) is provided with a passive trigger, and the pressure release component (4) for effectively expanding the physical storage volume of oil and radiating effect after the trigger.

2. A drop-resistant transformer as claimed in claim 1, wherein: the circulating assembly (3) comprises a liquid inlet pipe (6) and a liquid return pipe (9), the liquid inlet pipe (6) and the liquid return pipe (9) are respectively arranged at the upper half part and the lower half part of the box body (5), and cooling fins (7) are arranged between the liquid inlet pipe (6) and the liquid return pipe (9).

3. A drop-resistant transformer as claimed in claim 2, wherein: the number of the radiating fins (7) is one or more, the radiating fins (7) are of lamellar hollow structures, and the thickness is 2-5mm.

4. A drop-resistant transformer as claimed in claim 1, wherein: the pressure release assembly (4) comprises a drainage pipe (10) and a return pipe (13), wherein the drainage pipe (10) is arranged at the upper half part of the box body (5), the return pipe (13) is arranged at the lower half part of the box body (5), and cooling fins (11) used for communicating the drainage pipe (10) and the return pipe (13) are arranged between the drainage pipe (10) and the return pipe (13).

5. A drop-resistant transformer as claimed in claim 4, wherein: the thickness of the cooling fin (11) is 2-3mm.

6. A drop-resistant transformer as claimed in claim 4, wherein: the inside of the bleeder tube (10) is provided with a communication piece (12) which is passively triggered according to the oil pressure in the box body (5) and can realize the communication or sealing of the box body (5) and the pressure relief assembly (4), and the position of the reflux tube (13) is provided with a one-way valve which can only enable oil to flow into the box body (5) from the inside of the pressure relief assembly (4).

7. A drop-resistant transformer as claimed in claim 6, wherein: the communicating piece (12) comprises a fixed sleeve (14) and a movable sleeve (15), the fixed sleeve (14) is fixed on the inner surface of the bleeder tube (10), and the movable sleeve (15) which can be connected with the fixed sleeve (14) in a sliding way is sleeved in the fixed sleeve (14).

8. A drop-resistant transformer as claimed in claim 7, wherein: a spring (18) for realizing elastic movement between the fixed sleeve (14) and the movable sleeve (15) is further arranged between the fixed sleeve and the movable sleeve, and a retainer ring (16) for preventing excessive displacement and playing a role of displacement limiting is further fixedly arranged at one end of the movable sleeve (15).

9. A drop-resistant transformer as claimed in claim 8, wherein: the other end circumference direction of the movable sleeve (15) is evenly provided with oil discharging holes (19), the oil discharging holes (19) are of a nearly small far-sphere structure, and the positions of the oil discharging holes (19) are connected with the fixed sleeve (14), so that the sealing ring (17) can be shielded in a normal state.

10. A drop-resistant transformer as claimed in claim 3, wherein: stress relief grooves (8) for preventing the heat sink (7) from deforming and sinking inward are unevenly arranged on the surface of the heat sink (7).