Transformer oil cooling assembly

Abstract

The utility model relates to the technical field of transformer assemblies, and discloses a transformer oil cooling assembly which comprises an oil pipe assembly, the two ends of the oil pipe assembly are fixedly connected with connectors, the oil pipe assembly is composed of a metal hose and a rubber sleeve, the outer wall of the metal hose is fixedly connected with the rubber sleeve in a sleeved mode, and a spiral groove is formed in the outer wall of the rubber sleeve. According to the oil liquid cooling assembly of the transformer, through cooperation of all the components, heat of oil liquid can be transmitted to the metal hose with the excellent heat conduction performance through the coating with the excellent heat conduction performance, and the vertical metal spiral pieces with the excellent heat conduction performance are attached to the outer wall of the metal hose through the spiral grooves; and the vertical metal spiral piece is partially in direct contact with the outside, so that heat of oil flowing in the oil pipe assembly can be led out to the outside through the rubber sleeve, the heat dissipation and cooling rate of the oil in the oil pipe assembly is increased, and efficient heat dissipation and cooling of the oil of the transformer can be conveniently achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer component technical field, concretely is transformer oil cooling assembly. BACKGROUND

[0002] In the power system, the transformer as the key equipment of electric energy transmission and distribution, its stable and reliable operation is important to guarantee the safety of the whole power grid. In the operation process of transformer, due to the magnetic hysteresis loss of iron core, the resistance loss of winding and the stray loss generated by load current, a large amount of heat will be generated. If these heat cannot be effectively dissipated in time, the internal temperature of transformer will rise sharply, and then affect the insulation performance of transformer, shorten its service life, and even may cause serious safety accidents, such as insulation breakdown, winding burning, etc., cause huge economic loss and power failure accident. At present, the common cooling methods of transformer mainly include natural cooling, air cooling, forced oil circulation air cooling and forced oil circulation water cooling. Among them, the forced oil circulation cooling method can effectively improve the heat dissipation efficiency and meet the heat dissipation demand of large capacity and high load transformer by pumping the transformer oil from the oil tank, cooling through the cooling device and then sending back to the oil tank. In the forced oil circulation cooling system, the oil liquid transportation usually depends on various pipelines, and the hose is widely used in the oil liquid transportation between the transformer oil tank and the cooling device and other related components due to its flexible installation, adaptability to different space layout and other advantages.

[0003] The transformer oil assembly (oil pipe) is usually installed in the vertical direction or outside of the transformer oil tank, and the specific form depends on the transformer capacity. Small and medium capacity transformer: welding the oil pipe in the vertical direction of the oil tank wall, promoting oil circulation by increasing the heat dissipation area. Large capacity transformer: using detachable radiator, connected with the oil tank through flange. The radiator is composed of multiple heat dissipation pipes, and the upper and lower ends are connected with oil collecting boxes respectively to form an oil circulation channel. Special design: part of the transformer is provided with an oil cooler outside the oil tank, and the oil is cooled by forced circulation through the oil pump.

[0004] At present, the oil pipes of different cooling methods in the transformer are divided into immersion self-cooling type: relying on natural heat dissipation of oil pipe or radiator, suitable for small and medium capacity transformer. Oil immersion air cooling type: installing fan on the radiator, suitable for large capacity transformer. Forced oil circulation cooling: sending oil to external cooler through oil pump, suitable for super large capacity or high load transformer. Among them, the immersion self-cooling type: relying on natural heat dissipation of oil pipe or radiator, suitable for small and medium capacity transformer. The outer wall of the transformer oil assembly (oil pipe) is provided with a rubber sleeve with protective effect, but the thermal conductivity of the rubber sleeve is poor, and the rate of heat transfer from the oil liquid to the outside during the flow of the oil liquid in the oil pipe assembly is low. When the oil liquid flows through the oil pipe assembly, the oil pipe assembly cannot effectively cool the flowing oil liquid, and it is not convenient for the transformer oil liquid to realize high-efficiency heat dissipation and cooling. Utility Model Content

[0005] The purpose of this invention is to provide a transformer oil cooling assembly to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a transformer oil cooling assembly, comprising: an oil pipe assembly, both ends of which are fixedly connected to joints; the oil pipe assembly is composed of a metal hose and a rubber sleeve; the outer wall of the metal hose is fixedly fitted with the rubber sleeve; the outer wall of the rubber sleeve is provided with a spiral groove; a vertical metal spiral blade is embedded inside the spiral groove; the vertical metal spiral blade is in contact with the outer wall of the metal hose; the interior of the vertical metal spiral blade is provided with a cavity; and multiple through holes are provided on both sides of the vertical metal spiral blade.

[0007] Preferably, the inner wall of the metal hose is coated.

[0008] Preferably, the outer wall of the rubber sleeve is spirally wound with a soft sheet, and a transverse metal spiral blade is fixed to the surface of the soft sheet away from the rubber sleeve. The transverse metal spiral blade and the vertical metal spiral blade are integrally formed.

[0009] Preferably, a spiral sleeve is fixedly fitted onto the edge of the vertical metal spiral blade away from the rubber sleeve.

[0010] Preferably, a pair of screws are inserted at both ends of the transverse metal spiral blade away from the flexible sheet, and the screws sequentially pass through the transverse metal spiral blade and the flexible sheet and are threadedly connected to the rubber sleeve.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This transformer oil cooling assembly has the following advantages over traditional technology:

[0012] Through the coordinated operation of various components, the oil pipe assembly is first installed in a suitable position in the transformer tank using a connector. During subsequent use, as the oil flows inside the oil pipe assembly, the heat of the oil is transferred to the metal hose, which also has excellent thermal conductivity, through a coating with excellent thermal conductivity. Since the vertical metal spiral blades with excellent thermal conductivity are attached to the outer wall of the metal hose through the spiral grooves, and part of the vertical metal spiral blades is in direct contact with the outside, the heat of the oil flowing in the oil pipe assembly can be dissipated to the outside through the rubber sleeve, thereby increasing the heat dissipation and cooling rate of the oil in the oil pipe assembly and facilitating more efficient heat dissipation and cooling of the transformer oil.

[0013] Through the coordinated operation of various components, the airflow outside the oil pipe assembly (from external natural wind or transformer cooling fan) flows into the cavity inside the vertical metal spiral blade through the through hole on one side, and then the airflow is discharged from the through hole on the other side. The through hole and cavity can increase the contact area between the vertical metal spiral blade and the external airflow, thereby further improving the heat dissipation and cooling efficiency of the transformer oil.

[0014] Through the coordinated operation of various components, the horizontal metal spiral blade, integrally formed with the vertical metal spiral blade, has a flexible sheet fixed to its lower surface spirally wound around the outer wall of the rubber sleeve. This improves the stability of the vertical metal spiral blade as it is fitted onto the outer wall of the metal hose through the spiral groove. In addition, the horizontal metal spiral blade also increases the area on which the vertical metal spiral blade conducts heat to the outside, improving the heat dissipation and cooling effect of the oil in the tubing assembly. Furthermore, the spiral sleeve fitted on the vertical metal spiral blade away from the edge of the rubber sleeve has a certain degree of flexibility, which can buffer external impacts during subsequent use of the tubing assembly. Together with the original rubber sleeve in the tubing assembly, it can provide good protection for the metal hose, so as to ensure long-term stable use. Attached Figure Description

[0015] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent when taken in conjunction with the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0019] Figure 4 for Figure 1 A magnified view of point C in the middle.

[0020] In the diagram: 1. Oil pipe assembly, 2. Metal hose, 3. Rubber sleeve, 4. Connector, 5. Coating, 6. Spiral groove, 7. Vertical metal spiral blade, 8. Cavity, 9. Through hole, 10. Horizontal metal spiral blade, 11. Flexible sheet, 12. Spiral sleeve, 13. Screw. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-4 This utility model provides a technical solution for a transformer oil cooling assembly: The transformer oil cooling assembly includes: an oil pipe assembly 1, with connectors 4 fixedly connected to both ends of the oil pipe assembly 1. The oil pipe assembly 1 is composed of a metal hose 2 and a rubber sleeve 3. The outer wall of the metal hose 2 is fixedly fitted with the rubber sleeve 3. The outer wall of the rubber sleeve 3 is provided with a spiral groove 6. A vertical metal spiral blade 7 is embedded inside the spiral groove 6. The vertical metal spiral blade 7 is in contact with the outer wall of the metal hose 2. The interior of the vertical metal spiral blade 7 is provided with a cavity 8. Multiple through holes 9 are provided on both sides of the vertical metal spiral blade 7.

[0023] In the specific implementation process, it is worth noting that the connector 4 is made of high-strength metal material, which has excellent sealing performance and oil resistance, ensuring a tight and reliable connection with the transformer tank and preventing oil leakage. The metal hose 2 is made of metal material with good flexibility and thermal conductivity, which can not only adapt to the complex installation environment inside the transformer, but also efficiently conduct oil heat. The rubber sleeve 3 protects the metal hose 2. The spiral groove 6 ensures that the vertical metal spiral blade 7 is tightly embedded, enhancing the connection stability between components. The vertical metal spiral blade 7 is made of metal material with excellent thermal conductivity, and its internal cavity 8 allows airflow to improve heat dissipation efficiency. Multiple through holes 9 are evenly distributed on both sides of the vertical metal spiral blade 7 to ensure that airflow can smoothly enter and exit the cavity.

[0024] Furthermore, the inner wall of the metal hose 2 is provided with a coating 5.

[0025] In the specific implementation process, it is worth noting that coating 5 is an RLHY-201 type coating, a high-temperature resistant, thermally conductive, corrosion-resistant, and coking-resistant ceramic coating. It can rapidly transfer heat from the oil to the metal hose 2, greatly improving heat transfer efficiency. This coating also has good wear resistance and corrosion resistance, maintaining stable performance even under long-term oil flow and chemical corrosion environments, extending the service life of the metal hose 2. Simultaneously, the smooth surface of coating 5 reduces resistance to oil flow, facilitating smooth oil flow within the metal hose 2 and further improving heat dissipation.

[0026] Furthermore, the outer wall of the rubber sleeve 3 is spirally wound with a soft sheet 11, and a transverse metal spiral blade 10 is fixedly attached to the surface of the soft sheet 11 away from the rubber sleeve 3. The transverse metal spiral blade 10 and the vertical metal spiral blade 7 are integrally formed.

[0027] In the specific implementation process, it is worth noting that the flexible sheet 11 is made of a soft and elastic rubber material, which is tightly spirally wound around the outer wall of the rubber sleeve 3 to ensure a tight connection. The horizontal metal spiral blade 10 and the vertical metal spiral blade 7 are integrally formed. This structure makes the connection between the two more secure, with no gaps, reducing heat loss during the heat transfer process. The horizontal metal spiral blade 10 is also made of a metal material with good thermal conductivity. Its unique spiral shape increases the contact area with the external environment, enabling it to more effectively dissipate heat into the surrounding air and further improve the heat dissipation effect.

[0028] Furthermore, a spiral sleeve 12 is fixedly fitted onto the edge of the vertical metal spiral blade 7 away from the rubber sleeve 3.

[0029] In the specific implementation process, it is worth noting that the spiral sleeve 12 is made of rubber material with good flexibility and impact resistance. Its spiral shape matches the vertical metal spiral blade 7 and can be tightly fitted at the edge of the vertical metal spiral blade 7. When the oil pipe assembly 1 is subjected to external impact force, the spiral sleeve 12 can absorb part of the impact energy through its own flexible deformation, play a buffering role, and reduce the damage of the impact force to the metal hose 2 and the vertical metal spiral blade 7.

[0030] Furthermore, a pair of screws 13 are inserted at both ends of the transverse metal spiral blade 10 away from the flexible sheet 11. The screws 13 pass through the transverse metal spiral blade 10 and the flexible sheet 11 in sequence and are threadedly connected to the rubber sleeve 3.

[0031] In the specific implementation process, it is worth noting that the screw 13 can firmly connect the horizontal metal spiral blade 10, the soft plate 11 and the rubber sleeve 3 together. The screw 13 is of moderate length and can be threaded to the rubber sleeve 3 during installation, but does not penetrate the rubber sleeve, which can improve the stability between the vertical metal spiral blade 7 and the rubber sleeve 3 after installation.

[0032] Working principle:

[0033] Oil heat conduction heat dissipation principle:

[0034] First, the oil pipe assembly 1 is installed in a suitable position in the transformer tank using connector 4. During subsequent use, when the oil inside the transformer flows inside the oil pipe assembly 1, the heat carried by the oil itself is efficiently transferred to the metal hose 2, which also has excellent thermal conductivity, through the coating 5, which has excellent thermal conductivity. Due to the excellent thermal conductivity of the metal hose 2, it can quickly absorb the heat transferred from the oil. At the same time, the vertical metal spiral fins 7, which have excellent thermal conductivity, are tightly attached to the outer wall of the metal hose 2 through the spiral grooves 6, and part of the vertical metal spiral fins 7 is in direct contact with the external environment. In this way, the heat absorbed by the metal hose 2 can be quickly conducted to the vertical metal spiral fins 7. Then, through the direct contact between the vertical metal spiral fins 7 and the outside environment, the heat of the oil flowing in the oil pipe assembly 1 is conducted to the outside through the rubber sleeve 3, which effectively improves the heat dissipation and cooling rate of the oil in the oil pipe assembly, and facilitates more efficient heat dissipation and cooling of the transformer oil.

[0035] Airflow-assisted heat dissipation principle:

[0036] The airflow outside the oil pipe assembly 1 (from external natural wind or transformer cooling fan) plays an important auxiliary role in heat dissipation. This airflow flows into the cavity 8 inside the vertical metal spiral blade 7 through the through hole 9 on one side. During the flow in the cavity 8, it can fully absorb the heat conducted by the vertical metal spiral blade 7. Then, the airflow is discharged from the through hole 9 on the other side, carrying away the absorbed heat from the oil pipe assembly. The unique design of the through hole 9 and the cavity 8 can increase the contact area between the vertical metal spiral blade 7 and the external airflow, so that the heat can be carried away by the airflow more quickly and effectively, thereby further improving the heat dissipation and cooling efficiency of the transformer oil and ensuring that the transformer can maintain a good temperature state during operation.

[0037] Structural stability, protection, and heat dissipation enhancement principles:

[0038] The horizontal metal spiral blade 10, integrally formed with the vertical metal spiral blade 7, has a flexible sheet 11 fixed to its lower surface that spirally winds around the outer wall of the rubber sleeve 3. This structural design significantly improves the stability of the vertical metal spiral blade 7 as it is fitted onto the outer wall of the metal hose 2 through the spiral groove 6, ensuring that during transformer operation, the components will not loosen or shift due to vibration or other reasons, thus guaranteeing the normal operation of the heat dissipation system. Moreover, the horizontal metal spiral blade 10 also has an additional heat dissipation function, increasing the area of ​​heat conduction from the vertical metal spiral blade 7 to the outside, allowing heat to be dissipated more widely into the surrounding environment, further improving the heat dissipation and cooling effect of the oil in the oil pipe assembly 1. In addition, the spiral sleeve 12 fitted onto the edge of the vertical metal spiral blade 7 away from the rubber sleeve 3 has a certain degree of flexibility. During subsequent use of the oil pipe assembly 1, when subjected to external impact, the spiral sleeve 12 can buffer it. Together with the original rubber sleeve 3 in the oil pipe assembly 1, it can provide good protection for the metal hose 2, extending the service life of the entire cooling assembly for long-term stable use.

[0039] 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 transformer oil liquid cooling assembly comprising: The utility model provides an oil pipe assembly (1), its characterized in be: the both ends of oil pipe assembly (1) are fixed with joint (4), oil pipe assembly (1) is constituted by metal hose (2) and rubber sleeve (3), the outer wall fixed sleeve of metal hose (2) has rubber sleeve (3), the outer wall of rubber sleeve (3) is equipped with helical groove (6), the inside of helical groove (6) is embedded with vertical metal helical sheet (7), vertical metal helical sheet (7) is pasted with the outer wall of metal hose (2), the inside of vertical metal helical sheet (7) is equipped with cavity (8), and the both sides surface of vertical metal helical sheet (7) is equipped with a plurality of through -hole (9) all.

2. The transformer oil liquid cooling assembly of claim 1, wherein: The inner wall of the metal hose (2) is provided with a coating (5).

3. The transformer oil liquid cooling assembly of claim 1, wherein: The outer wall of the rubber sleeve (3) is spirally wrapped with a soft sheet (11), the surface of the soft sheet (11) away from the rubber sleeve (3) is fixed with a horizontal metal helical sheet (10), the horizontal metal helical sheet (10) and the vertical metal helical sheet (7) are an integral structure.

4. The transformer oil liquid cooling assembly of claim 1, wherein: The edge of the vertical metal helical sheet (7) away from the rubber sleeve (3) is fixedly sleeved with a helical sleeve (12).

5. The transformer oil liquid cooling assembly of claim 3, wherein: The surface of the horizontal metal helical sheet (10) away from the soft sheet (11) is inserted with a pair of screws (13) at both ends, the screws (13) are in sequence through the horizontal metal helical sheet (10) and the soft sheet (11) and are threadedly connected with the rubber sleeve (3).

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