CN215868914U

CN215868914U - Oil-saving oil-immersed transformer

Info

Publication number: CN215868914U
Application number: CN202121786858.7U
Authority: CN
Inventors: 张福昌; 赵良雄
Original assignee: Sichuan Fulaite Electric Power Equipment Co ltd
Current assignee: Sichuan Fulaite Electric Power Equipment Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2022-02-18
Anticipated expiration: 2031-08-02

Abstract

The utility model discloses an oil-saving oil-immersed transformer, which mainly solves the problems of high cost and high oil consumption of a radiator of the conventional oil-immersed transformer. The oil-immersed transformer comprises an oil tank filled with insulating oil, a transformer body arranged in the oil tank, radiators arranged on the periphery of the oil tank, a buffer bottom plate arranged at the bottom of the oil tank, a mounting groove formed in the buffer bottom plate, and a damping mechanism, wherein one end of the damping mechanism is arranged on the side wall of the oil tank, and the other end of the damping mechanism is fixed in the mounting groove; the radiator comprises a plurality of radiating pipe pieces, an oil circulation main pipe and an oil pump; the radiating pipe piece comprises oil pipes which are arranged in a comb shape, and wavy radiating fins welded between the oil pipes. In the utility model, the insulating oil only exists in the oil pipe, and no oil exists in the radiating fins occupying most area of the radiator, so the aim of saving oil is fulfilled. Therefore, the method is suitable for popularization and application.

Description

Oil-saving oil-immersed transformer

Technical Field

The utility model relates to an oil-immersed transformer, in particular to an oil-saving oil-immersed transformer.

Background

The distribution transformer is one of important devices in power supply and distribution systems of industrial and mining enterprises and civil buildings, reduces 10(6) kV or 35kV network voltage to 230/400V bus voltage used by users, is suitable for alternating current 50(60) Hz, three-phase maximum rated capacity 2500kVA (single-phase maximum rated capacity 833kVA, generally no single-phase transformer is recommended), can be used indoors or outdoors, can be arranged on a pole when the capacity is 315kVA or below, the ambient temperature is not higher than 40 ℃, not lower than 25 ℃, the maximum daily average temperature is 30 ℃, the maximum annual average temperature is 20 ℃, the relative humidity is not higher than 90% (ambient temperature is 25 ℃), the altitude is not higher than 1000m, and if the capacity is not in accordance with the use conditions, the appropriate rated adjustment is carried out according to relevant regulations of GB 6450-86.

With the increasing competition of the transformer industry, it becomes important to reduce the cost without reducing the performance of the transformer. At present, most of oil-immersed distribution transformers adopt corrugated radiating fins, each corrugated radiating fin needs to be filled with oil, and steel plates for manufacturing the corrugated radiating fins are not more than 2 mm. Because the thickness of the steel plate is thin, the corrugated radiating fins can be expanded after oil is filled, and the radiating area of the radiating fins is not changed too much, so that the transformer oil is further wasted, and the cost is increased. And the existing oil-immersed transformer is easy to collide in the transportation process, so that the mailbox of the transformer is damaged.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an oil-saving oil-immersed transformer, which mainly solves the problems of high cost and high oil consumption of a radiator of the conventional oil-immersed transformer.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

an oil-saving oil-immersed transformer comprises an oil tank filled with insulating oil, a transformer body arranged in the oil tank, radiators arranged on the periphery of the oil tank, a buffer bottom plate arranged at the bottom of the oil tank, an installation groove formed in the buffer bottom plate, and a damping mechanism, wherein one end of the damping mechanism is arranged on the side wall of the oil tank, and the other end of the damping mechanism is fixed in the installation groove; the radiator comprises a plurality of radiating pipe pieces, an oil circulation main pipe for connecting the radiating pipe pieces and an oil pump for insulating oil circulation flow; the radiating pipe pieces comprise oil pipes which are arranged in a comb shape, and wavy radiating fins welded among the oil pipes; the end parts of the radiating wings are inserted into the oil pipe to a certain depth so as to draw heat from the oil pipe and then radiate the heat through the wavy structure.

Further, damper is including being fixed in the connecting block of oil tank lateral wall, installs the cross axle on the connecting block, and one end rotates the connecting rod of being connected with the cross axle, rotates the buffer block of being connected and with mounting groove bottom surface sliding connection with the connecting rod other end, and one end links to each other with the buffer block side and the lateral wall fixed connection's of the other end and mounting groove buffer spring.

Further, the radiating fins are arranged between every two oil pipes at intervals.

Preferably, the oil pipe is made of a copper pipe.

Preferably, the radiating fins are made of copper strips.

Preferably, the bottom end of the buffer bottom plate is provided with a wear-resistant rubber pad.

Compared with the prior art, the utility model has the following beneficial effects:

(1) according to the utility model, by arranging the radiator, heat of the oil-immersed transformer can be radiated by the radiator during working, and the working temperature of the transformer is reduced. The oil way of the radiator is made of comb-shaped oil pipes, the oil pipes are made of copper tubes with high heat conduction efficiency, wavy radiating wings are welded between the oil pipes, and the radiating wings are made of copper strips with high heat conduction efficiency. Because the insulating oil only exists in the oil pipe, the radiating fins occupying most area of the radiator do not have oil, and therefore the purpose of saving oil is achieved.

(2) The radiating fins between every two oil pipes are arranged at intervals, and the structure can greatly improve the circulation of air between radiators, thereby further improving the radiating efficiency.

(3) The utility model has the advantages of low production cost and simple structure, and the oil consumption can be saved by 30 percent compared with the traditional corrugated radiating fin under the condition of the same radiating area.

(4) By arranging the damping mechanism, the utility model can effectively buffer the vibration generated in the transportation process of the transformer, avoid the collision between the transformers to damage the oil pipe of the radiator and prevent the leakage of insulating oil.

Drawings

Fig. 1 is a schematic top view of the present invention.

Fig. 2 is a schematic view of the front structure (with side heat-dissipating fins removed) of the present invention.

Fig. 3 is a schematic side view of a heat dissipating tube sheet according to the present invention.

Fig. 4 is a schematic structural view of the side of the heat dissipating tube sheet inserted into the oil tank according to the present invention.

Wherein, the names corresponding to the reference numbers are:

1-oil tank, 2-transformer body, 3-radiator, 4-buffer bottom plate, 5-mounting groove, 6-damping mechanism, 7-radiating fin, 8-oil circulation main pipe, 9-oil pipe, 10-radiating fin, 11-connecting block, 12-cross shaft, 13-connecting rod, 14-buffer block, 15-buffer spring and 16-wear-resistant rubber pad.

Detailed Description

The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.

Examples

As shown in fig. 1 to 4, the oil-saving oil-immersed transformer disclosed by the present invention comprises an oil tank 1 filled with insulating oil, a transformer body 2 disposed in the oil tank 1, a heat sink 3 disposed around the oil tank 1, a buffer bottom plate 4 disposed at the bottom of the oil tank 1, an installation groove 5 opened on the buffer bottom plate 4, and a damping mechanism 6 having one end disposed on the side wall of the oil tank 1 and the other end fixed in the installation groove 5; the radiator 3 comprises a plurality of radiating pipe pieces 7, an oil circulation main pipe 8 for connecting the radiating pipe pieces 7 and an oil pump for insulating oil circulation flow; the radiating fin comprises oil pipes 9 which are arranged in a comb shape, and wavy radiating fins 10 welded among the oil pipes 9; wherein the end of the fin 10 is inserted into the oil pipe 9 to a certain depth so as to extract heat from the oil pipe and then radiate the heat through the wave-shaped structure.

When the transformer works, heat is transferred to insulating oil, the oil pump pumps the insulating oil into the oil pipe, the radiating fins 10 radiate the heat, and the insulating oil returns to the oil tank from the oil circulation main pipe 8, so that the heat dissipation of the transformer is realized. The oil circuit of this radiator adopts comb type oil pipe, and oil pipe adopts the preparation of the very high copper tubing of heat conduction efficiency moreover, welds wavy heat dissipation wing between oil pipe and the oil pipe, and the heat dissipation wing adopts the preparation of the very high copper strips of heat conduction efficiency, and the heat dissipation wing between per two oil pipes adopts interval arrangement, and the circulation of air between the radiator can be improved greatly to this kind of structure, and then further improves the radiating efficiency. Because the insulating oil only exists in the oil pipe, the radiating fins occupying most area of the radiator do not have oil, and therefore the purpose of saving oil is achieved.

In this embodiment, damper all has the setting around the oil tank, damper is including being fixed in connecting block 11 of 1 lateral wall of oil tank, installs cross axle 12 on connecting block 11, and one end rotates connecting rod 13 of being connected with cross axle 12, rotates with the connecting rod 13 other end and is connected and with mounting groove 5 bottom surface sliding connection's buffer block 14, one end and buffer block 14 side link to each other and the other end and mounting groove 5's lateral wall fixed connection's buffer spring 15. Like this in the transportation, damper can effectively slow down rocking of transformer, when avoiding producing the distance transportation, insulating oil acutely rocks and takes place the spontaneous combustion phenomenon of rubbing. Meanwhile, the space of the buffer bottom plate enables the distance between the transformers to be separated, and the risk that the transformer collides to cause the damage of an oil pipe of the radiator to cause the leakage of insulating oil is avoided.

In this embodiment, the bottom end of the cushion pan 4 is provided with a wear-resistant rubber pad 16. The wear-resistant rubber pad 16 can prevent the ground from wearing the bottom side of the buffer bottom plate 4, and prolong the service life of the buffer bottom plate 4.

Through the design, the oil circuit of the radiator is made of the comb-shaped oil pipe, the oil pipe is made of the copper pipe with high heat conduction efficiency, the wavy radiating wings are welded between the oil pipe and the oil pipe, and the radiating wings are made of the copper belt with high heat conduction efficiency. Because the insulating oil only exists in the oil pipe, the radiating fins occupying most area of the radiator do not have oil, and therefore the purpose of saving oil is achieved. Thus, the present invention provides substantial improvements and features over the prior art.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or changes made within the spirit and scope of the main design of the present invention, which still solve the technical problems consistent with the present invention, should be included in the scope of the present invention.

Claims

1. The oil-saving oil-immersed transformer is characterized by comprising an oil tank (1) filled with insulating oil, a transformer body (2) arranged in the oil tank (1), radiators (3) arranged on the periphery of the oil tank (1), a buffer bottom plate (4) arranged at the bottom of the oil tank (1), a mounting groove (5) formed in the buffer bottom plate (4), and a damping mechanism (6) with one end arranged on the side wall of the oil tank (1) and the other end fixed in the mounting groove (5); the radiator (3) comprises a plurality of radiating pipe pieces (7), an oil circulation main pipe (8) used for connecting the radiating pipe pieces (7), and an oil pump used for insulating oil to flow circularly; the radiating fin comprises oil pipes (9) which are arranged in a comb shape, and wavy radiating fins (10) welded among the oil pipes (9); the end parts of the radiating wings (10) are inserted into the oil pipe (9) to a certain depth so as to draw heat from the oil pipe and then radiate the heat through the wavy structure.

2. An oil-saving oil-immersed transformer according to claim 1, wherein the damping mechanism comprises a connecting block (11) fixed on the side wall of the oil tank (1), a cross shaft (12) installed on the connecting block (11), a connecting rod (13) with one end rotatably connected with the cross shaft (12), a buffer block (14) rotatably connected with the other end of the connecting rod (13) and slidably connected with the bottom surface of the installation groove (5), and a buffer spring (15) with one end connected with the side surface of the buffer block (14) and the other end fixedly connected with the side wall of the installation groove (5).

3. An oil-saving oil-filled transformer according to claim 2, characterized in that the fins (10) are spaced between every two oil tubes.

4. A fuel-efficient oil-filled transformer according to claim 3, characterized in that the oil pipe (9) is copper tubing.

5. The oil-saving oil-immersed transformer according to claim 4, wherein the heat dissipating fins (10) are made of copper tape.

6. A fuel-efficient oil-filled transformer according to claim 5, characterized in that the bottom end of the buffer bottom plate (4) is provided with a wear-resistant rubber pad (16).