CN215680335U

CN215680335U - Oil tank for oil-immersed transformer

Info

Publication number: CN215680335U
Application number: CN202121878680.9U
Authority: CN
Inventors: 李华波; 乐庸飞; 阚远志; 王怀注; 王孟玲; 乐庸和; 杨梦�; 阚远满; 刘强
Original assignee: Fule Electric Co ltd
Current assignee: Fule Electric Co ltd
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2022-01-28
Anticipated expiration: 2031-08-11

Abstract

The utility model discloses an oil tank for an oil-immersed transformer, which has the technical scheme that the oil tank comprises an oil tank body for bearing the transformer, wherein the oil tank body is a rectangular body, the oil tank also comprises a water storage tank, the upper surface and the lower surface of the water storage tank are sleeved outside the oil tank body and are fixedly connected with the side wall of the oil tank body, the side wall of the water storage tank surrounds the oil tank body, a barrier wall surrounding the oil tank body is arranged in the water storage tank, the space between the oil tank body and the water storage tank is divided into a cold water area and a hot water area which are mutually independent by the barrier wall, the cold water area is arranged close to the oil tank body, a water inlet communicated with the cold water area and a water outlet communicated with the hot water area are arranged outside the water storage tank, a plurality of groups of heat exchange tubes arranged along the depth direction of the water storage tank are arranged in the oil tank body, one ends of the plurality of the heat exchange tubes are communicated with the cold water area, and the other ends of the heat exchange tubes penetrate through the barrier wall and are communicated with the hot water area, the problem of prior art heat dissipation slow and the structure unstable is solved.

Description

Oil tank for oil-immersed transformer

Technical Field

The utility model relates to the technical field of transformers, in particular to an oil tank for an oil-immersed transformer.

Background

A transformer is a device that changes an alternating voltage using the principle of electromagnetic induction, and main components are a primary coil, a secondary coil, and an iron core (magnetic core). The main functions are as follows: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), and the like. According to the application, the method can be divided into: power transformers and special transformers (furnace transformers, rectification transformers, power frequency test transformers, voltage regulators, mining transformers, audio transformers, intermediate frequency transformers, high frequency transformers, impact transformers, instrument transformers, electronic transformers, reactors, mutual inductors, etc.). The transformer oil is petroleum liquid, has possibility of combustion and has defects in environmental protection. However, due to the characteristics of low price and excellent insulating property, most power transformers still use transformer oil as insulating and cooling medium. Transformer devices that use transformer oil for insulation cooling are known as oil-immersed transformers.

The common radiating fin structure of the oil-immersed transformer is used for auxiliary radiating, the common radiating fin of the oil-immersed transformer is generally communicated with the inner cavity of an oil tank, a welding installation mode is adopted, the installation and manufacturing procedures are complex, and the radiating fin is easy to damage in the transportation process; under airtight environment, the air flow between the fin is slow, or under the environment of high temperature, the speed that the fin gived off the heat is slow, and aforementioned two kinds of circumstances can cause the radiating efficiency of fin low, can not satisfy oil-immersed transformer's operating requirement.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide the oil tank which is stable in structure, high in heat dissipation efficiency, small in environmental influence factor and used for the oil-immersed transformer.

In order to achieve the purpose, the utility model provides the following technical scheme: an oil tank for an oil-immersed transformer comprises an oil tank body for bearing the transformer, the oil tank body is a rectangular body, the oil tank further comprises a water storage tank, the upper surface and the lower surface of the water storage tank are sleeved outside the oil tank body and fixedly connected with the side wall of the oil tank body, the side wall of the water storage tank surrounds the outside of the oil tank body, a barrier wall surrounding the outside of the oil tank body is arranged in the water storage tank, the space between the oil tank body and the water storage tank is divided into a cold water area and a hot water area which are mutually independent by the barrier wall, the cold water area is arranged close to the oil tank body, a water inlet communicated with the cold water area and a water outlet communicated with the hot water area are arranged outside the water storage tank, a plurality of groups of heat exchange tubes arranged along the depth direction of the water storage tank are arranged in the oil tank body, one ends of the plurality of groups of heat exchange tubes are communicated with the cold water area, and the other ends of the heat exchange tubes penetrate through the barrier wall and are communicated with the hot water area, water is injected into the cold water area through the water inlet so that the water flows through the heat exchange tube, the hot water area and the water outlet in sequence.

As a further improvement of the utility model, the number of each group of heat exchange tubes is four, the four heat exchange tubes are all positioned in the same plane, and two ends of each heat exchange tube are respectively positioned on the adjacent side walls of the oil tank body.

As a further improvement of the utility model, the part of each heat exchange tube in the oil tank body is bent to form an L shape which is consistent with the outline of the inner wall of the oil tank body, and the part of each heat exchange tube extending out of the oil tank body is vertical to the side wall of the oil tank body through which the part extends out of the oil tank body.

As a further improvement of the utility model, the adjacent heat exchange tubes in each group are symmetrically arranged.

As a further improvement of the utility model, the end parts of the heat exchange tubes in each group are arranged close to the middle part of the side wall where the heat exchange tubes are arranged.

As a further improvement of the utility model, the water inlet and the part of the heat exchange tube passing through the cold water area are both positioned on the same side of the oil tank body.

As a further improvement of the utility model, the end part of the heat exchange pipe penetrating into the hot water area is bent towards the lower surface of the water storage tank.

As a further improvement of the utility model, the water inlet is positioned outside the lower surface of the water storage tank.

As a further improvement of the utility model, the water outlet is positioned outside the lower surface of the water storage tank.

As a further improvement of the utility model, the water outlet and the water inlet are respectively positioned outside the adjacent side walls of the oil tank body.

The utility model has the beneficial effects that: the outer wall of the oil tank body is fixedly sleeved with a water storage tank, a barrier wall for dividing the inner space of the water storage tank into a cold water area and a hot water area is arranged in the water storage tank, a plurality of groups of heat exchange tubes are arranged in the oil tank body, two ends of each heat exchange tube are respectively communicated with the cold water area and the hot water area, a water inlet communicated with the cold water area and a water outlet communicated with the hot water area are arranged on the water storage tank, water is injected into the cold water area through the water inlets so that the water flows into the heat exchange tubes and reaches the hot water area, and finally the water flows away from the water outlets; in the aspect of heat dissipation efficiency, the cold water area is utilized for heat exchange to the shell of the oil tank body and the heat exchange pipe is utilized for heat exchange to the inside of the oil tank body, and compared with the design of simply adopting the radiating fins in the prior art, the double heat exchange design improves the heat exchange efficiency, the transformer is not easy to burn under the load condition, and the safety is improved; in transportation, the water storage tank protects the oil tank body, so that the oil tank body and the internal heat exchange tubes thereof are prevented from being damaged, and the transportation safety is indirectly improved; in the aspect of environmental protection, the hot water after heat exchange can be used for heating for the second time, and meets the requirements of the environment-friendly society.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of the partially cut perspective structure of FIG. 1;

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a left side view of FIG. 2;

fig. 5 is a top view of fig. 2.

Reference numerals: 1. an oil tank body; 2. a water storage tank; 3. a barrier wall; 4. a cold water region; 5. a hot water zone; 6. a water inlet; 7. a water outlet; 8. a heat exchange tube.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals.

Referring to fig. 1 to 5, the oil tank for an oil-immersed transformer in the present embodiment includes an oil tank body 1 for accommodating the transformer, where the oil tank body 1 is a rectangular body;

based on the prior art, the outer wall of the oil tank body 1 is welded with the water storage tank 2, the water storage tank 2 is designed into a rectangular body, the upper surface and the lower surface of the water storage tank 2 are both sleeved outside the oil tank body 1 and welded with the side wall of the oil tank body 1, the side wall of the water storage tank 2 surrounds the oil tank body 1, the height of the water storage tank 2 is smaller than that of the oil tank body 1, the upper surface and the lower surface of the water storage tank 2 are both positioned between the upper surface and the lower surface of the oil tank body 1, the water storage tank 2 is internally provided with a barrier wall 3 surrounding the oil tank body 1, the upper end surface and the lower end surface of the barrier wall 3 are respectively welded with the upper surface and the lower surface of the water storage tank 2, the space between the oil tank body 1 and the water storage tank 2 is divided into a cold water area 4 and a hot water area 5 which are mutually independent by the barrier wall 3, the cold water area 4 is arranged close to the oil tank body 1, the water storage tank 2 is externally provided with a water inlet 6 communicated with the cold water area 4 and a water outlet 7 communicated with the hot water area 5, a plurality of groups of heat exchange tubes 8 arranged along the depth direction of the water storage tank 2 are arranged in the oil tank body 1, the heat exchange tubes 8 are all arranged between the upper surface and the lower surface of the water storage tank 2, the number of the heat exchange tubes 8 in each group is four, all the heat exchange tubes 8 are formed by bending two ends of the heat exchange tubes respectively 90 degrees towards opposite directions through straight pipelines, eight holes are arranged on the inner wall of the oil tank body 1 at the same height, two through holes for the heat exchange tubes 8 to pass through are arranged on two side walls opposite to each other of the barrier walls, one end of one heat exchange tube 8 passes through one hole on one side wall and then passes through the barrier wall 3 until the heat exchange tube 8 is contacted with the side wall through which the heat exchange tube 8 passes and the other end of the heat exchange tube 8 corresponds to the hole on the side wall adjacent to the side wall, the heat exchange tube 8 is positioned in the oil tank body 1 by welding, and the heat exchange tube 8 is hermetically connected with the barrier wall 3 by welding, the part of the heat exchange tube 8 positioned in the oil tank body 1 is L-shaped and clings to the oil tank inner wall 1, one end of the heat exchange tube 8 positioned in the oil tank body 1 is communicated with the cold water area 4, the end part penetrating out of the oil tank body 1 extends into the hot water area 5, the other three heat exchange tubes 8 are installed according to the steps, four heat exchange tubes 8 in each group are positioned in the same plane, adjacent heat exchange tubes 8 in each group are symmetrically arranged, the end part of the heat exchange tube 8 in each group is close to the middle part of the side wall where the heat exchange tube 8 is positioned, the superposition area of the four heat exchange tubes 8 in each group and the inner wall of the oil tank body 1 is large, the heat exchange area is increased, the heat exchange efficiency is improved, the water inlet 6 and the part of the heat exchange tube 8 penetrating through the cold water area 4 are positioned on the same side of the oil tank body 1, the water inlet 6 and the water inlet end of the heat exchange tube 8 are arranged on different sides, and the water inlet 6 is preferably arranged at the middle position of the corresponding side wall, due to the design, water entering the cold water area 4 can form a vortex surrounding the oil tank body 1, so that the heat of the shell of the oil tank body 1 is effectively reduced, and the time for the cold water to enter the four heat exchange tubes 8 is almost the same, so that the heat dissipation of the interior of the oil tank body 1 is simultaneous and equivalent, and the heat in the oil tank body 1 can smoothly flow to the periphery;

in the using process, the water inlet 6 injects water into the cold water area 4, the water flows to the adjacent side walls at two sides along the side wall of the oil tank body 1, a vortex is formed in the cold water area 4 to accelerate heat dissipation of a shell of the oil tank body 1, the vortex circulation improves the heat exchange effect, then the water level in the cold water area 4 rises, when the water level rises to the first group of heat exchange tubes 8, part of cold water flows into the group of heat exchange tubes 8 and flows through the inside of the oil tank body 1, the cold water in the heat exchange tubes 8 accelerates heat dissipation in the oil tank body 1, the cold water gradually becomes hot water in the flowing process, finally the hot water flows into the hot water area 5 through the heat exchange tubes 8 and is discharged out of the hot water area 5 through the water outlet 6, the water level can continuously rise because the water inlet amount is larger than the water discharged by the heat exchange tubes 8, and the water inlet amount and the water outlet amount are balanced until all the heat exchange tubes 8 have cold water flowing through;

compared with the prior art, the design has the advantages that the radiating fins are replaced by the heat exchange tubes 8 arranged in the oil tank body 1 and the water storage tank 2 arranged outside the oil tank body 1, so that the volume of the oil tank body 1 is reduced, and the using amount of transformer oil is reduced; in the aspect of heat dissipation efficiency, the cold water area 4 is used for heat exchange of the shell of the oil tank body 1 and the heat exchange tube 8 is used for heat exchange of the inside of the oil tank body 1, compared with the design of simply adopting a radiating fin in the prior art, the double heat exchange design improves the heat exchange efficiency, the transformer is not easy to burn under the load condition, and the safety is improved; in transportation, the water storage tank 2 protects the oil tank body 1, so that the oil tank body 1 and the internal heat exchange tubes 8 thereof are prevented from being damaged, and the transportation safety is indirectly improved; in the aspect of environmental protection, the hot water after heat exchange can be used for heating for the second time, and meets the requirements of the environment-friendly society.

As a modified specific embodiment, referring to fig. 2 and 3, the end of the heat exchange tube 8 penetrating into the hot water region 5 is bent towards the lower surface of the water storage tank 2, so that the hot water has a gravitational potential energy difference, the hot water in the heat exchange tube 8 is accelerated to flow into the hot water region 5, and when the hot water in the hot water region 5 is accumulated, the hot water in the hot water region 5 can be prevented from flowing back into the hot water tube.

As a specific embodiment of the improvement, referring to fig. 2 to 5, the water inlet 6 is located outside the lower surface of the water storage tank 2, and compared with the design that the water inlet 6 is arranged on the upper surface of the water storage tank 2, the design can prevent water from flowing down from a high place to impact the water storage tank 2, and thus the service life of the water storage tank 2 is prolonged; the problem that the heat exchange tube 8 is deformed due to the impact of the water inlet 6 on the heat exchange tube 8 when the water inlet is positioned above the heat exchange tube 8 is also solved.

As a modified specific embodiment, referring to fig. 1 to 5, the water outlet 7 is located outside the lower surface of the water storage tank 2, so that compared with the water outlet 7 located on the upper surface of the water storage tank 2, the hot water can be rapidly discharged out of the hot water area 5, and the accumulation of hot water in the hot water area 5 is slowed down to affect the cold water area 4; compared with the design that the water outlet 7 is arranged on the side wall of the water storage tank 2, the water storage tank can rationalize the space utilization of the water storage tank, can avoid the phenomenon that the water outlet 7 is damaged by collision, and ensures the structural stability of the water outlet 7.

As an improved specific embodiment, referring to fig. 2 to 5, the water outlet 7 and the water inlet 6 are respectively located outside the adjacent side walls of the tank body 1, preferably, the water outlet 7 is arranged on the median vertical plane of the tank body 1, and the flow rate of the hot water flowing out of the heat exchange tubes 8 on the two opposite side walls to the water outlet 7 is reduced, so as to ensure that the hot water in the hot water region 5 flows out smoothly.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. The utility model provides an oil tank that oil-immersed transformer used, is including oil tank body (1) of bearing dress transformer, oil tank body (1) is the cuboid, its characterized in that: the water tank is characterized by further comprising a water storage tank (2), wherein the upper surface and the lower surface of the water storage tank (2) are sleeved outside the oil tank body (1) and fixedly connected with the side wall of the oil tank body (1), the side wall of the water storage tank (2) surrounds the oil tank body (1), a barrier wall (3) surrounding the oil tank body (1) is arranged in the water storage tank (2), the space between the oil tank body (1) and the water storage tank (2) is divided into a cold water area (4) and a hot water area (5) which are mutually independent by the barrier wall (3), the cold water area (4) is arranged close to the oil tank body (1), a water inlet (6) communicated with the cold water area (4) and a water outlet (7) communicated with the hot water area (5) are arranged outside the water storage tank (2), and a plurality of heat exchange tubes (8) arranged in the depth direction of the water storage tank (2) are arranged in the oil tank body (1), one ends of the heat exchange tubes (8) are communicated with the cold water area (4), the other ends of the heat exchange tubes penetrate through the barrier wall (3) to be communicated with the hot water area (5), and water is injected into the cold water area (4) through the water inlet (6) so that the water flows through the heat exchange tubes (8), the hot water area (5) and the water outlet (7) in sequence.

2. The oil tank for an oil filled transformer according to claim 1, wherein: the number of each group of heat exchange tubes (8) is four, the four heat exchange tubes (8) are all located in the same plane, and two ends of each heat exchange tube (8) are respectively located on the adjacent side walls of the oil tank body (1).

3. The oil tank for an oil filled transformer according to claim 2, wherein: the part of each heat exchange tube (8) positioned in the oil tank body (1) is bent to form an L shape which is consistent with the outline of the inner wall of the oil tank body (1), and the part of each heat exchange tube extending out of the oil tank body (1) is vertical to the side wall of the oil tank body (1) and penetrates out of the oil tank body.

4. An oil tank for an oil filled transformer according to claim 3, characterized in that: the adjacent heat exchange tubes (8) in each group are symmetrically arranged.

5. The oil tank for an oil filled transformer according to claim 4, wherein: the end parts of the heat exchange tubes (8) in each group are arranged close to the middle parts of the side walls where the heat exchange tubes are arranged.

6. The oil tank for an oil filled transformer according to claim 5, wherein: the water inlet (6) and the part of the heat exchange pipe (8) penetrating through the cold water area (4) are both positioned on the same side of the oil tank body (1).

7. Oil tank for an oil filled transformer according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that: the end part of the heat exchange pipe (8) penetrating into the hot water area (5) is bent towards the lower surface of the water storage tank (2).

8. Oil tank for an oil filled transformer according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that: the water inlet (6) is positioned outside the lower surface of the water storage tank (2).

9. Oil tank for an oil filled transformer according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that: the water outlet (7) is positioned outside the lower surface of the water storage tank (2).

10. Oil tank for an oil filled transformer according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that: the water outlet (7) and the water inlet (6) are respectively positioned outside the adjacent side walls of the oil tank body (1).